WitLink-2000 User Manual V3[1].21

WitLink-2000

User Manual

Part Number UM WL 2000

Revision 3.21

© Copyright 2002 by Witcom Ltd., P.O.B 127, Yoqneam Illit 20692, ISRAEL. All Rights Reserved.

Information in this manual is subject to change without notice. No part of this publication may be reproduced or distributed in any form or by any means, electronic or mechanical, for any purpose, without the express written permission of Witcom Ltd.

TRADEMARKS

WitLink-2000® and WitViewTM are registered trademarks of Witcom Ltd..

Microsoft is a registered trademark of Microsoft Corp.

HP is a registered trademark of Hewlett-Packard Company.

HP OpenView, HP OpenView Professional Suite, and Network Node Manager are registered trademarks of the Hewlett-Packard Company in the United States and/or other countries.

All other products or services referred to in this manual are the trademarks, service marks, or product names of their respective holders.

DISCLAIMER: The products and specifications, configurations, and other technical information regarding the products contained in this manual are subject to change without notice. All the statements, technical information, and recommendations contained in this manual are believed to be accurate and reliable but are presented without warranty of any kind, and users must take full responsibility for the application of any products specified in this manual.

IN NO EVENT SHALL Witcom Ltd. OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGES, INCLUDING, WITHOUT LIMITATION, LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR INABILITY TO USE THIS MANUAL, EVEN IF Witcom Ltd. HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

NOTE: The equipment described in this manual has been tested and found to comply with the limits for a Class a digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy. If not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case, the users will be required to correct the interference at their own expense.

REV. 3.21

a REVISION 3.21 WitLink-2000

CHAPTER 1 INTRODUCTION ................................................................................................ 1-1 1.1 GENERAL......................................................................................................................... 1-1 1.2 SYSTEM OVERVIEW......................................................................................................... 1-2 1.3 TYPICAL APPLICATIONS................................................................................................... 1-3

1.3.1 Internet (ISP) .......................................................................................................... 1-3 1.3.2 Private Networks Wireless Bridged LANs .............................................................. 1-3 1.3.3 PCS/PCN and Cellular Networks ........................................................................... 1-4 1.3.4 Wireless Local Loop Networks and Exchange By-pass .......................................... 1-4

1.4 MAIN FEATURES.............................................................................................................. 1-5

CHAPTER 2 SYSTEM DESCRIPTION ................................................................................... 2-1 2.1 GENERAL......................................................................................................................... 2-1 2.2 BASIC STRUCTURE........................................................................................................... 2-1

2.2.1 Indoor Unit (IDU) .................................................................................................. 2-2 2.2.2 Plug-Ins ................................................................................................................ 2-12 2.2.2 Outdoor Unit (ODU) ............................................................................................ 2-17 2.2.3 Antenna................................................................................................................. 2-19

2.3 SYSTEM NETWORK MANAGEMENT................................................................................ 2-22 2.3.1 WitView-EMTM ...................................................................................................... 2-23

CHAPTER 3 INSTALLATION GUIDE.................................................................................... 3-1 3.1 GENERAL......................................................................................................................... 3-1 3.2 INSTALLATION FLOW CHART ........................................................................................... 3-1 3.3 HARDWARE INSTALLATION.............................................................................................. 3-3

3.3.1 General Guidelines................................................................................................. 3-3 3.3.2 Equipment and Unpacking ..................................................................................... 3-4 3.3.3 Packing Lists .......................................................................................................... 3-5 3.3.4 Installation Tools and Materials ............................................................................ 3-6

3.4 ANTENNA INSTALLATION................................................................................................. 3-7 3.5 ODU INSTALLATION – DIRECT MOUNT........................................................................... 3-7 3.6 IDU INSTALLATION ....................................................................................................... 3-10

CHAPTER 4 BASIC TERMINAL SETUP ............................................................................... 4-1 4.1 POWER UP ....................................................................................................................... 4-2 4.2 INITIAL CONFIGURATION PROCEDURES............................................................................ 4-2

CHAPTER 5 ANTENNA FINE ALIGNMENT ........................................................................ 5-1 5.1 PURPOSE.......................................................................................................................... 5-1 5.2 ANTENNA ALIGNMENT .................................................................................................... 5-1

CHAPTER 6 USING THE CONTROL PANEL....................................................................... 6-1

Contents

b REVISION 3.21 WitLink-2000

6.1 CONTROL PANEL BASICS................................................................................................. 6-1 6.1.1 Control Panel Concept ........................................................................................... 6-2 6.1.2 LEDs....................................................................................................................... 6-2 6.1.3 Touchkeys ............................................................................................................... 6-3 6.1.4 LCD Display ........................................................................................................... 6-4

6.2 ENTERING THE CONTROL PANEL ..................................................................................... 6-9 6.3 CONTROL PANEL OPERATION ........................................................................................ 6-10

6.3.1 Configuration Editing Session Overview.............................................................. 6-10 6.3.2 ATPC, Tx Mute and Switch-Over features............................................................ 6-11 6.3.3 Alarm Browsing Using the Touchkeys.................................................................. 6-12

CHAPTER 7 SOFTWARE KEY................................................................................................ 7-1 7.1 GENERAL......................................................................................................................... 7-1 7.2 CHANGING IDU PORT CAPABILITY.................................................................................. 7-1 7.3 LINK CAPACITY OPTIONS................................................................................................. 7-2

7.3.1 Plug in PDH ........................................................................................................... 7-2

CHAPTER 8 WITLINK-2000® 1+1 PROTECTED CONFIGURATION SYSTEM ............. 8-3 8.1 GENERAL......................................................................................................................... 8-3

8.1.1 Hot Standby Mode .................................................................................................. 8-3 8.2 OPERATION...................................................................................................................... 8-5

8.2.1 Hot Standby Mode .................................................................................................. 8-5 8.2.2 Switching Conditions.............................................................................................. 8-5

8.3 THE WITLINK-2000® REDUNDANT SWITCHING UNIT ...................................................... 8-6 8.3.1 Redundant Switch Unit LEDs ................................................................................. 8-7 8.3.2 Protected IDU Plug-Ins.......................................................................................... 8-8

8.4 PROTECTED CONFIGURATION OPTIONS............................................................................ 8-8 8.4.1 Dual ODU/Single Antenna Configuration.............................................................. 8-9 8.4.2 Mechanical Configuration.................................................................................... 8-11 8.4.3 Dual ODU/Dual Antenna Configuration.............................................................. 8-12

8.5 SYSTEM INSTALLATION ................................................................................................. 8-13 8.5.1 General ................................................................................................................. 8-13 8.5.2 Installation Equipment Required.......................................................................... 8-13 8.5.3 WitLink-2000® Radio Equipment Inventory ......................................................... 8-14 8.5.4 Dual ODU / Single Antenna - Mast Mount Installation ....................................... 8-19 8.5.5 Cable Installation ................................................................................................. 8-20 8.5.6 IDU and Redundant Switch Unit Installation....................................................... 8-20 8.5.7 Commissioning the Protected System................................................................... 8-23 8.5.8 Hot Standby Protection Mode .............................................................................. 8-23

8.6 NMS CONFIGURATION .................................................................................................. 8-25 8.6.1 Hardware Connections......................................................................................... 8-25 8.6.2 IDU IP Address Setting ........................................................................................ 8-27

CHAPTER 9 ROUTING INFORMATION PROTOCOL (RIP) ............................................ 9-1

c REVISION 3.21 WitLink-2000

9.1 ROUTER BASICS............................................................................................................... 9-1 9.2 WITLINK-2000® INTERFACES .......................................................................................... 9-1 9.3 CONFIGURING WITLINK-2000®: LAN ENVIRONMENT..................................................... 9-1 9.4 ROUTING STATEMENT ..................................................................................................... 9-3 9.5 MANAGING A LINK WITH 10/100 PAYLOAD ..................................................................... 9-4 9.6 RIP ADVANTAGES........................................................................................................... 9-6 9.7 RIP IN A CASCADING CONFIGURATION ............................................................................ 9-6 9.8 USING RIP WITH PROTECTED SYSTEM (1+1 SYSTEM)..................................................... 9-7 9.9 ENABLING RIP ON AN ETHERNET INTERFACE.................................................................. 9-9 9.10 CONFIGURING 1+1 MANAGEMENT SYSTEM..................................................................... 9-9 9.11 MANAGING A 1+1 LINK VIA DIAL-UP MODEM ............................................................... 9-10

CHAPTER 10 FAULT LOCATION AND TROUBLESHOOTING....................................... 10-1 10.1 SNMP TRAPS................................................................................................................ 10-1 10.2 EXTERNAL RELAYS ....................................................................................................... 10-1 10.3 FAULT LOCATION FINDING TOOLS................................................................................. 10-1

10.3.1 External Tester ..................................................................................................... 10-1 10.3.2 LED Indicators ..................................................................................................... 10-2

10.4 TROUBLESHOOTING....................................................................................................... 10-2 10.5 ISOLATING PROBLEMS ................................................................................................... 10-7

10.5.1 Basics.................................................................................................................... 10-7 10.5.2 Repairing the Fault............................................................................................... 10-8 10.5.3 Make Backups....................................................................................................... 10-8 10.5.4 Safety .................................................................................................................... 10-8 10.5.5 Verify the Repair................................................................................................... 10-8

CHAPTER 11 GETTING ASSISTANCE.................................................................................. 11-1 11.1.1 Support Web Site .................................................................................................. 11-1 11.1.2 Witcom Ltd. Technical Support ............................................................................ 11-2 11.1.3 Returning Witcom Ltd. Equipment ....................................................................... 11-2

CHAPTER 12 APPENDIXES..................................................................................................... 12-1 12.1 APPENDIX A: FACTORY DEFAULT SETTING ................................................................... 12-1

12.1.1 E3 + 16E1 PIN ..................................................................................................... 12-2 12.1.2 2 10/100Base-T + 4E1 PIN .................................................................................. 12-4 12.1.3 2 10/100Base-T + 4DS1 PIN................................................................................ 12-6 12.1.4 DS3 + 16DS1 PIN ................................................................................................ 12-8 12.1.5 8E1 PIN .............................................................................................................. 12-10 12.1.6 8DS1 PIN............................................................................................................ 12-12

12.2 APPENDIX B: INTERFACES (PINOUTS) ...................................................................... 12-14 12.2.1 Direct Access Cable Pinout ................................................................................ 12-14 12.2.2 Modem Connection Cable with Cable Pinout .................................................... 12-14 12.2.3 IDU Alarm Connection Pinout ........................................................................... 12-15 12.2.4 Service Channel Connectors (RJ-48) ................................................................. 12-16

d REVISION 3.21 WitLink-2000

12.2.5 Service Channel Connectors (RJ-11) ................................................................. 12-18 12.2.6 Data Channel Connectors .................................................................................. 12-19

12.3 APPENDIX C: FREQUENCY SPECTRUM ALLOCATIONS.............................................. 12-20 12.3.1 Types of WitLink-2000® Systems and Frequency Allocations ............................ 12-22

e REVISION 3.21 WitLink-2000

FIGURE 1. A TYPICAL RADIO LINK ............................................................................................. 1-2 FIGURE 2. IDU FRONT PANEL .................................................................................................... 2-3 FIGURE 3. IDU FRONT PANEL - INTERFACE CONNECTION.......................................................... 2-6 FIGURE 4. CONTROL PANEL........................................................................................................ 2-8 FIGURE 5. FRONT PANEL POWER AND ODU CONNECTIONS ..................................................... 2-11 FIGURE 6. PIN-12161 PLUG-IN: DS3 + 16DS1........................................................................ 2-13 FIGURE 7. PIN-42042 WIRELESS BRIDGE – TWO 10/100BASE-T + 4 DS1 .............................. 2-13 FIGURE 8. PIN-21040 PLUG-IN: 4 E1 BNC............................................................................. 2-14 FIGURE 9. PIN-22161 PLUG-IN: E3 + 16E1 ............................................................................ 2-14 FIGURE 10. PIN-52042 WIRELESS BRIDGE – TWO 10/100BASE-T + 4 E1 ................................ 2-15 FIGURE 11. PIN-25040 PLUG-IN: 4 E1 BNC + EWO ............................................................... 2-16 FIGURE 12. FREQUENCY BAND THEORY .................................................................................... 2-17 FIGURE 13. ODU CONNECTIONS ................................................................................................ 2-18 FIGURE 14. 1+0 CONFIGURATION (EXAMPLE) ............................................................................ 2-20 FIGURE 15. ODU –WAVEGUIDE ADAPTOR (LEFT) AND REMOTE 1+0 MOUNT (RIGHT)............... 2-21 FIGURE 16. INSTALLATION FLOW CHART ..................................................................................... 3-2 FIGURE 17. ALIGNMENT V AND H DESIGNATORS FOR POLARIZATION.......................................... 3-8 FIGURE 18. MAIN LCD SCREEN EXAMPLE ................................................................................... 4-2 FIGURE 19. QUICK CONFIG SCREEN.............................................................................................. 4-3 FIGURE 20. ENTER PASSWORD SCREEN........................................................................................ 4-3 FIGURE 21. LINK CAPACITY SCREEN ............................................................................................ 4-4 FIGURE 22. RADOME PANEL POSITION, EXAMPLE OF ANTENNA WITH ‘DRAIN GROOVE’ .............. 5-2 FIGURE 23. MAIN LCD SCREEN ................................................................................................... 6-5 FIGURE 24. SAMPLE ALARM SCREEN ........................................................................................... 6-5 FIGURE 25. ACTIVE VALUE: * ...................................................................................................... 6-6 FIGURE 26. CONFIGURED VALUE: #.............................................................................................. 6-6 FIGURE 27. ENTER PASSWORD SCREEN........................................................................................ 6-9 FIGURE 28. CONFIGURATION CHANGED MESSAGE ..................................................................... 6-10 FIGURE 29. UPDATE 2 SIDES SCREEN ......................................................................................... 6-11 FIGURE 30. PROTECTED WITLINK-2000® TERMINAL REDUNDANT SWITCHING UNIT + 2 * IDUS 8-3 FIGURE 31. DUAL ODU / SINGLE ANTENNA................................................................................. 8-4 FIGURE 32. DUAL ODU / DUAL ANTENNA................................................................................... 8-4 FIGURE 33. WITLINK-2000® REDUNDANT SWITCH UNIT - RSU (CONNECTIONS)......................... 8-6 FIGURE 34. WITLINK-2000® LEDS AND TOUCHKEYS .................................................................. 8-7 FIGURE 35. IDU PROTECTED PLUG-INS. ...................................................................................... 8-8 FIGURE 36. DUAL ODU /SINGLE ANTENNA MECHANICAL CONFIGURATION .............................. 8-11 FIGURE 37. DUAL ODU /DUAL ANTENNA MECHANICAL CONFIGURATION ................................ 8-12 FIGURE 38. SYSTEM CONFIGURATION (PER PROTECTED TERMINAL), TWO ANTENNAS PROTECTED

RADIO ...................................................................................................................... 8-14 FIGURE 39. SYSTEM CONFIGURATION (PER PROTECTED TERMINAL), ONE ANTENNA PROTECTED

RADIO ...................................................................................................................... 8-15 FIGURE 40. RSU, REDUNDANT INTERCONNECTION UNITS, IDUS .............................................. 8-18 FIGURE 41. ODU MOUNTING BRACKET ASSEMBLIES ................................................................ 8-20 FIGURE 42. ETHERNET MANAGEMENT HARDWARE CONNECTIONS ........................................ 8-26 FIGURE 43. SLIP MANAGEMENT HARDWARE CONNECTIONS..................................................... 8-27

Figures

f REVISION 3.21 WitLink-2000

FIGURE 44 WITLINK-2000® REDUNDANT SWITCH UNIT IP ADDRESS ....................................... 8-28 FIGURE 45. CONNECTION BETWEEN TWO 10 MBS PORTS............................................................. 9-2 FIGURE 46. ADDING ROUTING STATEMENT TO STATIONS – USING OUT-OF-BAND ....................... 9-3 FIGURE 47. 10/100 PAYLOAD CONNECTIONS WITH OUT-OF-BAND MANAGEMENT ...................... 9-4 FIGURE 48. 10/100 PAYLOAD CONNECTIONS WITH IN-BAND MANAGEMENT............................... 9-5 FIGURE 49. 10/100 PAYLOAD CONNECTIONS WITH IN-BAND MANAGEMENT............................... 9-7 FIGURE 50. IP CONFIGURATION OF THE 1+1 SYSTEM................................................................... 9-8 FIGURE 51. 1+1 SYSTEM WITH MODEM CONFIGURATION FOR REMOTE MANAGEMENT............. 9-10

g REVISION 3.21 WitLink-2000

Welcome to the WitLink-2000® Point to Point Communication System Witcom Ltd. is pleased to present the WitLink-2000® system. It is the first generation in the Witcom Ltd. family of compact Digital Radio Relay Systems (DRRS).

The purpose of this manual is to provide detailed information about the technical and functional aspects of setting up and operating the WitLink-2000® system

About this Manual This manual provides a detailed description of the WitLink-2000® system components, operating procedures, installation instructions and general network management topics.

Chapter 1 provides a system overview and briefly describes typical applications and benefits.

Chapter 2 provides a system description and explains the main components.

Chapter 3 provides an installation guide for the ODU and IDU components.

Chapter 4 provides a detailed basic terminal setup using the WitLink-2000® IDU Control Panel.

Chapter 5 presents procedures for fine adjusting the WitLink-2000® antenna.

Chapter 6 gives the basic setup instructions for using the IDU Control Panel.

Chapter 7 provides “how to” instructions for the WitLink-2000® 1+1 Protected Configuration System.

Chapter 8 presents the principles of the WitLink-2000® Routing Information Protocol (RIP).

Chapter 9 describes the fault location and troubleshooting including main correction activities.

Chapter 10 shows how to get assistance from the Internet or from Witcom Ltd. Technical Support as well as general contact details. Chapter 11 includes the Appendixes. It provides a glossary and technical information as: A: Factory default settings; B: Layout of interfaces connections; C: Frequency spectrum allocations.

Who Should Use this Manual This manual is intended for the technical personnel who will install and operate the WitLink-2000® system. Such personnel must be experienced and skilled with on site, physical installation and connection of millimeter wave equipment, including maintenance work. This manual is also

h REVISION 3.21 WitLink-2000

intended for system administration personnel who will perform the initial configuration and subsequent re-configuration of the system as well as current system maintenance activities.

Safety Icon Conventions The following safety icon conventions are used in this manual:

A warning. Not following the instructions carefully may cause personal injury, equipment damage or both.

Recommended activity.

i

Important information. Read carefully.

Contact Information Should you have any questions regarding our services please contact us, or visit our Internet home page.

Witcom Ltd.

P.O.B 127, Yoqneam Illit 20692, ISRAEL

Tel: +972 - 4 - 9599666

Fax: +972 - 4 - 9592050

E-mail: [email protected]

Web: http://www.wit-com.com

For technical support: [email protected]

1-1 REVISION 3.21 WitLink-2000

CHAPTER 1 Introduction

1.1 General

The WitLink-2000® is a cost-effective, line-of-sight (LOS) DRRS operating in the millimeter-wave frequency bands. The system supports a wide range of data rates, from 6.0 Mbps to 52 Mbps. WitLink-2000® interfaces to North American digital signaling at 4 DS1 to 16 DS1 and DS3 or ETSI standard signaling at 4 E1 to 16 E1 and E3. WitLink-2000® also provides a wireless connection of Ethernet 10/100Base-T.

The WitLink-2000® product line serves the following communication markets:

• Internet Access Systems: Used by Internet Service Providers (ISPs).

• Private Networks: Wireless Bridged LANs.

• PCS/PCN and Cellular Networks: High-speed links between base stations.

• Wireless Local Loop Networks: Fixed wireless systems of Local Exchange Carriers (LECs).

• Business Bypass or Local Exchange Bypass: Bypass systems of Competitive Access Providers (CAPs) and Competitive Local Exchange Carriers (CLECs).

The WitLink-2000® system can be managed by a scalable Witcom Ltd. proprietary SNMP network management application called WitView-EMTM, which is compatible with Windows® 9x/NT/2000/. The WitLink-2000® system has a standard MIB interface that can be managed by HP OpenView and any other similar platform. WitView-EMTM is an open system, which uses the TCP/IP protocol to manage all units of the link. The WitView-EMTM software, supplied with the WitLink-2000® system, facilitates configuration and link management activities. It is recommended to use the companion manual, ‘WitView-EMTM, SNMP Management System.’


1.2 System Overview

In order to establish a WitLink-2000® link, a WitLink-2000® terminal is installed at each location that needs to be linked (denoted as the ‘Local site’ and ‘Remote site’ Terminals as shown in Figure 1), separated by a Line Of Sight (LOS). The achievable range is determined by the availability requirements, operating frequency and channel state. Microwave Radio Relay Systems are sensitive to precipitation as: mainly rain, hale, fog, and clouds.

Figure 1. A Typical Radio Link

Each WitLink-2000® terminal is normally mounted flush to an appropriate microwave parabolic antenna dish that provides the mounting / alignment devices. The Link consists of an Indoor Unit (IDU), an Outdoor Unit (ODU) and an antenna as shown in Figure 1. In a typical installation, the IDU is mounted inside an enclosed area (typically, a standard 19” wiring closet) and the ODU and the antenna are mounted typically on a tower or roof top. A single coaxial cable connects the IDU to the ODU; the antenna itself can be connected directly to the ODU.

Note: The terms ‘Local’ and ‘Remote’ are relative, and depend on where the system is operated from. The ‘Local’ terminal is the operator connection location. Thus, the ‘Remote’ terminal becomes ‘Local’ when the operator is at the Link side.


1.3 Typical Applications WitLink-2000® provides great flexibility in setting up point-to-point links on a very cost effective basis. This is achieved by eliminating unnecessary outlays in expensive leased lines or fiber optic land-based lines. Low cost of ownership makes Return On Investment (ROI) attractive compared to leased lines.

Millimeter-wave advantages over copper/fiber alternatives include: short installation time, easy maintenance using Network Management Software (NMS), high immunity to natural disasters, independence of competing Postal Telegraph & Telephone organizations (PTTs, avoids the need to secure normal right-of-way or physical installation permits, and is deployable depending on changing needs).

The simplicity of the millimeter-wave link installation makes it easy for the user to implement WitLink-2000® in a variety of applications. It also means that the user can conveniently move a previously installed link to a new location to meet the requirements of a changing system. WitLink-2000® enables seamless future capacity upgradeability, protecting customer investment, reducing logistics, spare parts and product stocking.

The following sections briefly describe typical applications.

1.3.1 Internet (ISP) The demand for higher Internet broad band requires ISP backbones and ISP with higher capacity and ISP connectivity to businesses and customers. The scalable WitLink-2000® radio system has been optimized for these applications. When higher capacities are needed, software changes the required capacity, and radio hardware does not have to change.

1.3.2 Private Networks Wireless Bridged LANs Millimeter wave radios are also used to provide communications links for private networks. Companies or enterprises located in areas without extensive telecommunications infrastructure that press for broadband communication services in areas where the cost of local access is high, installing and maintaining a millimeter wave wireless network can be very cost effective. Typical users of private networks include:

• Government agencies such as land management

• Municipal agencies.

• University campuses.

• Large utilities such as oil, gas, and electric supply companies.

• Companies with widely deployed assets such as railroads and timber resource managers.


1.3.3 PCS/PCN and Cellular Networks Cellular operators mainly utilize millimeter wave radio links for Base Transceiver Station (BTS) interconnections, BTS to Base Station Controller (BSC), and BSC to BSC interconnections. Higher capacities are required the closer the Public Switching Telephone Network is to a BTS, or a BSC. One WitLink-2000® radio link is suitable for all interconnection needs, with scalable capacity as more subscribers demand higher interconnection capacities.

1.3.4 Wireless Local Loop Networks and Exchange By-pass

Wireless systems in emerging markets were originally deployed to provide premium services to a mobile subscriber base. However, middle and lower income countries have driven mobile network providers into a new business - the substitution of wireless service for fixed service, i.e., fixed wireless networks, providing a cost-effective solution in situations where no wireless infrastructure exists. Wireless local loop networks (“last mile”) are implemented mostly by Local Exchange Carriers (LECs).

Alternative carriers, such as Competitive Access Providers (CAPs) and Competitive Local Exchange Carriers (CLECs) use radio links to establish standard telecommunications links between their customers' sites and their own backbone networks. This way CAPs and CLECs provide their customers with cost-effective local area telephone service and cheaper long distance services.

The WitLink-2000® radio is a perfect solution for Wireless Local Loop and the Local Exchange By-pass applications.


1.4 Main Features

• Interface to transmission systems include: - Up to 16 x DS1, DS3, DS3 + 4 DS1 - Up to 16 x E1, E3, E3 + 1E1 - 2x Ethernet (10/100Base-T) + 4E1 / 4DS1 - All tributaries are connected to a modular plug-in board, which enables

scalability of the product • Scalable channel capacity from 4 DS1 to DS3 + 4 DS1, or 4 E1 to E3 +E1 • Common IDU and ODU for all data rates • Unique digital ASIC modem • Software-controlled reduced capacity uses Spectrum-by-Demand • Tributaries loop backs for diagnostics • A powerful Error Correction scheme: Concatenated convolution and Reed Salomon FEC • LCD and touch keys – easy front panel configuration and monitoring • Supports alarms and external inputs • Intuitive, pro-active SNMP NMS • Standard GUI • Full software-configurability • NMS access includes the following:

- Direct access from a serial port - Remote dialup modem access - Ethernet Remote access through the wireless link on 10/100 PIN (in-band),

or through the 10 Mbps management port (out-of band). - IDU cascading - IP routing supported


CHAPTER 2 System Description

2.1 General

This chapter provides a comprehensive description of the WitLink-2000® system. The basic WitLink-2000® terminal includes three components: an Indoor Unit (IDU), an Outdoor Unit (ODU) and a millimeter-wave antenna. The first section of this chapter describes how two terminals function as a link. Then, each of these components is individually described. Thus, this chapter serves as an introduction to the subsequent installation instructions provided in CHAPTER 3 and onward.

In addition, this chapter provides an introduction to Network Management System (NMS) software and configuration issues. For comprehensive information, refer to the companion manual, ‘WitView-EMTM, SNMP Management System.

For the technical specifications of the WitLink-2000®, refer to the required Technical Specification on our Web site at http://www.wit-com.com.

2.2 Basic Structure

The millimeter link includes two WitLink-2000® terminals. Each terminal consists of an Indoor Unit (IDU), an Outdoor Unit (ODU) and a millimeter-wave antenna. See Figure 1. A Typical Radio Link. Typically, the IDU is installed inside a 19” wiring rack-mount, and the ODU and the antenna are mounted outdoors on a tower or rooftop. A single coaxial cable connects the IDU to the ODU; the antenna itself can be directly connected to the ODU.

Digital data and service channels, radio overhead and network management information at the local terminal are fed to the IDU. The IDU converts the digital data to TTL level signals and multiplexes them with the service channels onto an aggregate data stream. The IDU digital modem modulates the aggregate signal to create an Intermediate Frequency (IF) signal. The IF signal is superimposed with DC power and sent to the ODU on a coaxial cable. The ODU converts the IF signal to a Radio Frequency (RF) signal to the antenna of the remote terminal. At the remote terminal ODU, the received signal is converted back to an IF signal. The IF signal is fed through the coaxial cable to the IDU, where it is demodulated and demultiplexed into digital data and the appropriate service channels. The link is full-duplex (bi-directional), fully symmetrical and transparent to the data stream.


2.2.1 Indoor Unit (IDU) The IDU is a standard 1U-high, 19” shelf unit intended for rack-mounting. On the front panel, the IDU contains the tributary interfaces, service channels, control panel, DC supply and network management interfaces. The tributaries and service channels are multiplexed, modulated, converted to IF, passed along with the DC voltage and telemetry channel on a single cable to the ODU.

A plug-in unit, located within the IDU, is used to interface various transmission systems with the IDU. The IDU comprises the modem ASIC, Motorola XPC860 controller tributary multiplexer, power supply and some additional hardware.

The IDU is a software-driven device that operates unattended. The millimeter-wave link is configured, operated and monitored through a user interface. The user can access the system locally through the Control Panel, or from a computer with WitView-EMTM which is directly connected to the IDU, or remotely through an Ethernet LAN or via a modem connection.

Using the IDU, each segment of the link can be tested, including the tributary, the IDU, the ODU and the telemetry connection. The remote terminal can also be tested using the local IDU front panel touchkey.

Two IDU models are available for international digital rates: The ETSI standard, (European Telecommunications Standards Institute). The FCC standard, (Federal Communications Commission).

The IDU model designations are detailed in Table 1.

Designation Description

IDU-2001 1U high version adhering to FCC standards

IDU-2002 1U high version adhering to ETSI standards

Table 1. IDU Model Designations: IDU Versions

2.2.1.1 IDU Physical Description The IDU Front Panel:

• Serves as an interconnection panel for interfacing to external equipment by providing access to all the physical cable connections.

• Provides a user interface to the Network Management System through the Control Panel, via a PC connection with Network Management System software (such as WitView-EMTM).

Refer to Figure 2 for the IDU front panel description.


Figure 2. IDU Front Panel

The IDU contains four functionally distinct areas as follows (from left to right): A Plug-In Unit, B, C, D Interface Connections, E Control Panel, and the F Power and ODU Connections. Also available are the TEST and ETH Ports.

A Plug-In Unit

• Tributary interfaces (E1, E3, DS1, DS3, 10/100Base-T)

Interface Connections:

NOTE: DATA-OUT is reserved for future use, and DATA-IN is regarded as DATA.

B Service channels: DATA, NMS IN/OUT (asynchronous over TCP/IP),

C Relays and external input connector

D RSU (Redundant Switch Unit) connector for the 1+1 protected mode

E Control Panel:

• LCD, touchkeys, and LEDs

F Power and ODU Connections

• DC supply

• Grounding Lug

• IDU to ODU connector

• Reset button

• Fuse

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2.2.1.2 Plug-In Unit IDU flexibility is due to the modular plug-in unit design, which ensures future updates and supports diversified network requirements. The plug-in units also enable software-controlled “reduced capacity” utilizing “spectrum-on-demand” scalability.

The Ethernet 10/100Base-T plug-ins support wireless bridge applications from one building to another.

The following table details the plug-in models that are currently available.

Standard Designation Description

PIN-12161 DS3 plus 1 to 16 DS1 (RJ48 Version)

(used as 16 DS1 or as DS3 + 4 additional DS1 wayside) FCC

PIN-42042 Two 10/100Base-T plus 4 DS1

PIN-21040 PDH-4 E1 Plug-In (BNC type/75Ω)

PIN-25040 PDH-4 E1 Plug-In + EOW (BNC type/75Ω)

PIN-22161 E3 plus 1 to 16 E1 (RJ48 Version)

(used as 16 E1 or as E3 or E3+one E1)

ETSI

PIN-52042 Two 10/100Base-T plus 4 E1

Table 2. Plug-in Unit Model Designations

2.2.1.3 Interface Connections The interface connections provide the following:

• 10Base-T (10Mbps) Ethernet port for SNMP management.


• Transparent data line (See note on the previous page regarding ‘DATA’) supporting the RS232 protocol with data rates ranging from 1200 bps to 19.2 kbps only with Xon/Xoff flow control (ASCII files).

• Network Management System port to configure and manage the system (RS232) or to connect NMS data of multiple IDUs at a central location.

• Test port (for Witcom Ltd. personnel only!).

• Five user-definable alarm relays that can be set using the software. Each relay provides normally close and normally open states. The relay contact is used to energize alerting devices or any equipment installed at the site. Most WitLink-2000® alarms can be mapped to each of the five alarm relays.

• Four external inputs at the TTL level to control or change the link's mode of operation. The IDU can sense low level/high level/low-to-high transitions and define the severity level as a warning, error or fatal condition. All external inputs are opto-coupler protected and provide interfacing to signals of 2.4 to 9 VDC.

• RSU (Redundant Switch Unit) interface for protected mode operation (1+1). For detailed information, refer to CHAPTER 8 WitLink-2000® 1+1 Protected Configuration System.


The figure below shows the interface connections area of the IDU Front Panel:

Figure 3. IDU Front Panel - Interface Connection

NOTE: DATA-OUT is reserved for future use, and DATA-IN is regarded as DATA.

i


The available connections are described in the table below.

No. Designation Component Description To/From Note

1 1+1 110-pin connector

For connection with RSU (Redundant Switch Unit) for 1+1 protected mode

Refer to CHAPTER 8 WitLink-2000® 1+1 Protected Configuration System.

2 ALARMS D-type 25 pin female connector

5 alarm relay contacts, 4 external inputs

Devices connected to the terminal

Dry contact output (NC/NO)

3 NMS-IN Shielded RJ48

NMS input Computer or dial-up modem

SLIP protocol /direct RS-232 remote modem.

4 NMS-OUT Shielded RJ48

NMS serial daisy- chaining

Cascaded IDU Connect to next stacked IDU

5 TEST Shielded RJ48

Test interface used only by Witcom Ltd.. Personnel

Terminal Test port to PC com port

Direct RS-232 with Password

6 ETH Shielded RJ48

10Base-T Ethernet interface

Hub, switch or computer

For SNMP out-of-band management

7 DATA Shielded RJ48

General purpose transparent data (Ascii)

Asynchronous RS232 devices

Speed Up to 19.2 kbps Xon/Xoff

Table 3. IDU Interface Connections Components

For connector pinouts (wiring), refer to APPENDIX B: Interfaces (Pinouts).


2.2.1.4 Control Panel The Control Panel contains the LCD display, touchkeys and LED indicators. It serves as both the user interface and Control Panel.

The LCD is illustrated in Figure 4.

12

3

4

5

7 8 9 10 11 12 1514 16 17

6

13

Figure 4. Control Panel

A stand-alone IDU operating without WitView-EMTM can be configured, monitored, controlled, and display system messages and indications on the Control Panel. An NMS application such as the WitView-EMTM (Refer to the companion manual, ‘WitView-EMTM, SNMP Management System’ for more information.) running on a Network Management Station is another means of communicating with the WitLink-2000® terminal.

Control Panel display and touchkeys The Control Panel enables easy system configuration of the local and remote terminals. It also displays the local and remote terminals status and alarms, statistics and test results. Current/working parameters and system messages are displayed on the 16 character, two-row, LCD display. The menu options are grouped and presented on the LCD in a tree structure. The root of each group leads to the next branch (menu option), descending from top to bottom. For further description of the Control Panel operation, refer to CHAPTER 6, “Using the Control Panel.” The Control Panel keys and indications are described in the following tables. (Refer to Figure 4 for control panel interface.)


Alarm messages are short messages that produced by the system and indicate a fault condition. The messages are displayed in the Control Panel's status information window, and can also be read in the Alarms Log tab dialog box. Control Panel LED Indicators The LED indicators are located along the bottom of the Control Panel. The LEDs alert the operator of a fault condition and are classified according to the following groups: LOCAL, REMOTE, and ALARMS.

Additional LEDs indicate the status of the power supply and the link as well as whether the Local or the Remote terminal is displaying a message or status on the LCD screen of the Control Panel. The color of a LED can be either green or yellow: A green LED means that the function is OK. A yellow LED means that there is an error condition in the system.

The following LED display is an example of a normal operation, where the link is up and running, and the LCD is set to the Local (LOC) terminal.

Note that the default DISPLAY selection mode is local (LOC) - LED is green; all LED alarms are off (LOCAL, REMOTE and ALARMS); and the power (PWR) LED is green.

Table 4. IDU Control Panel Touchkeys

No. Key Description Note

1. Forward Arrow Scroll forward to choose a command parameter at the same level, or to edit a digit.

2. Backward Arrow Scroll backward to choose a command parameter at the same level, or to edit a digit.

3. SEL/SAVE Select or save groups or individual parameters. Used to enter menus as well.

4. LOC/REM Select local or remote terminal. LOC/REM LED indicates state.

5. ESC Move upward in the tree. .


IDU Control Panel indications are described in the following table. (Refer to Figure 4.)

No. Group Designation Function Note

6.

LCD Display

Displays LINK status, messages and parameters.

Cofigurable via the IDU touchkeys.

7.

DISPLAY LEDs

LOC LED Green light indicates that the local terminal is selected.

The local terminal LCD is displayed.

8.

REM LED Green light indicates that the remote terminal is selected.

The remote terminal LCD is displayed.

9.

LOCAL LEDs

IDU LED Yellow indicates malfunction of the local side.

10.

ODU LED Yellow indicates malfunction of the local ODU.

11. CBL LED Yellow indicates disconnection or failure of local terminal conn.

12.

REMOTE LEDs

IDU LED Yellow indicates malfunction of the remote side.

13.

ODU LED Yellow indicates disconnection or failure of remote terminal cable.

14.

CBL LED Yellow indicates disconnection or failure of remote terminal conn.

15.

ALARMS LEDs

1, 2, 3, 4, 5 LEDs A yellow alarm LED alerts the operator that the Relay mapped to this LED is lit.

The mapping is done via the SNMPSNMPS management

16.

LINK LED

LINK LED A yellow LED indicates a fault.

17.

PWR LED

PWR LED A green LED indicates that the terminal is powered ON.

Table 5. IDU Control Panel Indications

2.2.1.6 Power and ODU Connections The IDU can be powered by 22 - 60 VDC according to on-site requirements from batteries or a saftey-approved power supply. Powers switch and external replaceable fuse protects the power input and located on the front panel. The ODU is powered via the IDU through the coaxial cable.


The power and ODU connections are shown in Figure 5.

Figure 5. Front Panel Power and ODU Connections

Warning: Always unplug the power cord from the socket before checking the line fuse to avoid electrical shock.

The IDU power socket has 3 connecting points. The left connection point is marked with "V". The center point is GND and marked with , and the right side point is not used. When terminal is rack mounted or two terminals are connected to the same power source, the connection conditions to the pwer source should be as following:


1. The "V" point can be connected either to positive pole or the negative pole of the power supply.

2. In case of two IDUs (or more) connected to the same power source, the polarity of both terminals should be kept the same.

3. In case of rack mount installation, the polarity of the center conneting point ( ) should be the same as the GND point of the power supply.

Refer to the following table for a description of the power and ODU connections.

No. Designation Component Description Note

1 ODU Coaxial N-type female connector

Connection to ODU

2 DC PWR* 3-pin receptacle DC Power IN (22 - 60 VDC)

-48V typical

3 RST Pushbutton System reset Terminal Reset

4 FUSE** 3A

5 Grounding lug

Table 6. Power and ODU Connections

* Note: Witcom provides a bi-color power cable (about 1 m long). The RED wire should be connected to the "V" and the BLACK wire should be connected to the ground ( ).

** Note: As IDU supports 22 to 60 VDC, two types of fuses are provided with each IDU to cover ranges of 22-36 V DC and 36-60 V DC. When using supply voltage of 22-36 VDC, a 3A fuse should be used. When using supply voltage of 36-60 VDC, a 1.6 a fuse should be used with the IDU. WitLink-2000 is shipped with a 1.6 Amp fuse installed, to support 36-60 VDC. An additional fuse, to support 22-36 V DC, (3 Amp) is also provided.

2.2.2 Plug-Ins The Plug-Ins in this section are only briefly described. Refer to the relevant Technical Specification sheets for details

.


2.2.1.7 PIN-12161 Plug-In: DS3 + 16DS1 The DS3+16 DS1 Plug-In can be used up to a maximum capacity of DS3+4 DS1. It can be configured to 4 DS1, 8 DS1, 16 DS1, DS3, and DS3+4 DS1.

Figure 7. PIN-12161 Plug-In: DS3 + 16DS1

2.2.1.8 PIN-42042 Wireless Bridge – Two 10/100Base-T + 4 DS1

This plug-in has a digital capacity of 2 10/100 Base-T ports (incl. full duplex) + 4*DS1 ports. It also has configurable capacities for 2 10/100 Base-T, 2 10/100 Base-T + 4 DS1 ports.

Figure 8. PIN-42042 Wireless Bridge – Two 10/100Base-T + 4 DS1

DS1 – Shielded RJ48 connectors (x16), 100 ohm

DS3 – Tx / Rx BNC connectors (x2), 75 ohm

10 / 100Base-T – Shielded RJ45 connectors (x2), 100 ohm

DS1 – Shielded RJ48 connectors (x4), 100 ohm balanced


2.2.1.9 PIN-21040 Plug-in: 4E1 BNC The 4E1 BNC type Plug-in can be used up to a maximum capacity of 4E1. The inputs supports 75 ohm unbalanced.

Figure 10. PIN-21040 Plug-In: 4 E1 BNC

2.2.1.10 PIN-22161 Plug-in: E3 + 16E1 The E3+16 E1 Plug-in can be used up to a maximum capacity of E3 + E1. It can be configured to 4 E1, 8 E1, 16 E1, E3, and E3+E1.

Figure 11. PIN-22161 Plug-in: E3 + 16E1

E1 – Shielded RJ48 connectors (x16), 120 ohm balanced

E3 – Tx / Rx BNC connectors (x2), 75 ohm unbalanced


2.2.1.11 PIN-52042 Wireless Bridge – Two 10/100Base-T + 4 E1

This plug-in has a digital capacity of 2 10/100 Base-T ports (incl. full duplex) + 4 E1 ports. It also has configurable capacities of 2 10/100 Base-T, 2 10/100 Base-T 1, 2 or 4 E1.

Figure 12. PIN-52042 Wireless Bridge – Two 10/100Base-T + 4 E1

The Ethernet 10/100Base-T throughput equipped with online status indications.

The indication performed by 2 LEDs on each port side, following its labels description:

Left Side LED:

HDX Off Half-Duplex while the LED is off FDX G Full-Duplex while the LED is green Collision BG Collisions while the LED is blinking green Disabled Y The Port is disabled while the LED is yellow Right Side LED:

Connect 10 G The port is configured to 10Mbps while the LED is green Activity 10 BG Throughput is 10Mbps while the LED is blinking green Connect 100 Y The port is configured to 100Mbps while the LED is yellow Activity 100 BY Throughput is 100Mbps while the LED is blinking yellow

10 / 100Base-T – Shielded RJ45 connectors (x2), 120 ohm

E1 – Shielded RJ48 connectors (x4), 120 ohm balanced


2.2.1.12 PIN-25040 Plug-in: 4E1 BNC + EOW The 4E1 BNC+EOW type Plug-in can be used up to a maximum capacity of 4E1. The inputs support 75 ohm unbalanced. Each E1 has a dedicated green LED to notify that Rx is up.

This plug-in features an RJ-11 connector for a telephone handset and buzz button to buzz the remote side. Refer to 12.2.5 Service Channel Connectors (RJ-11) for pinout definitions.

Figure 13. PIN-25040 Plug-In: 4 E1 BNC + EWO

The RJ-11 connector enables telephone communications between two units. The handset is a “k” style unit. It incorporates low-level electric microphone and a dynamic receiver equipped with a hearing aid coil and a varistor for limiting the receive level.

Transmitter Receiver

Transmit Output Level at 100Hz:

-46dBV +/- 4db

Receive Output Level at 100Hz:

79dBSPL +/- 4db

Output Impedance at 100Hz:

1000 +/- 300ohms.

Receive Impedance at 100Hz:

150 +/- 20%.


2.2.2 Outdoor Unit (ODU) The ODU contains the RF section of the millimeter-wave link and generates all of the RF signals, simultaneously indicating their status to the IDU. The ODU can be mounted on a mast, tower or rooftop, and it can be disconnected from the antenna without affecting antenna alignment.

2.2.2.1 ODU and IDU Method of Operation The WitLink-2000® terminal consists if the Indoor Unit (IDU), the Outdoor Unit (ODU), and the coaxial cable that connects both units.

The coaxial cable is used to transfer the uplink IF signal from the IDU to the ODU. It transfers the downlink IF signal back to the IDU and telemetry signals. The cable also provides DC power to the ODU.

2.2.2.2 Frequency Band Theory Both FCC and ETSI radio standards define Transmit (Tx), and Receive (Rx) frequencies. The spacing between the Tx and Rx frequencies are fixed, and vary depending on the frequency range and the applicable standards. Most frequency ranges are comprised of four frequency bands. A WitLink-2000® local terminal that transmits on band 1 receives a signal transmitted in band 3 from the remote terminal. By the same token, a WitLink-2000® terminal that transmits in band 4 receives a signal transmitted in band 2.

Figure 14. Frequency Band Theory


2.2.2.3 ODU Housing and Connections The ODU electronics are located in a hermetically sealed enclosure and mounted flush with the antenna. The antenna is directly interconnected with the ODU using a special connector.

Refer to ‘APPENDIX C: Frequency Spectrum Allocations’ for frequency band detailed information and for the available ODU model designations.

The WitLink-2000® terminal can be mounted on a mast, wall, tower, or rooftop, and it can be disconnected from the antenna without affecting antenna alignment. Refer to Section 2.2.3 for more information.

Figure 15. ODU Connections

The table on the following page describes the ODU connections.

2 5 6 4

4 2 1


No. Type Description Note

1 Grounding lug Ground connection

2 Alignment Holes Three large holes indicate angle of slot to align waveguide

The 3 holes are also used to install a testing platform

3 BNC AGC output of the ODU

Used for antenna alignment and test purposes

4 Coaxial N-type female connector

Connection to IDU The DC power supply and the telemetry with the ODU is done via this cable. RF rates:

Rx frequency: 400MHz Tx frequency: 140MHz Telemetry frq: 10MHz

5 White imaginary line across center shows the slot alignment angle for the polarization

The white angled line is only imaginary

6 Mounting holes Used for ODU non-direct mount ( 1+0 and 1+1 )

Table 7. List of ODU Connections

2.2.3 Antenna The antenna may be connected directly to the ODU (direct mount) by the attached locking latches, and then mounted as one unit to the mast. Also, the antenna and the ODU can be separately connected to a mast (non-direct-mount). In this mode, the ODU is mounted on a Remote 1+0 Mount, and connected to the antenna with a flexible Waveguide by means of an ODU Adapter.

Refer to ‘Section 3.5 ‘ for more information about ODU direct mount installation details.

Refer to ‘Section 2.2.3.1’for more information about the Remote 1+0 Configuration and an example configuration.

For the available antenna model designations refer to the Technical Specifications on our Web site.


2.2.3.1 WitLink-2000® Remote 1+0 Mount Kit (For non-direct antenna attachment, 1+0 configuration)

The kit allows the service engineer to separately mount the WitLink-2000® ODU to the mast by means of a Remote 1+0 Mount. The antenna is attached to the mast with its OEM supplied hardware. A flexible Waveguide connects both of the units. An ODU Adapter is installed between the WitLink-2000® ODU and the flexible Waveguide.

The figure below illustrates the location of the Remote 1+0 Mount and the ODU Adapter for a 1+0 Configuration. Note that the antenna, its hardware, and the outdoor unit are only examples.

Figure 16. 1+0 Configuration (Example)

Mast

Flexible Waveguide

Remote 1+0 Mount (example)

ODU Adaptor Outdoor Unit (example)

Antenna


Note the following miscellaneous spare parts:

Part S/N Description

Remote 1+0 Mount Kit

MNT-1+0-F Allows mounting of ODU separately to larger antennas via waveguide in 1+0 configuration. Use with standard waveguide antenna interface. Can also be used in 1+1 configurations, with two remotely mounted antennas. ( Kit Includes Remote 1+0 Mount and an ODU Adapter).

* F = Frequency 7/8/13/15/18/23/38GHz

ODU –Waveguide adaptor

OAD-F ODU adaptor, used to connect flexible waveguide to the Witlink ODU-7/8/13/15/18/23/26/38 GHz

Refer to the figure below:

Figure 17. ODU –Waveguide adaptor (left) and Remote 1+0 Mount (right)


2.3 System Network Management

The WitLink-2000® Terminal can be accessed for management through two physical ports and one Plug-in as shown in the following table:

IDU Physical Port Application Notes

ETH

WitView-EMTM SNMP platform such as HP OpenView

Out-Of-Band Management

10Mbps (10Base-T)

ETH port (RJ45 connection on the IDU Front Panel)

NMS-IN

WitView-EMTM SNMP platform such as HP OpenView

Out-Of-Band Management

SLIP connection (RJ45 connection on the IDU Front Panel)

RS 232 to modem or PC COM

When using a

10/100 Base-T Plug-in

WitView-EMTM and SNMP platform such as HP OpenView

Ethernet In Band Management (RJ45 connection on the 10/100 Base-T Plug-in)

Table 8 WitLink-2000® Terminal Management Ports


2.3.1 WitView-EMTM WitView-EMTM (Element Manager) manages a Link that consists of two terminals: ‘Local,’ and ‘Remote.’ It is an intuitive, pro-active network management system with enhanced diagnostic and performance monitoring tools. It provides an open, reliable and user-friendly operation with a familiar Graphical User Interface (GUI) and a Simple Network Management Protocol (SNMP) based on a standard SNMP platform such as HP OpenView. WitView-EMTM provides the SNMP application to pro-actively manage all the links from a single-operator console. WitView-EMTM runs on Microsoft Windows® 9x/Me/NT/2000 workstations.

WitView-EMTM is a stand-alone SNMP configuration software that is included with each link. All radio links can be easily in-band (only for a 10/100 PIN) or out-of-band controlled from the management station.

Accessing the WitLink-2000® Terminal through the WitView-EMTM is convenient and provides many options.

The WitView-EMTM provides the following advantages:

• User-friendly management program (making it easy to use and understand even for novice users)

• Easy setup program

• Possible to configure and read status from a remote terminal

• Provides performance statistics, alarms, and self-tests.

• Runs on-line (polling, with real-time status and color-coded mapping, helping users to quickly pinpoint trouble spots).

• Can run licensed version under HP OpenView Node Manager for Windows® 2000/NT network management platform

• Allows creation of custom configuration files through a graphical interface for downloading to a different WitLink-2000® Terminal.


CHAPTER 3 Installation Guide

3.1 General

This chapter outlines the complete installation and configuration procedure for the WitLink-2000®, and a flowchart of this process is given.

3.2 Installation Flow Chart

Installation personnel should first verify that all pre-installation preparations have been made. Installation should be performed in the following order: antenna installation, ODU installation (Section 3.5) and IDU installation (Section 3.6).

The basic terminal setup is performed using the LCD touchkeys.

After configuration, perform antenna alignment ( CHAPTER 5, ‘Antenna Fine Alignment’). See CHAPTER 6, ‘Using the Control Panel’ to learn about the IDU Control Panel. Advanced configuration (management and fine-tuning activities of the WitLink-2000®) can be performed with the WitView-EMTM. Refer to the companion manual, ‘WitView-EMTM, SNMP Management System’ for details.

1+1 Protected Configuration

In general, refer to CHAPTER 8 for information about the ‘WitLink-2000® 1+1 Protected Configuration System.’ For particular information about the ODU Installation on a 1+1 Mount Kit, refer to Sections 8.5.3.2, and 8.5.4. For information specifics about the IDU + RSU Assembly, refer to Section 8.5.6.1.


The procedures described in these chapters must be performed for proper link operation.

Before Installation

Antenna Installation

ODU Installation ODU Installation1+1 Mount Kit

IDU Installation IDU + RSU Assembly

Power Up

Basic Terminal SetupUsing Quick Config

Antenna Alignment

Advanced Configuration

Functional Check & Commissioning

Fault Location &Corrective Action Guide

(Refer to Chapter 8)END

OK?No Yes

Section 3.3

1+0 1+1

Section 3.5

Section 3.6

Section 4.2

Chapter 4

Chapter 5

Chapter 6

Section 4.1

Section 3.4

Section 7.5

Section 7.5

Figure 18. Installation Flow Chart


3.3 Hardware Installation

This section describes the physical installation of the WitLink-2000® hardware. Each WitLink-2000® terminal consists of an Indoor Unit (IDU), and Outdoor Unit (ODU) and antenna. The ODU fits flush to the antenna (direct mount), which is mounted on a mounting pole. The IDU and ODU are interconnected with a coaxial cable. See Section 2.2.3 for a description of a non-direct mount which uses the Remote 1+0 Mount.

The ODU electronics and antenna are installed onto the mounting pole in three steps. First, the OEM’s Antenna Mount Assembly is installed on the user’s mounting pole. Then, the antenna is attached to the Pole Mount Assembly. Finally, the ODU is attached to the antenna, and is secured by clips. The polarization of the antenna is determined by the orientation in which the ODU is mounted onto the antenna. The user decides whether a link will operate in horizontal or vertical polarization. After these three steps are completed, the user connects the coaxial cable.

The IDU is typically installed in a 19” rack mount configuration. Next, the coaxial cable and tributary signal cabling are attached. Finally power is connected.

This section covers the following topics:

• Pre-installation deployment - guidelines, unpacking, inventory, and tools

• Antenna installation

• ODU installation

• IDU installation

This section deals only with the installation of the basic hardware. After completing this section, the user should proceed to CHAPTER 4 to configure the radio, and then proceed as the “Installation Guide” ( CHAPTER 3) describes.

3.3.1 General Guidelines The installation, maintenance, or removal of antenna systems requires qualified, experienced personnel. WitLink-2000® installation instructions have been written for such personnel.


RECOMMENDATION: Before installing the WitLink-2000® system, read this section in its entirety. Installation personnel should be familiar with the system’s components. Read CHAPTER 2, ‘System Description.’ Afterwards, proceed to the relevant section in this chapter.

Since WitLink-2000® is easy to install, a previously installed link can be conveniently moved to a new location. Re-deployment allows the user to meet the requirements of a changing system with minimal effort and expense.

This manual assumes that the site power and grounding have already been installed. This manual also assumes that the antenna mounting pole has been installed prior to undertaking WitLink-2000® installation activities. When installing and aligning a terminal or link of the WitLink-2000® system, the user should always have on hand the required tools, test equipment and any other required miscellaneous installation devices and materials.

RECOMMENDATION: The WitLink-2000® electronics and components have been designed to be as rugged as possible. However, because of continued exposure to weather, it is recommended to inspect antenna systems once a year by qualified personnel to verify proper installation, maintenance, and condition of equipment.

Witcom Ltd. disclaims any liability or responsibility for the results of improper or unsafe installation practices.

3.3.2 Equipment and Unpacking RECOMMENDATION: Retain at least one (1) of each kind of packing carton with all its packing materials. In the event that it is necessary to transport a unit, the user will have the required packing material for safe shipment.

Each WitLink-2000® terminal is shipped in one master box within which are two internal boxes: one houses the IDU, the second contains the ODU. The WitView-EMTM and the User Manual are both provided on a single CD with one of the terminals.

Unpack each box and examine the exterior of each unit for any visible damage. If visible damage is detected, contact your sales representative immediately or Witcom Ltd. directly.

The main equipment (IDU, ODU and antenna) depends on the specific purchase order and the prevailing standards (FCC or ETSI). Verify that you have received the correct main equipment based on Table 1, and ‘APPENDIX C: Frequency Spectrum Allocations.’


3.3.3 Packing Lists Each box contains a main component (IDU or ODU) and accessories. Verify the contents of the cartons with the packing lists. The following sample packing lists are provided for user convenience only. Witcom Ltd. Reserves the right to change the packing list without prior notice.

Item Qty Description

1 1 1U high, 19” rack-mountable IDU.

2 1 DC power connector kit (including 3 pins).

3 1 Short DC power cable (pins already crimped).

4 1 3 A SB fuse (for voltage range of 22-36 V DC)

Table 9. IDU Carton Packing List

Item Qty Part Number Description

1 1 See ‘APPENDIX C: Frequency Spectrum Allocations.’

Outdoor Unit (ODU).

Table 10. ODU Carton Packing List


3.3.4 Installation Tools and Materials

3.3.4.1 Installation Tools The user should have at least the following tools on hand before attempting to install the WitLink-2000® system.

Tools Purpose

Hand-held voltmeter, including adapter for BNC connector

Fine-tuning antenna alignment

Optical aid or compass (optional) For coarse antenna alignment

Flat head screwdriver Tighten DB25 connector

Crimping tool-Molex P/N 11-01-0197 in USA

or Molex P/N 69008-0724 in Europe

For provided DC power connector kit

Tools required by antenna manufacturer Antenna installation

Table 11. Installation Tools

3.3.4.2 Materials It is the user’s responsibility to prepare the following materials:

• Coax Cables: RG-8: up to 300 meters (1000 ft) Nominal Impedance: 50 Ohms Nominal Conductor DCR: 0.9 Ohms/M’

• 2 standard (sealed) N-type connectors.

• Tie wraps (or similar) for cable fastening.

• Lightening protectors (optional). Recommended type: FCC-250B-140-N (Fischer Custom Communications), 800V/200mSec or equivalent.

• Amalgamating tape for moisture prevention.


3.4 Antenna Installation

Install the antenna as defined by the specific antenna manufacturer.

3.5 ODU Installation – Direct Mount

The ODU is an electronics unit that installs flush on the back of the antenna assembly.

WARNING: Failure to follow ODU installation procedure will damage the Antenna Mount Assembly, and may render the radio unusable. Read through the entire procedure before attempting installation. Contact your authorized Witcom Ltd. sales representative or Witcom Ltd. directly with any questions you may have.

It is the obligation of the body vested with the responsibility for full installation, to prevent any contact or induction with mains lines at any voltage.

Perform ODU installation as follows:

Initial Steps

• Install an N-type male connector onto one end of an RG8-type coaxial cable (not supplied). Use a standard installation kit, and follow the connector manufacturer’s instructions. The maximum allowed cable length is 300 meters (1,000 feet).

• Install the coaxial cable, running the connectorized end up the mounting pole.

• Fasten the coaxial cable to the structure at intervals of 10 feet. Leave a minimum of 15 inches of service loop in the coaxial cable where it attaches to the ODU. Avoid tight bendings during cable fastening.

• Carry the ODU to the designated mounting pole.


Polarization

• Mount the ODU onto the Antenna. Observe the “V” or “H” labels on the circumference of the ODU. The “H” label located on the ODU baseplate must point straight upward for horizontal polarization, and the “V” label must point straight upward for vertical polarization.

• Note that both sides of the link must be identically polarized.

Figure 19. Alignment V and H Designators for Polarization


Band Verification

• Verify that the ODU units are properly paired. Band 1 at one terminal must be paired with Band 3 at the other terminal (Alternatively, Band 2 must be paired with Band 4.) For example, ODU-1-1-1-38 at one terminal would be paired with ODU-1-1-3-38 at the other terminal.

Final Steps

• Secure using the four (4) clips on the antenna.

• Connect the coaxial cable with the N male connector to the ODU, then wrap with amalgamating tape to prevent moisture from permeating into the connector.

• Connect the grounding cable (not supplied) to the ODU grounding lug. Use a #8-32x5/16” bolt to fasten the cable termination. This cable will place the ODU at the same electrical potential as the mounting pole. Connect the other end of the cable to a proper grounding point.

Refer to Section 2.2.3.1 for information about Remote 1+0 installation and an example configuration.


3.6 IDU Installation

This section describes IDU installation. The IDU is typically installed in a 19” rack mount. Perform the steps in the following procedure.

STEP IDU Rack Mount Installation Activity

1 Mount the IDU on a rack into its predetermined space. The IDU requires one (1) standard rack space (EIA 1.75 inches) (4.5 cm).

2 Pull the RG-8 coaxial cable installed in Section 3.5 of this chapter down the rack, leaving 18 inches of service loop.

3 Install an N-type male connector onto the free end of the RG-8 coaxial cable. Use a standard installation kit, and follow the connector manufacturer’s instructions.

4 Connect the coaxial cable to the N female connector on the IDU labeled "ODU."

5 GROUNDING: Connect the grounding cable to the Grounding lug provided on the IDU right bracket on the FRONT of the IDU. This cable will place the IDU at the same electrical potential as the wiring closet. Connect the other end of the cable to a proper grounding point.

The following are the definitions for the ground cable and ring terminal of the WitLink-2000’s IDU:

1. Insulated ground cable: Insulation color: Yellow/green, Material: Flexible multi-wire cable made of technical copper. Cross-section area: 6 mm2 Standard: UL94V-0 at least and or tested at VW-1.

2. Ring terminal for this cable: Insulation: None, Material: tin-coated copper with a maximum thickness of 2mm. Bolt: Intended or M5 screw. Star-shaped washer and nut made of stainless steel that is appropriate for M5 screw.


STEP IDU Rack Mount Installation Activity

6

Connect the power to the IDU (22 to 60 VDC). If you are equipped with a proper crimping tool (as specified in Table 11), use the DC power connector kit provided and crimp the pins included in this kit. In the absence of such crimping tool, use the short DC power cable provided, with its pins already crimped. Before making the connection itself, measure DC voltage to confirm its magnitude. Note that the shield of your Rack Cabinet must be connected to the middle pin of the power connector, and the voltage “hot line” to the left-hand pin as labeled on the front panel of the IDU. Refer to Figure 5 for Front Panel and power ODU connections. The voltage can be either positive or negative. The sign means grounded.

WARNING: Use of improper voltage or faulty grounding connection may cause serious injury or equipment damage.

7 Install the tributary DS1/E1/DS3/E3 or 10/100Base-T signal cables onto the IDU Plug-in. If BNC connectors are used, take care to connect the IDU’s Tx to the external equipment’s Rx and the IDU’s Rx to the external equipment’s Tx. If RJ48 connectors are used, refer to ‘APPENDIX B: Interfaces (Pinouts)’ for the correct pinout.

8

Install the alarm I/O cables. Refer to Section 2.2.1.3 for a description. For connector pinouts, refer to ‘APPENDIX B: Interfaces (Pinouts).’ Note that the voltage allowed for each of the alarm inputs is 3.4 – 9 VDC. The polarity of the voltage has no relevancy.

WARNING: Use of improper voltage or faulty grounding connection may cause serious injury or equipment damage.

9 Install the DATA cables (if necessary). Serial RS232/422 asynchronous equipment may be connected at the other side. The DATA port supports text files transfer only. Available parameters: Bit Rate 300 to 19200Bps, Parity Non/Even, Stop bit 1or 2, Data bits 7 or 8 , Flow Control Non/Xon Xoff. Log the parameters in order to configure the IDU to the same values at a later stage. For connector pinouts, refer to ‘APPENDIX B: Interfaces (Pinouts).’

Do not connect the NMS-IN / NMS-OUT and Ethernet ports at this time. These ports should be connected only after performing configuration as described in the following chapter.

NOTE: The ‘TEST’ port is intended for use only by Witcom Ltd. technical personnel.

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CHAPTER 4 Basic Terminal Setup

The user is required to configure WitLink-2000® after the physical installation of the IDU, ODU and antenna. The basic configuration is done using the IDU Control Panel. The user is guided through the main system parameters with the assistance of the Quick Config.

The configuration involves navigation through the IDU Control Panel menus and setting the various parameters. This chapter describes the following procedures:

• Initial power up.

• Initially configuring the WitLink-2000® system using the IDU Control Panel.

This chapter deals only with initial configuration procedures using Quick Config for setting the following parameters on the both terminals:

• Link Capacity

• Tx Frequency (Channel #)

• Channel Spacing/FEC (Available for Ethernet 10/100Base-T PIN only).

• Tx Power

For more advanced configuration issues, refer to CHAPTER 6, “Using the Control Panel,” and the companion manual, ‘WitView-EMTM, SNMP Management System.’


4.1 Power Up

When the IDU is connected to power, the unit is automatically powered up and performs selftest. Initialization messages appear on the Control Panel LCD. At the end a of the sequence, a “Self Test Passed Successfully” message will be displayed, and after then, the following information will be displayed.

Figure 20. Main LCD Screen example

The screen described in the above figure is an example only. The actual values may be different from those displayed above. The main menu is actually a display of information on current Bit Error Rate (BER) 1.0 E-15 value means: No errors. Receive Signal Level (RSL), and Transmit Power Level (PWR) The displayed power level presents the actual working terminal power level.

An alarm screen, over-riding the main LCD screen, may also appear. Since the terminal is not yet configured, you may ignore the performance and alarm messages described above.

4.2 Initial Configuration Procedures

The Quick Config menu is provided to help the user to initialize the link’s connection. It was built for intuitively access with the main important parameters. When the Quick Config is selected on a virgin link, parameters values may already exist. Those values are generally the factory default settings (and may differ from those shown in the screens below). You will be required to modify the data and adapt the parameters to your system.

To perform configuration, the user must have proper authorization to access the system. There are three types of access privileges.

• User (read only)

• Administrator (read and write access, without access to functions that may crash the link)

• Supervisor (full read/write privileges)

B E R 1 . 0 0 0 E - 1 5

R S L - 0 3 1 P W R + 2 0


When an attempt is made to configure the terminal parameters, the system requests for Supervisor authorization (refer to Section 6.2).

To perform initial configuration of the link from the IDU Control Panel, do the following:

Verify the PWR LED on the Control Panel is lit.

Begin with the local terminal. Verify that the local terminal is selected. If the REM LED is lit, press the LOC/REM touchkey once to activate the LOC LED.

The initial LCD screen will show the initial WitLink-2000 Control Panel screens (refer to Section 6.1.4.1). This is the normal condition of the display. Disregard any alarms for now.

Press SEL/SAVE. A “please wait…” message will appear, and after a few seconds the Quick Config screen will be displayed. If not, use the forward and backward arrows to scroll until you arrive at the desired screen.

P L E A S E . W A I T . . .

. . . . . . . . . .

The running dots indicate that the this terminal becomes the Local (master) terminal and from this side its available to configure both sides of the LINK.

Q U I C K . C O N F I G

Figure 21. Quick Config Screen

Press SEL/SAVE. The following message appears:

E N T E R P A S S W O R D

Figure 22. Enter Password Screen

Enter the default password sequence for Supervisor (ESC, ESC, , , ). For subsequent configurations, enter your password. You will now enter the Quick Config menu.


The following message appears:

L i n k C A P A C I T Y

( V A L U E ) *

Figure 23. Link Capacity Screen

Configuring the Link Capacity:

1. If your display does not show “Link Capacity”, press or to change the display so that “Link Display” appears (you may have to press more than once).

2. Press SEL/SAVE to select the Link Capacity option.

3. Use the arrows () to scroll between the parameters until the desired capacity is obtained.

4. Press SEL/SAVE. The “Save to Remote” message appears.

5. Press SEL/SAVE for “yes”.

6. The # symbol appears to show that the new parameters have been saved. (The * sign indicates ‘no change’.)

Proceed to change frequency.

Configuring Frequency

1. Press or to change the “Frequency”.

2. Press SEL/SAVE and to set the frequency as required.

3. When done, the # symbol appears.



6. The # symbol appears to show that the new parameters have been saved. . (The * sign indicates ‘no change’.)

Configuring Channel Spacing with PIN-42042 and PIN-52042

1. Press or to change the “Channel Spacing”.

2. Press SEL/SAVE and to set the channel spacing as required






Configuring Tx Power

1. Press or to change the “Tx Power”.

2. Press SEL/SAVE and to set the Tx power as required





Saving the Configuration

1. Press ESC until asked to save changes (“Update Changes? Yes, No”).


3. The “Update Remote” message appears. Press SEL/SAVE for “yes”.

4. The “2 sides updated” message appears. Press ESC to continue.

5. The ”Write Config, OK” message appears.

6. Press ESC to finish.

Initial configuration has now been completed. If configuration was performed while the other terminal had the power turned off, power up both terminals and verify that the parameters are identically set for both terminals. Only one side at a time can be configured, so if trying to configure with an authorization one side while the other is Password initiated, a ‘Viewing only’ massage will be prompt. Some alarms may appear because the system has not yet been fine-tuned. Verify communication between the terminals (“Shrinking” ‘O’ in the upper right LCD on both terminals).


At this point, fine-tuning may be performed by scrolling through the various parameter groups to set individual parameters that are not included in the Quick Config. Note that all parameters that have been set using Quick Config can be also accessed and set through the Configuration Link menu.

See chapter 6 for detailed explanation.


CHAPTER 5 Antenna Fine Alignment

5.1 Purpose In the previous chapters, the WitLink-2000® Terminals were installed, initial parameters were set and communication established between the terminals. This chapter will describe the fine-tuning procedure of the antenna for maximum transmission and reception capability.

5.2 Antenna Alignment

WARNING: Failure to follow this antenna alignment procedure may damage your equipment and may render the radio unusable. Read through the entire procedure before attempting adjustment. Contact Witcom Ltd. with any questions.

Perform steps 1 - 4 on the local ODU. Then, repeat these steps for the remote ODU.

Step 1. Preliminaries

• Remove the ODUs BNC connector cap. Attach the hand-held voltmeter and BNC test lead to the BNC connector.

Step 2. Azimuth Alignment

This step requires two technicians. One technician to be at the Local site, and the other at the Remote site

The adjustment should be slowly tuned through the maximum voltage, and reset at the absolute maximum. Rotate the Azimuth Fine Adjust bolt of the local antenna until the proper azimuth alignment is achieved (meaning that the RSL voltage is as high as possible, see table 12) for both the Local and the Remote sites.

Repeat the adjustment until the maximum voltage is reached, and then verify that it is stable with similar values for both sites.


Approximate antenna alignment using BNC output voltage

RSL -10 -20 -30 -40 -50 -60 -70 -80 -85 VDC 4.9 4.3 3.8 3.2 2.7 2.1 1.6 1.1 0.8

Table 12. RSL to VDC table

Step 3. Elevation Alignment

• Repeat ‘Azimuth Alignment’ process for Elevation.

NOTE: Alignment for each antenna should be alternated at least twice before confirming the final setting.

Step 4. Radome Panel Rotation (example for an antenna with a ‘Drain Groove’) The ‘Drain Groove’ of the Radome should be pointed downward for drainage purposes. If the Radome Panel requires rotation, loosen the Radome Band Clamp by unscrewing the Radome Band Clamp Locking Nut. Rotate the Radome Panel as desired, ensuring that the Band Clamp Screw Assembly and ‘Drain Groove’ are located on the bottom of the Antenna Assembly. See the diagram below. When finished, fasten the locking nut. NOTE: When performing this procedure, take care not to change the alignment performed in the previous paragraphs.

Figure 24. Radome Panel Position, example of antenna with ‘Drain Groove’

Bottom

Drain

Band Clamp Screw Assembly

Note the location of the:

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CHAPTER 6 Using the Control Panel

This chapter explains how to configure, monitor and control a WitLink-2000® link using the IDU’s Control Panel. As previously written, WitLink-2000® can be configured from WitView-EMTM or from the Control Panel on the IDU Front Panel. The Control Panel contains a 16-character, two-row LCD, which can display the operation mode, configuration parameters and alarm indications of both terminals. The terminals can be configured using five touchkeys on the Control Panel. It is also possible to configure a remote terminal from the local side terminal.

All the Control Panel operations can be performed from NMS software such as the WitLink-2000® Configurator. However, not all NMS software operations can be performed from the Control Panel.

The Control Panel has been designed to provide a tool to perform configuration activities for the local and remote terminals without the need to connect a PC management software to the WitLink-2000® and without the technician required to bring a laptop on site or needing access to a computer.

This chapter contains the information necessary to perform configuration activities of both terminals of a link. It is assumed that the service engineer has read the previous chapters, but basic concepts are reviewed so as to avoid the need for frequent back reference. This chapter is intended for fine-tuning the link. This chapter explains:

• Control Panel Basics

• Control Panel Keys and indications

• Control Panel Operations

6.1 Control Panel Basics

The WitLink-2000® link operating can be configured, monitored, controlled, and receive system messages and indications through the Control Panel, without WitView-EMTM or other NMS software. The Control Panel also shows the status of the local and remote terminals by displaying alarms, statistics and test results. See Figure 4. Control Panel


6.1.1 Control Panel Concept The basic concept of the Control Panel is that the system’s data structure is hierarchically arranged in a sort of tree having main branches, sub-branches and leaves. The user navigates this “tree” (branches, sub-branches) in order to access and modify the parameters (leaves), which together comprise the configuration of the local and remote WitLink-2000® terminals.

Main groups or branches include Quick Config, Configuration, Status and Alarm Log. These main branches or groups are further subdivided into sub-groups of parameters (or sub-branches). Parameters and their values are the lowest level, which are modified from the Control Panel.

When entering a branch of the Configuration Tree, the Group Name is displayed on the top line.

Pressing SEL/SAVE enters the sub-branch of the main configuration branch. The user browses with the forward and backward ( and ) keys until the desired sub-branch is located. Pressing SEL/SAVE enters the sub-branch.

Each parameter within a sub-branch has a Parameter Name and a Parameter Value. The Parameter Name is displayed on the top line of the LCD and the Parameter Value is displayed on the bottom line.

Some parameter values may be modified by scrolling a list of finite values (pre-set either by the system administrator or factory pre-set) and others can be “edited” by modifying the displayed data to a user-customized value.

Some parameters are “dynamic” and can be changed on-the-fly after modifying the individual parameter. Other parameters are “static” and become active only after the entire configuration (which may include several parameters) is updated.

When leaving a branch of the tree, a temporary save is performed by the system. Some parameters may cause messages or alarms to be generated, in which case verification by the operator will be necessary. Finally, an update of all the parameters is performed when exiting the entire tree when SEL/SAVE is pressed.

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NOTE: For a detailed list of all available parameters and factory default values (including sub-menu locations), rrefer to chapter 11 of this manual.

6.1.2 LEDs Control Panel LEDs are provided to show general link status at a glance. The lower portion of the Control Panel contains 15 separate LEDs. Two LEDs (on the right side of the panel) have general link functionality and indicate whether the terminal is powered on and whether the link is operational.


The Display Group of LEDs (on the left side of the Control Panel) shows whether the LCD is receiving messages for the local (LOC) or remote (REM) terminal. The user can select the local or remote terminal by toggling the LOC/REM touchkey.

The LOCAL and REMOTE groups of LEDs show the status of the respective IDU, ODU and Cable (CBL).

Six LEDs show if alarms have been received for the respective terminal (local or remote).

6.1.3 Touchkeys Five touchkeys are used to navigate the data structure of the Control Panel and to configure the terminal.

The parameters of the WitLink-2000® are hierarchically arranged in a menu tree. The Control Panel touchkeys enable navigating up and down the tree’s branches (using the ESC and SEL/SAVE keys), and scrolling through possible parameter groups or parameter values (using the and keys).

6.1.3.1 Forward and backward Keys Two touchkeys, forward and backward ( ), enable scrolling through possible parameter groups or parameter values. Continuously pressing the forward and backward ( )keys will scroll fast forward or fast backward. Generally, scrolling is cyclic, except when editing individual characters (refer below). Scrolling in various situations is summarized as follows:

• Scroll cyclically, forward and backward, among all the parameter groups (scrolling through tree branches).

• Scroll cyclically, forward and backward, among all the leaves of the current branch (group), i.e., arriving at a parameter and immediately viewing its name and value.

• Scroll cyclically, forward and backward, among all the possible values of a selected list (for editing).


6.1.3.2 SEL/SAVE Key The SEL/SAVE key is usually used to initiate an editing session from the Control Panel’s Main Screen. The SEL/SAVE key is also used to select a parameter group (branch). During an editing session, this key is used to choose from a list of pre-defined possible values or from a list of indexed parameters. It also enables to confirm some of the messages.

6.1.3.3 ESC Key The ESC key is used in the following cases:

• Moves up through the tree’s leaves to the next higher branch and up to the LCD’s main menu.

• Quickly exiting from editing a parameter value character-by-character. The ESC key can be used when some of the characters of such a parameter have been modified and the user does not need to advance the cursor up to the parameter’s last character. In that case, the user can save the new value by answering YES to the confirmation message.

Continuously pressing the ESC key will move directly to the top of the tree, without having to move up through each individual “leaf.”

6.1.3.4 LOC/REM Key The LOC/REM touchkey determines whether the LCD indication and parameter configuration apply to the local or remote terminal. The LOC/REM LEDs indicate which terminal is currently selected. The LOC/REM key cannot be activated from within the data tree, but only from the on-line main menu.

6.1.4 LCD Display The Liquid Crystal Display (LCD) has a sixteen character, two row display on which all messages appear (one at a time). The LCD is used to show the following types of messages:

• Current Operation

• Alarm

• Self-test

• Configuration

• Communication


6.1.4.1 Current Operation Message (Main LCD Screen)

The main LCD screen provides status information about the current Bit Error Rate (BER), Receive Signal Level (RSL) and Transmit Power Level (PWR).

The following figure shows a sample main LCD screen:

B E R 1 . 0 0 0 E - 1 5 0

R S L - 0 3 1 P W R + 2 0

Figure 25. Main LCD Screen

Pressing SEL/SAVE from this screen will go down the configuration tree and initiate an editing session.

6.1.4.2 Alarm Messages Because of the potential importance of alarms for current operations, alarm messages take priority over all other LCD screens.

If an alarm message has been received, it will override the main LCD screen. A sample alarm screen is shown in the following figure.

Figure 26. Sample Alarm Screen

The message will always relate to the most recent alarm detected. The WitLink-2000® is capable of accumulating up to the last 15 alarm events. To view the alarms, the user must enter the Alarm Log branch. Pressing on the SEL/SAVE key will start an editing session by entering the menu tree. Pressing on the ESC key will return to the Main LCD Screen.

6.1.4.3 Self-Test Messages After a power-on, hard reset, or self-test activation, the “SELF-TEST” running message will appear on the LCD. If a specific test has failed, then the system will display a “SELF-TEST” failed message and wait for the operator’s confirmation.

If the “SELF-TEST” passed successfully, an appropriate message will be displayed for a few seconds, and then the Main LCD Screen will automatically open.

T E L E M E T R Y F A I L .

L O C 0 1 : 4 6 : 2 2


6.1.4.4 Configuration Messages Configuration involves parameters that apply to an individual terminal and parameters that pertain to both terminals (local and remote terminals). During configuration, if the user has changed a parameter that pertains to both terminals of the link, he is prompted to apply configuration modifications to the other terminal too.

6.1.4.5 Communication Messages When communication problems with the remote terminal over the link, or with the Outdoor Unit over the coax cable occur, remote parameters can be unavailable and “Communication Timeout” messages display.

If the Remote Side becomes unavailable during an editing session, the current session must be terminated and a new editing session attempted later.

6.1.4.6 Flags When using the Control Panel, the user must distinguish between the symbols that are used as flags to indicate various parameter conditions. Active Values of parameters – those with which the Terminal is currently working – are indicated by the asterisk symbol (*).

The figure below shows the active channel number indicated by an asterisk.

F r e q u e n c y ( C h # )

2 2 7 0 0 . 0 0 ( 1 2 0 0 ) *

Figure 27. Active Value: *

Parameters that have been saved, but which have not yet been activated as current are indicated by the pound symbol (#). These parameters are stored in a temporary memory. The user will be asked to confirm the activation of these parameters in a later stage of the editing session. The figure below shows the channel number indicated with a # symbol, i.e., a temporarily saved value that has not yet been activated.

F r e q u e n c y ( C h # )

2 2 7 0 4 . 0 0 ( 1 2 1 6 ) #

Figure 28. Configured Value: #


6.1.4.7 Types of Parameters There are several types of parameters: read/write, read only or operation parameters. The Read/Write parameters type are classified to:

• Action parameters type

• Static parameters type

Action Parameters are configurable values that are instantaneously effective on the running WitLink-2000® system and not updated and saved in the system configuration. A typical example for this type of parameter is the ‘System’ (Non/Terminal Reset/Term Switchover/IDU Switchover/ODU Switchover) under the sub menu ‘Configuration\Operation’.

Static Parameters are saved in the temporary IDU memory until the “Update Configuration” operation occurs. After then the updated configuration become active. A typical example for this type of parameter is the, ‘Tx Power’ under the sub menu ‘Configuration\Link’.

Read/write parameters can either be selected from a pre-defined system list or a parameter that can be edited character-by-character. An example of a list-type of parameter is the ‘Link Capacity’. An example of a character-by-character edited parameter is the ‘IP Address’.

6.1.4.8 Types of Values Parameter fields require entering different types of values, depending on the parameter. These values may be integer or IP-type characters.

Integer Values

Integer values are generally displayed in decimal format (some may be hexadecimal). Numbers may be positive or negative. The +/- sign can also be modified when necessary (Tx in dBm values for instance).

The number of digits displayed is automatically determined to enable setting the parameter to values within the Min-Max value range defined for that parameter.

For a read/write leaf, the number is modified by successively editing each digit of the number.

IP Addresses

When the on-the-fly parameters are modified, the system prompts the user to activate the modification immediately. IP Addresses are an example of such a parameter.

IP addresses and IP Subnet Mask definitions are always displayed in the following standard format (four bytes in decimal format, separated by a period):

000.000.000.000

and where each byte value is in the [0,255] interval.


These parameters are edited by successively editing each of the digits. The IPs can be on-line modified without any effect on the Link continuous operation (Warm reset).

6.1.4.9 Reset Operations The Terminal can be manually reset by software or hardware. Software reset is performed via the IDU control panel: ‘System Reset’ (Cold reset), or by pressing the IDU reset pushbutton (Hardware reset). Some of the parameters updates will automatically perform a reset after modification, as ‘Link capacity’ for instance.

The Factory Default configuration is a fixed manufacturer setting of parameters values that can be useful for initial operation of a virgin terminal. (Refer to the Factory Default configurations in chapter 11, “Appendices”). This WitLink-2000® System option might be helpful when the Link is down because of mismatch with the configuration programming. Generally, a new WitLink-2000® system is supplied with its virgin ‘Factory Default’ parameters.


6.2 Entering the Control Panel

As a precaution, access to the system is limited by password. Any attempt to read or change parameters from the Control Panel will activate a screen requesting the appropriate password. There are three types of access privileges.

• User (read only)

• Administrator (read and write access, but no functions that may crash the link)

• Supervisor (full read/write privileges).

The following table shows the factory set passwords for accessing the Control Panel:

Authorization Level

Touchkeys

User: ESC ESC ESC ESC ESC

Administrator: ESC ESC SEL/SAVE

SEL/SAVE

SEL/SAVE

Supervisor: ESC ESC

A screen such as the following will appear when attempting to access Control Panel screens.

E N T E R P A S S W O R D

Figure 29. Enter Password Screen

Read only screens are protected at the “User” authorization level. Verify that you have the appropriate authorization before attempting to change parameters. The default passwords can be modified using the WitView-EMTM application.


6.3 Control Panel Operation

6.3.1 Configuration Editing Session Overview After the WitLink-2000® system has been powered ON and completed its initialization process, the Control Panel shows the Main Menu Screen.

6.3.1.1 Step 1: Terminal Selection Before starting an editing session, press the LOC/REM Control Panel key, while the main menu screen is being displayed. This is to select the local or remote terminal whose configuration is to be viewed/edited.

6.3.1.2 Step 2: Starting the Editing Session When the Control Panel SEL/SAVE key is pressed from the main LCD screen, a Control Panel editing session is started.

The system copies the Active Configuration of the currently selected terminal to the Image Configuration Area (RAM) of the Front Panel, enabling the user to browse the Configuration Tree and edit parameters.

Scrolling “horizontally” through tree branches at the same level is done using the forward and backward arrows. SEL/SAVE is used to select a branch and or choose a sub-branch from within a branch. Clicking SEL/SAVE on any sub-branch will open the parameters of that sub-branch. When a parameter is displayed, clicking SEL/SAVE will activate edit mode for that parameter. ESC is used to exit the edit mode and “climb” up the tree up to the highest level (Main Menu).

6.3.1.3 Step 3 - Ending a Control Panel Editing Session

To end a Control Panel editing session and return to the main branch of the configuration tree, successively press the ESC key.

If at least one parameter value has been modified, the user is prompted to activate the new configuration, with the update confirmation message.

U p d a t e C h A n g e s ?

( Y E S / N O )

Figure 30. Configuration Changed Message

If the user selects “YES” (with the arrow keys) and confirms with the SEL/SAVE key, then the new configuration (which includes all the modifications) that has been saved in temporary image memory (RAM) of the Front Panel, is immediately activated.

If “NO”, then the system enables the user either to continue the editing session or exit. If the user exits at this point, then all previously-made changes are erased.


Some parameters apply to both terminals. When the user is prompted to save a parameter, if this parameter is a “Link-Specific” parameter (which means both terminals should be simultaneously set to the same value), then the following message appears.

U p d a t e 2 S i d e s ?

( Y E S / N O )

Figure 31. Update 2 Sides Screen

• Some parameter changes may cause system reset when activated (modification will cause reset of the tributary lines).

• As mentioned earlier in this manual, on-the-fly parameters behave differently. The user is prompted to activate on-the-fly parameters immediately upon exiting the editing parameter screen.

• To save the configuration, the user is required to return to the main branch of the Configuration tree by successively pressing the ESC key as described at the beginning of this section.

6.3.1.4 How to Select Values from a List Values for some parameters can be selected from a predefined list. The Link Capacity parameter is an example. From the Configuration branch, press SEL/SAVE and scroll to the LINK sub-branch using the forward and backward ( and ) keys. Press SEL/SAVE again, and scroll to the Link Capacity parameter. Press SEL/SAVE, the first digit in the second row will be underlined. Using the forward and backward ( and ) keys, scroll until you arrive at the desired value. Press ESC to go up the configuration tree.

6.3.1.5 How to Edit Character-by-Character Parameters

Some of the parameters can be edited on a character-by-character basis. The Link ID parameter is an example. To access this parameter, press SEL/SAVE from the Configuration branch. Press SEL/SAVE again for the LINK sub-branch.

Press SEL/SAVE, and scroll to the Link ID parameter. Press SEL/SAVE again to enter the editing mode. The first character in the second row will be underlined. Use the and keys to scroll from 0 to 9. Press SEL/SAVE, and the underline will move to the second character. Edit this parameter in the same manner. Continue with the same for all next characters.

When finished, press ESC to go up the Configuration tree.

6.3.2 ATPC, Tx Mute and Switch-Over features ATPC

Each terminal of a link controls the transport level of the other terminal to ensure transmission within its own preset receive level. The purpose of Automatic Transmitter Power Control (ATPC) is to make the transmit power more efficient relative to specific site conditions. The


concept is based on obtaining the measured Tx and the RSL values of both terminals and calculating the differences between the measured power of each (dBm). The algorithm then decides whether to increase or decrease the Tx value of the other terminal to comply with the preset RSL value of the first terminal. The Control Panel parameters that deal with the ATPC are ‘ATPC Control’, ‘RSL Optimal’, ‘RSL Upper Thr.’, ‘RSL Lower Thr’, which are located under the ‘Configuration\Link’ submenu. It is recommended to configure at least 5dB difference between the Upper, Optimal and Lower RSL parameters.

Tx Mute

The purpose of Tx Mute is mainly for Link diagnostics and testing verification. The Control Panel parameters are: ‘Tx Mute’, ‘Pause Tx control’ and ‘Pause Tx period’. The pause Tx mechanism activates the Tx Mute for an predefined time, which is set using the ‘Pause Tx period’ parameter (up to 36000 sec. With a default time of 600 sec.).

Switch Over

The IDU as well as the ODU includes 2 memory ‘Banks’ to hold the WitLink-2000® firmware; each be switched to the active running software. After the Switch Over operation, the terminal automatically boots up with a Cold reset. The Switch Over parameter is: ‘System’ (Term Switchover/IDU Switchover/ODU Switchover) under the sub menu ‘Configuration\Operation’.

6.3.3 Alarm Browsing Using the Touchkeys

In the ALARM LOG menu, the touchkeys function somewhat differently than in other Control Panel menus because of the added capability to erase alarms from the queue. Following is a description of touchkey operation in the Alarms Menu:

Key Function

Browse next alarm (cyclically). This key does not erase the alarm from the ALARM LOG queue!

Browse previous alarm (cyclically).

SEL/SAVE Erases the alarm from the ALARM LOG queue.

The message, “Alarm Log Empty” appears when all of the alarms have been erased.

ESC Exits alarm browsing.

For all alarms, a time stamp (in minutes) is displayed on the second row of the LCD.

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NOTE: Viewing the Alarm log in the remote terminal is not available since each of the terminals reports the Local and the Remote sides problems, and these can be viewed only by the Local terminal. In addition, each Alarm massage contains its Rem or Loc prefix.


CHAPTER 7 Software Key

7.1 General

The object of the Software Key (SW Key) is to configure the IDU to accommodate the customers’ varying bandwidth necessities. The IDU is shipped with various types of plug-in units. Customers that do not require the full capacity of the IDU plug-in unit can order lower link capacities at reduced cost while they maintain the option for future growth. For example, the customer may order an IDU with 4 operable ports. The IDU will be factory-configured to support 4 ports even though the plug-in unit may actually feature 16 ports. The additional 12 ports are locked, but can set to operate at any time, according to the customer’s requirements. This is performed with the aid of the SW Key.

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NOTE: Only a Supervisor with full read/write privileges is authorized to modify port capacity.

7.2 Changing IDU Port Capability

In order to change the IDU capabilities, the supervisor must acquire a 5-digit SW Key from the factory and then enter it via the Control Panel touch keys.

To update the IDU capabilities, the Supervisor must perform the following:

1. Locate the IDU Serial Number in the back of the machine.

2. Request a new SW Key to modify the port capacity.

3. Apply the new SW Key, received from the factory, to the unit as follow:

3.1. In the Control Panel, scroll using or until Configuration is displayed.

3.2. Press SEL/SAVE to select Configuration.

3.3. Scroll using or until Operations is displayed.

3.4. Press SEL/SAVE to select Operation.

3.5. Scroll using or until SW Key is displayed.

3.6. Press SEL/SAVE to select SW Key and commence entering the first of the 5 digits.


3.7. Use or to display the digit.

3.8. Press SEL/SAVE to select the digit and continue to the next digit.

3.9. Continue scrolling and selecting until all the five digits are displayed.

3.10. Press SEL/SAVE to display the new capacity in the last LCD. (If an error occurred, Invalid Value will appear. Press ESC to continue.).

3.11. Press ESC until Update Changes is displayed.

3.12. Press Y (Yes). The display will show Changes Updated OK.

3.13. Continue to press ESC to exit from menu.

i

NOTE: It is possible to replace plug-in modules with different terminal capabilities; however, the SW Key must be invoked in order to accommodate any change.

7.3 Link Capacity Options

The following is the list of enabled capacities that can be provided through the use of the SW Key and relevant plug-in units.

7.3.1 Plug in PDH

Max Link Capacity ETSI FCC

1 4E1 (support 2E1 to 4E1) 4T1 (support 2T1 to 4T1)



4 E3+1E1 (support E3 to E3+1E1) T3 (support T3)

5 N/A T3+4T1 (support T3 to T3+4T1)

7 Support all capacities Support all capacities


CHAPTER 8 WitLink-2000® 1+1 Protected Configuration System

8.1 General

Protected systems are used to improve link reliability and availability. The WitLink-2000® protected system may operate with one or two antennas in the Hot Standby mode, depending on the customer’s requirements:

8.1.1 Hot Standby Mode In the hot standby mode, both terminals are set to the same frequency, but one terminal’s transmitter is muted to prevent interference.

The Redundant Switch Unit (RSU) provides a connection between the two IDUs, each of which connects to an ODU. This arrangement is similar for both single and dual antenna configurations.

Figure 32. Protected WitLink-2000® Terminal Redundant Switching Unit + 2 * IDUs


The ODUs may be assembled in one of the following mechanical configurations for the Hot Standby mode:

1. Dual ODU / Single Antenna This configuration contains a single antenna with a waveguide coupler connected to

two ODUs.

Figure 33. Dual ODU / Single Antenna

i

NOTE: The primary terminal is connected directly to the coupler (no attenuation). The secondary terminal is connected to the coupler’s sideway outlet (with 6 dB attenuation). (The total coupling attenuation between the primary and the secondary links will be 6dB).

2. Dual ODU / Dual Antenna Each of the two ODUs has its own antenna.

Figure 34. Dual ODU / Dual Antenna


8.2 Operation

8.2.1 Hot Standby Mode In the Hot Standby mode, each ODU has transmit and receive capability (Tx/Rx). One ODU is active (transmits and receives). The other ODU has its transmit mode muted, and only its receive mode is active.

When there is a problem with the active terminal, the ODU’s transmitter goes mute, and the “backup” terminal begins to transmit instead. In the hot standby configuration, the active link begins to transmit in the same frequency as that of the original frequency.

8.2.2 Switching Conditions The protected system provides link continuity in the event that a fault occurs in the primary link. The switch is activated by an alarm condition in a terminal of the primary link. (For more information about alarms, refer to the companion manual, ‘WitView-EMTM, SNMP Management System.’ The terminal with the alarm condition signals the alternate terminal that it has a problem. The alternate terminal decides (using a smart software algorithm) whether to take control. Taking control involves signaling the Redundant Switching Unit (RSU) to switch the traffic relays so the traffic is delivered using the alternate link.

The following alarm conditions will automatically trigger a switch from primary to alternate terminal:

1. DC power loss

2. Modem/Mux or any other link failure alarm

3. Frame loss (Receive)

4. Loss of lock on transmit signal

5. Loss of transmit power

6. RSL alarm (Passing the RSL lower threshold level)

7. BER alarm (Passing the BER upper threshold level)

8. Telemetry fail (between IDU and ODU)


8.3 The WitLink-2000® Redundant Switching Unit

WitLink-2000® supports the Hot Standby mode, as discussed in Section 8.1, with no single point of failure. Redundancy is achieved by connecting the tributary input lines in parallel to two WitLink-2000® systems. Automatic or manual switching is performed according to criteria depending on link status, RSL, BER, etc. as described in section 7.2.2

Each of the two protected terminals is built with the following units: 2 IDUs, 1 Redundant Switching Unit (RSU), 2 ODUs and one or two antennas. A Redundant Switching Unit (RSU) with a suitable tributary interface is used (the plug-in concept is similar to that used in the IDUs), and it corresponds to the type of interface used with the IDUs. The RSUs are backup powered by each of the IDUs.

Switching decisions are made according to the alarms produced in each IDU. A defective IDU can be easily removed without affecting the operating link and replaced with no maintenance down time. (This involves the removal of the Lower or Upper Interconnect Unit connection and removal/installation of a new IDU). The two IDUs are connected to two ODUs via two coaxial cables.

Figure 35. WitLink-2000® Redundant Switch Unit - RSU (Connections)


8.3.1 Redundant Switch Unit LEDs There are five interactive touchkeys located on the Control Panel. These LEDs indicate the touchkeys’ functionality (whether active or not). The AUTO/MAN touchkey is generally set to automatic mode. In AUTO mode, the LED is lit. MAN or manual mode is generally used for maintenance purposes. In MAN mode, the LED is not lit.

In addition, there are four LEDs that indicate the IDU’s status (FAIL/ACTIVE).

Note The user must enter a password (through the IDU LCD touchkey panel) to make the touchkeys functional (refer to section 6.2).

The Touchkeys and LEDs on the WitLink-2000® Protection System provide the following functionality:

Figure 36. WitLink-2000® LEDs and Touchkeys

Touchkeys (each is equipped with an indication LED): UPPER Set the Upper Terminal as the active terminal AUTO Set the switch option to AUTO operation (for status and proper functionality) LOWER Set the Lower Terminal as the active terminal FREQ DIV For future use HOT STBY Sets to Hot Standby mode

LEDs FAIL Red LED will turn on when the Upper Terminal has a fault ACTIVE Green will turn on when the Upper Terminal is active FAIL Red LED will turn on when the Lower Terminal has a fault ACTIVE Green will turn on when the Lower Terminal is active


8.3.2 Protected IDU Plug-Ins The WitLink-2000® IDU uses protected Plug-Ins. The upper and lower IDU interconnection units are used to interconnect between the RSU (where all tributaries are connected to the RSU Plug-In) and the upper/lower IDUs (using protected plug-ins).

The following types of protected IDU Plug-ins are currently available:

Figure 37. IDU Protected Plug-Ins.

Description Witcom Ltd. Part Number

E3 + 16xE1 PIN-23161

DS3 + 16xDS1 PIN-13161

8.4 Protected Configuration Options

A protected configuration typically consists of redundant IDUs and ODUs and a waveguide (coupler is included) to connect the two ODUs to a single antenna port (dual ODU/Single Antenna configuration). If desired, a second antenna may be used instead of the waveguide. This configuration provides protection against an antenna falling out of alignment (dual ODU/dual antenna configuration).


8.4.1 Dual ODU/Single Antenna Configuration

8.4.1.1 Electrical Configuration The waveguide assembly combines the outputs and inputs of two standard WitLink-2000® ODUs to a single antenna using an unequal 6 dB waveguide (coupler is included). The insertion loss through the primary path is typically 1.5 dB for the coupler, plus losses due to any flexible waveguide and circular-to-rectangular waveguide transitions used to connect the ODU assembly and the remotely mounted antenna.


Frequency Waveguide Primary Path

Insertion Loss

Standby Path

Insertion Loss

15 GHz WR-62 1.5 dB 6.25 dB

18/23/26 GHz

WR42 1.8 dB 6.5 dB

38 GHz WR28 2.0 dB 6.5 dB

Table 13. Dual ODU/Single Antenna Path Losses with 6 dB Coupler

Example of 1+1 ODU Assembly + Bracket


8.4.2 Mechanical Configuration The mechanical configurations for a typical installation are shown in Figure 38 and Figure 39. The WitLink-2000® ODUs attach to the dual ODU mast mount using screws. The Dual ODU/Dual antenna configuration employs two of the Single ODU/Single antenna arrangements typically used in an unprotected system.

8.4.2.1 Dual ODU/Single Antenna Configuration The flexible waveguide needed to connect between the ODU assembly and the remotely mounted antenna is not included in the assembly kit and is dependent upon the user’s installation arrangement. A flexible waveguide can be purchased from many sources.

The rigid waveguide components associated with the splitter/coupler and the necessary circular-to-rectangular transitions are supplied as part of the Dual ODU Remote Mounting Kit.

Figure 38. Dual ODU /Single Antenna Mechanical Configuration

Flexible Waveguide

Cable to Upper ODU

Cable to Lower ODU

Rigid Waveguide with

splitter/coupler

ODU Protected Assembly (OPA)


8.4.3 Dual ODU/Dual Antenna Configuration In dual ODU / dual antenna configurations, each ODU is connected to its respective antenna.

Figure 39. Dual ODU /Dual Antenna Mechanical Configuration


8.5 System Installation

8.5.1 General This section covers only procedures unique to installing a protected system. Where necessary, there is reference to the WitLink-2000® User Manual (Installation) for specific guidelines on how to install cables, ODUs and IDUs.

8.5.2 Installation Equipment Required

8.5.2.1 Tools The user should have at least the following tools on hand before attempting to install the WitLink-2000® system.

Tools Purpose

Antenna installation tools as required by the OEM.

Antenna installation

Hand-held voltmeter, including adapter for BNC connector

Fine-tuning antenna alignment

Optical aid or compass (optional) For coarse antenna alignment

Flat head screwdriver Tighten DB25 connector

Table 14. Installation Tool

8.5.2.2 Materials The user should prepare the following materials:

• 4 standard (sealed) N-type connectors.

• Tie wraps (or similar) for cable fastening.

• Lightening protectors (optional).

• Amalgamating tape for moisture prevention.

• Four Coax Cables: RG-8: up to300 meters (1000 ft) each.

• 2 flexible waveguides with the required length and frequency (dual ODU/Single Antenna configuration only).


8.5.3 WitLink-2000® Radio Equipment Inventory An inventory of radio components to be installed should be taken before installation begins. Ensure the parts description detailed on the outside of each box corresponds to the components required for the installation (i.e., ODU frequency band, channel spacing and IDU configuration). If there are any discrepancies, contact the Witcom Ltd. customer support department.

Protected Terminal Configuration with Two Antennas (an example)

Figure 40. System Configuration (per protected terminal), Two Antennas Protected Radio

Item Description Notes Qty

1 Indoor Unit (IDU) 2

2 IDU Plug-In, Protected 2

3 Redundancy Switch Unit (RSU)

1

4 Outdoor Unit (ODU) 2

5 Antenna 2

6 Coaxial Cable 2

7 N Type Connector 4

8 Power Supply Optional. Used separately only when DC power is not available.

2

9 Lightening Protector Optional. 1


Protected Terminal Configuration with One Antenna (an example)

Figure 41. System Configuration (per protected terminal), One Antenna Protected Radio

Item Description Notes Qty

1 Indoor Unit (IDU) 2 2 IDU Plug-In, Protected 2 3 Redundancy Switch Unit

(RSU) 2

4 ODU protected assembly (OPA)

1

5 Outdoor Unit 2 6 Antenna 1 7 Coax Cable 2 8 N Type Connector 4 9 Power Supply Optional. Used only when DC power is

not available 2

10

Lightening Protector Optional. 2

11

Flexible Waveguide Length as required 1



8.5.3.1 Redundancy Kits Redundancy Kits are used to complete a protected terminal (1+1). They are designated as a One or Two Antenna configuration. They include the Redundant Switch Unit (RSU), and the Upper and Lower assemblies used to interconnect the RSU with the IDUs. The ODU Protected Assembly (OPA) with an RF Coupler is required for the One Antenna configuration only.

The following part list for the 1+1 details all Redundant Kit components.

Redundancy Kit, DSX/CEPT, One Antenna, 13, 15, 18, 23, 38 GHz

Witcom Ltd. Part Number

Notes

Redundancy Kit, DSX/CEPT, One Antenna

RDK-X2161-C-F-ANT X=FCC / ETSI

F=Frequency

Includes the following:

Redundancy Switch Unit Kit (Qty 1) RSU

ODU Protection Assembly OPA- F-C F=Frequency

Redundancy Kit, DSX/CEPT, Two Antennas, FCC / ETSI

Witcom Ltd. Part Number

Notes

Redundancy Kit, DSX/CEPT, Two Antennas

RDK-X2161-2ANT X=FCC / ETSI

Includes the following:

Redundancy Switch Unit Kit (Qty 1) RSU


8.5.3.2 Redundant Switch Unit Installation Kit

Figure 42. RSU, Redundant Interconnection Units, IDUs

Item Qty Description

1 1 IDU assembly

2 1 Redundant Switch Unit (RSU) assembly

3 1 Plug-in assembly for IDU

4 1 Plug-in assembly for RSU

5 1 Left spacer plate

6 1 Bracket (PM2030801)

7 2 Guide spacer

10 1 Bridge 1 (PM2030301)

11 1 Bridge 2 (PM2030401)

13 14 Screw lock (F-SCHV-1)

14 1 Screw M4x8, Pan head, PH

17 3 Flat washer, M4

19 3 Screw M4x8, Pan head, PH

20 1 Right spacer plate

21 1 Captive house

22 1 Captive screw Table 15. Redundant Switch Unit Installation Kit Parts List (example)

Note: The Two Upper/Lower IDUs and 2 protected Plug-Ins are provided separately.


8.5.4 Dual ODU / Single Antenna - Mast Mount Installation (Refer to Dual ODU / Single Antenna Installation Kit)

Step 1. Remove the ODU Protection Assembly (OPA) kit from the transport box.

Step 2. Use a flexible waveguide (with the required length) that complies with the frequency used (WR-62 for 15GHz, WR-42 for 18/23/26 GHz, WR-28 for 38 GHz).

Step 3. Install the antenna mount according to the manufacturer’s instructions.

Step 4. Install the ODU Protected Assembly (OPA) on the mast beneath the antenna.

Step 5. Connect the flexible waveguide to the coupler on the OPA using 4 screws, 4 flat washers, and 4 washer springs (provided in the installation kit).

Step 6. Attach one end of the flex waveguide to the antenna using the NC 4 x ½ Allen bolts.

Step 7. Attach both ODUs on the OPA mount using eight screws, ensuring that ODU polarization is vertical, i.e., with the ODU polarization indicator positioned relative to the orientation of the rectangular waveguide and coupler.

Step 8. Lay-in, secure with cable ties and terminate grounds between both ODUs and a nearby local earth point. Use the lock nuts provided on the ODU grounding posts to secure ground connection. Tighten nuts using a small adjustable wrench.

Step 9. Connect two coax cables to the ODUs.


Figure 43. ODU Mounting Bracket Assemblies

Step 10. If necessary, weatherproof, ground and pressurize the waveguide connections at the ODU and antenna ends of the waveguide run. This activity should comply with local engineering practice.

8.5.5 Cable Installation Two cable runs are all that is required to connect ODUs to IDUs in WitLink-2000® protected systems.

8.5.6 IDU and Redundant Switch Unit Installation The protected WitLink-2000® IDUs and protection switches require only an 11.8 inch rack depth and a 3U vertical 19” rack space.

Mast Mount Bolts

Mast Mounting

Mast Mount Bolts

OPA Assembly Mast Mounting


8.5.6.1 Installation Procedure for the IDU and the RSU Installation (Refer to the item designators in Table 15, in Section 8.5.3.2, “Redundant Switch Unit Installation Kit.”)

Step 1. Prepare the rack space with a support tray, coaxial cables from the ODU, ground wires, RG45 Ethernet connections and DC Power source or 48 VDC. See Connections in Section 2.2.1.5.

Step 2. Install each IDU in a rack with a 1U space between them.

Step 3. Position the Redundant System Units (RSU) between the IDUs as shown in the figure so they will be in the same front line.

Step 4. Connect the left spacer plate (3) using three M4 screws (8), flat washers (6) and spring washer (7). At this stage, do not tightly fasten.

Step 5. Release the three nuts and washers from the IDUs and RSU right ears.

Step 6. Connect the right spacer plate (5) to the IDUs and RSU right ear using the nuts, flat and spring washers.

Step 7. Connect the two IDUs and the RSU to the rack tracks and fasten using the rack screws.

Step 8. Connect the two brackets to their positions using the two built in screws.

Step 9. Assemble the Interconnect Assembly - Upper (10) to its place (see figure 38). This action should be performed with maximum care. Apply symmetrical pressure to avoid bending connector pins.

Step 10. Assemble the Interconnect Assembly Lower (11) using the built in caption screws to its place (see figure 38). This action should be performed with maximum care. Apply symmetrical pressure to avoid bending connector pins. After then make the rack mount side brackets tighten to keep the IDUs and RSU alignment.

Step 11. Connect the cable from the lower ODU closest to the coupler flange to the lower IDU and cable from upper ODU farthest from coupler flange to the upper IDU. This provides the least amount of insertion loss to the primary side (In a dual ODU/single antenna application).

Step 12. Install the tributary data signal cables on the middle row of the RSU tributary connectors using 75Ω BNC male connectors for unbalanced systems (E3 or DS3) and RJ-45 plugs for balanced systems (E1 or DS1s).

Step 13. Connect the grounding cable to the stub provided on the IDUs and RSU right brackets on the FRONT of the IDUs and RSU. Use the star washers when connecting the ring terminal.


This cable will place the IDUs and RSU at the same electrical potential as the wiring closet. Connect the other end of the cable to a proper grounding point.

The following are the definitions for the ground cable and ring terminal of the WitLink-2000® IDUs and RSU:

1. Insulated ground cable: Insulation color: Yellow/green; Material: flexible multi-wire cable made of technical copper; Cross-section area: 6 mm2; Standard: UL94V-0 at least and or tested at VW-1.

2. Ring terminal for this cable: Insulation: None; Material: tin-coated copper with a maximum thickness of 2mm; Bolt: intended for M5 screw, star-shaped washer and nut made of stainless steel that is appropriate for M5 screw.

Step 14. Connect the power to both of the IDUs (22 to 60 VDC). If you are equipped with a proper crimping tool, use the DC power connector kit provided in the IDU packing box and crimp the pins included in this kit. In the absence of such crimping tool, use the short DC power cable provided, with its pins already crimped. Before making the connection itself, measure DC voltage to confirm its magnitude. Note that the shield of your Rack 5 Cabinet must be connected to the middle pin of the power connector, and the voltage “hot line” to the left-hand pin as labeled on the front panel of the IDUs. Refer to Figure 5 for Front Panel and power ODU connections. The voltage can be either positive or negative. The symbol means grounded.

WARNING: Use of an improper voltage or a faulty ground connection may cause serious injury or equipment damage.

The WitLink-2000® Protected System is now installed.


8.5.7 Commissioning the Protected System Before applying power to the system, verify that all cables are properly connected and that the Lower Interconnect Assembly and Upper Interconnect Assembly are properly inserted in place.

8.5.8 Hot Standby Protection Mode This manual should be used as a general guide, however, the following specific instructions apply and should be read first:

1. Verify that all interconnect cables are installed.

2. Power up both IDUs.

3. Access the Upper IDU LCD Front Panel, and configure the basic parameters using

the Quick Config (See Chapter 4)

4. Access the Lower IDU LCD Front Panel, and run Quick Config.

5. Without logging out from the LCD password protected menu, choose the primary

terminal and the Hot Standby mode (Hot Stby) from the RSU panel.

6. Align the antenna using the guidelines given in WitLink-2000® (See Chapter 5).

7. Assure proper operation of both links (primary and secondary), by selecting

upper/lower touchkeys on the RSU panel.

8. Select the “Auto” function on the RSU Front Panel.

9. The link and power LEDs for the upper and lower IDU should be solid green. The

Auto, Hot Stby, active IDU and the primary IDU LEDs for the RSU should be also

green.

Repeat steps 1 to 9 in order to configure the second side.

The Hot Standby Protected System is now ready to carry traffic.


8.5.8.1 Parameter rules in Hot Standby Mode Setting the Protected Terminal parameters requires the user to follow some basic rules. Setting configuration parameters requires the configuration indicated in the table below.

“Identical” indicates that the IDUs of the same protected terminal should be configured identically for the specific parameters.

Table 16.Protected Terminal Parameter Setting Requirements

Each Protected Terminal shall be configured according to the above table. In addition to the requirements stated in the table, it is necessary to verify that the link terminals’ (Remote and Local) parameters are comply with the WitLink-2000® parameters requirement (Link ID, Link Capacity, and Frequency and Channel should be identical on both sides of the Link).

Parameter Hot Standby Mode

Link ID Identical

Link Capacity Identical

Frequency (Ch #) Identical

Tx Power Installation requirements

DS3/E3 Cable Length Cable Length

ETH IP Address & Mask Different

NMS IN IP Address & Mask Identical

NMS IN Dest IP Address & Mask Identical

NMS OUT IP Address & Mask Identical

NMS OUT Dest IP Address & Mask Identical

LINK IP Address & Mask Identical


8.6 NMS Configuration

Configuring and managing the WitLink-2000® Protected links can be performed using the LCD Front Panel or the WitView-EMTM Configurator.

Using the WitView-EMTM Configurator requires the following:

• IP Connection in one of the following ways:

- Ethernet cables connection to the two IDUs (10M ports) in the same side Protected Terminal.

- SLIP connection to one of the Protected Terminal side into the NMS-IN input (RSU).

• IDUs’ IP address setting.

• IP routing tables setting.

Refer to the companion manual, ‘WitView-EMTM, SNMP Management System’ for more information.

8.6.1 Hardware Connections Two methods to access and manage the protected terminals are available:

Ethernet – Using the 10M Base-T ports for fast and efficient management with Ethernet segment as Switch and HUB.

SLIP – Connecting Laptop or Desktop PC serial port to the NMS-In port for direct or remote out-of-band management.


8.6.1.1 Ethernet Connection

Figure 44. ETHERNET Management Hardware Connections

1. At the remote side, connect between the two Ethernet 10M ports of the two IDUs, with a cross Ethernet cable (Included in the RSU kit).

2. At the local side, connect the two Ethernet 10M ports of the two IDUs, to an Ethernet segment (via Hub or Switch).

3. At the local side, (to the same Ethernet segment) connect the management PC equipped with WitView-EMTM .


8.6.1.2 SLIP Connection

Figure 45. SLIP Management Hardware Connections

1. At the remote side, connect between the two Ethernet 10M ports of the two IDUs, with a cross Ethernet cable (Included in the RSU kit).

2. At the local side, connect between the two Ethernet 10M ports of the two IDUs, with a cross Ethernet cable (Included in the RSU kit).

3. At the local side, connect the NMS-IN port located on the RSU panel, directly to the PC serial connection using an RS232 cable. An External Modem connection is also available via this port.

8.6.2 IDU IP Address Setting Each Protected Terminal (2 IDUs + 1 RSU) has the following IP interfaces, which need to be initially configured using the LCD Panel:

Ethernet IP Upper Link – This is the Upper Link Access IP address. The network system administrator should assign this IP address.

Ethernet IP Lower Link – This is the Lower Link Access IP address. The network system administrator should assign this IP address.


NMS IN/OUT IP address – This is the SLIP IP address, which is required for daisy-chain configuration or for modem connection. This type of connection requires configuring the NMS IN destination IP (the SLIP target IP address).

Figure 46 WitLink-2000® Redundant Switch Unit IP Address

To ODU

To ODU NMS-OUT IP

NMS-IN IPEthernet IP Lower Link

Ethernet IP Upper Link


CHAPTER 9 Routing Information Protocol (RIP)

RIP is a routing protocol that is widely used for small local networks. This is because it is supported on most routers and on industry standard operating systems such as UNIX, Windows® 2000, Windows® NT etc. Basically, RIP transfers routing tables between computers, calculates new routes and removes non-relevant ones.

9.1 Router Basics

Routers, like other TCP/IP devices, communicate only with networks that are directly connected to their interfaces. However, routers can be ‘taught’ about the existence of other distant networks by ‘teaching’ them where those networks are. One way is by adding routing statements to the router about the remote network. The router is directed to the target path, which is the distant (remote) network and the ‘next hop’ – meaning the first step for that remote network. A routing statement, also called static routing, consists of three parameters: IP address of the remote network; IP mask of the remote network; IP address of the ‘next hop’.

9.2 WitLink-2000® Interfaces

WitLink-2000® incorporates several interfaces that use the TCP\IP protocol. Each terminal has four relevant interfaces: Ethernet (10Base-T), NMS-IN, NMS-OUT, and Link. An additional interface is the10/100 ETH port, used when the 10/100 ETH Plug-In is installed. Each interface can be assigned with an IP address and can communicate with the other interfaces using the internal routing within the link. Each interface has to carry a unique IP address as part of a unique network.WitLink-2000® LAN Configuration.

9.3 Configuring WitLink-2000®: LAN Environment

Using Wireless communication to forward LAN (Ethernet) traffic becomes more popular and sometimes easier to implement than copper or fiber connectivity. The following describes the basic configuration of a LAN connection with management.

Ethernet configuration for WitLink-2000®, has two options:

Out-of-Band - A built-in 10 Mbs Ethernet port. This port is connected through the internal router and needs to be configured accordingly.


In-Band – A 10/100 Ethernet port (available on the LAN plug-in board only). Auto sense \auto speed \Full Duplex ports. Those ports are bridged and connected directly to the RF section of the radio.

IBM Compatible IBM Compatible

Ethernet Ethernet

IDU 1 IDU 2

Eth portEth port

192.168.36.110

192.168.1.10

192.168.1.11

192.168.36.100

Link Int. Link Int.

station # 1 Station # 2

10/100 Eth port 10/100 Eth port

Figure 47. Connection between Two 10 Mbs Ports

This connection is mostly for managerial purposes. The two 10 Mbs ports are routed by the internal routing mechanism. Because of the routing mechanism, the two ports have to be configured to different subnets. As described in the above figure, one side of the link, with Station # 1 is on subnet 192.168.1.0 and the other side of the link, where Station # 2 is, is on subnet 192.168.36.0.


9.4 Routing Statement

In Figure 48, the two hosts of Station # 1 and station # 2 will be linked after routing statement. The syntax for the Windows® OS is as following:

Route add <remote network IP address> mask <remote network IP mask> <next hop>

In the example in Figure 48, a routing statement for each station was added in order to ‘see’ the other side. Likewise, routing on station # 1 was added to ‘see’ station # 2 (in subnet 192.168.36.0).

IBM Compatible IBM Compatible

Ethernet Ethernet

IDU 1 IDU 2

Eth portEth port

192.168.36.110

192.168.1.10

192.168.1.11

192.168.36.100

Link Int. Link Int.

station # 1 Station # 2


Route add 192.168.36.0mask 255.255.255.0

192.168.1.10

Route add 192.168.1.0mask 255.255.255.0

192.168.36.100

Figure 48. Adding Routing Statement to Stations – Using Out-of-Band


9.5 Managing a Link with 10/100 Payload

IBM Compatible

0 Ethernet

IDU 1 IDU 2

Eth portEth port192.168.1.10

192.168.1.11

192.168.36.100

Link Int. Link Int.

ManagementStation


LAN # 1 LAN # 1

Route add 192.168.36.0 mask 255.255.255.0 192.168.1.10

Figure 49. 10/100 Payload Connections with Out-of-Band Management

In this configuration LAN # 1, which is our main Ethernet segment, is connected to the 10/100 Ethernet port on IDU 1 and is being bridged to the other side of the link (IDU 2). This is the main payload. The 10/100 ports are bridged and thus transparent to IP addresses, which is on the third layer of the OSI model. To pass the traffic and data from one side (terminal) to the other there is no need to configure any IP address.

For management, the Out-of-Band port is being used. The Management Station is connected to IDU 1 on subnet 192.168.1.0. A routing statement has to be added to ‘see’ the other side. The Out-of-Band Ethernet port of IDU 2 is used for communication and therefore the routing statement is being pointed to it. The routing statement is as follows: “Route add 192.168.36.0 mask 255.255.255.0 192.168.1.10”


IBM Compatible

0 Ethernet

IDU 1 IDU 2

10.1.1.55

Link Int. Link Int.

ManagementStation


LAN # 1 LAN # 1

10.1.1.100 10.1.1.101

Figure 50. 10/100 Payload Connections with In-Band Management

In this Link configuration, LAN # 1 is connected to the Link (IDU # 1) and bridged to the other side (IDU # 2). This time, the In-Band port is being used for management.

The Management Station is connected to IDU 1 over the main segment with an IP address, which is part of the segment (10.1.1.0 network). An IP address, of the same subnet, is also assigned to the local 10/100 Ethernet port, as well as to the remote terminal.

No routing statement is needed here.

i

NOTE: IP addresses for the 10/100 Ethernet ports are used for managerial purposes and not for payload.


9.6 RIP Advantages

As previously mentioned, in large and complicated networks, dynamic routing is used instead of static routing. When several links are cascaded, or configured in a 1+1 System, additional IP and routing tables needs to be configured. By using a dynamic routing table, which is supported by the RIP protocol, the routing configuration process is simplified.

With the RIP implementation, all the internal interfaces (NMS-IN, NMS-OUT, Link) are automatically assigned with an IP address. Only one IP address has to be manually assigned to the external interface (Ethernet Interface) of each terminal. A routing statement is added in the management host for the first remote network. The dynamic RIP table controls and updates the all network IP addresses. This enables the network to be dynamically adjusted to changing conditions. Otherwise, all routing decisions have to be predetermined and remain static

9.7 RIP in a Cascading Configuration

When cascading several links using RIP saves time to the operator by eliminating the need to configure manually the routing statement and enter all of the network IP addresses. Figure 51 describes the cascading configuration for three links using RIP. The connections between links use the Ethernet ports with a crossover cable. Only one static routing statement needs to be added to the management PC.


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NOTE: The example configuration relates to a private network management configuration. All IP subnet masks used in this example are 255.255.255.0 (class C).

Laptop

IDU 1

IDU 3

LINK IP10.1.1.1

LINK IP10.1.1.3

LINK IP10.3.3.4

LINK IP10.3.3.2

IDU 2

IDU 4

Ethernet

ETH192.168.1.10

192.168.1.11

IDU 5

LINK IP10.5.5.3

LINK IP10.5.5.1

IDU 6

192.168.2.3

192.168.2.2

192.168.3.4

192.168.3.1 192.168.4.3

ETH

ETH ETH

ETH ETH

Route add 10.1.1.3 192.168.1.10

Crossover Cable

Crossover Cable

Figure 51. 10/100 Payload Connections with In-Band Management

In Figure 51, the WitLink-2000® default, the RIP is disabled on all the Ethernet Ports. This is done to prevent RIP information from being propagating ‘back’ to the local public Ethernet network. When using cascading or with a 1+1 System, the RIP should be enabled for those Ethernet ports.

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NOTE: When managing links over the Internet, public IP addresses must be used. To access the remote links in the cascading configuration (as shown in Figure 51 above), a public IP address has to be assigned to ALL Ethernet interfaces on those links that need to be accessed.

9.8 Using RIP with Protected System (1+1 System)

A protected link in a Hot-stand-by configuration system includes four terminals. The system is configured with two active and two non-active terminals. The system will switch automatically, in case of failure, by link (two terminals) or by a single terminal. For managerial purposes, all four terminals are assigned with IP addresses. There are issues that need to be emphasized when configuring the IP addresses of the system:


1. Each pair of terminals (i.e., local or remote) should be assigned with an IP address of the same subnet.

2. Each side of the link should be assigned with an IP address of a different subnet.

3. RIP has to be enabled on the Ethernet interfaces to exchange information (only when not connected to the local public Ethernet network)

4. If RIP is disabled between a pair of terminals, backup IP addresses need to be assigned for both terminals.

When managing a four terminal system, routing must be assigned between terminals for managerial purposes. It can be done by using either static routing or with dynamic routing (RIP).

Communication between the redundant terminals uses an Ethernet connection. When using an Ethernet connection, the two terminals can be connected via HUB \ Switch, using a straight through cable (CAT 5), or a direct connection between the terminals using a crossover UTP cable.

Figure 52 describes the IP configuration of the 1+1 System when one side is connected via a hub and the other side with a crossover cable. All IP masks are class C masks (255.255.255.0)

IDU 1

IDU 3

LINK IP10.1.1.1

LINK IP10.1.1.3

LINK IP10.3.3.4

LINK IP10.3.3.2

IDU 2

IDU 4

ETH192.168.1.1

192.168.1.11

192.168.1.2 192.168.3.4

192.168.3.3

ETHETH

ETH

X-OverCableHub

RIP Enable

RIP Disable

Std. Eth cable

Backup Term. IP 192.168.1.2

Backup Term. IP 192.168.1.1

Figure 52. IP Configuration of the 1+1 System

Since the RIP is disabled for IDUs 1 & 3 (as shown in Figure 52), information regarding the redundant terminal must be provided \ exchanged between the two terminals on each side. This information is needed for managerial purposes in case one of the terminals fails. This information is called a ‘Backup IP address’ and it has to be manually assigned to each terminal with the IP address of the redundant terminal.

Using the configuration above (Figure 52) as an example, IDU 1 will receive the IP address of 192.168.1.2 as a backup IP address and IDU 3 will receive the IP address of 192.168.1.1 as a ‘Backup IP address’. This way, if one of the terminals fails to communicate (hardware or software failure), the IP address of the other IDU will be available for the host PC.


When the RIP is enabled (in IDUs 2 & 4), the RIP exchanges information regarding the IP addresses of the primary and the secondary (upper and lower) units.

9.9 Enabling RIP on an Ethernet Interface

The RIP on the Ethernet interfaces of the WitLink-2000® is disabled by default. Enabling the RIP is done via the Control Panel. The following procedure describes the steps to enable RIP on an Ethernet interface from the Front Panel:

1. Press SEL/SAVE, the ‘Please Wait…’ message will be displayed.

2. When ‘Quick Config’ is displayed, press SEL/ SAVE to enter password.

3. The ‘Enter password’ message will be displayed.

4. Enter the supervisor password (ESC, ESC ).

5. ‘Link Capacity’ will be displayed.

6. Scroll with the ‘ESC’ and arrows ( ) until ‘ETH IP RIP’ is displayed.

7. Using SEL/SAVE and the , change the displayed value from ‘Disabled’ to ‘Enabled’.

8. Press SEL/SAVE and the # sign will be displayed on the LCD.

9. Press ‘ESC’ to update and save changes.

10. Follow instructions on the LCD to save changes.

9.10 Configuring 1+1 Management System

When using the 1+1 System, The Management System (WitViewTM) needs to be configured \ loaded with all of the IP addresses of the four terminals. This process is done in two steps. In the first step, the first pair is loaded to the WitView EMTM (usually the active pair). In the second step, the redundant pair is loaded.

STEP 1: Load the configuration of the first set of terminals as if it is a single link

STEP 2: The WitView-EMTM detects a 1+1 System and loads the system screen. WitView-EMTM prompts to load the 1+1 link.

STEP 3: Enter the IP address of the redundant link. Click OK and WitView-EMTM will load the system configuration of the second link.

Final Status: Link configuration has been loaded and displayed by the WitView-EMTM.


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NOTE: The example in Figure 52 uses a private IP address (192.168.1.0 network for the local, and 192.168.3.0 network for the remote). This range of addresses is not routable and therefore cannot be used over the Internet. For using \ managing the 1+1 System over the Internet, a set of public addresses must be used. The IP addresses needed should be two addresses per side (local or remote) part of two different subnets (all together four legal addresses).

9.11 Managing a 1+1 Link via Dial-up Modem

Using an Ethernet connection to cascade terminals is one way to manage the link. The WitLink-2000® also supports management via the serial port. It has a built in SLIP connection (NMS-IN) that can be used either with a direct serial connection to a PC, or with a dial-up modem for remote management. In places where no public Ethernet connection is available, the NMS-IN option can be used to communicate with the link for managerial purposes. When using a direct serial connection with Dial-Up option (SLIP), two crossover cables should be used to connect between the redundant terminals as shown in Figure 53. In addition, the RIP will be enabled in the local side IP management parameters to both active and non-active terminals.

A dial-up modem with serial port direct connection module needs to be configured in the Host PC in order to provide connection via SLIP (Parameters: server type-Unix; Baud-19200, 8, N, 1; with ‘none’ flow control). The ‘Dial-Up’ IP should be assigned to the same IP address as in the ‘NMS-In Dest IP’ local terminals configuration (Figure 53). It was modified from 10.1.1.1 (Default) to 10.1.1.10 in both of the local terminals, which are connected to the common RSU NMS-IN port.

Note: When updating NMS-IN Dest IP avoids conflicts with the other system assigned IPs.

IDU 1

NMS-IN11.1.1.1

IDU 3

LINK IP10.1.1.1

LINK IP10.1.1.3

LINK IP10.3.3.4

LINK IP10.3.3.2

IDU 2

IDU 4

ETH192.168.1.1

11.1.1.10

192.168.1.2 192.168.3.4

192.168.3.3

ETHETH

ETH

X-OverCable

X-OverCable

Modem RIP Enable

RIP Enable

NMS-In Dest IP11.1.1.10

Figure 53. 1+1 System with Modem Configuration for Remote Management


CHAPTER 10 Fault Location and Troubleshooting

10.1 SNMP Traps

SNMP Traps are messages sent by the agent to a number of IP Addresses. The messages includes information about alarms, system status, and information in general. Witcom Ltd. includes a number of defined trap parameters in the MIB, which the user can configure such as the IP, Alarm selection, condition for activation, and content. Witcom Ltd. does not include a default IP Address configuration. Alarms can be mapped to external relays or selected to send SNMP Traps.

NOTE: Traps are asynchronous generated Alarms. Alarms can also be polled by means of the Network Management System (NMS).

10.2 External Relays

External relays are used to control additional equipment connected to the WitLink-2000® system, which are generally not directly related to communications. Such equipment could be a UPS (Uninterruptible Power Supply), buzzer, lights, etc. Relays enable the IDU to respond to defined internal conditions within the system.

10.3 Fault Location Finding Tools

The use of an external equipment used to analyze networks payloads (as PDH, SDH, Ethernet analyzers), which can be helpful for diagnostics of network transmission efficiency and problems. The test results are used to help isolate and then correct fault conditions within a link.

10.3.1 External Tester Equipment used to analyze the network’s transmission efficiency and performance. An example of such equipment is a Bit Error Tester.


10.3.2 LED Indicators The LEDs on the IDU Front Panel are also powerful tools for debugging a defective system. Refer to section 10.4 below for a detailed description.

10.4 Troubleshooting

The following table describes how to interpret messages, LED indicators, and Severity levels in order to help isolate error conditions and steps needed to correct them. The indications are shown on the Control Panel, Element Manager, and included in MIBs.

E v e n t Indication S e v e r i t y P o s s i b l e C a u s e C o r r e c t i v e

A c t i o n s

A IDU - ODU communication failure.

LINK LED plus SNMP* message.

Fatal IDU - ODU Connection fault.

Link down.

Remote not accessible.

RSL low level.

Check to make sure that the IDU-ODU cable is properly connected and up to standard.

If lightening protection is installed, disconnect it, and connect the cable directly between the IDU and the ODU.

B IDU internal failure.

IDU LED plus SNMP* message.

Fatal IDU:

Rx or Tx synthesizer out of lock.

Power supply failure.

Check DC power.

Set factory defaults.

Re-initialize the system before setting all the correct parameters.

If problem persists, call technician.

C ODU Internal Failure.

ODU LED plus SNMP* message.

Fatal ODU:

Rx or Tx synthesizer out of lock.

ODU power supply failure.

Reboot the ODU.

Replace the ODU.

* SNMP includes alarms in the EM and traps.


E v e n t I n d i c a t i o n S e v e r i t y P o s s i b l e C a u s e

C o r r e c t i v e A c t i o n s

D Link Down LED plus SNMP* Message.

LCD displays a pulsating ‘X’.

Fatal MUX or MODEM NOT synchronized.

Power failure.

Frequency interference.

Check weather conditions such as snow, rain, fog etc.

Check for obstacles blocking the line-of-sight.

Verify that the remote terminal is functioning.

If possible, try another frequency to make sure that there isn’t an unknown transmission on your band.

Check the frequency’s capacity.

Check the link’s ID.

Verify that both terminals have the same parameters.

E Remote terminal not accessible

Warning message. Warning Peer (management) problem.

Remote link failed.

Check if the remote terminal is operating properly. Verify IP connection.

F Management event. Security violation.

SNMP* message Message Invalid password entered for ‘community.’

Re-enter password.





G Local ODU not accessible.

Warning message.

No RSL indication.

Fatal Telemetry failure.

ODU doesn’t respond after time-out.

ODU might be running in a loop.

Cable is disconnected.

Check that the IDU is connected to the ODU.

H Local RSL out of range

Warning message.

Low RSL is displayed on the LCD.

Warning RSL is below the initial predefined threshold.

Check the weather conditions such as snow, rain, fog etc.


Increase the remote Tx power to the maximum permitted, or enable the ATPC function.

Check the antenna’s alignment.

I Tributary port.

SNMP* Warning Indicates that there is an AIS on the specified line.

Perform a signal check to see if the line is working even though no information is being transmitted.

Use an external testing simulator.

J Plug-in LOS detection (local).

SNMP* Warning A warning message indicates that there is a LOS on the specified line.

Data transfer is blocked.

Check the line for proper connections.

Check another port – If available.





K Local BER out of range

Warning message.

Warning BER is below the initial predefined threshold.

Internal data transfer problem between the Rx and the Tx.

Check the weather conditions such as snow, rain, fog etc.


Check to see if the RSL is low.

Use an external testing simulator.

L External input doesn’t function.

No input signal.

SNMP* message

Message Incorrectly defined user definition.

Faulty connection.

External connection signal is not at the correct level.

Check user definitions.

Check connections.

Check specifications.

M TFTP failure.

SNMP* Message TFTP failed:

Connectivity – physical indication or logical – TCP/IP connectivity between TFTP server and client.

Operational – incorrect TFTP process.

Hardware – flash, checksum, or corrupt file.

Verify IP connection between the terminal (WitLink-2000®) and the TFTP server.

Check the TFTP procedure.





N Local ODU temperature out of range.

Warning message.

SNMP* message

Warning The local ODU temperature is outside the acceptable temperature range.

Check that the outside temperature is within the ODU operational range as defined on the appropriate technical specification.

O MUTE transmitter Warning message.

SNMP* message.

Warning The ODU transmitter is in the mute mode.

Could be user initiated.

IDU sends a mute command.

If a user command is the cause, check the IDU-ODU connectivity (physical, logical, or loopback).

NOTE: The 1+1 Hot Standby mode requires one transmitter to be mute to prevent frequency interference.

P Temporary communication break.

Severe Error Seconds.

SNMP*

LCD message > Status > Link Performance.

Error SNMP* message

Severe Error Seconds are below the initial predefined threshold.

Check weather conditions such as snow, rain, fog etc.

Check if the RSL is close to the low margin.

Q Main power shorts. Cannot power-up the terminal.

Fatal Power cord polarity reversed.

Correct the power supply cord’s polarity.

NOTE: This is a special case applicable only when the IDU is installed on a rack mount and shared with other equipment’s power supply.



10.5 Isolating Problems

10.5.1 Basics Narrowing down, or identifying the possible sources of a problem is the most efficient way to fix a fault. This is done by getting answers to information-gathering questions you ask yourself and from the WitLink-2000® system operator. Identifying a problem can be difficult and time consuming. Therefore, it advised to proceed logically and gradually narrow down all the possible sources until at last there is only one source left to examine.

Many times it helps to determine what a problem isn’t than what it is. Performing and verifying tests on specific parts of the system to make sure they are properly running is a step towards narrowing down the possible sources.

Take notes during every phase of your testing – including the results. This is to prevent retesting the same component.

Hints for Questions:

• Failure description at the time the problem first appeared.

• system configuration and status at the time the problem caused.

• Firmware version.(Newer versions of software may change commands or memory location).

• System applications and peripheral equipment.

• Corrective operation that have been done already.

• The differences between the last time the system normally worked and the time the fault occurred?

• The operation of the WitLink-2000® system broadly consists of three stages: startup, operation, and shutdown. The stage during which the fault occurs may help correct it.

• Does the fault repeatable, consistent or randomly (try to simulate it).

• Right down logically the faults and use SNMP software features for files save etc.


10.5.2 Repairing the Fault Once the fault has been identified, repairing it should be fairly straightforward. (See for questions to ask, see the troubleshooting tables.) However, there are some additional considerations: Backups and Safety.

10.5.3 Make Backups Backup all critical data, including configuration files if it’s a software fault. Have both a copy of the software version of the program being checked, and the latest version of the program handy. Sometimes the latest version fixes a bug that was within the old version. If you have to upgrade to a newer version of the program, make sure that the latest version is compatible with the system before installing it.

10.5.4 Safety Avoid plug and unplug cables while the power is on. Avoid short circuit the coaxial cable between the ODU and the IDU.

10.5.5 Verify the Repair Fixing a fault doesn’t necessarily mean that the system is fixed. After fixing the specific fault, test the system to make sure that full functionality has been restored.

Test a range of functionality to be sure that:

• The entire problem has been solved.

• No new problems have been introduced.

• System elements compatibility.


CHAPTER 11 Getting Assistance

Getting assistance is needed when a configuration or operation help is required and the documented help will not provide the required solution. There are several options to get assistance in order to get the equipment functional and operational and being provided with the know-how.

11.1.1 Support Web Site Under the Witcom Ltd. Web Site (http://www.wit-com.com) there is a support section. When entering ‘Support’, a Login option will become available. Access to support section is allowed with a login ‘User Name’ and ‘Password’, provided by Witcom Ltd. technical support stuff.

Under support section there is two basic levels: Customer Level and Witcom Ltd. Level. Customer Level allows the user to upload configuration, log and all other files, to the Web site for Witcom Ltd. technical support team to review. The upload is done to ‘Customer Folder’. It also provides obtaining and completing a Return Material Authorization Form (RMA) request for any component or unit the customer wishes to return to Witcom Ltd..

For indirect support contact, an E-Mail to Witcom Ltd. is available. Support personnel email address is: [email protected]

Witcom Ltd. Support Web level, provides the user knowledge base, FAQ database and updated firmware and management software to be downloaded.

Registered customers and users can benefit from Witcom Ltd.’s Web based support services offered by our expert Support Engineering Department. The services made available can help you diagnose and resolve fault conditions.

A phone access can be available to Witcom Ltd. Experts personnel, to assist with solving more difficult questions and urgent problems.


11.1.2 Witcom Ltd. Technical Support Technical assistance contact details by phone call or an e-mail message:

Europe and Israel: Tel: +972 - 4 - 9599666

Fax: +972 - 4 - 9592050

E-Mail: [email protected]

Web: http://www.wit-com.com

11.1.3 Returning Witcom Ltd. Equipment If a unit must be sent back for repair, or replacement, a Return Material Authorization (RMA) number must be obtained before shipping the unit back to Witcom Ltd.. An RMA number can be obtained by filling out an RMA form (an example is attached), and faxing it to Witcom Ltd. according to the information given in the section above.

WARNING: THE IDU AND ODU ARE SEALED AT THE FACTORY. THERE ARE NO SERVICEABLE PARTS INSIDE. OPENING A UNIT INVALIDATES THE WARRANTY.

Customer service information, warranty issues, instructions, guidelines, and an example of a Witcom Ltd. RMA form follow.

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CHAPTER 12 Appendixes

12.1 Appendix A: Factory Default Setting

Factory default settings are provided to ensure communications between both sides of a link. These settings are especially useful when local adjustments are made that do not provide the desired communication result. The technician can always rely on the default settings for communications and check it with local customized settings for debugging purposes.

Default settings are general and provide the basic parameters to ensure proper functionality. When a link is in the field, and you need to implement a default, it will typically be for one of the following two reasons:

1. Link is not operating.

Manually perform the factory default on each terminal. Either the local or the remote terminal may be the first to apply defaults.

2. Link is operating.

Even though communication exists between two terminals, implementing defaults may still be required when, for instance a management mismatch situation occurs and you have to reset the IPs.

Note: When a link is operating, and you need to implement a default for any reason, first perform the action on the remote terminal, and then on the local terminal. i


Factory default parameters, per Plug-In configuration:

12.1.1 E3 + 16E1 PIN Control Panel Parameter: Parameters groups with Default Values:

Configuration Configuration group

Link Link parameters

Link Capacity Frequency (Ch#) Tx Power Link ID ATPC Control RSL Optimal Val RSL Upper Thr. RSL Lower Thr.

E3+1E1 Middle frequency (Depends on the ODU type) Max power and Tx range (Depends on the ODU max pwr) 1 Disabled -45 -40 -50

IP Management IP’s parameters ETH IP Mask ETH IP

ETH IP RIP NMS-In IP NMS-In Dest IP NMS-Out IP NMS-Out Dest IP LINK IP

255.255.255.0 192.168.X.1 (X=ODU Band) In the 1+1 Protected mode, the Upper component equals 1, and the Lower equals 2 for the Hot Standby Application. Disabled Determined by the system 10.1.1.1 NMS-In IP + 1 NMS-In Dest IP + 1 NMS-Out IP + 1 (or NMS-In + 2)

Interfaces Interfaces parameters

NMS-IN Config Baud Rate NMS-OUT Config Flow Control Data Bits Stop Bits Parity

19200 NONE 8 Bits 1 Stop Bit None


Control Panel Parameter: Parameters groups with Default Values:

Operation Operation parameters

Tx Mute Pause TX control Pause TX period System Load Config Mode CW

Off Disabled 600 (Sec) None Factory Default Off

Status Status group System Info System information ODU Serial Num ODU Type ODU Frequency ODU Band ODU Duplex ODU Temperature IDU Serial Num IDU Type ETH MAC Address Sys Up Time Port State

ODU serial number ETSI Operating frequency (GHz) Bands from 1 to 4 According to frequency standard type Internal ODU temperature (Cº and Fº ) IDU’s serial number ETSI IDU’s ETH MAC Address HH:MM:SS (Operational System Time) Active data ports

Revisions System revisions parameters

IDU HW Revisions IDU Software IDU Alternate SW ODU Hardware ODU Software Plug-In Hardware Boot Software

Rev x.x / x.x Rev xx.xx Rev xx.xx Rev xx.xx Rev xx.xx Rev x.xx xx.xx

ALARM LOG Log of system alarms LINK UP LINK DOWN Alarms paging, top to bottom

LOC 00:00:00 LOC 00:00:00 << >>



12.1.2 2 10/100Base-T + 4E1 PIN Control Panel Parameter: Parameters groups with Default Values:



Link Capacity Frequency (Ch#) Channel Spacing Tx Power Fec Byte Number Link ID ATPC Control RSL Optimal Val RSL Upper Thr. RSL Lower Thr.

Eth10/100+4E1 Middle frequency (Depends on the ODU type) 28 MHz Max power and Tx range (Depends on the ODU max pwr) Minimum (10) 1 Disabled -45 -40 -50


ETH IP RIP Eth 10/100 IpMask Eth 10/100 IP NMS-In IP NMS-In Dest IP NMS-Out IP NMS-Out Dest IP LINK IP

255.255.255.0 192.168.X.1 (X=ODU Band) In the 1+1 Protected mode, the Upper component equals 1, and the Lower equals 2 for the Hot Standby Application. Disabled 000.000.000.000 000.000.000.000 Determined by the system 10.1.1.1 NMS-In IP + 1 NMS-In Dest IP + 1 NMS-Out IP + 1 (or NMS-In + 2)



19200 NONE 8 Bits 1 StopBit None




Tx Mute Pause TX control Pause TX period System Load Config Mode CW


Status Status group System Info System information ODU Serial Num ODU Type ODU Frequency ODU Band ODU Duplex ODU Temperature IDU Serial Num IDU Type ETH MAC Address Eth 10/100 MacAdd Sys Up Time Port State

ODU serial number ETSI Operating frequency (GHz) Bands from 1 to 4 According to frequency standard type Internal ODU temperature (Cº and Fº ) IDU’s serial number ETSI IDU’s ETH MAC Address Ethernet card 10/100 MAC Address HH:MM:SS (Operational System Time) Active data ports





LOC 00:00:00 LOC 00:00:00 << >>



12.1.3 2 10/100Base-T + 4DS1 PIN Control Panel Parameter: Parameters groups with Default Values:



Link Capacity Frequency (Ch#) Channel Spacing Tx Power Fec Byte Number Link ID ATPC Control RSL Optimal Val RSL Upper Thr. RSL Lower Thr.

Eth 10/100+4T1 Middle frequency (Depends on the ODU type) 50 MHz Max power and Tx range (Depends on the ODU max pwr) Minimum (10) 1 Disabled -45 -40 -50


ETH IP RIP Eth 10/100 IpMask Eth 10/100 IP NMS-In IP NMS-In Dest IP NMS-Out IP NMS-Out Dest IP LINK IP

255.255.255.0 192.168.X.1 (X=ODU Band) In the 1+1 Protected mode, the Upper component equals 1, and the Lower equals 2 for the Hot Standby Application. Disabled 000.000.000.000 000.000.000.000 Determined by the system 10.1.1.1 NMS-In IP + 1 NMS-In Dest IP + 1 NMS-Out IP + 1 (or NMS-In + 2)



19200 NONE 8 Bits 1 StopBit None




Tx Mute Pause Tx control Pause Tx period System Load Config Mode CW


Status Status group System Info System information ODU Serial Num ODU Type ODU Frequency ODU Band ODU Duplex ODU Temperature IDU Serial Num IDU Type ETH MAC Address Eth 10/100 MacAdd Sys Up Time Port State

ODU serial number ETSI Operating frequency (GHz) Bands from 1 to 4 According to frequency standard type Internal ODU temperature (Cº and Fº ) IDU’s serial number ETSI IDU’s ETH MAC Address Ethernet card 10/100 MAC Address HH:MM:SS (Operational System Time) Active data ports




Alarm Log Log of system alarms LINK UP LINK DOWN Alarms paging, top to bottom

LOC 00:00:00 LOC 00:00:00 << >>



12.1.4 DS3 + 16DS1 PIN Control Panel Parameter: Parameters groups with Default Values:




T3+4E1 Middle frequency (Depends on the ODU type) Max power and Tx range (Depends on the ODU max pwr) 1 Disabled -45 -40 -50



255.255.255.0 192.168.X.1 (X=ODU Band) In the 1+1 Protected mode, the Upper component equals 1, and the Lower equals 2 for the Hot Standby Application. Disabled Determined by system 10.1.1.1 NMS-In IP + 1 NMS-In Dest IP + 1 NMS-Out IP + 1 (or NMS-In + 2)







TX Mute Pause TX control Pause TX period System Load Config Mode CW








LOC 00:00:00 LOC 00:00:00 << >>



12.1.5 8E1 PIN Control Panel Parameter: Parameters groups with Default Values:




8E1 Middle frequency (Depends on the ODU type) Max power and Tx range (Depends on the ODU max pwr) 1 Disabled -45 -40 -50


















LOC 00:00:00 LOC 00:00:00 << >>



12.1.6 8DS1 PIN Control Panel Parameter: Parameters groups with Default Values:




8T1 Middle frequency (Depends on the ODU type) Max power and Tx range (Depends on the ODU max pwr) 1 Disabled -45 -40 -50


















LOC 00:00:00 LOC 00:00:00 << >>


12.2 APPENDIX B: Interfaces (Pinouts)

12.2.1 Direct Access Cable Pinout RJ48 Cable with DB9 Adapter

DB9 Female (Pin #) RJ48 (Pin #) Function

3 6 Tx

5 4 GND

2 5 Rx

12.2.2 Modem Connection Cable with Cable Pinout RJ48 Cable with DB25 Adapter

DB9 Female (Pin #)

DB25 Female (Pin #)

RJ48 (Pin #) Function

3 2 5 Tx

4 7 4 GND

2 3 6 Rx

7-8 (shorted) 4-5 (shorted) - RTS-CTS

4-6 (shorted) 6-20 (shorted) - DTR-DSR


12.2.3 IDU Alarm Connection Pinout

PIN NUMBER FUNCTION 1 EXT INPUT 1A 2 EXT INPUT 1B 3 EXT INPUT 2A 4 EXT INPUT 2B 5 RELAY 2 - NO 6 RELAY 2 – C 7 RELAY 1 – NC 8 RELAY 5 – C 9 RELAY 5 – NO

10 RELAY 4 – NC 11 RELAY 3 – NO 12 NOT USED 13 GND 14 EXT INPUT 3A 15 EXT INPUT 3B 16 EXT INPUT 4A 17 EXT INPUT 4B 18 RELAY 2 – NC 19 RELAY 1 – NO 20 RELAY 1 – C 21 RELAY 5 – NC 22 RELAY 4 – NO 23 RELAY 4 – C 24 RELAY 3 – NC 25 RELAY 3 – C

DB25 IDU Female Connector (Front Side)


12.2.4 Service Channel Connectors (RJ-48) DATA IN

PIN NO. PIN NAME* 1 NOT USED

2 NOT USED

3 NOT USED

4 GND

5 RS-232 TXD

6 RS-232 RXD

7 NOT USED

8 NOT USED

NMS IN

PIN NO. PIN NAME* 1 NOT USED

2 NOT USED

3 NOT USED

4 GND

5 RS-232 TXD

6 RS-232 RXD

7 NOT USED

8 RS 232 RTS

NMS OUT

PIN NO. PIN NAME*

1 NOT USED

2 NOT USED

3 NOT USED

4 GND

5 RS-232 RXD

6 RS-232 TXD

7 NOT USED

8 RS 232 CTS

* All pin names refer to the WitLink-2000® system


TEST

PIN NO. PIN NAME*

4 GND

5 RS-232 TXD

6 RS-232 RXD

8 RS 232 RTS

ETHERNET

PIN NO. PIN NAME*

1 TX+

2 TX-

3 RX+

6 RX-



12.2.5 Service Channel Connectors (RJ-11)

HANDSET

PIN NO. PIN NAME*

1 Microphone +

2 Speaker -

3 Speaker +

4 Microphone (GND)

The RJ-11 connector enables telephone communications between two units. The handset is a “k” style unit. It incorporates low-level electric microphine and a dynamic receiver equipped with a hearing aid coil and a varistor for limiting the receive level.

Transmitter Receiver

Transmit Output Level at 100Hz:

-46dBV +/- 4db

Receive Output Level at 100Hz:

79dBSPL +/- 4db

Output Impedance at 100Hz:

1000 +/- 300ohms.

Receive Impedance at 100Hz:

150 +/- 20%.



12.2.6 Data Channel Connectors

12.2.6.1 DS1/E1 Inputs PIN NUMBER FUNCTION*

1 RXRING

2 RXTIP

4 TXRING

5 TXTIP

12.2.6.2 Ethernet 10/100 Base-T (for LAN Plug-in) PIN NUMBER FUNCTION*

1 RX+

2 RX-

3 TX+

6 TX-

* All functions refer to the WitLink-2000® system


12.3 APPENDIX C: Frequency Spectrum Allocations

This chapter describes the frequency spectrum allocations. The following comments are applicable to all the allocutions described in this appendix:

1. For more information please refer to the relevant published standards.

2. There could be changes between different countries or states (USA). Please check your local regulations for the accurate frequencies.

3. There are sub-channels for frequency pairs other than those indicated below (spectrum and capacity on demand). Frequency can be selected in 0.25 MHz steps.

4. The WitView-EMTM Configurator determines the first and last valid frequencies.

5. For convenience, a "channel number" is associated with each frequency transmission and reception pair (full duplex). The numbers should be appropriate for both terminals.

6. The tables in this chapter for frequency Band 1,2,3,4 in MHz units for the Transmit Power (Tx).

WitLink-2000® ODU Part Number Identifier

The WitLink-2000® ODU Part Number is defined as: ODU X-B-C-DE

(See table below)

X = Type

X = 1 FCC Standard Power

X = 2 ETSI Standard Power

X = 3 FCC High Power

X = 4 ETSI High Power

B = Duplex (Tx/Rx spacing)

C = Frequency Bands 1:3, 2:4

DE= Frequency 7, 8, 13, 15, 18, 23, 26, 38


Example: ODU 2-1-4-23 = ETSI, 1200MHz / Band 4, 23GHz

X B C DE Duplex Spacing 1 1 1:3, 2:4 38 700

1 1 1:3, 2:4 23 1200

1 or 3 1 1:3 18 1560

2 1 1:3, 2:4 38 1260

2 1 1:3, 2:4 23 1200

2 2 1:3 23 1008

2 3 1:3, 2:4 23 1232

2 or 4 1 1:3, 2:4 18 1010

2 1 1:3, 2:4 26 1008

4 3 1:3 15 728

4 2 1:3, 2:4 15 420

4 1 1:3, 2:4 15 315

4 1 1:3, 2:4 13 266

2 or 4 1 1:3, 2:4 8 311.32

2 or 4 2 1:3, 2:4 8 126

2 or 4 3 1:3, 2:4 8 119

2 or 4 1 1:3, 2:4 7 154

2 or 4 2 1:3, 2:4 7 154

2 or 4 3 1:3, 2:4 7 161

2 or 4 4 1:3, 2:4 7 161

Table 17 ODU Part Number Identifier


12.3.1 Types of WitLink-2000® Systems and Frequency Allocations

• ETSI – 7GHz ODU-2-1-X-7 (X = 1,3 : 2,4)

• ETSI – 7GHz ODU-4-1-X-7 (X = 1,3 : 2,4)

• ETSI – 7 GHz ODU-2-2-X-7 (X = 1,3 : 2,4)

• ETSI – 7 GHz ODU-4-2-X-7 (X = 1,3 : 2,4)

• ETSI – 7 GHz ODU-2-3-X-7 (X = 1,3 : 2,4)

• ETSI – 7 GHz ODU-4-3-X-7 (X = 1,3 : 2,4)

• ETSI – 7 GHz ODU-2-4-X-7 (X = 1,3 : 2,4)

• ETSI – 7 GHz ODU-4-4-X-7 (X = 1,3 : 2,4)

• ETSI – 8 GHz ODU-2-1-X-8 (X = 1,3 : 2,4)

• ETSI – 8 GHz ODU-4-1-X-8 (X = 1,3 : 2,4)

• ETSI – 8 GHz ODU-2-2-X-8 (X = 1,3 : 2,4

• ETSI – 8 GHz ODU-4-2-X-8 (X = 1,3 : 2,4)

• ETSI – 8 GHz ODU-2-3-X-8 (X = 1,3 : 2,4)

• ETSI – 8 GHz ODU-4-3-X-8 (X = 1,3 : 2,4)

• ETSI – 13 GHz ODU-4-1-X -13 (X = 1,3 : 2,4)

• ETSI – 15 GHz ODU-4-1-X-15 (X = 1,3 : 2,4)

• ETSI – 15 GHz ODU-4-2-X-15 (X = 1,3 : 2,4)

• ETSI – 15 GHz ODU-4-3-X-15 (X = 1,3)

• FCC – 18 GHz ODU-1-1-X-18 (X = 1,3)

• FCC – 18 GHz ODU-3-1-X-18 (X = 1,3)

• ETSI – 18 GHz ODU-2-1-X -18 (X = 1,3 : 2,4)

• ETSI – 18 GHz ODU-4-1-X -18 (X = 1,3 : 2,4)


• FCC – 23 GHz ODU-1-1-X -23 (X = 1,3 : 2,4)

• ETSI – 23 GHz ODU-2-1-X -23 (X = 1,3 : 2,4)

• ETSI – 23 GHz ODU-2-2-X -23 (X = 1,3)

• ETSI – 23 GHz ODU-2-3-X -23 (X = 1,3 : 2,4)

• ETSI – 26 GHz ODU-2-3-X -26 (X = 1,3 : 2,4)

• FCC – 38 GHz ODU-1-1-X -38 (X = 1,3 : 2,4)

• ETSI – 38 GHz ODU-2-1-X -38 (X = 1,3 : 2,4)


ETSI – 7 GHz Low ODU-2(4)-1-X-7 [X (Bands)= 1,2,3,4] General: Radio: 7128 – 7268 MHz and 7282 – 7422 MHz; Duplex = 154 MHz Standard: CEPT/ERC/REC 12-08E // ITU-R F.386-6 ETSI EN 301 Z16 Channel Frequencies

ODU-4-1-1-7 ODU-4-1-3-7

Bands 1 3

Tx-Band: 7128 ÷ 7212 Tx-Band: 7282 ÷ 7366 Rx-Band: 7282 ÷ 7366 Rx-Band: 7128 ÷ 7212 ODU-4-1-2-7 ODU-4-1-4-7

Bands

2 4

Tx-Band: 7212 ÷ 7268 Tx-Band: 7366 ÷ 7422 Rx-Band: 7366 ÷ 7422 Rx-Band: 7212 ÷ 7268

BANDS 1-3 BANDS 2-4 ODU-4-1-1-7 ODU-4-1-3-7 ODU-4-1-2-7 ODU-4-1-4-7

Channel Spacing (MHz) First

Channel Last Channel

First Channel

Last Channel

First Channel

Last Channel

First Channel

Last Channel

7 7131.5 7208.5 7285.5 7362.5 7215.5 7264.5 7369.5 7418.5 14 7135 7205 7289 7359 7219 7261 7373 7415 28 7142 7198 7296 7352 7226 7254 7380 7408


ETSI – 7 GHz High ODU-2(4)-2-X-7 [X (Bands)= 1,2,3,4] General: Radio: 7428 – 7568 MHz and 7582 – 7722 MHz; Duplex = 154 MHz Standard: CEPT/ERC/REC 12-08E // ITU-R F.386-6 ETSI EN 301 Z16 Channel Frequencies

ODU-4-2-1-7 ODU-4-2-3-7

Bands

1 3


Bands

2 4


BANDS 1 – 3 BANDS 2 - 4 ODU-4-2-1-7 ODU-4-2-3-7 ODU-4-2-2-7 ODU-4-2-4-7



First Channel

Last Channel

First Channel

Last Channel

First Channel

Last Channel

7 7431.5 7508.5 7585.5 7662.5 7515.5 7564.5 7669.5 7718.5 14 7435 7505 7589 7659 7519 7561 7673 7715 28 7442 7498 7596 7652 7526 7554 7680 7708


ETSI – 7 GHz Low ODU-2(4)-1-X-7 [X (Bands)= 1,2,3,4] General: Radio: 7124.5 – 7264.5 MHz and 7285.5 – 7425.5 MHz; Duplex = 161 MHz Standard: CEPT/ERC/REC 12-08E // ITU-R F.386-6 ETSI EN 301 Z16 Channel Frequencies

ODU-4-3-1-7 ODU-4-3-3-7

Bands

1 3

Tx-Band: 7124.5 ÷ 7208.5 Tx-Band: 7285.5 ÷ 7369.5 Rx-Band: 7285.5 ÷ 7369.5 Rx-Band: 7124.5 ÷ 7208.5 ODU-4-3-2-7 ODU-4-3-4-7

Bands

2 4

Tx-Band: 7208.5 ÷ 7264.5 Tx-Band: 7369.5 ÷ 7425.5 Rx-Band: 7369.5 ÷ 7425.5 Rx-Band: 7208.5 ÷ 7264.5




First Channel

Last Channel

First Channel

Last Channel

First Channel

Last Channel

7 7128 7205 7289 7366 7212 7261 7373 7422 14 7131.5 7201.5 7292.5 7362.5 7215.5 7257.5 7376.5 7418.5 28 7138.5 7194.5 7299.5 7355.5 7222.5 7250.5 7383.5 7411.5


ETSI – 7 GHz High ODU-2(4)-2-X-7 [X (Bands)= 1,2,3,4] General: Radio: 7424.5 – 7564.5 MHz and 7585.5 – 7725.5MHz; Duplex = 161 MHz Standard: CEPT/ERC/REC 12-08E // ITU-R F.386-6 ETSI EN 301 Z16 Channel Frequencies

ODU-4-4-1-7 ODU-4-4-3-7

Bands

1 3

Tx-Band: 7424.5 ÷ 7508.5 Tx-Band: 7585.5 ÷ 7669.5 Rx-Band: 7585.5 ÷ 7669.5 Rx-Band: 7424.5 ÷ 7508.5 ODU-4-4-2-7 ODU-4-4-4-7

Bands

2 4

Tx-Band: 7508.5 ÷ 7564.5 Tx-Band: 7669.5 ÷ 7725.5 Rx-Band: 7669.5 ÷ 7725.5 Rx-Band: 7508.5 ÷ 7564.5

BANDS 1 – 3 BANDS 2 – 4 ODU-4-4-1-7 ODU-4-4-3-7 ODU-4-4-2-7 ODU-4-4-4-7



First Channel

Last Channel

First Channel

Last Channel

First Channel

Last Channel

7 7428 7505 7589 7666 7512 7561 7673 7722 14 7431.5 7501.5 7592.5 7662.5 7515.5 7557.5 7676.5 7718.5 28 7438.5 7494.5 7599.5 7655.5 7522.5 7550.5 7683.5 7711.5


ETSI – 8 GHz ODU-2(4)-1-X-8 [X (Bands)= 1,2,3,4] General: Radio: 7725 – 8971 MHz and 8036.25 – 8282.25 MHz; Duplex = 311.32 MHz Standard: CEPT/ERC/REC 12-08E // ITU-R F.386-6 ETSI EN 301 Z16 Channel Frequencies

ODU-4-1-1-8 ODU-4-1-3-8

Bands

1 3

Tx-Band: 7725 ÷ 7852 Tx-Band: 8036.25 ÷ 8163.25 Rx-Band: 8036.25 ÷ 8163.25 Rx-Band: 7725 ÷ 7852 ODU-4-1-2-8 ODU-4-1-4-8

Bands

2 4

Tx-Band: 7844 ÷ 7971 Tx-Band: 8155.25 ÷ 8282.25 Rx-Band: 8155.25 ÷ 8282.25 Rx-Band: 7844 ÷ 7971




First Channel

Last Channel

First Channel

Last Channel

First Channel

Last Channel

7 7728.5 7848.5 8039.75 8159.75 7847.5 7967.5 8158.75 8278.7514 7732 7845 8043.25 8156.25 7851 7964 8162.25 8275.2528 7739 7838 8050.25 8149.25 7858 7957 8169.25 8268.2556 7753 7824 8064.25 8135.25 7872 7943 8183.25 8254.25


ETSI – 8 GHz ODU-2(4)-2-X-8 [X (Bands)= 1,2,3,4] General: Radio: 8279 – 8370 MHz and 8405 – 8496 MHz; Duplex = 126 MHz Standard: CEPT/ERC/REC 12-08E // ITU-R F.386-6 ETSI EN 301 Z16 Channel Frequencies

ODU-4-2-1-8 ODU-4-2-3-8

Bands

1 3


Bands

2 4





First Channel

Last Channel

First Channel

Last Channel

First Channel

Last Channel

7 8282.5 8324.5 8408.5 8450.5 8324.5 8366.5 8450.5 8492.5 14 8286 8321 8412 8447 8328 8363 8454 8489 28 8293 8314 8419 8440 8335 8356 8461 8482


ETSI – 8 GHz ODU-2(4)-3-X-8 [X (Bands)= 1,2,3,4] General: Radio: 8279 – 8337 MHz and 8398 – 8496 MHz; Duplex = 119 MHz Standard: CEPT/ERC/REC 12-08E // ITU-R F.386-6 ETSI EN 301 Z16 Channel Frequencies

ODU-4-3-1-8 ODU-4-3-3-8

Bands

1 3


Bands

2 4





First Channel

Last Channel

First Channel

Last Channel

First Channel

Last Channel

7 8282.5 8331.5 8401.5 8450.5 8324.5 8373.5 8443.5 8492.5 14 8286 8328 8405 8447 8328 8370 8447 8489 28 8293 8321 8412 8440 8335 8363 8454 8482 56 8307 8307 8426 8426 8349 8349 8468 8468


ETSI – 13 GHz ODU-4-1-X-13 [X (Bands)= 1,2,3,4] General: Radio: 12.751 – 12.975 GHz and 13.017 – 13.241 GHz; Duplex = 266 MHz Standard: CEPT/ERC/REC 12-02E // ITU-R F497-5 ETSI EN 301 128 Channel Frequencies

ODU-4-1-1-13 ODU-4-1-3-13

Bands

1 3

Tx-Band: 12751÷12863 Tx-Band: 13017÷13129 Rx-Band: 13017÷13129 Rx-Band: 12751÷12863 ODU-4-1-2-13 ODU-4-1-4-13

Bands

2 4

Tx-Band: 12863÷12975 Tx-Band: 13129÷13241 Rx-Band: 13129÷13241 Rx-Band: 12751÷12975




First Channel

Last Channel

First Channel

Last Channel

First Channel

Last Channel

7 12754.5 12859.5 13020.5 13125.5 12866.5 12971.5 13132.5 13237.514 12758 12856 13024 13122 12870 12968 13136 13234 28 12765 12849 13031 13115 12877 12961 13143 13227 56 12779 12835 13045 13101 12891 12947 13157 13213


ETSI – 15 GHz ODU-4-1-X-15 [X (Bands)= 1,2,3,4] General: Radio: 14.628 – 14.911 GHz and 14.943 – 15.226 GHz; Duplex = 315 MHz Standard: Mexico / ETSI EN 301 128 Channel Frequencies

ODU-4-1-1-15 ODU-4-1-3-15

Bands

1 3


Bands

2 4





First Channel

Last Channel

First Channel

Last Channel

First Channel

Last Channel

7 14634 14760 14949 15075 14767 14907 15082 15222 14 14648 14746 14963 15061 14774 14900 15089 15215 28 14662 14746 14977 15061 14774 14886 15089 15201 56 14676 14732 14991 15047 14788 14872 15103 15187


ETSI – 15 GHz ODU-4-2-X-15 [X (Bands)= 1,2,3,4] General: Radio: 14.501 – 14.928 GHz and 14.921 – 15.348 GHz; Duplex = 420 MHz Standard: ITU-R F.636-3 ETSI EN 301 128 Channel Frequencies

ODU-4-2-1-15 ODU-4-2-3-15

Bands

1 3


Bands

2 4





First Channel

Last Channel

First Channel

Last Channel

First Channel

Last Channel

7 14504.5 14714.5 14924.5 15134.5 14721.5 14917.5 15141.5 15337.514 14515 14711 14935 15131 14725 14921 15145 15341 28 14515 14711 14935 15131 14739 14907 15159 15327 56 14529 14697 14949 15117 14753 14893 15173 15313


ETSI – 15 GHz ODU-4-3-X-15 [X (Bands)= 1,3] General: Radio: 14.501 – 14.620 GHz and 15.229 – 15.348 GHz; Duplex = 728 MHz Standard: CEPT/ERC/REC/12-07E ETSI EN 301 128 Channel Frequencies ODU-4-3-1-15 ODU-4-3-3-15

Bands

1 3


BANDS 1-3 ODU-4-3-1-15 ODU-4-3-3-15

ChannelSpacing (MHz) First


First Channel

Last Channel

7 14504.5 14609.5 14924.5 15337.5 14 14515 14613 14243 15341 28 14515 14599 14243 15327 56 14529 14585 15257 15313


FCC – 18 GHz ODU-1(3)-1-X-18 [X (Bands)= 1,3] General: Radio: 17.700 – 18.140 GHz and 19.260 – 19.700 GHz; Duplex = 1560 MHz Standard: FCC Part 101 & Part 15/B & Part 2 Channel Frequencies ODU-1-1-1-18 ODU-1-1-3-18

Bands

1 3


BANDS 1-3 ODU-1-1-1-18 ODU-1-1-3-18



First Channel

Last Channel

5 17702.5 18137.5 19262.5 19697.5 10 17705 18135 19265 19695 20 17710 18130 19270 19690 40 17720 18120 19280 19680


ETSI – 18 GHz ODU-2(4)-1-X-18 [X (Bands)= 1,2,3,4] General: Radio: 17.700 – 18.690 GHz and 18710 – 19.700 GHz; Duplex = 1010 MHz Standard: CEPT/REC/ 12-03E // ITU-R F.595-6 ETSI EN 301 128 Channel Frequencies

ODU-2-1-1-18 ODU-2-1-3-18

Bands

1 3

Tx-Band: 17700.0÷18222.5 Tx-Band: 18710.0÷19232.5 Rx-Band: 18710.0÷19232.5 Rx-Band: 17700.0÷18222.5 ODU-2-1-2-18 ODU-2-1-4-18

Bands

2 4

Tx-Band: 18208.75÷18690.0 Tx-Band: 19218.75÷19700.0 Rx-Band: 19218.75÷19700.0 Rx-Band: 18208.75÷18690.0




First Channel

Last Channel

First Channel

Last Channel

First Channel

Last Channel

27.5 17727.5 18195 18737.5 19205 18222.5 18662.5 19232.5 19672.755 17755 18195 18765 19205 18250 18635 19260 19645


FCC – 23 GHz ODU-1-1-X-23 [X (Bands)= 1,2,3,4] General: Radio: 21.200 – 22.400 GHz and 22.400 – 23.600 GHz; Duplex = 1200 MHz Standard: FCC Part 101 & Part15/B & Part 2 Channel Frequencies

ODU-1-1-1-23 ODU-1-1-3-23

Bands

1 3


Bands

2 4





First Channel

Last Channel

First Channel

Last Channel

First Channel

Last Channel

12.5 21206.25 21793.75 22406.25 22993.75 21806.25 22393.75 23006.25 23593.7525 21212.5 21787.5 22412.5 22987.5 21812.5 22387.5 23012.5 23587.5 50 21225 21775 22425 22975 21825 22375 23025 23575


ETSI – 23 GHz ODU-2-2-X-23 [X (Bands)= 1,3] General: Radio: 22.000 – 22.592 GHz and 23.008 – 23.600 GHz; Duplex = 1008 MHz Standard: T/R 13-02E ETSI EN 301 128 Channel Frequencies ODU-2-2-1-23 ODU-2-2-3-23

Bands

1 3


BANDS 1-3 ODU-2-2-1-23 ODU-2-2-3-23



First Channel

Last Channel

7 22011.5 22585.5 23019.5 23593.5 14 22015 22575 23023 23583 28 22022 22554 23030 23562 56 22078 22526 23086 23534


ETSI – 23 GHz ODU-2-3-X-23 [X (Bands)= 1,2,3,4] General: Radio: 21.224 – 22.344 GHz and 22.456 – 23.576 GHz; Duplex = 1232 MHz Standard: REC ITU-R F.637-3 ETSI EN 301 128 Channel Frequencies

ODU-2-3-1-23 ODU-2-3-3-23

Bands

1 3


Bands

2 4





First Channel

Last Channel

First Channel

Last Channel

First Channel

Last Channel

7 21227.5 21780.5 22459.5 23012.5 21787.5 22340.5 23019.5 23572.514 21231 21777 22463 23009 21791 22337 23023 23569 28 21238 21770 22470 23002 21798 22330 23030 23562 56 21252 21756 22484 22988 21812 22316 23044 23548


ETSI – 26 GHz ODU-2-1-X-26 [X (Bands)= 1,2,3,4] General: Radio: 24.549 – 24.445 GHz and 25.557 – 26.453 GHz; Duplex = 1008 MHz Standard: T/R 13-02E ETSI EN 301 128 Channel Frequencies

ODU-2-1-1-26 ODU-2-1-3-26

Bands

1 3


Bands

2 4





First Channel

Last Channel

First Channel

Last Channel

First Channel

Last Channel

7 24552.5 24993.5 25560.5 26001.5 25000.5 25441.5 26008.5 26449.514 24556 24990 25564 25998 25004 25438 26012 26446 28 24563 24983 25571 25991 25011 25431 26019 26439 56 24577 24969 25585 25977 25025 25417 26033 26425


FCC – 38 GHz ODU-1-1-X-38 [X (Bands)= 1,2,3,4] General: Radio: 38.600 – 39.300 GHz and 39.300 – 40.000 GHz; Duplex = 700 MHz Standard: FCC Part 101 & Part15/B & Part 2 Channel Frequencies

ODU-1-1-1-38 ODU-1-1-3-38

Bands

1 3


Bands

2 4





First Channel

Last Channel

First Channel

Last Channel

First Channel

Last Channel

12.5 38606.25 38943.75 39306.25 39643.75 38956.25 39293.75 39656.25 39993.7525 38612.5 38937.5 39312.5 39637.5 38962.5 39287.5 39662.5 39987.5 50 38625 38925 39325 39625 38975 39275 39675 39975


ETSI – 38 GHz ODU-2-1-X-38 [X (Bands)= 1,2,3,4] General: Radio: 37.058 – 38.178 GHz and 38.318 – 39.438 GHz; Duplex = 1260 MHz Standard: T/R 12-01/ITU-R F.749-1 ETSI EN 301 128 Channel Frequencies

ODU-2-1-1-38 ODU-2-1-3-38

Bands

1 3


Bands

2 4





First Channel

Last Channel

First Channel

Last Channel

First Channel

Last Channel

7 37061.5 37614.5 38321.5 38874.5 37621.5 38174.5 38881.5 39434.514 37065 37611 38325 38871 37625 38171 38885 39431 28 37072 37604 38332 38864 37632 38164 38892 39424 56 37086 37590 38346 38850 37646 38150 38906 39410

WitLink-2000 User Manual V3[1].21

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