rtn 1 System Description

Chapter 1 Overview 1-1.........................................................................................

1.1 Introduction to IAD 1-1..................................................................................1.2 Functions of the IAD132E(T) 1-2..................................................................1.3 Services Provided by the IAD132E(T) 1-2....................................................

Chapter 2 Features 2-1..........................................................................................

2.1 Flexible Configuration 2-1.............................................................................2.2 Diversified Interfaces 2-1..............................................................................

2.2.1 Interfaces Provided by Rear-access IAD132E(T) 2-1..........................2.2.2 Interfaces Provided by Front-access IAD132E(T) 2-2.........................

2.3 High QoS 2-2................................................................................................2.4 Multiple Call Modes 2-2................................................................................2.5 Convenient Management 2-3.......................................................................2.6 Simple Maintenance 2-4...............................................................................2.7 Reliability 2-4................................................................................................2.8 Security 2-5..................................................................................................

Chapter 3 Structure 3-1.........................................................................................

3.1 Hardware Structure 3-1................................................................................3.1.1 Front Panel 3-1....................................................................................3.1.1 Rear Panel 3-2.....................................................................................

3.2 Software System 3-3....................................................................................3.2.1 Principle 3-3.........................................................................................3.2.2 Software Structure 3-4.........................................................................

Chapter 4 Networking Applications 4-1...............................................................

4.1.1 Hybrid Access 4-1.....................................................................................4.1.2 Networking with PSTN/PBX 4-2................................................................4.1.3 IP Centrex Networking 4-3........................................................................4.1.4 Networking for Multiple Uplink Modes 4-4.................................................4.1.5 Networking with ETG 4-5...........................................................................

Chapter 5 Specifications and References 5-1.....................................................

5.1 System Specifications 5-1............................................................................5.2 Service Specifications 5-1............................................................................5.3 Complied Standards and Protocols 5-3........................................................

Appendix A List of Acronyms and Abbreviations A-1........................................

HUAWEI

U-SYS IAD132E(T) Integrated Access Device System Description

V100R001/ V100R101/ V100R002

U-SYS IAD132E(T) Integrated Access Device

System Description

Manual Version T2-010275-20040830-C-1.14

Product Version V100R001/ V100R101/ V100R002

BOM 31020775

Huawei Technologies Co., Ltd. provides customers with comprehensive technical support and service. Please feel free to contact our local office, customer care center or company headquarters.

Huawei Technologies Co., Ltd.

Address: Administration Building, Huawei Technologies Co., Ltd.,

Bantian, Longgang District, Shenzhen, P. R. China

Postal Code: 518129

Website: http://www.huawei.com

Email: [email protected]

Copyright © 2004 Huawei Technologies Co., Ltd.

All Rights Reserved

No part of this manual may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.

Trademarks

, HUAWEI, C&C08, EAST8000, HONET, , ViewPoint, INtess, ETS, DMC,

TELLIN, InfoLink, Netkey, Quidway, SYNLOCK, Radium, M900/M1800, TELESIGHT, Quidview, Musa, Airbridge, Tellwin, Inmedia, VRP, DOPRA, iTELLIN, HUAWEI OptiX, C&C08 iNET, NETENGINE, OptiX, SoftX, iSite, U-SYS, iMUSE, OpenEye, Lansway, SmartAX are trademarks of Huawei Technologies Co., Ltd.

All other trademarks mentioned in this manual are the property of their respective holders.

Notice

The information in this manual is subject to change without notice. Every effort has been made in the preparation of this manual to ensure accuracy of the contents, but all statements, information, and recommendations in this manual do not constitute the warranty of any kind, express or implied.

About This Manual

Version

The product versions that correspond to this manual are U-SYS IAD132E(T) V100R001, IAD132E(T) V100R101and IAD132E(T) V100R002.

Related Manuals

Manual Content

U-SYS IAD132E(T) Integrated Access Device Operation Manual

It provides guides on the use of IAD132E(T) command line, data configuration, and maintenance operations.

U-SYS IAD132E(T) Integrated Access Device System Description

It provides an overall introduction to the IAD132E(T), including the functional structure, application and specifications.

U-SYS IAD132E(T) Integrated Access Device Installation Manual

It provides guides on the installation of the IAD132E(T), including the hardware installation and software loading.

Organization of the Manual

The manual briefs the function, structure, orientation, applications and specifications of the U-SYS IAD 132E(T)

Chapter 1 Overview introduces the functions, orientation, supported services and networking applications of the U-SYS IAD132E(T).

Chapter 2 Features introduces in detail the merits of the U-SYS IAD132E(T). Chapter 3 Structure introduces the hardware structure, software modules and

the implementation principles. Chapter 4 Networking Applications introduces five typical networking

applications of IAD132E(T). Chapter 5 Specifications and References introduces the system specifications

and service specifications, as well as the complied protocols and standards. Appendix A List of Acronyms and Abbreviations is a collection of acronyms

and abbreviations used in this manual.

Intended Readers

The manual is intended for the following readers:

Network designers and administrators Technicians concerned with the U-SYS IAD132E(T).

Conventions

This manual uses the following conventions:

I. General conventions

Convention Description

Arial Normal paragraphs are in Arial.

Arial Narrow Warnings, Cautions, Notes and Tips are in Arial Narrow.

Boldface Headings are in Boldface.

Courier New Terminal Display is in Courier New.

II. Command conventions


Boldface The keywords of a command line are in Boldface.

italic Command arguments are in italic.

[ ] Items (keywords or arguments) in square brackets [ ] are optional.

{ x | y | ... } Alternative items are grouped in braces and separated by vertical bars. One is selected.

[ x | y | ... ] Optional alternative items are grouped in square brackets and separated by vertical bars. One or none is selected.

{ x | y | ... } * Alternative items are grouped in braces and separated by vertical bars. A minimum of one or a maximum of all can be selected.

[ x | y | ... ] * Optional alternative items are grouped in square brackets and separated by vertical bars. Many or none can be selected.

III. GUI conventions


< > Button names are inside angle brackets. For example, click <OK> button.

[ ] Window names, menu items, data table and field names are inside square brackets. For example, pop up the [New User] window.

/ Multi-level menus are separated by forward slashes. For example, [File/Create/Folder].

IV. Keyboard operation

Format Description

<Key> Press the key with the key name inside angle brackets. For example, <Enter>, <Tab>, <Backspace>, or <A>.

<Key1+Key2> Press the keys concurrently. For example, <Ctrl+Alt+A> means the three keys should be pressed concurrently.

<Key1, Key2> Press the keys in turn. For example, <Alt, A> means the two keys should be pressed in turn.

V. Mouse operation

Action Description

Click Press the left button or right button quickly (left button by default).

Double Click Press the left button twice continuously and quickly.

Drag Press and hold the left button and drag it to a certain position.

VI. Symbols

Eye-catching symbols are also used in the manual to highlight the points worthy of special attention during the operation. They are defined as follows:

Caution, Warning, Danger: Means reader be extremely careful during the

operation.

Note, Comment, Tip, Knowhow, Thought: Means a complementary description.

System Description U-SYS IAD132E(T) Integrated Access Device Table of Contents

i

Table of Contents

Chapter 1 Overview....................................................................................................................... 1-1 1.1 Introduction to IAD ............................................................................................................. 1-1 1.2 Functions of the IAD132E(T) ............................................................................................. 1-2 1.3 Services Provided by the IAD132E(T)............................................................................... 1-2

Chapter 2 Features........................................................................................................................ 2-1 2.1 Flexible Configuration ........................................................................................................ 2-1 2.2 Diversified Interfaces ......................................................................................................... 2-1

2.2.1 Interfaces Provided by Rear-access IAD132E(T) ................................................... 2-1 2.2.2 Interfaces Provided by Front-access IAD132E(T) .................................................. 2-2

2.3 High QoS ........................................................................................................................... 2-2 2.4 Multiple Call Modes ........................................................................................................... 2-2 2.5 Convenient Management................................................................................................... 2-3 2.6 Simple Maintenance .......................................................................................................... 2-4 2.7 Reliability............................................................................................................................ 2-4 2.8 Security .............................................................................................................................. 2-5

Chapter 3 Structure....................................................................................................................... 3-1 3.1 Hardware Structure............................................................................................................ 3-1

3.1.1 Front Panel.............................................................................................................. 3-1 3.1.1 Rear Panel .............................................................................................................. 3-2

3.2 Software System................................................................................................................ 3-3 3.2.1 Principle................................................................................................................... 3-3 3.2.2 Software Structure .................................................................................................. 3-4

Chapter 4 Networking Applications............................................................................................. 4-1 4.1.1 Hybrid Access ......................................................................................................... 4-1 4.1.2 Networking with PSTN/PBX.................................................................................... 4-2 4.1.3 IP Centrex Networking ............................................................................................ 4-3 4.1.4 Networking for Multiple Uplink Modes..................................................................... 4-4 4.1.5 Networking with ETG .............................................................................................. 4-5

Chapter 5 Specifications and References .................................................................................. 5-1 5.1 System Specifications........................................................................................................ 5-1 5.2 Service Specifications........................................................................................................ 5-1 5.3 Complied Standards and Protocols ................................................................................... 5-3

Appendix A List of Acronyms and Abbreviations .....................................................................A-1

System Description U-SYS IAD132E(T) Integrated Access Device Chapter 1 Overview

1-1

Chapter 1 Overview

1.1 Introduction to IAD

The Integrated Access Device (IAD) locates at the access layer of the Next Generation Network (NGN), and is an important component in the NGN solutions. IAD adopts the Voice over IP (VoIP) technology to encapsulate analog voice signals into data packets that can be transmitted over packet-switched network, in order to provide telephone service over global IP network at a very low cost. Meanwhile, IAD also implements access for data and visual terminals.

The IAD132E(T) Integrated Access Device of Huawei, referred to as the IAD132E(T) hereafter, acts as an IP-based Voice/Fax over IP (VoIP/FoIP) Media Gateway (MG). The IAD132E(T) can provide efficient and high-quality voice services over the global IP network (Internet or Intranet), and provide VoIP/FoIP solutions for customers.

The IAD132E(T) networks with softswitching systems through H.248 or MGCP. In IP Access Network (IP AN), it can network with Edge Trunk Gateway (ETG) and connect the call between the calling party and called party under the control of softswitching system or ETG.

The IAD132E(T) has two models: front-access model and rear-access model, as shown in Figure

Figure 1-1 Appearance of front-access IAD132E(T)

Figure 1-2 Appearance of rear-access IAD132E(T)


1-2

1.2 Functions of the IAD132E(T)

As one of the most popular terminal devices in NGN, IAD132E(T) encapsulates the voice-band signals into IP packets with standard voice codec and compression technologies, and sends the IP packets over the IP network to the called MG, which will make a reverse conversion on the IP packets to recover the original voice-band signals. In this way, VoIP and FoIP functions are achieved.

Compared with Access Media Gateway (AMG5000), its features are as follows.

Depending on hardware configuration, IAD132E(T) can access 16 or 32 Plain Old Telephone Service (POTS) subscribers and provide one 10/100Base-TX network port to access data subscribers. It is suitable for the enterprises, residential communities and companies that have only a few subscribers.

IAD132E(T) can access the IP network in multiple modes, like 10/100Base-TX, 100Base-FX, or Very-high-data-rate Digital Subscriber Line (VDSL). So that the subscriber can have more choices to meet individual requirements.

Figure 1-3 shows the position of IAD132E(T) in the network.

H.323GK

MRS

3rd Party Server

SoftSwitch

EphonePCphone

SIP multimeiatermianl

MGCP/H.248

AMG5000

MGCP/H.248

AAA SCP

PSTN

IP network

TMG

SoftSwitch

IAD132E(T) PSTN

TMGSG

R R

Figure 1-3 Position of IAD132E(T) in the network

1.3 Services Provided by the IAD132E(T)

IAD132E(T) provides abundant services, including:

Access POTS subscribers to IP network Access POTS subscribers to PSTN


1-3

Access Private Branch Exchange (PBX) to IP network Access data subscribers to IP network Semi-Permanent Connection (SPC) over IP network, and internal SPC

T.38 fax or transparent fax transmission PPP over Ethernet (PPPoE) Test on subscriber line Backup of SoftSwitch Together with the Data and Voice Conflux (DVC) device and a LAN switch (LSW in

the following figure), to provide voice/data signal access over a hybrid Category 5 (C5) cable

PSTN services like call forwarding, Caller Identification Display (CID) and call waiting.

Various new services prescribed in the national standards in coordination with a SoftSwitch

Intelligent services and special applications in coordination with a SoftSwitch.

System Description U-SYS IAD132E(T) Integrated Access Device Chapter 2 Features

2-1

Chapter 2 Features

The IAD132E(T) is a low-investment, easy-to-install, easy-to-maintain and simple-structured device. The transmission of voice and data over IP network can greatly reduce the subscribers’ expenses on the calls, and enables easier data access. It meets the requirements on voice, fax and data access promoted by the residential communities, office buildings and enterprises.

2.1 Flexible Configuration

The rear-access IAD132E(T) provides three slots, and the front-access IAD132E(T) provides two slots. Such modular design enables the customer to choose proper types according to actual needs.

The cards accommodated in Slot 1 and Slot 2 can be:

ASI (Analog Subscriber Interface) card ATI (Analog Trunk Interface) card

The cards accommodated in Slot 3 (only provided by the rear-access model) can be:

FSIU/FMIU (100Base-FX Single Mode Fast Ethernet Interface Unit /100Base-FX Multi-Module Fast Ethernet Interface Unit )

FTIU (100Base-TX Fast Ethernet Electrical Interface Unit) VDU (Very-high-rate DSL Interface Unit) ATU (Analog Trunk Interface Unit)

Note:

Slot1 and Slot2 can accommodate both ASI and ATI.

2.2 Diversified Interfaces

The two types of IAD132E(T) can provide the following interfaces.

2.2.1 Interfaces Provided by Rear-access IAD132E(T)

POTS: Each ASI card provides 16 POTS ports (FXS port) FXO: Each ATI card provides 16 FXO ports, and an ATU provides 4 FXO ports. Electrical Ethernet: Five 10/100Base-TX ports (4 on the front panel, 1 on the FTIU)


2-2

Optical Ethernet (single mode/multimode): FSIU card provides one 100Base-FX single mode optical port. FMIU card provides one 100Base-FX multimode optical port.

VDSL: VDU card provides one VDSL port. Serial port: RS-232 local maintenance port (CONSOLE).

2.2.2 Interfaces Provided by Front-access IAD132E(T)

POTS: Each ASI card provides 16 POTS ports (FXS port) FXO: Each ATI card provides 16 FXO ports. Electrical Ethernet: Two 10/100Base-TX ports. VDSL: One VDSL port. Serial port: RS-232 local maintenance port (CONSOLE).

2.3 High QoS

To ensure a high Quality of Service (QoS), the following functions and features have been enabled on the IAD132E(T):

Voice Activation Detection (VAD) Comfortable Noise Generation (CNG) Dynamic adjustment of Jitter Buffer Echo cancellation in compliance with ITU-T G.165/G.168 Lost-packet compensation Detection/generation of Dual Tone MultiFrequency (DTMF) signals Optional TX/RX gain control

2.4 Multiple Call Modes

Call mode: It is also called call routing mode, which means the method for the IAD132E(T) to implement conversation. There are three call modes.

VoIP mode Internal call mode PSTN call mode

By default, IAD132E(T) supports VoIP mode. VoIP calls are implemented under the control of SoftSwitch in NGN.

Internal call mode means that IAD132E(T) independently implements the call between two FXS ports without the attendance of SoftSwitch.

PSTN call mode means to connect the subscriber to the PSTN through FXO port. PSTN calls can be classified into AT0 (Analog Trunk) call, PSTN call without convergence, and PSTN call with convergence. These three PSTN call modes cannot be configured on the same IAD132E(T).


2-3

AT0 provides another means for connecting the PSTN with the NGN. In this mode, the IAD telephone subscribers in the NGN can call the subscribers in the PSTN through the IAD132E(T) that is configured as in AT0 mode. This networking mode differs from that of the Trunk Media Gateway (TMG) in that the TMG connects the NGN and the PSTN through E1 trunks, while IAD132E(T) connects them through analog trunk cables.

The calls with or without convergence provides interconnection between the PSTN subscriber and the telephone subscriber in the IAD132(T). In case the VoIP network is faulty, the IAD subscribers can dial PSTN numbers in these two modes. According to actual networking condition and hardware configuration, you can configure the PSTN call as with or without convergence. If the number of configured FXO ports is less than that of FXS ports, it is called PSTN call with convergence. If the number of configured FXO ports equals to that of FXS ports, it is called PSTN call without convergence.

The internal call mode and PSTN call mode make full use of the network resources. The existence of multiple call modes promotes the communication reliability.

2.5 Convenient Management

The maintenance of IAD132E(T) is very convenient. It includes the following aspects.

I. Local and Remote Maintenance

1) Local maintenance Local maintenance is implemented through the serial port (Console).

2) Remote maintenance Telnet login Network management through Web browser Concentrated network management via SNMP V2/V3

Huawei’s Integrated Access Device Management System (IADMS) running over the SNMP V2/V3 facilitates centralized management on multiple IADs, intelligent terminals and other network devices. IADMS is a subsystem of Huawei iManager N2000 U-SYS Management System (UMS), and you can create multiple IADMSs under the same UMS to manage different telecom operators’ IADs in the entire network. This hierarchical structure helps to reduce the working load of the network management system, since the UMS needs only to manage a limited number of IADMSs.

IADMS is generally located in the machine room on the remote end, while the iManager N2000 UMS is installed in the management center. You can invoke the IADMS Client program in the network management system to manage the IADs.

II. Perfect On-line Help Information

1) Command line


2-4

The on-line help supports multiple languages. By default, it is in English. The language files can be loaded or updated independently.

In any configuration mode, if you enter “help” or “?”, you can obtain the function descriptions for all the commands that correspond to the mode, and which are available for your authority level.

2) NMS ”Help” main menu is available in the NMS Graphic User Interface (GUI). There is also a toolbar in the NMS GUI that offers shortcut icons for common

operation commands. When you put the cursor on the icon, description on corresponding command will be displayed.

2.6 Simple Maintenance Console port on the front panel for fast and easy configuration and test. File loading through the Ethernet ports in File Transfer Protocol (FTP)/Trivial File

Transfer Protocol (TFTP) mode. On-line upgrading and smooth expansion. Fast restoration of cards: when BIOS loading program from Flash, the cards can

recover in less than two minutes after resetting. Excellent maintenance, fault detecting, on-line test, NM alarm reporting and traffic

statistics. Independent clock module for the Control and Voice Processor (CVP) and the

components on the ASI/ATI, while ensuring correct phases between related clocks.

2.7 Reliability Perfect fault detection and NMS alarm function. The system can automatically

detect the faults and report alarms through the NM system to shorten the recovery time. It can also perform automatic detection on faults, monitor on power supply and temperature, and noise control (auto-control on the fan speed according to the temperature).

Support to dual backup of MGCs. If the active MGC is faulty, the IAD132E(T) can automatically switch to register on the backup MGC by means of heartbeat detection or event reliability. In this way, the services on the IAD132E(T) is ensured.

Over-current and over-voltage protection for power module and interface units. Watch Dog Timer (WDT) helps system recover in case of software abnormality. Hot-swappable cards for easy replacement. The service of the system will be

interrupted if the service uplink card is plugged or unplugged. To do this, power off the system first.


2-5

2.8 Security In NGN, the IADMS implements management on the IAD132E(T), and the

SoftSwitch completes the control functions. So the IAD132E(T) must register to the IADMS and the SoftSwitch respectively before the service can start. The IADMS and SoftSwitch will perform authentication on the IAD132E(T) for management and service control.

When an IAD132E(T) device is put into service, the device ID, secret key, IP address or domain name of the IADMS, and IP address or domain name of the SoftSwitch, will be assigned onto the IAD132E(T). The information will not get lost even if the IAD132E(T) is powered off. The device ID, which can be the MGCP domain name or H.248 Management Information Base (MIB), is a character string no longer than 32 bytes, and different devices should have different device IDs. The secret key is also a character string no longer than 32 bytes, and the same secret key should be configured on the SoftSwitch when the IAD132E(T) is put into service.

The command line is protected by a hierarchy of authorities, in order to prevent unauthorized access. There are four levels of operator authorities: SuperAdmin, Admin, Oper and Exec. An Exec can only operate in the user mode, while the Oper, Admin and SuperAdmin can operate in all the command modes. The commands that are available for different operators may be different, if the authority levels are different.

Logs are used to record the maintenance and operation information of the system. In the IAD132E(T), there are operation log, alarm log, debug log etc. The operation log records the login information of various operators (including user name, login time, login date, login mode and IP address) and the operations made on the device after login. The alarm log records major events (mostly alarms) occurred in the system, and the debug log is the collection of the debugging information.

System Description U-SYS IAD132E(T) Integrated Access Device Chapter 3 Structure

3-1

Chapter 3 Structure

The IAD132E(T) adopts box-like design, and has a plug-in card structure. It provides front-access box and rear-access box.

This chapter describes the structure of IAD132E(T) in aspects of hardware and software.

3.1 Hardware Structure

The ports of the IAD132E(T) are located on the front and rear panels. The hardware structure of the front-access model differs greatly from that of the rear-access model. The following part describes them.

3.1.1 Front Panel

I. Front-access model

The front-access model is a 2-slot modular design, with width as 19 inches and height as 1 U. It has two slots. The ports on the front panel are shown in Figure 3-1

1 2 3 4 5

6

7

8

(1) Slot1 (2) Slot2 (3) Line indicators (4) PWR, RUN, ALM indicators (5) LAN interface (6) WAN port (7) CONSOLE port (8) RESET button

Figure 3-1 Front panel of front-access IAD132E(T)

Descriptions on ports:

Slot1/Slot2: Slot for ATI and ASI. WAN/LAN: 10/100Base adaptive Ethernet electrical interface. The WAN port is an

RJ-45 port, and its pinouts 4 and 5 can be used as VDSL port. Console: Maintenance serial port.

Description on button:

RESET: Button used to reboot the device.

Description on indicators:


3-2

Line indicators: They indicate whether the 0~31 user channels of slot 1 and slot 2 are busy.

PWR: Power indicator. RUN: System running indicator. ALM: Alarm indicator

II. Rear-access model

The rear-access IAD132E(T) is a 19-inch wide and 1U high box that contains three slots. The ports on the front panel are shown in Figure 3-2.

1 2 3 4

(1) Ethernet electrical interface (2) Console port (3) Reset button (4) PWR, RUN, ALM and BSY1/BSY2 indicators

Figure 3-2 Front panel of the rear-access IAD132E(T)

Descriptions of ports:

10/100BASE-TX: 10/100Base adaptive Ethernet electrical interface. Console: Maintenance serial port.

Description of button:

RESET: Button used to reboot the device.

Descriptions on indicators:

PWR: Power indicator. RUN: System running indicator. ALM: Alarm indicator. BSY1/BSY2: Card state indicator.

3.1.1 Rear Panel

I. Front-access model

As shown in Figure 3-3, on the rear panel of IAD132E(T), there are -48V DC power port and grounding stud.

1 2

(1) -48V DC power port (2) grounding stud

Figure 3-3 Rear panel of the front-access IAD132E(T)


3-3

II. Rear-access model

The rear-access IAD132E(T) has three slots on the rear panel to accommodate different types of cards, as shown in Figure 3-6. On the leftmost is the power switch and socket, next to which are the three slots.

21 3 4 5 6

(1) Power switch (2) AC power port (3) Reset button (4) Slot 1 (5) Slot 2 (6) Slot 3

Figure 3-4 Rear panel of rear-access IAD132E(T)

3.2 Software System

3.2.1 Principle

Figure 3-5 shows the implementation principle and logic structure of the IAD132E(T).

PCM data flow

Router

IP data flow

IP network

RTP data flow

LANSwitch

Signaling data flowManagement and maintenance data flow

PCM/IP data flow

IAD132E(T)

Analog trunk subscriber

ASI

ATI

CVP FTIU

Analog phone subscriber

SoftSwitch

NMS

Figure 3-5 Service implementation of the IAD132E(T)

The voice signals from the subscriber (i.e. Pulse Code Modulation (PCM)/IP data flow) are transmitted to the device via ASI or ATI, and then encoded by the Digital Signal Processor (DSP) on the CVP. Controlled by the CPU, the PCM/IP data flow is encapsulated into IP packets according to the Realtime Transport Protocol/Realtime Transport Control Protocol (RTP/RTCP). Then the IP packets are transmitted uplink to the IP network through the LSW network port. The signaling data flow exchanged between the IAD132E(T) and the SoftSwitch complies with MGCP or H.248.


3-4

The IAD132E(T) is a self-contained device in NGN, not only be able to report its own state to the SoftSwitch, but also implements detection, alarm reporting and management functions on itself.

3.2.2 Software Structure

The software system of the IAD132E(T) consists of the master CPU software and DSP software on the CVP. The master CPU software is the core of the device, and is responsible for call control, management & maintenance and forwarding of media stream. The DSP software implements voice codec, detection/generation of DTMF and Frequency Shift Keying (FSK), VAD and CNG.

The IAD132E(T) software can also be divided into the following functional modules:

Operations, Administration and Maintenance (OAM) module Service access module SPC processing module VoIP service processing module Protocol processing module Bottom-layer drive processing module

Figure 3-6 shows the relationship among the modules:

Service access module

Protocol processing module

SPC processing module

POTS

FXO

Operations, Adminations and Maintenance (OAM) module

VoIP service processing module

Bottom-layer drive processing module

MGCP/H.248

TDM/DSP

TDM/DSPSubscriber interface

FXO interface

IP network interface



Figure 3-6 Functional modules of the IAD132E(T)

OAM module: It is responsible for operations, administration and maintenance of the IAD132E(T).

Service access module: It filters and reports the information about analog or analog trunk subscribers while forwarding the messages from the service modules.


3-5

SPC processing module: It sets up and maintains the SPC between the subscribers of the same IAD132E(T), or between subscribers of different IAD132E(T) devices.

VoIP service processing module: It controls the signaling exchange between the subscribers, controls the TDM/DSP subscriber module and interworks with the Media Gateway Controller (MGC).

Protocol processing module: It processes MGCP/H248 stack and protocol adaptation.

Bottom-layer drive processing module: It drives the functional chips on the CVP.

System Description U-SYS IAD132E(T) Integrated Access Device Chapter 4 Networking Applications

4-1

Chapter 4 Networking Applications

A single IAD132E(T) device can provide a maximum of 32 VoIP/FoIP channels, and it is widely applied in residential communities, office buildings and corporations to deploy VoIP and FoIP services.

4.1.1 Hybrid Access

This application is typically used in a small-capacity network for voice and data access, like in the residential communities, stories in office buildings, and large office rooms, as shown in Figure 4-1. As the MG for concentrated access, the IAD132E(T) can uplink with the IP network through its Ethernet interfaces, and downlink the subscribers through the POTS ports over the telephone lines already laid in the area.

SoftSwitch

IP network

iOSS App server

IAD132E(T)

IAD132E(T)

LSW LSW

Telephone lineHybrid C5 cable

C5 cable

NGN NMS

IADMS

Splitter

DVC

C5 cable core

C5 cable

C5 cable

Telephone line

Telephone line

Figure 4-1 Hybrid access over one C5 cable with DVC

When a DVC is available, the IAD132E(T) can implement the access of data and voice at the same time over a hybrid C5 cable that connects the DVC with the subscriber through a splitter, as shown in the lower-left part in Figure 4-1.

Figure 4-2 shows the front and rear panel of a DVC. The DVC provides 16 access ports and combines an ordinary telephone line into the C5 cable to form a hybrid C5 cable. On this hybrid C5 cable, pins 1, 2, 3 and 6 of the RJ45 connector are directly connected


4-2

to the output pins 1, 2, 3 and 6 to transmit data signals, while pins 4 and 5 are connected to the telephone lines to transmit voice signals.

Figure 4-2 Front and rear view of a DVC

4.1.2 Networking with PSTN/PBX

To protect our customers’ investment, the IAD132E(T) allows coexistence of circuit-switched phones and packet-switched phones.

As shown in Figure 4-3, the IAD132E(T) (in the lower-left part of the figure) can be connected to PSTN through its FXO port. In the PSTN call ode without convergence, you can configure the corresponding relationship between FXO interface and FXS interface, so as to implement the “one set with two numbers” function. A subscriber has two numbers for the two networks, and can make either VoIP calls in NGN, or PSTN calls. In this way, when one of the networks is busy or out of service, the subscribers can communicate through the other network.

An enterprise, which has PBX, as shown in the right part of Figure 4-3, can connect to the FXO port on IAD132E(T) through the user cable (that is FXS port) on PBX. In this way, the interconnection between PBX user and NGN can be implemented. The IAD132E(T) subscriber can directly call the PBX subscriber.

The IAD132E(T) also provides AT0 call (Analog Trunk call). In Figure 4-3, configure the IAD132E(T) as to provide AT0 call. The IAD132E(T) in right part can call the subscribers in the PSTN through the IAD132E(T) in left part.


4-3

SoftSwitch

IP network

iOSS

App server

IAD132E(T)IAD132E(T)

LSW LSW

PSTN

FXO

NGN NMS

IADMS

FXO

FXS FXS

PBX

Figure 4-3 Networking with current PSTN/PBX

The Foreign eXchange Subscriber (FXS) port usually connects with ordinary telephone set or fax machine on the subscriber side, or connects with the PBX or other devices with FXO ports, in order to provide calling signals like the ringing tone and dialing tone. On the IAD132E(T), the FXS ports and FXO ports work together so that the POTS subscribers can access the PSTN.

In this application, the convergence ratio between the FXO port and the FXS port can be 4:32, 4:16 or 16:16. In the “one set with two numbers” service, you need to set the convergence ratio to 16:16.

4.1.3 IP Centrex Networking

This networking provides IP Centrex solution for large or medium-sized enterprises. As shown in Figure 4-4, IP Centrex can be used for the communication among the headquarters and branches in different geographical locations. The SoftSwitch defines the headquarters and the branches as a basic subscriber group. Subscribers in this group can be both IP phone subscribers and PBX subscribers. They can enjoy the basic services and new services of IP Centrex.


4-4

IADMS

SoftSwitch

IP network

iOSS App server

IAD132E(T)

LSW LSW

IP Centrex

IAD132E(T)

NGN NMS

Figure 4-4 IP Centrex networking

4.1.4 Networking for Multiple Uplink Modes

The IAD132E(T) provides multiple uplink modes for your choice: you can uplink through the electrical Ethernet port, the optical Ethernet port or VDSL port. PC users can access the IP network through the network port provided by IAD132E(T).

SoftSwitch

IP network

iOSS App server

IAD132E(T)

LSW DSLAM

VDSL uplink

IAD132E(T)IAD132E(T)

NGN NMS

IADMS

Fiber

PSTN

Uplink through Ethernetelectrical interface

C5 cable

Uplink through Ethernetoptical port

Figure 4-5 Networking with multiple uplink modes


4-5

4.1.5 Networking with ETG

Apart from standard NGN networking, the IAD132E(T) supports the IP Access Network (IP AN). In a standard NGN networking, the control device is the SoftSwitch, while in IPAN, the control device is the Edge Trunk Gateway (ETG) that is capable of terminating H.248/MGCP, as shown in Figure 4-6. In the IPAN network, the IAD132E(T) is connected to the ETG over the IP network, and the ETG implements control over the IAD132E(T) through H.248/MGCP. The ETG uplinks the PSTN switch through its trunk interfaces running V5 protocol to provide all the services that can be provided in the PSTN.

IP network

IAD132E(T)

LSW LSW

IAD132E(T)

IADMS

PSTN

NGN NMS

ETGV5 interface

Figure 4-6 Networking with ETG

System Description U-SYS IAD132E(T) Integrated Access Device Chapter 5 Specifications and References

5-1

Chapter 5 Specifications and References

5.1 System Specifications

Item Specification

Max. number of subscribers

16 analog subscribers (1 ASI card)

16 analog trunk subscribers (1 ATI card)

32 analog subscribers (2 ASI cards)

32 analog trunk subscribers (2 ATI cards)

Front-access model can access one data subscriber. Rear-access model can access four data subscribers.

Power supply

For front-access model: -48 V DC, ranging -40.0 ~ -57.0 V DC, working current is 5 A.

For rear-access model: AC: 100~240V, 50/60Hz, Max. input current 2.0 A

Max. power consumption 86W

Dimensions 436mm (W)×360mm (D)×42mm (H)

436mm (W)×375mm (D)×42mm (H)

Weight 8 kg

Temperature Long term: 0~+55°C

Short term: -40 ~+85°C

Relative humidity Long term: 5%~85% (non-coagulation)

Short term: 0%~90%

Altitude ≤4000m

Atmospheric pressure 70~106kPa

5.2 Service Specifications

Item Specification

Call processing ability 2,000 BHCAs (Busy Hour Call Attempts)

Simultaneous calls 32


5-2

Item Specification

DSP convergence ratio 1:1

Call completion rate >99%

1-hour call hold capacity >99%

Voice coder conversion time <60ms

Voice encoding rate

G.729: <8Kbps

G.723(5.3K): <5.3Kbps

G.723(6.3K): <6.3Kbps

Delay

CODEC delay:

G.729: <30ms

G.723.1: <40ms

IP packet forwarding delay:

<8ms (1516-byte forwarding delay)

RTCP test delay ≤1s

Max. jittering tolerance ≤80ms

System jittering <10ms

Voice quality

Objective voice assessment:

Perceptual Speech Quality Measurement (PSQM) average <1.5 in high-quality network

PSQM average <1.8 with poor-quality network (packet loss ratio =1%, network jittering =20ms, delay =100ms)

PSQM average <2.0 with worst-quality network (packet loss ratio =5%, network jittering =60ms, delay =400ms)

Subjective voice assessment:

Mean Opinion Score (MOS) >4.0 with high-quality network

MOS >3.5 with poor-quality network (packet loss ratio =1%, network jittering =20ms, delay =100ms)

Voice quality MOS >3.0 with worst-quality network (packet loss ratio =5%, network jittering =60ms, delay =400ms)

Reliability = MTBF/ (MTBF+MTTR) >99.99%

Mean Time Between Failures (MTBF) >30000h

Mean Time To Repair (MTTR) <30min


5-3

5.3 Complied Standards and Protocols

The IAD132E(T) complies with the following standards and protocols:

I. Tone generation and test

Dual-Tone MultiFrequency (DTMF) and calling tones (dialing tone, busy tone, ringback tone, off-hook tone and so on).

V.17, V.21, V.27ter and V.29, voice/fax automatic identification.

II. Voice/multi-media data signal CODEC

ITU-T G.711 µ-Law (64Kbps). ITU-T G.711 A-Law (64Kbps). ITU-T G.723.1 (6.3K/5.3Kbps). ITU-T G.729A (8Kbps).

III. Call signal (call control)

IETF MGCP (RFC 2705).

IV. Voice packet encapsulation/decapsulation

RTP (RFC1889) and Session Description Protocol (SDP, RFC 2327).

V. Internet

Transfer Control Protocol (TCP)/IP, User Datagram Protocol (UDP)/IP, Address Resolution Protocol (ARP)/Reverse Address Resolution Protocol (RARP), Internet Control Message Protocol (ICMP), Internet Group Management Protocol (IGMP), Telnet, HyperText Transfer Protocol (HTTP) Web Server, Domain Name Server (DNS) Client, Dynamic Host Configuration Protocol (DHCP) Client and TFTP Client.

VI. IP address allocation

Static or DHCP.

VII. IP fax

Transparent transmission. ITU-T T.38 real-time IP G3 protocol, rate <14400bps.

System Description U-SYS IAD132E(T) Integrated Acess Device Appendix A List of Acronyms and Abbreviations

A-1

Appendix A List of Acronyms and Abbreviations

Abbreviation Meaning 3rd Party Server Third Party Server A AMG Access Media Gateway ASI Analog Subscriber Interface ATI Analog Trunk Interface ATU Analog Trunk Interface Unit B BHCA Busy Hour Call Attempts BOOTP BOOT strap Protocol BRI Basic Rate Interface C CLI Command Line Interface CNG Comfort Noise Generation CVP Control and Voice Processor D

DOPRA Distributed Object-oriented Programmable Real-time Architecture

DSL Digital Subscriber Line DSLAM Digital Subscriber Line Access Multiplexer DSP Data Signal Processor DVC Data and Voice Conflux E EC Echo Cancellation ETA Ethernet Telephone Adapter ETG Edge Trunk Gateway F FE Fast Ethernet FMIU 100Base-FX Multi-Mode Fast Ethernet Interface Unit FSIU 100Base-FX Single Mode Fast Ethernet Interface Unit FTIU 100Base-T Fast Ethernet Electrical Interface Unit FoIP Fax over IP FTP File Transfer Protocol FXO Foreign eXchange Office FXS Foreign eXchange Station H H.248 H.248/MECAGO protocol I IAD Integrate Access Device IADMS Integrated Access Device Management System IPAN IP Access Network M MFC Multi-Frequency Control MGC Media Gateway Controller MGCP Media Gateway Control Protocol MGW Media Gateway MRS Multimedia Resource Server N NGN Next Generation Network NMS Network Management Station O OAM Operations, Administration and Maintenance

System Description U-SYS IAD132E(T) Integrated Acess Device Appendix A List of Acronyms and Abbreviations

A-2

Abbreviation Meaning OSS Operating Support System P PBX Private Branch Exchange POTS Plain Old Telephone Service PS Packet Switched PSTN Public Switched Telephone Network Q QoS Quality of Service R RAS Remote Access Server RSA Remote Switch Access RSP Remote Subscriber Processor RTP Real-time Transport Protocol RTCP Real-time Transport Control Protocol S SG Signaling Gateway SIP Session Initiation Protocol T TDM Time Division Multiplexing TFTP Trivial File Transfer Protocol TMG Trunk Media Gateway V VDSL Very-high-data-rate Digital Subscriber Line VDU Very-high-rate DSL Interface Unit VoIP Voice over IP W WDT Watch Dog Timer

rtn 1 System Description

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