MD-110 Exchange Chapter 2

INSTALLATION

LZU 10 8 12 29 R 1 A MD110 BC1 1 IMPLEMENT & MANAGE B ASIC INSTALL 1 1

2. Chapter 2 - Installation ........................................................................................... 3

2.1 INTRODUCTION ................................................................................................... 3

2.2 OVERVIEW ............................................................................................................. 4 2.2.1 Glossary of Terms ........................................................................................................... 4

2.2.2 General ........................................................................................................................... 5

2.2.3 Processor Switch Module (PSM) .................................................................................... 6

2.2.4 Interface Module (IFM) .................................................................................................. 6

2.2.5 Power Module (PWM) ................................................................................................... 6

2.2.6 Power Battery Module (PBM) ........................................................................................ 7

2.2.7 Stackable Module Build-Up ........................................................................................... 7

2.2.8 Configuration Capacity ................................................................................................... 8

2.3 FACILITY PLANNING ......................................................................................... 8 2.3.1 Temperature and Humidity ............................................................................................. 8

2.3.2 Heat Dissipation ............................................................................................................. 8

2.3.3 Air Filtration and Ventilation.......................................................................................... 8

2.3.4 Lighting .......................................................................................................................... 8

2.3.5 Floor Loading ................................................................................................................. 9

2.3.6 Stackable Equipment Dimensions................................................................................... 9

2.3.7 Floor Plans ...................................................................................................................... 9

2.3.8 Electrical Requirements ................................................................................................ 10

2.3.9 Earthing ........................................................................................................................ 10

2.3.10 Cabling ......................................................................................................................... 10

2.3.10.1 General .................................................................................................................... 10

2.3.10.2 Cable Connectors ..................................................................................................... 11

2.3.10.3 Labelling .................................................................................................................. 12

2.4 INSTALLATION PREPARATION .................................................................... 14 2.4.1 Tools ............................................................................................................................. 14

2.4.2 Unpacking ..................................................................................................................... 14

2.4.3 Delivery Documents ..................................................................................................... 15

2.4.3.1 Allocation Documents .............................................................................................. 15

2.4.3.2 Cabling Documents ................................................................................................... 16

2.5 INSTALLATION ................................................................................................... 17 2.5.1 Mounting the stacks ...................................................................................................... 17

2.5.1.1 Anchoring the MD110 to the floor ........................................................................... 17

2.5.1.2 Anchoring the MD110 to the Wall ........................................................................... 19

2.5.2 Mounting the Main Distribution Frame ........................................................................ 20

2.5.3 System earthing ............................................................................................................. 20

2.5.4 POWER ........................................................................................................................ 21

2.5.4.1 Power Cabling without a PWM (external power) ..................................................... 21

2.5.4.2 Power Cabling with a PWM ..................................................................................... 22

2.5.5 Battery Backup Installation .......................................................................................... 26

2.5.5.1 Internal Battery ......................................................................................................... 26

2.5.5.2 Battery Switch and Battery Breaker .......................................................................... 28

2.5.5.3 Extended Battery Power ........................................................................................... 29

2.5.5.4 External Battery ........................................................................................................ 29

2.5.6 Alarm Panel .................................................................................................................. 31

2.5.7 Board Cabling ............................................................................................................... 33

2.5.7.1 MDF Cables .............................................................................................................. 34

2.5.7.2 Internal Cabling ........................................................................................................ 34

2.5.7.3 Analogue Board Cabling .......................................................................................... 35

2.5.7.4 Digital Board Cabling ............................................................................................... 35

2.5.7.5 S0 Terminal Board Cabling ....................................................................................... 36

2.5.7.6 Operator Console Cabling ........................................................................................ 36

2.5.7.7 Alarm Unit Cabling................................................................................................... 36

2.5.7.8 Analogue Trunk Board Cabling ................................................................................ 36

INSTALLATION


2.5.7.9 Digital Trunk Board Cabling .................................................................................... 36

2.5.7.10 ISDN Trunk Board Cabling ..................................................................................... 37

2.5.7.11 E&M Trunk Board Cabling ..................................................................................... 37

2.5.7.12 HDU/NIU Cabling ................................................................................................... 37

2.5.7.13 Music on Hold ......................................................................................................... 38

2.5.7.14 I/O Terminal and Modem ........................................................................................ 38

2.5.7.15 Through-connection at Power Failure or Processor Malfunction ............................ 38

2.6 INSTALLATION TESTING ................................................................................ 39 2.6.1 Prerequisites ................................................................................................................. 39

2.6.2 Preparatory Checks ....................................................................................................... 40

2.6.3 Power Equipment Test .................................................................................................. 41

2.6.4 Starting the System ....................................................................................................... 41

2.6.4.1 LPU Display Messages in Operation ........................................................................ 42

2.6.4.2 Checks and Measures after Unsuccessful Load of the System .................................. 42

2.6.5 Tests before entering exchange data ............................................................................. 43

2.6.5.1 Fault Identification .................................................................................................... 43

2.6.5.2 System Hardware Function Test ............................................................................... 44

2.6.5.3 System Handling Tests ............................................................................................. 44

2.6.5.4 Powering Down and Reload ..................................................................................... 45

2.6.6 Dumping ....................................................................................................................... 45

2.6.7 Tests after entering exchange data ................................................................................ 45

2.6.7.1 Extension and Operator Console Test ....................................................................... 45

2.6.7.2 External Line Test ..................................................................................................... 47

2.6.8 Feature Function Test ................................................................................................... 48

2.6.8.1 Music On Hold ......................................................................................................... 48

2.6.9 Post-Installation Measures ............................................................................................ 48

2.6.9.1 Safety Backup ........................................................................................................... 49

2.6.10 Covers ........................................................................................................................... 49

2.6.11 Fault Reporting ............................................................................................................. 50

INSTALLATION


Chapter 2 - Installation

2.1 INTRODUCTION

The majority of installed MD110 systems are one or two LIMs without a group switch.

This document is intended as course material for those who attend the installation course

for small MD110 systems, i.e. one or two LIMs without a group switch. It can also be used

as an installation manual after completed course.

Use the manual the first few times you install an MD110, then as a reference document as

you become familiar with the system. For a notebook, you can make a copy of the

Installation Checklist (Appendix 2), to ensure that you have not inadvertently skipped a

step in the installation process.

Keep in mind that additional sources are available to assist you. The ALEX CD-ROM for

ASB 501 04 offers about 50 binders worth of information that actually represents the total

installation material for the system. Additionally, Ericsson support is only a phone call

away.

Contents:

à Overview

This chapter gives you a general overview of the MD110 system and its parts. Of course, once

you are familiar with the MD110, you can skip this section.

à Facility Planning

This chapter describes the environmental requirements for proper operation of the MD110.

Basic rules for cabling and earthing are also reviewed.

à Installation Preparation

This chapter reviews recommended tools, common sense unpacking procedures and most

important, the cabling documentation provided with the system.

à Installation

This chapter explains the procedures necessary to install the basic MD110 system. Installation

documentation for peripheral equipment, such as D.N.A. Start, is supplied separately.

à Installation Testing

This chapter explains the procedures necessary to verify proper operation of the basic MD110

in the customer environment. Remember also to perform whatever tests are necessary to verify

operation of peripheral equipment, as specified in peripheral equipment documentation.

à Appendix 1 Circuit Board Descriptions

This appendix gives a short function description for some boards in the MD110 exchange and

a graphic showing the disposition of the board’s front connectors.

à Appendix 2 Installation Checklist This appendix provides a checklist to be filled in for each project. This ensures that all

installation activities for the basic MD110 system are completely and carefully executed.

INSTALLATION


2.2 OVERVIEW

2.2.1 Glossary of Terms

ACM All Contained Module

ALU2 ALarm Unit

BFU Battery Fuse Unit

BPOS Board POSition

DGS Data Generating System

D.N.A. Dynamic Network Administration

DSU Distributed Switch Unit

ELU Extension Line Unit

EMC ElectroMagnetic Compatibility

FBOX Function BOX (Filter)

HDU Hard Disk Unit

ICU2 Interception Computer Unit

IFM InterFace Module

IPU Input/outPut Unit

LBP LIM BackPlane

LIM Line Interface Module

LSU LIM Switch Unit

LPU5 LIM Processor Unit

MAG0-3 MAGazine 0-3

MDM Main Distribution Module

NIU Network Interface Unit

OAM Optional Applications Module

OPI OPerator Instrument

PBA Printed Board Assembly

PBM Power Battery Module

PSM Processor Switch Module

PU5DC DC/DC Converter

PWM PoWer Module

REU Ringing Equipment Unit

SIU Serial Interface Unit

TLU Trunk Line Unit

TMU Tone and Multi-Party Unit

INSTALLATION


2.2.2 General

The MD110 often consists of only one stack built of modules placed upon each other. It

may also contain an extra stack for power equipment. A stack can consist of up to four

modules. Each stack is mounted on the base. The right hand part of the module has a chute

for cabling. The uppermost module has a top cover of ABS plastic. The rear part of the

cover has a ventilation grating for heat dissipation.

The module stack is cooled by free convection. The magazines in a stack are cooled in

parallel, i.e. the evacuated air from each magazine is led via an air-duct behind the

magazines upward to the ventilation grating at the top of the stack.

The Line Interface Module (LIM) can consist of three types of modules, Processor Switch

Module (PSM), InterFace Module (IFM) and All Contained Module (ACM). For

electromagnetic interference protection the magazines contains a shielded cage with a

removable metal front cover. ACM is a PSM with batteries and an AC/DC unit.

Each PSM and IFM contains a magazine with board slots. At the rear of each slot is a

connector that is attached to a common backplane. The backplane is a printed circuit board

that contains the data and control system bus structure. The device bus carries speech and

data to and from the device boards. The process bus carries control data between the device

processors. Data is multiplexed onto these buses via time slot assignments to physical

board positions to allow maximum flexibility in the placement of device boards in the

magazine.

Certain device boards have fixed positions within specific modules. The remaining board

positions are given 8, 16, or 32 time slots. This architecture facilitates easy system

installation, flexible board placement and expansion.

The LIM switch can control 1024 time slots, divided into 256 time slots per magazine.

Each board position ending with a 0 has 32 time slots. Positions ending with 2 have 16

time slots and positions ending with 1 or 3 have 8 time slots.

The following figure shows how the board positions within a magazine can be used

depending on the required number of time slots per installed board:

00 10 20 22 30 32 40 42 50 52 60 62 63 70 71 72 73 Board position

32

32 3216

x 16

3216

x 16

3216

x 16

3216

x 16

3216

x 168

x x 8

32168

x x 8

x 168

x x 8

Alternatively

available

time slots

Explanation: Position 00 and 10 can accommodate a board requiring 32 or less time slots

each. Position 20-60 can share the time slots with the position on the right (16/16), and

positions 62-63, 70-73 can share the time slots 8/8.

If a board requiring 32 time slots is placed in position 20, 30, 40, or 50, the next board

position is blocked (x). If the same board is placed in position 60, the next two positions are

blocked and if placed in position 70 the next three positions are blocked. Boards requiring

16 time slots placed in position 62, 70 or 72 block the next board position.

INSTALLATION


2.2.3 Processor Switch Module (PSM)

All common control functions are handled by the LSU board in the PSM. The operating

system and allocation system hardware, as well as hard disk (software backup media) is

contained in the LBP20 magazine within this module. Memory capacity in the stackable is

64Mb and is available as an integral part of the LIM Processor Unit (LPU5).

There are 9 accessible universal board positions for interfaces of any type of internal or

external devices, e.g. extension line boards and trunk line boards, depending on system

configuration.

Voltage for ringing analogue telephones is provided either by the RG5DC unit, which also

replaces the PU5DC unit, or the Ringing Equipment Unit (REU) in the PSM. If the system

is without analogue telephones, the REU does not need to be installed.

In the PSM, the LBP20 magazine has fixed positions for the following circuit boards:

00 10 20 22 30 32 40 42 50 52 60 62 63 70 71 72 73

T

M U

N

I U

/ I

P

U

L

P U

5

x

x

L

S U

Not

used

D

S U

R

G 5

D C

01 10 19 28 37 46 55 64 73 82 91 100 109 118 127 136 145 154 163 170

= Position blocked by the board to the left

2.2.4 Interface Module (IFM)

The IFM provides switching for 256 time slots. The hardware for the IFM is contained in

the LBP20 magazine within the module. There are 17 accessible universal board positions

for interfaces of any type of extension, trunk access or other types of board, depending on

system configuration. Again, the PU5DC unit can be replaced by the RG5DC unit.

In the IFM, the LBP20 magazine has fixed positions for the following two circuit boards:

00 10 20 22 30 32 40 42 50 52 60 62 63 70 71 72 73

Not

used

D

S

U

P

U

5 D

C

01 10 19 28 37 46 55 64 73 82 91 100 109 118 127 136 145 154 163 170

2.2.5 Power Module (PWM)

The PWM is an internal power supply that converts mains 220-240V AC power to

-48VDC and interfaces with the PU5DC or RG5DC boards, which supply power in each

module. One PWM can support up to four modules (one PSM and three IFMs). It can be

equipped with four battery blocks that form a 26 Ah battery back-up, one battery fuse unit,

and two AC/DC units (12.5A each). This power supply will maintain operation of the

exchange for one to three hours in the event of mains power failure.

x

x

INSTALLATION


1. Battery with four battery blocks - 6/BKC 861 0030/04

2. Battery box SXK 106 4197/1

3. Battery fuse unit BFU2, BMG 906 01/2

4. AC/DC unit BML 351 041/1 or BML 231 001/1 (one or two units)

5. Chute for cables

2.2.6 Power Battery Module (PBM)

The PBM is a unit to be used when additional battery power is required to extend the

battery back up time. The unit can be equipped with one or two batteries. Each battery

contains four battery blocks and will extend the operation time of the exchange with

another 26 Ah in event of mains power failure, e.g. in total a maximum of 26 + 26 + 26 =

78 Ah.

1. Battery with four battery blocks - 6/BKC 861 0030/04

2. Battery box SXK 106 4197/1

3. Chute for cables

2.2.7 Stackable Module Build-Up

The following figure shows in which order the modules will be stacked, depending on the

types and quantity of modules in the system:

IFM IFM IFM

IFM IFM IFM IFM IFM

IFM IFM IFM PSM PSM IFM

PSM PSM PSM PWM PWM PSM PWM

IFM IFM

PSM IFM IFM

PWM IFM PWM IFM PWM

PBM PSM PBM PSM PBM

INSTALLATION


2.2.8 Configuration Capacity

Because of its modularity and flexibility, the MD110 can be installed in many different

configurations. As the number and use of extension lines, trunk lines and additional

equipment are specific for each installation, the configuration capacity is dependent on the

customer’s configuration.

2.3 FACILITY PLANNING

When installing an MD110, the following specific environmental conditions for proper

operation should be taken into consideration.

2.3.1 Temperature and Humidity

To prevent equipment damage and system degradation, the relationship between

temperature and air humidity should not cause condensation. After power is applied to an

MD110 system, the equipment and the ambient room temperature/relative humidity must

be stable within the operating ranges. Measurements should be taken at least 1.5 m above

floor level and at least 0.5 m from any heat-dissipating object.

Temperature Range: 5°C to 40°C 41°F to 104°F

Relative Humidity Range 20% to 80%

2.3.2 Heat Dissipation

The typical heat dissipation for the stackable LIM (four modules) is 115-350 Watts (393-

1195 BTU). The various LIM modules use convection cooling for heat dissipation without

using internal fans. This technique provides all the necessary cooling for most applications,

minimizing or eliminating the need for air conditioning if the ambient air temperature is

satisfactory.

2.3.3 Air Filtration and Ventilation

The type of air filtration required for proper operation depends upon the dust and other

particulate matter concentrated in the equipment room. If salt air, dust, smoke, corrosive

gases or other degrading pollutants are present in the atmosphere, a prefilter and a main

filter in the room ventilation intake is required.

2.3.4 Lighting

The MD110 should not be exposed to direct sunlight.

INSTALLATION


2.3.5 Floor Loading

Floor loading is based on an aisle working space of 1 m in front of the module stack or

cabinet and is derived from the total weight of a four-module stack.

Maximum weights PWM + PSM + IFM + IFM

PBM + PWM

PBM + PWM + PSM + IFM

178 kg

187 kg

251 kg

Typical floor load 180 kg/sq. m

Maximum floor load 260 kg/sq. m

2.3.6 Stackable Equipment Dimensions

Module Height Width Depth Maximum Weight (empty)

IFM 400 mm 600 mm 355 mm 32 kg

PSM 400 mm 600 mm 355 mm 32 kg

PWM 400 mm 600 mm 355 mm 71 kg with optional backup battery installed

PBM 400 mm 600 mm 355 mm 105 kg with two optional backup batteries installed

Base 230 mm 600 mm 355 mm 11 kg

2.3.7 Floor Plans

When considering a floor plan, it is necessary to anticipate the system growth at each site to

minimize future problems. Space requirements for customer supplied external power

equipment should be evaluated as well. In addition, the MD110 should not be installed in a

location where water sprinklers are present.

Some possible floor plans are shown in the following examples:

The stacks must be anchored to the floor or the wall depending on the floor plan used. To

ensure safe operation, adequate free space should surround the equipment. The free space

area requirements are:

Minimum aisle area in front of a module stack: 60 cm

Minimum free space on left and right side of each stack or row: 20 cm

Static electricity and electro magnetic radiation is harmful to the system, so make sure to

protect the system and yourself from that kind of disturbances by using anti static

wristband whenever touching a circuit, and allways keeping the steel front cover on the

magazines while in service.

INSTALLATION

LZU 10 8 12 29 R 1 A MD110 BC1 1 IMPLEMENT & MANAGE B ASIC INSTALL 1 1 0

2.3.8 Electrical Requirements

MD110 system operates on -48VDC that is normally supplied by rectifiers provided with

the system. The AC input power source to the rectifiers is 220-240VAC. Wall sockets must

be equipped with protective earthing.

Battery backup may also be provided in accordance with the customer's specification for

expected hours of operating time during failure of the main AC power source. If the -48V

DC power is supplied by the customer, ensure that the MD110 quality standards are met.

2.3.9 Earthing

The MD110 requires an isolated, single-point earth system. This electrical bonding is

centralized at the system earth bus bar. Continuity should measure less than, or equal to 4

ohms between the system earth bus bar and earth (<4 ohm earth).

The ideal single earth point is a dedicated, independent external earth point such as a

driven terminal, but a cold water pipe or principle building earth bar or plate are

acceptable. A proper external earth point should be connected to the exchange room earth

point of entry.

Note: Be sure to comply with local regulations.

2.3.10 Cabling

2.3.10.1 General

External cables to the stackable modules are routed through the uppermost module or

through an opening under the base. A chute on the right side of each module is used for

routing external cables and cables between other modules. All cable connectors are

accessible from the front of the module.

To eliminate noise or transient spikes, it is preferable not to place MD110 cabling in the

same conduit as non-MD110 cabling. Unshielded cabling can cause noise induction, which

can adversely affect the system’s performance. If necessary, EMI/RFI filters should be

installed to eliminate noise or transient spikes.

Note: To prevent disturbances to or from other electronic equipment, certain cables must be

wrapped to a toroid core. This is directed and shown in Chapter 5 Installation.

Take the following steps to ensure proper cable distribution, routing and terminating

techniques:

1. Complete all construction modifications to the exchange installation areas before

placing or installing any equipment (e.g. walls, floors, cable ducts, room-to-room

portals, sub-floor/overhead access holes, etc.).

2. Plan cable routing and lengths.

3. Minimize exposed cables.

4. Meet all applicable building codes, telephone company requirements and regulations.

Incoming cables are to be laid in a cable chute or clamped directly to the wall, and

then run downward to the top of the LIM, or from the floor in a raised floor system.

INSTALLATION


2.3.10.2 Cable Connectors

Plug-ended and plug-to-plug type cables are used. The cables are wire-wrapped or soldered

to connector units, which are divided into 1/4 sections. These connects to the front of the

boards. 1/4, 1/2, 3/4, and 1/1 cable connectors are used.

1/4 connector

1/2 connector

3/4 connector

1/1 connector

Front view of a circuit board

INSTALLATION


2.3.10.3 Labelling

Internal cables

Internal cables within the LIM are labelled with product codes made up of

letters and digits. The example beside shows the code for the 1000 mm

long cable between PU5DC in magazine 0 and PU5DC in magazine 1.

Each cable connector is equipped with a tag. On the top of the tag is the

host location to where the connector is attached. On the underside is the

receiver location to where the other end of the cable is attached. For

example, the top of the tag in the figure reads: 0A170*3

à 0 = Magazine number

à A = Top half of the connector on the board♦)

à 170 = Board position (PBA position in modules;

1 module = 2,54 mm)

à *3 = 1/4 section to which the cable connector is attached

This means that the connector is connected to the third 1/4 connector position of the top

half of the board in magazine 0, board position 170.

The underside of the same tag is labelled with the “to” position in the same LIM: 1A170*4

à 1 = Magazine number

à A = Top

à 170 = Board position

à *4 = 1/4 section to which the cable connector is attached

♦) An internal cable labelled B means that the cable is connected to the bottom half of the board.

Peripheral cables

Peripheral cables to MDF, modem etc., must be labelled using label set SVH 277 025/1.

This set is a standard set to be used for larger exchanges as well, e.g. only some of the

labels will be used.

The label for cables such as LIM to MDF and PCM-LINK to MDF,

indicates the position of the cable connector in the LIM. For example, a

cable to the MDF might be marked as follows:

à L1 = LIM number 1

à /1 = Cable number for the device board

Parameter values 1-40

à A = Cable connector parameter (A = connected to the device board)

The other end of the cable, at the MDF, must be labelled with the same figures but with

(M) instead of (A). See figure.

Attach the label in the MDF side i.e. as shown in the figure.

Instructions on how to label the various cables to MDF are specified in the supplied

document 2/1951-IPA 103 xxxx (customer specific numbered).

INSTALLATION


The connectors for cables via a function box, LIM-FBOX-MDF, are named with cable

connector parameters as described in the two examples in the following figures:

Board type NIU, IPU, SIU, or ICU2

Connector marked (A) is connected to (C)*1 and (C)*2. Connector marked (B) is connected to (C)*3 and (C)*4.

Board type TLU or FTU with two individuals

L1 = LIM number 1

/41 = Cable number from the device board Parameter values: 41-55

(A) = Cable connector Parameter values:

A = connector in device board B = connector in device board C = to MDF cable A2 = connector in device board B2 = connector in device board C2 = to MDF cable D = MDF cable to FBOX cable M = in the MDF

INSTALLATION


2.4 INSTALLATION PREPARATION

2.4.1 Tools

In addition to conventional installation tools, the following are recommended:

à LSY 147 01 Opener for Vikex cases

à LTD 117 71 Tool for dismounting cable connectors

à LSA 126 11/20 Screwdriver (TORX)

à LTD 117 02 Handle for extracting printed boards from a magazine

LTD 117 12 Button for extracting printed boards

à LYB 250 01/14 Discharge wristband

Warning: Drilling machines, soldering irons, etc., must be of double-insulated type.

Static Discharge Wristbands

The use of static discharge wristbands are mandatory when installing the MD110. One jack

is placed at the bottom of each PSM and IFM module. The jacks are designed for banana

plugs. The wristbands are not delivered with the module stack.

Note: The wristband must always be used when removing a magazine cover or when touching a

printed board (applies also to unconnected boards)!

2.4.2 Unpacking

1. The exchange is delivered with the modules mounted together in stacks. The stacks

are equipped and shipped in a number of cases. Ensure that the correct cases have

been delivered by checking that the case markings are equivalent to the information

given in the delivery document or shipping specification.

2. Open the cases and the protective plastic wrapping.

3. Remove the module front covers. The keys to open the module covers are attached to

the top cover of the LIM. After removing the module covers, the EMC magazine

covers are exposed.

4. Remove the EMC magazine front covers by first unscrewing the two locking screws

on the covers.

5. Check that the delivered equipment corresponds with the delivery documents.

6. Check that the equipment has not been damaged during transport.

7. If equipment has been damaged or does not correspond with delivery documents,

report this immediately to your local Ericsson representative.

8. If any equipment is missing, report this immediately to your Ericsson representative.

INSTALLATION


2.4.3 Delivery Documents

The site plant documents shipped with the system include several documents that are

critically important to the cabling of the system. The cabling documents are in the form of

standard documents and exchange-specific documents.

2.4.3.1 Allocation Documents

Document 1951-IPA 103 xxxx (customer specific numbered) is an allocation graphic,

which is basically a front facing drawing of the LIM as it should be equipped, showing

magazines and positions for each board allocated for that LIM. The following figure is a

copy of an allocation graphic for a typical MD110 installation. Check that each board is

shown with both board position slot, the board type, and the Printed Board Assembly

(PBA) position which is how the board is located using the module ruler at the bottom of

the magazine.

00 10 20 22 30 32 40 42 50 52 60 62 63 70 71 72 73

Board position slot

A

T

L

U

7

6

T

M

U

E

L

U

2

8

E

L

U

2

8

T

L

U

7

5

T

L

U

7

6

I

C

U

2

A

L

U

2

S

I

U

T

L

U

7

5

T

L

U

2

1

x

x Not

used

D

S

U

P

U

5

D

C

LIM 1

MAG1 (LBP20)

B F F F

F = Function box

required

01

10

19

28

37

46

55

64

73

82

91

100

109

118

127

136

145

154

163

170 PBA position (modules)

00 10 20 22 30 32 40 42 50 52 60 62 63 70 71 72 73

Board position slot

A

T

M

U

E

L

U

2

8

E

L

U

2

8

E

L

U

2

8

E

L

U

2

8

E

L

U

2

9

E

L

U

2

9

N

I

U

x

x

L

P

U

5

x

x

H

D

U

7/2

L

S

U

Not

used

D

S

U

R

G

5

D

C

LIM 1

MAG0 (LBP20)

B F

F = Function box

required

01

10

19

28

37

46

55

64

73

82

91

100

109

118

127

136

145

154

163

170 PBA position (modules)

PWM

INSTALLATION


2.4.3.2 Cabling Documents

Connection of internal cabling

Allocation table 1/1951-IPA 103 xxxx (customer specific numbered) is an instruction for

the connection of internal cabling within the cabinets. The document lists the internal

cables that are individual for a specific exchange. This document gives the cable product

number or the function box number, the board type to which the cable connects, the

magazine number, and the host and receiver label. An example is as follows:

Cable PBA MAG TS From To Note

ZGK 205 002/1 TLU21 1 72 L1/1A136*4(B) D*3(C) L1/42

ZGK 205 003/5 ICU2

SIU

SIU

NIU

NIU

1

1

1

0

0

62

70

70

60

60

L1/1A100*1(B)

L1/1A118*1(B)

L1/1B118*4(A)

L1/0A82*1(B)

L1/0A82*2(A)

C*3

C*3

C*1

C*3

C*1

L1/43

L1/44

L1/44

L1/41

L1/41

TSR 901 0441/200 HDU 0 62 L1/0B100*3 0B82*3 HDU-NIU

Example: To the NIU board in magazine 0, time slot (TS) 60, the function box ZGK 205 003/5 is connected

via the A and B connector on the function box to the two most upper connectors (*1 and *2; connector B to

the upper most outlet A*1 on NIU). The other end of the function box has a connector C which must be

connected with an external cable with cable number 41. See paragraph 3.10.3, Labelling.

Connection of external cables

Allocation table 2/1951-IPA 103 xxxx (customer specific numbered) is an instruction for

the connection of external cables, such as cabling from cabinets to MDF and other

peripheral equipment. This document gives the LIM number, the cable part number, the

board type, the board's magazine and time slot, a host location that will either be a function

box or the actual board front, a receiver location which is often MDF, Terminal or Modem,

the cable on the outbound connector, and the pairs to be punched down. An example:

Cable PBA Mag TS From To Label Pair

TSR 204 0411/16000 TLU21 1 72 L1/42(D) MDF L1/42 (M) 1-4

TSR 901 0481/20000 TLU76 1 00 B01*4 MDF L1/3 (M) 1-4

TSR 902 0404/10000 ICU2

NIU

1

0

62

60

L1/43(C*3)

L1/41(C*3)

Terminal

Terminal

TSR 902 0438/10000 SIU 1 70 L1/44(C*3)

TSR 902 0492/32000 ELU28

ELU28

ALU2

ELU28

ELU28

ELU28

ELU28

ELU29

ELU29

1

1

1

0

0

0

0

0

0

20

22

63

20

22

30

32

50

52

B19*1

B28*1

B109*1

B19*1

B28*1

B37*1

B46*1

B73*1

B91*1

MDF

MDF

MDF

MDF

MDF

MDF

MDF

MDF

MDF

L1/12 (M)

L1/13 (M)

L1/1 (M)

L1/8 (M)

L1/9 (M)

L1/10 (M)

L1/11 (M)

L1/4 (M)

L1/5 (M)

1-4, 6-9, 11-14, 16-19

1-4, 6-9, 11-14, 16-19

1-4, 6-9, 11-14, 16-19

1-4, 6-9, 11-14, 16-19

1-4, 6-9, 11-14, 16-19

1-4, 6-9, 11-14, 16-19

1-4, 6-9, 11-14, 16-19

1-4, 6-9, 11-14, 16-19

1-4, 6-9, 11-14, 16-19

TSR 901 0450/32000 TMU

TLU75

TLU75

0

1

1

10

42

71

B10*1

B64*1

B127*1

MDF

MDF

MDF

L1/2 (M)

L1/6 (M)

L1/7 (M)

1-4, 6-9

1-4, 6-9

1-4, 6-9

Example: Cable TSR 902 0404/10000 is used to connect the I/O terminal to the NIU board. The cable must

be connected to the C*3 outlet at the connector from the function box. The cable must be marked L1/41 =

LIM 1, cable number 41. See paragraph 3.10.3, Labelling.

INSTALLATION


2.5 INSTALLATION

2.5.1 Mounting the stacks

The MD110 can be mounted in a variety of ways. These are rules to follow, which are

either specified by the customer, or by local regulations. The MD110 can be anchored to

the floor or the wall.

Note: It is not recommended to leave the stacks freestanding as they could fall over and cause

personal injury and/or be damaged.

2.5.1.1 Anchoring the MD110 to the floor

Mounting set NTM 144 152 must be used. The set contains the following material:

à Bar SXA 112 4439/1 (2 pcs)

à Washer SCA 361 02 (2 pcs)

à Expander screw NSV 905 1005 (4 pcs)

à Screw SBH 126 165/03 (4 pcs)

à Plug NSV 984 06 (4 pcs)

à Washer SXA 112 4586/*) (6 pcs, 2 pcs/thickness)

*) Three variants based on thickness (2x0,5 mm, 2x1 mm and 2x2,5 mm). To be used for

compensation if the floor is sloping or rough.

Mounting of left base viewed from the front. (Right base: the same but mirrored)

INSTALLATION


1. Ensure that the floor position selected is free from pipes, wiring, etc. in the area to be

drilled.

2. Place the supplied template on the floor and mark the positions to be drilled. The first

figure shows the distances between the holes. The second figure shows how to use the

template. The crossed-out holes must not be drilled!

Holes for stack 1 Holes for stack 2 FRONT

Template

3. Drill the holes. The holes should be as deep as the length of the screws.

4. If screws SBH 126 165/03 is to be used: Insert the plugs NSV 984 06 in the holes.

5. Mount the bars to the floor. If required, level the bars by using washers

SXA 112 4586/1, SXA 112 4586/2, or SXA 112 4586/3.

6. Tighten the screws until a distance of 6 mm remains between the bar and the screw

head.

7. Lift the stack above the bars and lower it onto the bars. Allow the screw-heads to

protrude through the key-hole in the bottom of the mounting

fixtures. Then, slide the stack backwards.

8. Install washers SCA 361 02 in the largest portion of the keyhole to

prevent the stack from moving forward.

9. Secure the stack to the floor by tightening the screws.

INSTALLATION


2.5.1.2 Anchoring the MD110 to the Wall

The mounting set NTM 144 148 must be used. The set contains the following material:

à Bracket SXA 112 4440/1 (1 pc)

à Screw 03/SBA 121 040/0120 (2 pcs)

à Nut SBM 146 040/03 (2 pcs)

à Screw SBH 111 419/03 (2 pcs)

à Plug NSV 984 06 (2 pcs)

The feet and their nuts for the stack are provided in mounting set NTM 144 146.

1. Screw the nuts onto the feet provided in mounting set NTM 144 146.

2. Screw the feet from NTM 144 146 into the base of the stack.

3. Adjust the feet until the stack is level.

4. If the system consists of two stacks: Install brackets SXA 112 4471/1

from mounting set NTM 144 149 to connect the stack and the PWM

and/or PBM stack to one another for additional security.

5. Insert the nuts SBM 146 040/03 in the holes of the rear frame (just

below the position for the bracket SXA 112 4440/1).

6. Attach the bracket SXA 112 4440/1 with the screws provided, to the top of the rear

frame.

7. Drill holes in the wall that correspond to the holes in the bracket.

8. Insert plugs into the holes and secure the stack to the wall with the screws provided.

TOP VIEW SIDE VIEW

Module frame Alternative mounting Wall Module frame

*) By using the lower holes, the space between wall and stack can be increased by 17 mm

INSTALLATION


2.5.2 Mounting the Main Distribution Frame

1. Put the Main Distribution Frame (MDF) in a convenient position and secure it to the

wall or floor.

2. If required, install protectors to guard against lightning damage.

2.5.3 System earthing

The LIM, the MDF, and any peripheral equipment must be connected to a good earth

source to ensure reliable system operation. The system earth must be less than 4 ohms. Be

sure to adhere to local regulations when earthing the system.

To Earth the System:

1. Locate cable TRE 990 136/1 connected to the earthing lug on the

bottom right of the bottom module.

2. Connect the free end of the cable with the included earth clamp

930 590 to earthing cable TBK 101 01. See figure below.

3. If installing a separate PWM or PBM, connect the earthing lug for

this stack in parallel.

4. Attach the earthing cable using terminal 105 4546/1 to the main

earthing bar 105 4545/1 in the MDF. This bar is in turn connected to

a protective earth installed in the exchange room during construction

(cable to be obtained locally; dimension according to local

regulations). Use an earth tester to ensure that differences in

potential do not exist between earthing points.

5. Ensure that the MDF is connected to the earthing bar. If not, connect the MDF by

using cable TBK 101 01.

INSTALLATION


2.5.4 POWER

2.5.4.1 Power Cabling without a PWM (external power)

1. Locate the PU5DC or RG5DC board in each magazine in the LIM

and attach the filter unit of the power cable TSR 903 0216/12000

between two of the metal tongues extending from the magazine

below each board as shown in the figure.

2. Connect the power cable to the Power in terminal of the power unit

in each magazine in the LIM.

3. Use labels from label set SVH 277 025/1 and label the cable to each magazine as

follows:

â Magazine 0: BFU-MAG0 L3-PU5DC/B*2

â Magazine 1: BFU-MAG1

L2-PU5DC/B*2


L1-PU5DC/B*2


L4-PU5DC/B*2

4. Use the corresponding label at the other end

of each cable (the end without a connector).

Note: Do not cut the cable shorter than a

minimum length of 8 m, otherwise a

short circuit will disturb the function

of the rest of the exchange. Lead the

cable not used back and forth a few

times and tie the loops together:

5. Connect the cables via a fuse or a distribution unit to the -48 V DC rectifier according

to the manufacturer instructions.

To external rectifier via a fuse or a distribution unit

Filter unit

INSTALLATION


2.5.4.2 Power Cabling with a PWM

The PWM might be equipped with either one or two AC/DC units.

Note: For AC/DC units, the exchange is delivered with either a BML 351 041/1 (black front) or a

BML 231 001/1 (grey front). The two types are completely compatible, there are just minor

differences in how to connect cables. Both types are shown below.

1. Locate the PU5DC power cable (TSR 903 0216/2500) associated with each magazine

in the LIM. Label both ends of the cable with the associated magazine number.

2. Attach the grey wires to the screw strip labelled 0V on the BFU2 in the PWM.

3. Attach the black wires to the wire strip labelled -48V on the BFU2 in

the PWM, per the following as is applicable to the MD110 you are

installing:

L1 = magazine 2 (MAG2)




4. Connect the connector of cable TSR 903 0250/19 to the

-48V +0V output terminal on the AC/DC unit in the

left-hand position, as shown in the figures below.

Note: Type of AC/DC units.

5. Connect the black wire to the R1 slot on the RECT. -48V wire connector on the

BFU2.

6. Connect the grey wire to the first smaller screw on the wire strip labelled 0V on the

BFU2.

AC/DC unit(s) type BML 351 041/1 is used. AC/DC unit(s) type BML 231 001/1 is used.

7. If two AC/DC units are installed, connect the connector of a second cable

TSR 903 0250/19 to the -48V +0V output terminal on the AC/DC unit in the right-

hand position, as shown in the figures above.

Note: Type of AC/DC units.

To magazines

INSTALLATION


8. Connect the black wire of this second cable to the R2 slot on the RECT. -48V wire

connector on the BFU2.

9. Connect the grey wire of this second cable to the second smaller screw on the wire

strip labelled 0V on the BFU2.

10. Wrap the AC/DC mains power cord

around a toroid core ring STF 145 01

three times, as shown in this figure.

Use one toroid core per cord when

two AC/DC units are installed.

11. Plug the power cord into the power supply in the PWM.

12. Attach the cable holder SES 121 01 to

the bottom front of the AC/DC unit with

the existing screw.

13. Insert the cord into the cable clamp SET 103 01.

Installation of Signalling Cables

A Termic probe cable TSR 901 0311/800 or TSR 901 0319/800 including a termic probe

RNV 991 3017 must be connected to the AC/DC unit. The type of cable depends on the

type of installed AC/DC unit. The termic probe must be installed to the top of the batteries

in the PWM. This is described later in chapter 5.5.1 Internal Battery.

If one AC/DC unit is used:

1. Wrap the termic probe cable around a toroid core ring STF 145 01 three times, as

shown in the figure below.

2. Around the same ring, also wrap the signalling cable TSR 901 0496/20000 three

times as shown in the figure.

3. Plug the termic probe cable to the AC/DC unit as shown in the figure.

4. Plug the signalling cable TSR 901 0496/20000 to the AC/DC unit as shown in the

figure. The installation of the other end of this MDF cable is described later in

Chapter 5.6 Alarm Panel.

5. Attach a holder SES 121 01 to the top front of the AC/DC unit with the existing

screw.

6. Attach the toroid ring to the holder with a cable clamp SET 103 01.

7. Separately secure the two cables with cable clamps as shown in the figure.

Mains power cord RPM 945 303* *)Power cord part number will differ in different markets

Cable holder SES 121 01 and cable clamp SET 103 01

Toroid core STF 145 01

INSTALLATION


Termic probe RNV 991 3017 Termic probe RNV 991 3017

If two AC/DC units are used:

1. Wrap the termic probe cable around a toroid core ring STF 145 01 three times, as

shown in the figure below.

2. Around the same ring, also wrap the TSR 901 252 0102/600 cable three times as

shown in the figure.

3. Plug the termic probe cable to the AC/DC unit to the left as shown in the figure.

4. Plug the TSR 901 252 0102/600 cable to the same AC/DC unit as shown in the

figure.

5. Attach a holder SES 121 01 to the top front of the AC/DC unit with the existing

screw.

6. Attach the toroid ring to the holder with a cable clamp SET 103 01.

7. Separately secure the two cables with cable clamps as shown in the figure.

8. Wrap the other end of the TSR 901 252 0102/600 cable around another toroid core

ring STF 145 01 three times, as shown in the figure below.

9. Around the same ring, also wrap the TSR 901 0496/20000 cable three times as shown

in the figure. The installation of the other end of this MDF cable is described later in

Chapter 5.6 Alarm Panel.

10. Plug the TSR 901 252 0102/600 cable to the AC/DC unit to the right as shown in the

figure.

11. Plug the TSR 901 0496/20000 cable to the same AC/DC unit as shown in the figure.

12. Repeat steps 5, 6, and 7 for the second AC/DC unit to finish the procedure.

INSTALLATION


Termic probe RNV 991 3017

Termic probe RNV 991 3017

Material Requirements

à Toroid core STF 145 01 2 pieces in each package NTM 179 04/112 and

NTM 179 04/110

à Cable clamp SET 103 01 2 pieces in each package NTM 179 04/112 and

NTM 179 04/110

à Cable holder SES 121 01 2 pieces in each package NTM 179 04/112 and

NTM 179 04/110

à Mains power cord RPM 945 303 Product number will differ depending on

market

à Cable

TSR 901 0311/800

or

TSR 901 0319/800

1 piece in package NTM 179 04/112

Separately delivered

à Termic probe RNV 991 3017 1 piece in package NTM 179 04/112

à Cable TSR 901 0496/20000 Signalling cable to MDF

à Cable TSR 252 0102/600 1 piece in package NTM 179 04/110

à Cable clamp SET 103 01 6 pieces in package NTM 179 04/112 and

1 piece in package NTM 179 04/110

à Holder SES 121 01 1 piece in each package NTM 179 04/112 and

NTM 179 04/110

NTM 179 04/112 is used for AC/DC unit No. 1 (left position) and NTM 179 04/110 is

used for AC/DC unit No. 2 (right position when two AC/DC units are installed).

INSTALLATION


2.5.5 Battery Backup Installation

The MD110 may be supported by internal or external battery backup depending on

customer preferences.

2.5.5.1 Internal Battery

The internal 48V battery is housed in the PWM. The battery consists of four 12 V battery

blocks. If extended battery backup time is required, one or two extra 48V batteries are

housed in the PBM. For safety reasons the battery blocks are not installed on delivery.

The battery blocks are to be installed and cabled as follows:

1. Place the battery breaker on the BFU2 in the PWM in the off

position.

2. Place the battery switch on the battery boxes in the off position.

3. Remove the battery box cover plate. Two of the screws must be

reached through the two holes to the left on the cover plate.

4. Cable each pair of batteries in series with cables TRE 990 122/2 as

shown in the figure.

Note: Fasten the cable terminators to the battery poles in such a

way that no part of the uninsulated terminator sticks out from the

battery (to prevent risk of short circuits when the batteries are slid

into the compartment).

5. Place each pair of cabled battery blocks on the shelf in the battery

box. In order to complete the remaining cabling, do not push the battery blocks to the

back of the box.

6. Connect the remaining cables to the terminals and terminal blocks as shown in the

following figure. Be sure to respect battery polarity.

7. Protect the battery terminals with the insulation covers fastened at the end of each cable.

8. In the PWM only: Place the termic probe RNV 991 3017 at the top of the battery

blocks and clamp the probe cable from the AC/DC unit to a battery cable with cable

clamp SET 103 01 as shown in the figure. Depending on the type of AC/DC unit, the

probe cable is either of type TSR 901 0319/800 or of type TSR 901 0311/800.

9. Slide the battery to the rear of the compartment.

10. Keep the battery box covers open.

12V Battery block

To AC/DC (PWM only)

Battery Switch

INSTALLATION


Wire Connector

Material Requirements for PWM:

à Battery block 6/BKC 861 0030/04 4 pieces

à Cable clamp SET 103 01 1 piece in package NTM 179 04/112

à Cable TRE 990 122/2 2 pieces in package SXK 106 4197/1

à Cable TSR 901 0311/800 1 piece from AC/DC unit

à Cable TRE 990 122/3 1 piece in package SXK 106 4197/1

à Front plate SXK 106 4203/1 1 piece in package SXK 106 4197/1




Material Requirements for PBM:

à Battery block 6/BKC 861 0030/04 4 pieces or 8 pieces depending on customer

preferences

à Cable clamp SET 103 01 2+2 pieces in packages SXK 106 4197/1

à Cable TRE 990 122/2 2+2 pieces in packages SXK 106 4197/1

à Cable TRE 990 122/3 1+1 piece in packages SXK 106 4197/1

à Front plate SXK 106 4203/1 1+1 piece in packages SXK 106 4197/1




INSTALLATION


2.5.5.2 Battery Switch and Battery Breaker

1. Connect the end of cable TRE 990 147/2 with the connectors to the battery switch on

the inside of the battery box door, as shown in the figure.

2. Split and connect the other end of the cable to the alarm terminal on

the BFU2. The polarity of this cable is irrelevant.

3. Attatch the connector end of cable TRE 990 156/1 to the

connection panel labelled BATTERY on the BFU2, as shown in the

figure. The grey lead goes on top. The black lead goes on the

bottom.

4. Strip and connect the other end of the cable to the wire connector on the battery box

door. The grey wire is to be inserted in the outer connector labelled 0V. The black

wire in the inner connector labelled

-48V.

5. Replace the battery box cover

plates.

6. Place the battery switch on the battery box in the ON position.

7. Place the battery breaker on the BFU2 in the ON position.

Material Requirements:

à Cable TRE 990 147/2 1 piece in package NTM 179 04/112

à Cable TRE 990 156/1 1 piece in package NTM 179 04/112

To connect the cable: 1. Open with a small screwdriver 2. Fit the cable

Battery Case Cover

INSTALLATION


2.5.5.3 Extended Battery Power

If the installation requires extended battery power to extend battery backup time, a PBM

will be provided. To install the batteries, see Chapter 5.5.1, Internal Battery. Complete the

following to connect the PBM to the BFU2 in the PWM:

1. Check that the switch BATTERY BREAKER on the BFU2 in the PWM

and the battery switch on the battery case covers are in OFF position

(O), as shown in the following figure.

2. Connect the power cables TFK 251 325 to the terminals on the front

covers of the PBM batteries.

3. Check that the alarm cables TRE 990 147/1 are connected to the switch on the front

covers of the battery boxes in the PBM.

4. Clamp the power cable and the alarm cable from the left battery in the PBM to the

module as shown in the following figure.

5. Cut and connect the other end of the power cables to EXT1 and EXT2 (black cords)

and the 0V (grey cords) terminals on the BFU2. Leave 0.5 m extra cable in the cable

chute.

6. Cut and connect the other end of the alarm cables to the alarm terminal on the BFU2.

Leave 0.5 m extra cable in the cable chute. The polarity of the cables is irrelevant.

7. Turn on the switches on the battery boxes to ON position (I).

8. Switch on the BATTERY BREAKER on the BFU2.

Material Requirements:

à Cable clamp SET 103 01 2+2 pieces in packages SXK 106 4197/1

à Cable TRE 990 147/1 2 pieces

à Cable TFK 251 325 3 m, to be cut 2x1,5 m

2.5.5.4 External Battery

If the installation requires external battery instead of internal battery, complete the

following:

1. A battery switch unit including a battery fuse (minimum 50 A) must be installed close

to the battery as shown in the following figure. (This unit is not provided.)

Maximum distances: 1 m from the battery and 25 m from BFU2 in the system.

2. Using 10 mm² power cable (not provided), connect the battery blocks (positive to

negative), as shown in the following figure.

3. Connect the battery to the battery switch unit (negative to the fuse and the switch).

4. Using cable TFK 251 325, connect the black cord of the cable to the -48V terminal

EXT1 on the BFU2 unit, as shown in the following figure.

Battery Case Covers Cable clamps SET 103 01

INSTALLATION


5. Connect the grey cord of the cable to a 0V terminal on BFU2 as shown in the

following figure.

6. Cut the cable TFK 251 325 to a suitable length depending on the distance between the

battery and the BFU2.

Note: It is not permitted to loop the cable.

7. Connect the other end of the cable to a battery switch. The black cord is to be

connected to the switch and the fuse (-), the grey cord to the other terminal (+), as

shown in the following figure.

Note: For security reasons it is not permitted to exclude the external

battery switch and battery fuse!

External (not provided) Battery Switch and Battery Fuse (minimum 50A)

Cable to be obtained locally

INSTALLATION


2.5.6 Alarm Panel

1. Mount the alarm panel KNH 8315 and the Watch Dog panel KNH 8326 on the wall

near the MDF or in the location requested by the customer.

2. Connect the cables between the two panels and the ALU2 block on the MDF, as


3. Insert alarm labels 383 720 (or create your own labels) in alarm covers 355 848 and

attach to the panel. Alarm 4 is at the top. Alarm 0 at the bottom.

4. Connect the cable block for alarm and watch dog panels to the ALU2 block in the

MDF, as shown in the following figure.

Alarm Panel MDF

BN = Brown OR = Orange RD = Red GN = Green BL = Blue WH = White

INSTALLATION


Connections for Power Failure Alarms via the Alarm Panel

The following applies to the PWM only. If you are using a rectifier or other source, follow

the manufacturer’s instructions.

1. Connect cable TSR 901 0496/20000 to the lower part of the contact unit on the

AC/DC unit in the PWM, as shown in the figure below.

2. Punch down the other end of the cable on an MDF block. Remember to label and

number the block.

3. Connect the AC/DC cable block to the ALU2 MDF block, as shown in the following

figure.

4. Connect cable TSR 901 0314/20000 to position TEST of the contact unit on the

BFU2 in the PWM, as shown in the figure below.

5. Punch down the other end of the cable on an MDF block. Remember to label and

number the block.

6. Connect the BFU2 block to the ALU2 block, as shown in the following figure.

MDF

BN = Brown OR = Orange WH = White GN = Green BL = Blue YL = Yellow BK = Black AL1 = Mains power has failed AL2 = Low battery voltage AL3 = Automatic 48V switch off AL4 = Manual switch off of 48V AL5 = Battery power has failed

INSTALLATION


2.5.7 Board Cabling

Before attaching the connector to the board, position the cable slide attachment (see the

figure) between two of the metal tongues that extend from the magazine for earthing the

shield of the cable.

Board LIM magazine

To avoid bending the contact pins when inserting the connector onto the board, insert the

guide pins on the connector into the board slots simultaneously. If you insert the bottom

guides first, followed by the upper, the contact pins may bend.

All the boards are connected using prefabricated cable. The cables must be separated. The

cut ends are to be connected to the MDF blocks, except for the trunk boards (TLU76)

which are sometimes connected directly to the network termination equipment of the

public network. Label both ends of the cables to simplify maintenance. It is also

recommended that the blocks in the MDF should be numbered for easy reference.

Note: In order to fulfil the EMC regulations, ensure that the minimum length of the MDF cable is

3.5 m.

Cable slide attachment

INSTALLATION


2.5.7.1 MDF Cables

The following is a guide to help understand the colour coding. The cables provided for the

boards are 8-, 16-, or 24-pair cables. Many cables have connectors in both ends. If this is

the case, cut the cable in half before installing. The figure shows the color-to-pin layout in

the connector end, to consider when punching the wires on the MDF blocks. Remember to

number the blocks and label them with the board name and equipment position.

8-Pair Cable 16-Pair Cable

TSR 901 0450/32000 TSR 901 0492/32000

RD

BN

RDOR

WHBN

WH

OR

RD

GN

RDBL

WHGN

WH

BL

Pair

9

7

4

2

Pair

8

6

3

1

a c

02

04

06

08

10

12

14

16

02

04

06

08

10

12

14

16

YL

BN

YLOR

BK

BN

BKOR

RD

BN

RD

OR

WH

BN

WHOR

YL

GN

YLBL

BK

GN

BKBL

RD

GN

RD

BL

WH

GN

WHBL

Pair

19

17

14

12

9

7

4

2

Pair

18

16

13

11

8

6

3

1

a c

02

04

06

08

10

12

14

16

18

20

22

24

26

28

30

32

02

04

06

08

10

12

14

16

18

20

22

24

26

28

30

32

24-Pair Cable

TSR 901 0488/32000

The figure on the right shows how to identify the different pairs in a

24-pair cable. Pairs 1-4, 6-9 and pairs 21-24, 26-29 has the same wire

colours and are identified by a blue thread and an orange thread

wrapped around the pairs.

2.5.7.2 Internal Cabling

Internal cables between boards are installed on delivery

and should normally not be removed. If for any reason the cables are

removed, the following figure shows their original position.

MAGAZINE 3

YL = Yellow

BK = Black

RD = Red

WH = White

BN = Brown

OR = Orange

GN = Green

BL = Blue

YL

BN

YL

OR

BKBN

BK

OR

RD

BN

RDOR

WH

BN

WH

OR

YL

GN

YL

BL

BK

GN

BKBL

RD

GN

RD

BL

WH

GN

WH

BL

Pair

19

17

14

12

9

7

4

2

Pair

18

16

13

11

8

6

3

1

a b c

02

04

06

08

10

12

14

16

18

20

22

24

26

28

30

32

02

04

06

08

10

12

14

16

18

20

22

24

26

28

30

32

RDBN

RDGN

RD

OR

RD

BL

WH

BN

WH

GN

WHOR

WHBL

Pair

29

28

27

26

24

23

22

21

a b c

The numbering of cable pairs are: 1-4, 6-9, 11-14, 16-19, 21-24, and 26-29

(Standard numbering of Ericsson. Numbering might differ locally.)

INSTALLATION


MAGAZINE 2

MAGAZINE 1

MAGAZINE 0

2.5.7.3 Analogue Board Cabling

ELU29 cabling to the MDF uses prefabricated cable TSR 901 0492/32000. This cable type

is delivered with connectors in both ends and should be cut halfways into two separate

cables and be used for two boards. A parallel telephone or a bell can be connected to an

analogue extension line. Up to four telephones/bells can be connected in parallel to an

analogue extension port.

2.5.7.4 Digital Board Cabling


is delivered with connectors in both ends to be cut into two separate cables and be used for

two boards. Only one telephone can be connected per line and the line must not have any

open cable ends connected in parallel. The maximum permitted distance between the board

and a system telephone is 1000 m.

INSTALLATION


2.5.7.5 S0 Terminal Board Cabling



two boards.

2.5.7.6 Operator Console Cabling

The standard console for MD110, OPI-II (DGF 220 10/1) and the small console OPI3214

(DBC 214 01/01041) are both to be connected to the ELU28. The maximum permitted

distance between the board and the operator console is 1000 m. Only one operator console

may be connected to each line.

Note: The above information is not applicable if using D.N.A. Operator Workstation. Please refer

to D.N.A. documentation for installation information.

2.5.7.7 Alarm Unit Cabling

ALU2 cabling to the MDF uses prefabricated cable TSR 901 0492/32000. This cable type


two boards.

2.5.7.8 Analogue Trunk Board Cabling

TLU75 cabling to the public exchange (bypassing the MDF) uses prefabricated cable

TSR 901 0450/32000. This cable type is delivered with connectors in both ends to be cut

into two separate cables and be used for two boards.

2.5.7.9 Digital Trunk Board Cabling

TLU76 cabling to the public network is shown below:

Coax cable 75Ω Pair cable 120Ω Network Terminator Equipment

Only one of the cables is to be connected to the TLU76 board

The type of cable depends on market regulations.

To Public Network

INSTALLATION


2.5.7.10 ISDN Trunk Board Cabling

TLU 79 cabling to the public exchange (bypassing the MDF) uses prefabricated cable

TSR 901 0450/32000. This cable type is delivered with connectors in both ends to be cut


2.5.7.11 E&M Trunk Board Cabling

TLU80 cabling to the public exchange (bypassing the MDF) depends on whether or not

R-wires are to be used. TLU80 without R-wires uses prefabricated cable

TSR 901 0492/32000 and TLU80 with R-wires uses prefabricated cable

TSR 901 0488/32000. Both cable types are delivered with connectors in both ends to be cut


2.5.7.12 HDU/NIU Cabling

1. Insert the HDU into the magazine according to the allocation graphic document, see

Chapter 4.3.1, Allocation Documents.

2. Insert terminator plug RNV 903 001/1 in the bottom half of the SCSI connection

block of HDU, as shown in the following figure.

3. Using interface cable TSR 901 0441/200, connect the NIU board to the HDU board as


Switch

SCSI SCSI Connection Connection

Note: The cable TSR 901 0441/200 must be placed above the metal tongues behind all other

cables (to ensure that the system fulfils the EMC regulations).

INSTALLATION


2.5.7.13 Music on Hold

1. Connect the connector on cable TSR 901 0450/32000 to the TMU board. This cable

type is delivered with connectors in both ends to be cut into two separate cables (one

cable to be used for TMU, the other part for another type of board using the same type

of cable). If there is more than one TMU board in the LIM, the cable must be

connected to the lowest positioned board (MAG0) within the LIM. For the TMU front

connector disposition, see Appendix 1, Circuit Board Description - TMU.

2. Connect the other end of the cable to a block on the MDF. Remember to label and

number the block.

3. Connect cable RPM 603 177/10000 or the cable provided with the sound equipment

to the sound equipment. Follow the sound equipment manufacturer’s instructions.

4. Connect the other end to the MDF. Remember to label and number the block.

5. Connect the TMU block to the sound equipment block. Follow the sound equipment

manufacturer’s instructions.

2.5.7.14 I/O Terminal and Modem

The I/O terminal is connected to the NIU board via cable TSR 902 0404/10000 and the

function box (FBOXV24/5).

A modem may be installed for remote maintenance of the exchange. The modem is

connected to the NIU board via cable TSR 902 0403/10000 and the function box

FBOXV24/5.

I/O Terminal

1. Position an IBM-compatible PC near the I/O LIM.

2. Using cable TSR 902 0404/10000, connect the PC to a function box.

3. Connect the function box cable to the NIU board, as shown in the following figure.

Connect a printer to the PC, if desired.

Modem

1. Position the modem to be used for

external maintenance near the I/O

LIM.

2. Using cable TSR 902 0403/10000,

connect the modem to a function

box.

3. Connect the function box cable to

the NIU board, as shown in the above figure.

4. Plug the modem into the telephone jack.

2.5.7.15 Through-connection at Power Failure or Processor Malfunction

Modem PC

INSTALLATION


System with analogue trunk boards TLU75 and analogue telephones might be equipped

with a Failure Transfer Unit board (FTU) to get through-connection from a maximum of 16

telephones to the public network in case of power failure or processor malfunction.

Note: If the public exchange is not capable of receiving DTMF signals, analogue telephones of

type rotary dial or 10 pps (pulse generator) must be used.

The specified 1-16 analogue extensions and 1-16 analogue trunk lines must be cross-

connected in the MDF to the FTU board. Every four analogue extensions need two

function boxes (FBOXLFU/1) and one cable TSR 204 0411/16000 to the MDF. The trunks

and the extensions can be chosen from different trunk boards TLU75 and different

extension boards ELU29 but all the boards must be housed in the same magazine.

1. Connect function boxes 1 and 2 to the FTU board as shown in the

figure.

2. Connect cable TSR 204 0411/16000 to the function box.

3. Punch down the other end of the cable on an MDF block. Remember

to label and number the block (cable number 41 in the figure is an

example).

4. Repeat 1-3 for function boxes 3-8 (if applicable).

5. Connect pair 1-4 from the FTU to 1-4 chosen trunk lines from TLU75 boards.

6. Connect pair 6-9 from the FTU to the corresponding 1-4 trunk lines from the public

exchange.

7. Connect pair 11-14 from the FTU to 1-4 chosen extensions lines from ELU29

boards.

8. Connect pair 16-19 from the FTU to the corresponding 1-4 analogue telephones.

9. Repeat 5-8 for function boxes 3-8 (if applicable).

2.6 INSTALLATION TESTING

The objective of installation testing is to verify the function of the exchange in the

customer environment. Backup is stored on the HDU under directory REL1 and REL2. For

added security, a copy of the dump can be stored on a media that can be stored in a

fireproof cabinet. The HDU backup must be updated whenever data changes are made.

2.6.1 Prerequisites

à MD110, power supply and batteries installed

à Main Distribution Frame (MDF) mounted

à Public exchange test line

à Command file generated by the Data Generating System (DGS) or Command Solver (CS)

à Site specification documents

à Required I/O units

à List of individual public network subscriber numbers assigned to the public trunk lines

à Analogue and digital telephones

INSTALLATION


à PABX Operator console

à LPU display ROA 119 4275/2

à Alarm panel

2.6.2 Preparatory Checks

1. Verify that cabinets, magazines, and boards are undamaged.

2. Verify that the boards are in their correct positions in the magazines according to the

site specification document, described in Chapter 4, Installation preparation.

3. Verify that the cabling is correct in accordance with the Installation Manual and the

site specification document.

4. Verify that the earth cable is of the correct type and size and is correctly installed to

the MDF, cabinets, etc.

5. Verify that where necessary, the overvoltage/lightning protectors have been fitted on

the MDF.

6. Verify that all the I/O equipment has been connected according to the site

specification.

7. Verify that the exchange data are available and are in accordance with the customer's

requirements.

INSTALLATION


2.6.3 Power Equipment Test

1. Verify that the power equipment and connections have been installed correctly

according to the installation manual and the site specification document.

2. Check that the fuse/circuit breaker ratings are correct.

3. Switch off all the DC/DC converters, REU board, BFU2s, etc.

4. Switch on the AC supply.

5. Test the rectifier output voltage (-54.5 V) and check that the polarity is correct.

(If internal power is used, the output voltage is already checked in the factory.)

6. Switch on/connect the circuit breakers/fuses. Check that the voltage and polarity is

correct on L1, L2, L3, and L4 on the BFU2.

7. Switch on the DC/DC converters and REU board. Test the output voltage.

8. Verify that when the AC supply is switched off, the battery supply functions properly,

and that the rectifier restarts when the AC supply is restored.

2.6.4 Starting the System

1. Connect the LPU display board ROA 119 4275/2 to the upper part of the LPU board.

2. Turn on the PWM battery breaker, if installed.

3. Turn on all the RG5DC switches. The green and the yellow bulbs on each RG5DC

board will light up.

4. Turn on the HDU power switch.

5. Wait approximately 5-10 minutes for the system to load, or until 101 or 104 is visible

on the display.

6. Connect your PC to the NIU board via the function box.

7. Using the mouse, double click on the WinFIOL icon. If WinFIOL is not installed, load

WinFIOL from the SAM toolbox.

8. Select, configure and open a V.24 channel to the MD exchange.

9. Enter your username and password and press the ENTER key.

(Username and password is supplied from the Ericsson local office.)

10. Key command ALLIP to ensure that no alarm occurs. If an alarm does occur refer to

description of alarms. Search in the ALEX CD-ROM for Fault Codes (Note: Case

sensitive).

11. Perform the test according to Chapter 6.5, test before entering exchange data.

12. Key command CATII to set the system time and date.

13. Key command CASII to set the name of the site. Verify with command CADAP.

14. Transmit the command file generated by the DGS or CS with exchange data.

15. Set the external synchronization by keying command SCEXI. Verify with command

SCEXP.

INSTALLATION


16. Initiate the call information logging criteria with command CLODI.

17. Key command DUSYI to make a dump of the system.

18. Key command DUFQP to verify if the frequency for the automatic dump is correct.

In order to change, key command DUFQI.

19. Continue with the tests in Chapter 6.7, Tests after Entering Exchange Data.

2.6.4.1 LPU Display Messages in Operation

The system works properly when the LPU display shows any of the following codes:

101 103 104 106 11x

The different values show the executed restart phase.

For further information, search in the ALEX CD-ROM for Display codes (Note: Case

sensitive).

When code 99 is shown: A restart is executing after a problem occurred in the system that

causes a system restart.

2.6.4.2 Checks and Measures after Unsuccessful Load of the System

The LPU display shows the reason code for the problem. Refer to the ALEX CD-ROM for

a definition of the fault. Below is a list of the most common faults:

1. If the LEDs on the HDU do not light up, check the power units in the magazine.

2. If there is no access to the HDU, the display may show codes:

50xx 51xx 52xx 53xx 54xx

Perform the following:

â Check that the HDU is switched on.

â Check the cable between the NIU and the HDU.

â Check the terminating plug on the HDU.

â Check the cabling between the LSU and the DSU.

â Refer to the ALEX CD-ROM for more details. Search for Display codes

(Note: Case sensitive).

3. If there is access to the HDU but it is interrupted after a while:

â Check for memory error.

The LPU display may show codes:

15xx 10xx

â Check the cabling from the LSU to the DSU.

The LPU display may show codes:

60xx 61xx 62xx 63xx 64xx 65xx 67xx 68xx 88xx 89xx

â Check the LSU and the DSU.

INSTALLATION


4. If the LPU display shows codes:

71xx 89xx

â Check the cable between the LPU5 and the LSU.

2.6.5 Tests before entering exchange data

2.6.5.1 Fault Identification

The commands for external alarms which are entered prior to system delivery are described

in Appendix 2. These alarms are used to supervise the power, when internal power is used.

The purpose of performing fault identification testing is to ensure that:

à The diagnostic program of the system is functioning correctly

à The correct alarms are displayed on the alarm panel and the operator console

à The fault status information is being entered into the alarm log

1. Key command ALREI to acknowledge all alarms.

2. Verify that the alarm log is empty.

3. Operate the serviceman input (if used). The Serviceman Present symbol is displayed

on the operator console.

4. Unplug a device board in the LIM, e.g., ELU29. Within two minutes, a Class 2 alarm

is received. The number 2 lamp on the alarm panel lights up.

5. The Class 2 alarm lamp remains lit.

6. Key command ALLOP from the I/O terminal. A Class 2 alarm and Fault Code 15 is

displayed in the alarm log. The faulty LIM and equipment indication should

correspond with the EQU position from which the device board was removed.

7. Re-insert the device board. Within two minutes, the Class 2 lamp extinguishes and

the Class 0 lamp lights up. The Class 2 alarm on the operator console disappears.

8. Key command ALLOP. A Class 0 alarm is displayed in the alarm log. The RDATE

and RTIME are also shown.

9. Key command ALREI. The Class 0 lamp is extinguished.

10. Key command ALLOP. The alarm log is empty.

11. Switch off the AC supply to the rectifier. Within one minute an alarm appears on the

operator console and the alarm panel.

12. Key command ALLOP. In Alarm Class 4, the alarm with Fault Code 810 has

occurred. Use command ALEXP to print the external alarms.

Note: Fault code number is market-dependent.

13. Switch on the rectifier’s AC supply. The Class 4 lamp extinguishes and the event

lamp lights up (Alarm Class 0).

14. Key command ALREI. The event lamp extinguishes. The alarm log is empty.

15. Repeat steps 12 - 15. This time, switch off a circuit breaker.

INSTALLATION


16. Sign off the test.

If faults are discovered during testing:

à Verify that the lamps in the alarm panel are well fitted

à Verify the programming

à Verify the cabling

à Verify strapping of the ALU board (see the ALEX CD-ROM)

2.6.5.2 System Hardware Function Test

Perform the following tests on the system hardware, with the aid of the MD110 Reference

Guide and the ALEX CD-ROM.

Initiate a Full Function Test in the LIM

1. Key command LSFTI:LIM=1,FULL=YES;

2. Check the printout.

Multi-Party Unit Test

1. Key command FTMDI to test each TMU board.


Tone Test

1. Key command FTTDI to test each TMU board.


2.6.5.3 System Handling Tests

This test verifies:

à System software recovery functionality

Prerequisites:

à Valid reload media. Verify with command DUBDP.

à Stable system free from alarms

à Time and date set

1. From the I/O terminal, key command RFEXI. No dial tone is heard on the extension

and all traffic is ceased. 99 - 102 - 99 - 101 - 99 - 104 is displayed on the LPU. Within

one minute, the dial tone is restored and traffic can commence. The I/O terminal logs

off and the result of the pass/fail LIM test is printed. Operator console is switched into

night service.

2. Log on to the I/O terminal and key command ALLOP. The alarm log should be

empty. If alarms appear, or if the system fails to restart, refer to the Fault Locating

section in the ALEX CD-ROM, search for Fault Codes (Note: Case sensitive).


INSTALLATION


2.6.5.4 Powering Down and Reload

1. Switch off the main power supply to the rectifier.

2. Switch off the BFU or circuit breakers.

3. Remove the battery fuse, if applicable.

4. Switch on the AC main power supply to the rectifier.

5. Replace the battery fuse, if applicable.

6. Switch on the BFUs/circuit breakers.

7. The hard disk drive will load the system. An alarm will occur during reload. When

the LIM has been loaded, verify that the alarm log contains Fault Code 45. No other

alarms should exist. Clear the alarm log. Check for normal telephone and system

operation.


2.6.6 Dumping

The first dump to HDU is done after the system has been started and the command file

generated by DGS has been entered. Subsequent dumps to HDU are performed when

exchange data are changed.

Dump to HDU

1. From the I/O terminal, key command DUSYI. Wait for confirmation of dump.

2. Key command DUBDP. Check that RELl and REL2 are valid.


2.6.7 Tests after entering exchange data

2.6.7.1 Extension and Operator Console Test

This test verifies:

à Cabling between MDF and ELUs

à Correct directory number displayed on telephones

à Voice transmission

Analogue Extension Test

1. Connect an analogue telephone to the first analogue port on the MDF and check if it

works.





à Replace the telephone set

INSTALLATION


à Replace the ELU29 board

Digital Extension Test

1. Connect a digital telephone to the first digital port on the MDF and check if it works.





à Replace the telephone set

à Replace the ELU28 board

Operator Console Test

The test applies to a console of type OPI-II. If a console of type DBC 214 01 or OWS is

used, perform the test appropriate for that instrument.

1. Plug in the handset/headset on the operator console. If a symbolic console is used,

verify that all symbols are displayed on the console.

2. Press the present/absent button on the push-button panel. Verify that display symbols

are extinguished. Confirm via the display that the console is in day service mode.

3. Initiate a call to the console from an extension. Verify the incoming call tone and the

display of one call in queue. The internal call symbol and the calling extension

number are displayed.

4. Press the answer/extend button to receive the call and verify the speech connection.

5. Press the left field disconnect button to disconnect the extension.

6. Dial an extension number from the console. Verify that the dialled digits appear in the

connection field, then check the left call status field.

7. Press the left field button to extend the call. Verify the speech connection.

8. Dial another extension number and verify the display of dialled digits in the right call

status field.

9. Press the right field button. Verify the speech connection.

10. Press the conference button. Verify the speech connection with two parties.

11. Press the left field disconnection button. Verify the disconnection of the party

connected.

12. Press the right field disconnect button. Verify the disconnection of the party

connected.

13. Press the present/absent button. Verify the activation of night service.





INSTALLATION


à Check the ELU28 board

à Check the operator console

2.6.7.2 External Line Test

All external line positions, associated functions, and traffic cases are to be tested. This test

verifies:

à Cabling from TLU boards

à Route data

à Voice transmission

à Public exchange access

à Access to other exchanges in a private network

Prerequisites:

à All cabling complete

à The data is entered in the system

à All external lines to be tested must be present and free. Key command BLFDP to printout

blocking status

à For printouts of all equipment and route data, key commands ROEDP, RODDP, and

ROCAP.

à Key commands NADAP, TCMAP, and SCEXP for printouts of these data

ISDN connections to the public exchange:

à Alarms 272 or 312 indicate that synchronization is not received. Verify with command

ALLOP. If there is an alarm, make a loop test receiver → transmitter. If the alarm disappears,

the cabling is correct to the point where the loop was made.

à Alarms 303 or 309 indicate that layer 2 is missing. Investigate with the public network

provider, why the connection between the MD110 and the public exchange is not working.

à Make an external call to verify that the line works properly.


à Verify the cabling between the TLU board and the public network


à Check the TLU board

Outgoing Trunk Test

1. Dial *0*, the external trunk number, and the route access code.

2. Verify the dial tone, if necessary.

3. Dial the public network subscriber number.

4. Verify the ring tone and speech connection from the public network subscriber.


Incoming Trunk Test

1. Initiate an incoming Direct In Dialling (DID) call via the trunk to be tested.

2. Answer the call and verify the speech connection.

INSTALLATION



Tie Line Test (QSIG)

1. Connect to an interworking exchange and verify the alarms as described for ISDN

connections to the public exchange above.

2. Initiate an incoming call from the interworking exchange to any telephone set.


4. Replace the handset.

5. Dial *0*, the trunk number, and the route access code. Verify the dial tone, if

applicable.

6. Dial an extension in the interworking exchange, and verify the ring tone.


8. Replace the handset.


2.6.8 Feature Function Test

Using extensions of the correct category, place calls to verify optional or special functions

purchased by the specific customer.

For more detailed information on how to test the particular optional feature, see the ALEX

CD-ROM.

2.6.8.1 Music On Hold

MOH testing requires two telephones.

1. Start the sound equipment.

2. Make an external incoming call to a telephone in the system.

3. From this telephone place the call on-hold.

4. Verify that the external party hears the music.

5. If the acoustic volume is too high or too low, restrap the TMU board as indicated in

Appendix 1.

2.6.9 Post-Installation Measures

1. Arrange for cross-connection of extension lines and external lines in the MDF. Any

external lines not yet connected from the public network are to be blocked.

2. Key command BLFDP to verify that no devices are blocked and that all issued

alarms have been cleared.

3. Verify with command CNLIP that all device boards are active.

4. Store the DGS or CS command file, in a suitable place.

5. Start the call information logging function by entering command CLTGI.

INSTALLATION


6. Verify that the call information logging data is recorded in the PC.

Note: 10 calls must be made before anything is recorded!

2.6.9.1 Safety Backup

When the exchange is taken into operation, a safety backup precaution must be made. This

to prevent serious problems in case of a fault in the ordinary HDU.

A new safety backup precaution must be regularly made, e.g. 3-4 times a year in

connection with service visits.

In the procedure below, a portable Syquest disk drive is used, but other devices with a

SCSI interface can be used depending upon what is available in your market.

1. Use a portable Syquest disk drive, or a compatible device and cable

TSR 902 0439/5000.

2. Set the strap on the SCSI bus on the Syquest to 0.

3. Install the disk in the Syquest driver and turn the power switch on.

4. Remove the terminator plug RNV 903 001/1 in the lower part of the

HDU board.

5. Connect the Syquest to the lower part of the HDU board.

Note: Do not disconnect the cable between the NIU and the HDU.

6. If the Syquest disk is unformatted, it must be formatted. To format:

- Key command

FICRI:SUBFS=SAFETY-SF,SIZE=64; - Verify with command IODDP.

7. Check that a new dump exists:

- Key command DUBDP.

If no dump exists, make a new one:

- Key command DUSYI.

8. Initiate the Safety backup:

- Key command FISBI:DIR=RELx; (RELx: Chose the newest version of REL1 or REL2)

9. Remove the Syquest disk drive. No command has to be entered.

10. Reinstall the terminator plug RNV 903 001/1 in the lower part of the HDU board.

Check that there are no remaining alarms:

- Key command ALLOP.

Note: If the start-up sequence of the Syquest disk drive is not finished when the disk is connected,

the bus is blocked. Verify with command IODDP.

2.6.10 Covers

The covers provided with the system simply snap into place. The exception is the right

bottom plate and the bottom ventilator grill which both must be fastened with screws.

Cable TSR 902 0439/5000 to Syquest disk drive

INSTALLATION


If the external cables enter from the top of the stack, a cable inlet hole must be made on the

rear part of the top cover. Then the top cover must be anchored to the top module with a

bracket. The mounting set is NTM 144 151.

1. Take the ventilation grating off the rear part of the top cover.

2. Cut off the right portion of the grating. To be cut at the red crosses:

3. Fasten the PVC protection strips with cable ties to reinforce the grating:

4. Replace the ventilation grating on the top cover.

5. Mount the bracket with two screws and nuts.

6. Replace the top cover and lock the ventilation grating to the bracket with the

remaining screw.

2.6.11 Fault Reporting

Faults that cannot be remedied by board replacement, etc., are to be reported to your local

Ericsson office using the normal fault-reporting routine.