Sulim Test

4TEL4TEL System 7000 EWSD

(SULIM) Interface Guide

D03-699-43

© Copyright 1998 Teradyne, Inc. Allrights reserved. No part of this work(including attachments andinclusions) may be reproduced ortransmitted in any form or by anymeans, electronic or mechanical, orby any information storage or retrievalsystem without permission in writingfrom the publisher.

4SIGHT, 4TEL, CCU, CMU, DBIU, DRMU,GRIDSCAN, MBS, RCU, RMU, SAC,SCOT, TESTNET, VRS, and XLT areregistered trademarks of Teradyne, Inc.

Teradyne, Inc.Telecommunications Division1405 Lake Cook RoadDeerfield, IL 60015USA

For assistance, contact your localTeradyne Customer Servicerepresentative.

Table of Contents

D03-699-43 • 4TEL System 7000 EWSD (SULIM) Interface Guide • Issue 3 i

Table of Contents

D03-699-43March 1998

Issue 3

Title Page

Table of Contents .............................................................................................................. ........................... i

Chapter 1: Document Overview .................................................................................................. ..............11.1 Introduction................................................................................................................................1

Purpose ...............................................................................................................................1Intended Audience...............................................................................................................1

1.2 Document Contents...................................................................................................................11.3 Related Documents ...................................................................................................................21.4 Document Change History ........................................................................................................21.5 Interfaces and Test Access .......................................................................................................31.6 Interfacing Procedure ................................................................................................................4

Chapter 2: Prerequisites ...................................................................................................... ......................52.1 Introduction................................................................................................................................52.2 4TEL Equipment ........................................................................................................................5

Hardware .............................................................................................................................5TSC 720 Software Configuration.........................................................................................5

2.3 Switch Equipment ......................................................................................................................62.4 Tools required............................................................................................................................62.5 Test data required .....................................................................................................................6

Lines for Test Port Check ....................................................................................................6

Chapter 3: Switch Access Port Check........................................................................................... ...........93.1 Introduction................................................................................................................................93.2 Switch Access Port Check Procedure.......................................................................................9

Chapter 4: RMU 745 Configuration and Turn Up.................................................................................. .114.1 Introduction..............................................................................................................................114.2 Personality Module Configuration............................................................................................114.3 Power Up Check......................................................................................................................144.4 RMU Sample Line Check ........................................................................................................14

Chapter 5: Test Port Checks ................................................................................................... ................155.1 Introduction..............................................................................................................................155.2 Test Port Check Procedure .....................................................................................................15

Appendix A: RMU 745 Test Bus Terminations ..................................................................................... .17

Appendix B: Interface Check Sheet............................................................................................. ...........21

Appendix C: Interface Confirmation after MAX 2000B Retrofit............................................................23

Appendix D: SULIM Command Summary ............................................................................................. .25

Table of Contents

D03-699-43 • 4TEL System 7000 EWSD (SULIM) Interface Guide • Issue 3ii

Glossary ....................................................................................................................... ..............................27

Index .......................................................................................................................... .................................31

Figure PageFigure 1-1: RMU 745 in an EWSD Switch - block diagram .............................................................3Figure 2-1: Test Port check sheet ...................................................................................................7Figure 2-2: EWSD Switch Cluster example....................................................................................8Figure 4-1: Printed Circuit Board Removal ....................................................................................12Figure 4-2: Control Board Configuration........................................................................................13Figure A-1: RMU 745 Rear Panel..................................................................................................17Figure A-2: P12 Connector Pinout.................................................................................................17Figure A-3: Matrix Connector Detail ..............................................................................................18Figure B-1: Test Port Check Sheet................................................................................................22

Table PageTable 1-1: Document Development History.....................................................................................2Table 4-1: Personality Module (390-017-00) Jumpers ..................................................................12Table A-1: Test Matrix Test Port Locations (X1 connector)...........................................................18Table A-2: V.24 Matrix Control Port Characteristics......................................................................19

Chapter 1: Document Overview

D03-699-43 • 4TEL System 7000 EWSD (SULIM) Interface Guide • Issue 3 1


1.1 Introduction

This chapter provides an overview of the System 7000 EWSD/SULIMinterface, as well as a very brief overview of the interface configurationand test procedures in this document.

This chapter contains the following sections:

Section Title1.2 Document Contents1.3 Related Documents1.4 Document Change History1.5 Interfaces and Test Access1.6 Interfacing Procedures

Purpose

This document describes how to configure and test a System 7000SULIM interface in an EWSD switch.

Intended Audience

The intended audiences for this guide are those people responsible forengineering, installation and configuring the System 7000 SULIMinterface in an EWSD switch.

1.2 Document Contents

The chapters in this guide contain the following information:

• Chapter 2, “Prerequisites”, defines the procedures and conditionswhich are required to be fulfilled prior to carrying out the instructionsin this document, and indicates test data which should be ascertainedprior to testing the interfaces.

• Chapter 3, “Switch Access Port Check”, provides a short procedureto verify the proper operation of the Switch Access Port via theSULIM Access Manager unit.

• Chapter 4, “RMU 745 Configuration and Turn Up”, gives the RMU745 configuration setting for operation in an EWSD switch.

• Chapter 5, “Test Port Checks”, describes the checks to be carried outon switch Test Ports in the EWSD host or remote sites which havebeen allocated for connections to an RMU 745 (via a matrix outlet).

• Appendix A, “RMU 745 Test Bus Terminations”, provides wiringdiagrams of the RMU 745 digital Test Bus connections.


D03-699-43 • 4TEL System 7000 EWSD (SULIM) Interface Guide • Issue 32

• Appendix B, “Interface Check Sheet”, provides illustrations of forms tobe used during the Interface checkout.

• Appendix C, “Interface Confirmation after MAX 2000B Retrofit”,provides instructions for re-establishing the proper interface after aMAX 2000B Matrix has been retrofitted to a RMU 745.

• Appendix D, “SULIM Command Summary”, provides SULIMcommands and acks sent using DTMF signalling.

• The last appendix is a glossary of terms used in this document.

1.3 Related Documents

Refer to the following documents for more information on the RMU 745and the TSC 720:

• 4TEL RMU 745 Installation Guide

• 4TEL RMU 745 Maintenance Guide

• 4TEL TSC 720 SULIM Access Manager Guide

• 4TEL TSC 720 System Configuration Guide

• 4TEL TSC 720 Installation Guide

• 4TEL Installation and Commissioning Guide

1.4 Document Change History

Table 1-1 lists the development history of this document:

Table 1-1: Document History

Issue Level Date

Issue 1 May 1996

Issue 2 August 1997

Issue 3 March 1998



1.5 Interfaces and Test Access

This 4TEL application is used to test lines that reside in an EWSD switchwith SULIM line testing capabilities, via appropriately configured DigitalLine Units (DLUs) on LTG-B. Figure 1 is an overview of the connectionof 4TEL to the EWSD switch.

Figure 1-1: System 7000 Interface for an EWSD (SULIM) Switch - block diagram

The TSC 720 controls line access and connection, while the SULIMAccess Manager (SAM) implements the tone (DTMF) interface to theEWSD SULIM.

This tone interface allows 4TEL to:

• Learn line access data from the switch

• Request test access to a line

• Control test bus connection, and

• Release test access.

The EWSD SULIM control/access ports are hereafter referred to asSwitch Access Ports.

4T05696 08/01/97

Matrix for

Test BusRMU 745

LTG-BDLU 1

4TEL System Controller

4TEL Terminal

EWSD4TEL

Switch Access (control) Ports

Test PortsTB2

Matrix Control

LTG-BDLU 2

LTG-BDLU n

(up to 16)

(ethernet (thinwire))

SAM (up to 16) PSTN

Switch Network

SULIM

Comms Line



Once access data is learned, the TSC determines which RMU can gainmetallic access to the line to be tested.

Each RMU 745 installed for EWSD line testing requires a 4x16 test busmatrix (MAX 2000B). The matrix allows up to sixteen distinct 4-wireconnections to be mapped to the RMU backplanes single 4-wire output,Test Bus 2. Each of the matrices sixteen 4-wire connections run to anindividual DLU located in the EWSD switch. Hereafter, the sixteen 4-wirematrix connections are referred to as Test Ports.

Note: Line access and connection at EWSD remotes is accomplished inthe same manner as at an EWSD host switch.

1.6 Interfacing Procedure

Configure and test the 4TEL/switch interfaces as follows:

1. Check that the prerequisites in Chapter 2 have been met.

2. Check that Switch Access Ports are operating properly asdescribed in Chapter 3.

3. Set up each RMU 745 in the switch as described in Chapter 4.

4. Check each switch Test Port connected to the above RMU 745s asdescribed in Chapter 5.

Chapter 2: Prerequisites



2.1 Introduction

This chapter briefly describes the requirements which must be met beforeattempting to set up and test the 4TEL/switch interfaces.


Section Title2.2 4TEL Equipment2.3 Switch Equipment2.4 Tools Required2.5 Test Data Required

2.2 4TEL Equipment

Hardware

The following 4TEL equipment must be installed before checking theSystem 7000 EWSD/SULIM interface: TSC 720, RMU 745, and the SAM.

TSC 720 Software Configuration

The following configuration tasks, as described in the TSC 720 SystemConfiguration manual, must be completed before checking the4TEL/EWSD (SULIM) interface:

• One TSC Port must be configured for each Switch Access Port usedby the SAM unit:

− Connection Type must be Dialup DTMF

− Each Port Number must be unique

• Each Switch Access Port used by the SAM unit must be configured:

− Connection Type must be Dialup DTMF

− Port Timeout must be 3 minutes

• Each RMU 745 must be configured with the proper MU Matrix Portnumber and Test Port (DLU) number.

Note: The Switch Test Matrix number is not used in this application.



2.3 Switch Equipment

This Interface Guide will enable 4TEL to be interfaced to Switch Accessand Test Ports in an EWSD switch running version 6.2 or a compatiblesoftware release, with SULIM access capability and properly configured,built-in DLUs on LTG-B. Compatibility with future builds and softwarereleases can be checked by consulting Teradyne.

2.4 Tools Required

To complete the interface configuration and test procedures, the followingtools are required:

• A voltmeter for detecting switch battery voltage at the switch TestPorts.

• A handset (micro telephone) is used to busy out telephone lines.

• A PC or VDT, capable of communicating with the TSC 720.

2.5 Test Data Required

A number of "Test Lines" and associated switch data have to be known tocheck the Switch Learn and Test Access functions.

1. Fill in the preliminary information on the Test Port check sheet. Anexample is shown in Figure 2.

Note: The complete check sheet is included in Appendix B.

2. Identify and record a Test Line for each Test Port for Test Accessfunction checks as described in the section Lines for Test PortCheck.

Lines for Test Port Check

Identify a Test Line for each Test Port connected to an RMU 745 matrixport and note it on the Test Port check sheet. The following procedureuses an example, illustrated in Figure 2 and Figure 3, for clarification.

Note: “Test Port” on the checksheet is the ID code of the DLU connectedto the associated MU matrix port. The term “Test Port” does not refer tothe number of the test “bus.”

The Test Line may be any telephone line which:

• is accessible via the Test Port in question



• is free from service affecting faults - the moderate fault condition on aSample Line is acceptable

• can be busied out conveniently.

On the Test Port check sheet list the following, for each Test Port:

1. In the first column (MU Matrix Port), list each port of the MAX2000B matrix which is connected to a DLU.

2. In the second column (Test Port (DLU)), enter the ID Code(number) of the DLU to which the matrix port is connected.

Note: 4TEL software must use the switch DLU ID codes to identify TestPorts. The switch will respond to a Test Access request by providing atest connection between the DLU and the line specified in the request ifthis is possible. If 4TEL is not using the correct Test Port number, the testresult will usually be an open-circuit condition.

Figure 2-1: Test Port check sheet

3. Enter the number of the chosen Test Line in the third column.

Note: Each MU matrix (MAX 2000B) port must be connected to a uniqueDLU.

4T05698 08/01/97

MU Matrix Port

Dem

and

test

id

le li

ne

Dem

and

test

bu

sy li

ne

MU NAME: SATMU1

TEST PORT CHECK SHEET

DATE

TEST PERFORMED BY:

NAME

SIGNATURE

DISTRICT EXCHANGE

Test LineTest Port

(DLU)

0010 7777777

0020 4789999

0030 7888888

SATURN ALPHA

JOHN F. SMITH

10/12/99

1

2

3

4

John F Smith



Figure 2-2: EWSD Switch Cluster Example

Note: There is only one Test Port connection per DLU.

4T0570003/02/98

MU2/1

MU2/2

7777777

4789999

7888888

MU1/1

MU1/2

MU1/3

MU1/4

Test Lines

MU3/1

MU3/2

SAM

RMU 745# 2

RMU 745# 1

RMU 745# 3

inout

inout

Matrix

inout

inout

Matrixin

out

Matrix

inout

inout

inout

SystemController

TLC, TLD

EWSDREMOTE

DLU

DLU

EWSD Host

DLU

DLU

DLU

DLU

EWSDREMOTE

DLU

DLU

SULIMPort

TLA, TLB

TLC, TLD

TLA, TLB

TLC, TLD

TLA, TLB

TLC, TLD

TLA, TLB

TLC, TLD

TLA, TLB

TLC, TLD

TLA, TLB

TLC, TLD

TLA, TLB

TLC, TLD

TLA, TLB

Chapter 3: Switch Access Port Check



3.1 Introduction

This chapter provides a short procedure to verify the proper operation ofthe 4TEL System’s switch access function.

3.2 Switch Access Port Check Procedure

The Switch Access Ports assigned to 4TEL, and the communicationslinks between 4TEL, the SAM unit, and these ports should be checked toensure that they are configured and connected for operation with 4TEL.This procedure can be performed where the TSC 720 terminal is located.

1. From a TSC terminal, attempt to test a phone line that exists in theEWSD switch.

2. Monitor the dial-out lines on the SAM to determine if the SAM dialsthe SULIM port in the EWSD.

• If the SULIM port answers, proper signaling between the SAMand SULIM is indicated by DTMF tones.

• If the SULIM port does not answer, determine whether DTMFtones are reaching the SULIM unit. If they are, there may be aswitch-related problem. If they are not, refer to the 4TEL TSC720 SULIM Access Manager Guide for troubleshootinginformation.



Chapter 4: RMU 745 Configuration and Turn Up



4.1 Introduction

This chapter describes how to configure the RMU 745 in an EWSDswitch, and how to verify proper RMU 745 operation.


Section Title4.2 Personality Module Configuration4.3 Power Up Check4.4 RMU Sample Line Check

The following procedure should be carried out on each RMU 745 installedin the EWSD host and remote sites to ensure that the RMU is set up forthe correct switch interface.

4.2 Personality Module Configuration

Follow the procedure below to gain access to the Personality Module(PM) and Control Board, and set switches and jumpers to the correctsettings.

CAUTION: When removing or working on RMU 745 printed-circuit boards, observe the normal precautions for handlingdevices which are sensitive to static discharge.

1. Ensure that the RMU 745 is powered off.

2. Remove the RMU 745 front panel. See Figure 4(b).

3. Remove the RMU 745 Control board with PM. See Figure 4(c).

4. Identify the PM and SW1 on the Control p.c.b. - See Figure 5(a).

5. Set the Personality board jumpers correctly. See Figure 5(b) andTable 2.

6. On SW1, set switch keys 1-8 to 00000100. See Figure 5(c).

7. Re-install the Control board and the front panel.



381-329 Control Board

381-172 DCMUP.C.B. Ejector

Handles

381-019 Option Board

(a) Power down unit

(b) Release front panel retaining screws and remove panel

Personality Module (PM)

4T05699 08/01/97

(c) Remove Boards

Retaining Screws

Figure 4-1: Printed Circuit Board Removal

Table 4-1: Personality Module (390-017-00) Jumpers

Link Setting

LK1 )LK2 )LK5 )

Not used in this applicationNot used in this applicationNot used in this application

LK3 )LK4 )

A-BA-B

LK6 )LK7 )

OutOut



4T05701 08/01/97

3

1

32

1

32

A B C

1

8

390-017-00

1 8

SW1 Key Open SW1 Key Closed

SW1

J2 J1LK

7

LK5

LK6

AB

C

LK4

LK2

LK3

LK1

D1

D2

J3

K1

SW1

Front

Rear

PM

K2

K3

K4

R2

R1

Control Board

A

B

C

Figure 4-2: Control Board Configuration



4.3 Power Up Check

Use the following procedure to verify proper power up of each RMU 745:

1. Isolate the RMU 745 from the switch battery supply momentarily.

2. Check that the indicator lights correspond to an error-free bootup:

• The Control Board (CB) ALARM indicator (LED) should flashduring the bootup sequence and should be unlit at the end ofthe bootup sequence

• The Measure indicator light (LED3) on the DCMU board shouldflash during self-calibration (part of the bootup sequence) andshould be unlit at the end of the bootup sequence

• The Alarm (OB) light should flash during the bootup sequenceand should be unlit at the end of the bootup sequence.

If the RMU 745 does not power up correctly, refer to the RMU 745Faultfinding document for troubleshooting instructions.

4.4 RMU Sample Line Check

The RMU 745 must be able to dial back to the repair or service bureauvia its Sample Line. Check that the Sample Line has been properlyprovisioned by using a handset to call back on the Sample Line (refer tothe Figure A-2 in Appendix A).

Chapter 5: Test Port Checks



5.1 Introduction

This chapter describes how to test each of the host and remote site TestPorts connected to an RMU 745 matrix port, i.e., verifying access to theEWSD via each connected DLU.

Note: It may be necessary for two people (who are in communication viaa telephone line) to carry out the following procedure. One person caninput the commands to the TSC while the second uses the voltmeter tomonitor the appropriate Test Pair at a remote site. This may also benecessary at the Host, unless the Switch Access Ports and RMU 745 arein close proximity.

5.2 Test Port Check Procedure

Check each Test Port according to the following procedure:

Note: 4TEL software must use the switch DLU ID codes to identify TestPorts. The switch will respond to a Test Access request by providing atest connection between the DLU and the line specified in the request ifthis is possible. If 4TEL is not using the correct Test Port number, the testresult will usually be an open-circuit condition.

1. Access 4TEL in an appropriate manner.

2. From the Test Port check sheet, identify the first port to be tested.

3. Check that the Test Line given against the Test Port to be tested isidle.

4. Using 4TEL, perform a Demand Test on the idle line, and check forthe correct response. 4TEL should detect Office Battery, anyCable present, etc. Refer to the Acceptance Procedure in the4TEL Installation and Commissioning Guide for typical DemandTest results.

5. Busy out the line, then perform a second Demand Test on the line.4TEL should detect the busy line. Again, refer to the AcceptanceProcedure in the 4TEL Installation and Commissioning Guidefor typical Demand Test results.

6. The Test Port check procedure is concluded when all of the TestPorts connected to the test matrix have been checked in the abovemanner.



Appendix A: RMU 745 Test Bus Terminations



The four-wire Test Bus connection to the test matrix is terminated on P12on the RMU 745 rear panel - see Figure 6.

Figure A-1: RMU 745 Rear Panel

P12 is a wire-wrap pin field at which terminations and interface testmeasurements may be made. The Digital Test Bus pins are A/B 13 andA/B 14 as shown in Figure 7.

4T20043

P12

Sample line pair

Exch battEarth

Test bus 2 (digital 4-wire) Test in pair Test out pair

A

B28

A

B B

A

B

A1 20 25155 10

1 20 255 10

Figure A-2: P12 Connector Pinout

4T05734 08/01/97

P11

Port # 1 DCEPort # 3

DTEPort # 2

DTE

J23 J22 J21

P13

J12

P12

DC voltages present on J21, P11, P12, P13, and J12

C32 C1X2 X1

A32



The MU (test) matrix detail is shown in Figure 8 and Table 3.

4T0573308/12/97

C

A

32 1

32 1

Figure A-3: Matrix Connector Detail

Table A-1: Test Matrix Test Port Locations (X1 connector)

MUMatrix Port

Switch side (in)Pinout [a leg, b leg]

Subscriber side (out)Pinout [a leg, b leg]

1 C1, A1 C2, A2

2 C3, A3 C4, A4

3 C5, A5 C6, A6

4 C7, A7 C8, A8

5 C9, A9 C10, A10

6 C11, A11 C12, A12

7 C13, A13 C14, A14

8 C15, A15 C16, A16

9 C17, A17 C18, A18

10 C19, A19 C20, A20

11 C21, A21 C22, A22

12 C23, A23 C24, A24

13 C25, A25 C26, A26

14 C27, A27 C28, A28

15 C29, A29 C30, A30

16 C31, A31 C32, A32



Communication between the RMU 745 and the matrix is accomplishedover a V.24 matrix control port, whose characteristics are shown in Table4.

Table A-2: V.24 Matrix Control Port Characteristics

BAUD RATE: 1200 baud CHARACTER SIZE: 8 bits

PARITY: None STOP BIT 1 stop bit

INTERFACE: CCITT V.24 FLOW CONTROL: None



Appendix B: Interface Check Sheet



It is advised that lines suitable for testing the switch Learn and TestAccess functions together with associated data are identified prior tocarrying out the test procedures in this publication.

The following pages contain examples of suitable check sheets on whichto record such data.



Figure B-1: Test Port Check Sheet

The Test Port check sheet in Figure 9 is used for the switch Test Ports connected to the RMU 745digital Test Bus via the matrix. Fill in a line for each Test Port connection, assigning a test linewhich may be used to check test access via the port.

4T05702 08/01/97

MU NAME:

TEST PORT CHECK SHEET

DATE

TEST PERFORMED BY:

NAME

SIGNATURE

DISTRICT EXCHANGE

MU Matrix Port D

eman

d te

st

idle

line

Sheet of

Test LineTest Port

(DLU) Dem

and

test

bu

sy li

ne

Appendix C: Interface Confirmation after MAX 2000B Retrofit


Appendix C: Interface Confirmation afterMAX 2000B Retrofit

Certain RMU 745 equipment has been installed without being equipped with aMAX 2000B Matrix. In order to expand system capabilities, a MAX 2000B matrixcan be retrofitted to the RMU 745 unit.

After a MAX 2000B Matrix has been retrofitted to an RMU 745, it is necessaryto re-establish and test the interface to accommodate the new capabilities.Follow the instructions in Chapters 2 through 5. Pre-existing connections shouldbe spot checked to see that they have not been disturbed.

Appendix C: Interface Confirmation after MAX 2000B Retrofit


Appendix D: SULIM Command Summary



SULIM commands and acks are sent using DTMF signalling.

Ack from SULIM to TSC F

Ack from TSC to SULIM F

Connect TU TB inward FA6

Connect TU TB outward FA7

Dial digit X sent to SULIM F4X

DLU ID request to SULIM F82

DLU ID sent to TSC D50XXXX (X: 0…9)

Line Status sent to TSC C: subscriber idleD: subscriber busyE: congestion

Release access line to SULIM F79

Release line from test FA9

SULIM answer code 789



Glossary


Glossary

B

Baud rate Signal modulation rate. The baud rate is equivalent to digital bits persecond if each signal represents one bit.

Bit BInary digiT (BIT): An element in binary notation which can take the twovalues "0" (ON) or "1" (OFF).

C

CU 4TEL switch-based Control Unit which communicates with the switchprocessor via switch Control Ports to set up test access andcommunicates with a 4TEL MU to make measurements on the accessedline.

Control interface The Control Interface or Control Port is the communications port via whichan LTS will carry out Learn and Test Access transactions with the switchprocessor. A Test Access request will specify the required line using theline DN or EN and the Measurement Interface via which the line will beaccessed.

Control port See Control Interface above.

D

DLU Digital Line Unit: a frame in the EWSD which contains the subscriber linecircuits.

DN Directory Number: The "telephone number" which telephone users use toaccess a particular line (or group of lines) on the PSTN. Where the line isin a hunt group the number will access the first idle line in the group. TestAccess to a specific line in the group can only be obtained by using the EN(see below).

E

EN Equipment Number: Identifies a unit of switch equipment on which a singletelephone line may be terminated. The EN enables individual lines in ahunt group to be accessed.

ETS External Test Equipment

EWSD Siemens Digital Electronic Switch System (switch).

F

Field Part of a group of data characters with particular significance.

Glossary


G

GP Group Processor

L

LMCP Subscriber Line Measuring Circuit

LTG Line/Trunk Group

LTGA Line Trunk Group A

LTGB Line Trunk Group B

LTGC Line Trunk Group C

LTS Line Test System: A system (such as 4TEL) which is interfaced to switchTest Access and Control Ports to access and test telephone lines

Learn Function that enables a 4TEL CU to access line data from the switch andbuild or modify the CU routine testing database.

M

MAX 2000 Matrix to connect EWSD test ports to RMU745 Test Bus.

Measurement Interface (MI) The Measurement Interface or Test Port is a switch interface at which theswitch will provide test connection to the line to be tested via a Test Matrix.The LTS will have test bus connections to a number of MeasurementInterfaces to facilitate Test Access to all lines to be tested by the LTS.

The term "MI" is used in certain switch technologies (e.g. System 1240) forthe software parameter which identifies a particular MeasurementInterface.

Modem MOdulator/DEModulator: Device which converts digital information intoanalogue, voice-frequency form for transmission over a normal telephoneline and converts received transmissions back to digital information.

MU Measurement Unit. 4TEL test head installed in switch which accesses andmeasures the characteristics of local telephone lines under the control ofthe 4TEL System Controller.

P

PSTN Public Switched Telephone Network: Telephone network provided forpublic use by a PTO or private company.

PTO Public Telephone Organization: PSTN provider, sometimes known as PTT.

Protocol Set of rules governing the format and exchange of data between two

Glossary


devices such that reliable communications is maintained.

R

RMU Remote Measurement Unit

S

SAM SULIM Access Module

SLCA Subscriber Line Circuit Analog

SLMA Subscriber Line Module Analog

SN Switch Network

SULIM Subscriber Line Measuring System

Switch Communications switch or automatic telephone switch providing switchedconnections between telephone lines (e.g. trunk lines) terminated on theswitch.

System Controller 4TEL central control computer that provides central control of the switch-based CUs and MUs and processes the measurement data received fromthese devices.

Glossary


T

TAL Test Access Location: a 4TEL software identifier which represents one ora group of commoned switch test access mechanisms to which 4TEL isconnected. The TAL links;

• groups of switch lines

• switch test access mechanisms (one or more) which provide access tothem; and

• 4TEL MU Test Buses which are connected to that mechanism andthus have access to all of the lines in the group.

A TAL is unique to the groups of lines which it covers and thus representsexclusive access. In other words, no line "owned" by a TAL may be ownedby another TAL. However, a 4TEL MU may be connected with more thanone TAL and, conversely, a TAL may be connected with more than oneMU.

TB Test Bus

TE Test Equipment

Test matrix Test Access equipment to which a number of line modules are connected.The line modules are the switch equipment providing termination forsubscriber's lines. The test matrix can provide a test access connectionbetween any Test Port connected to the matrix and any line terminationconnected to the matrix.

Test Port See Measurement Interface.

TLA, TLB EWSD DLU Test Bus leads looking toward the subscriber.

TLC, TLD EWSD DLU Test Bus leads looking toward the C.O.

TU Test Unit

Index


Index

C

Control Boardconfiguration, 13

D

Digital Line Unit, 3, 27DLU, 3, 4, 6, 27

Test Port configuration, 5DLU ID code, 7, 15

M

matrix, 15, 22, 28, 30connections, 18control port, 19

Matrix, 4, 6MU port configuration, 5

P

Personality Module, 11

R

RMU 745PM configuration, 11

S

SAM, 3, 9SULIM Access Manager, 3switch access, 9

port configuration, 5switch software, 6system controller, 28, 29

T

test bus, 22, 28connections, 17

Test bus, 3Test Port

configuration, 5number, 6

TSC 720, 3, 9TSC software configuration

MU matrix port, 5Switch Access Port, 5Test Port, 5TSC port, 5

Index
