C33374_20-DIU19S

NTC C33374001PE_00 � Copyright Nokia Telecommunications Oy

CU 24020DATA UNIT 0...64 kbit/s, async/sync,

V.110, 4 channels

Operating Manual

C33374.20 A0

CU 24020 Operating Manual

NTC C33374001PE_00� Copyright Nokia Telecommunications Oyii

The following products comply with the protection requirements of the European Union Council Directive89/336/EEC relating to electromagnetic compatibility (EMC), when installed using EMC-compatible installationpractices (installation in mechanical housings stated to be EMC-compatible and using cabling material [at leastas well shielded] and practices as stated in relevant Nokia Telecommunications user manuals):

Product code Product name Release

CU 24020 Data Unit 0...64 kbit/s, async/sync, V.110, 4 channels 03A

� COPYRIGHT Nokia Telecommunications Oy 1996All rights reserved.No part of this publication may be copied, distributed, transmitted, transcribed, stored in a retrieval system, or translated intoany human or computer language without the prior written permission of Nokia Telecommunications Oy.

The manufacturer has made every effort to ensure that the instructions contained in the documents are adequate and freeof errors and omissions. The manufacturer will, if necessary, explain issues which may not be covered by the documents.The manufacturer’s liability for any errors in the documents is limited to the correction of errors and the aforementionedadvisory services.

The documents have been prepared to be used by professional and properly trained personnel, and the customer assumesfull responsibility when using them.The manufacturer welcomes customer comments as part of the process of continualdevelopment and improvement of the documentation in the best way possible from the user’s viewpoint. Please submit yourcomments to the nearest Nokia sales representative.

NOKIA and the arrows logo are registered trademarks of Nokia Corporation.

Any other trademarks mentioned in the documents are the property of their respective owners.

Nokia Telecommunications, Network and Access Systems 29.04.1996

NTC C33374001PE_00 � Copyright Nokia Telecommunications Oy iii

Document HistoryDocument Date Comment

C33374001PE_00 29.04.1996 The document is valid for unit CU 24020, ver-sion 03A, and program CS 24064.01, version01A.


NTC C33374001PE_00� Copyright Nokia Telecommunications Oyiv

NTC C33374001PE_00 � Copyright Nokia Telecommunications Oy v

Contents

1 Product Description C33374003SE_00

2 Installation C33374004SE_00

3 Operation C33374005SE_00

4 Service Menu Reference C33374002SE_00


NTC C33374001PE_00� Copyright Nokia Telecommunications Oyvi

NTC C33374003SE_00 � Copyright Nokia Telecommunications Oy


V.110, 4 channels

Product Description

CU 24020 Product Description

NTC C33374003SE_00� Copyright Nokia Telecommunications Oyii







NTC C33374003SE_00 � Copyright Nokia Telecommunications Oy iii


C33374003SE_00 29.04.1996 The document is valid for unit CU 24020, ver-sion 03A, and program CS 24064.01, version01A.


NTC C33374003SE_00� Copyright Nokia Telecommunications Oyiv

NTC C33374003SE_00 � Copyright Nokia Telecommunications Oy v

Contents

Chapter 1About This Document 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 2Introduction 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 3Operation of the Unit 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1 Blocks and Their Functions 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2 Data Interface 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2.1 ITU-T Recommendation V.14 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2.2 ITU-T Recommendations V.24 and V.28 7. . . . . . . . . . . . . . . . . . . . . . 3.2.3 V. 24 Interchange Circuits Used in the Data Unit 8. . . . . . . . . . . . . . . . 3.2.4 Timing of V.24/V.28 Interface 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2.5 ITU-T Recommendation V.110 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2.6 User Rates up to 19.2 kbit/s 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2.7 User Rates 48 and 56 kbit/s (not specified for V.24/V.28 interface) 14. . 3.2.8 User Rate 64 kbit/s (not specified for V.24/V.28 interface) 15. . . . . . . .

3.3 DYNACARD Bus Interface 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4 Operation in Duplex Mode 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 4Test Functions 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1 Internal Test Equipment 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.2 Test Loopbacks 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


NTC C33374003SE_00� Copyright Nokia Telecommunications Oyvi

Chapter 5Technical Specifications 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1 Data Interfaces 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.2 Power Consumption 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.3 Mechanical Dimensions 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

About This Document

NTC C33374003SE_00 � Copyright Nokia Telecommunications Oy 1

Chapter 1About This Document

This document describes the functional principles of Data Unit CU 24020. TheInstallation document provides instructions for connecting the signal interfacecables, and the Operation document shows how to bring the unit into use. The Ser-vice Menu Reference document describes how to control the data unit locally, byusing a Service Terminal, and details the menus used in the unit.


NTC C33374003SE_00� Copyright Nokia Telecommunications Oy2

Introduction


Chapter 2Introduction

Data Unit CU 24020 is intended for creating asynchronous and synchronousV.24/V.28 interface data connections into the 2 Mbit/s frame structure of the mainunit of the equipment (DB 2, DM 2 or DN 2). Figure 1 shows an applicationexample, where Data Unit CU 24020 has been configured as a part of DM 2, DB 2and DN 2.

DTE

V.24/V.28 DM 2

2 Mbit/s

DB 2 DN 2

2 Mbit/s

DTE

V.24/V.28

DTE

DATA UNIT

DATA TERMINALEQUIPMENT

DCE DATA CIRCUIT–TERMINATINGEQUIPMENT

DCE

DCE

DTE

V.24/V.28

2-wire/4-wire

CU 24020

1 2

3

DYNACARD BUS

DTE

V.24/V.28

2 Mbit/s

NOTE: The interface type of the data unit does not depend on the type of the equipment main unit

V.24/V.28

DTE

Figure 1 Application example of Data Unit CU 24020



In synchronous transmission, the range of available data rates is600 bit/s...64 kbit/s. In asynchronous transmission, rates up to 19.2 kbit/s areavailable.

The adaptation of data interface into the 2 Mbit/s frame structure has beenimplemented in accordance with ITU-T Recommendation V.110.

The V.110-compliant frame structure has been implemented separately for eachinterface. Depending on the data rate, the interfaces each get 1, 2, 4, or 8 bits of the8-bit time slot.

The interface-specific framing of the data interfaces enables various branchingand through-connection functions on the sub-time slot level. The transmissioncapacity is therefore effectively utilized when several slow data interfaces withdifferent routes are required.

Note Software version CS 24064.01 01A is made for special purposes, anddoes not fully comply with the V.110 and V.24 Recommendations (seeusage of V.24 circuit 111 and V.110 X-bit for flow control in chapter 3).

Operation of the Unit


Chapter 3Operation of the Unit

This chapter gives an overview of the functional blocks and interfaces of DataUnit CU 24020.

3.1 Blocks and Their FunctionsThe block diagram of the unit is shown in Figure 2. The interfaces of the basic unitcomply with ITU-T Recommendations V.24 and V.28.

An asynchronous-to-synchronous converter is used when an asynchronous DataTerminal Equipment (DTE) is added to the network. In synchronous use the con-verter is bypassed. In the conversion, the asynchronous data is synchronized to thenetwork in accordance with ITU-T Recommendation V.14.

In asynchronous transmission, the length of the character can be 8, 9, 10, or 11 bits,including the data bits, start and stop bits and the parity bit, if one is used.

The synchronous data and the specified V.24 control circuits are brought to theV110 ASIC, which comprises two data interfaces. In the transmit direction, theV110 ASIC generates the frame structure (in accordance with ITU-T Recommen-dation V.110) for each interface; in the receive direction, it releases the framing.

The unit microprocessor controls the operation of the V110 ASICs andasynchronous-to-synchronous converters in accordance with the settings givenwith the Service Terminal (ST), Macro STE (Service Terminal Emulator), orTransmission Management System (TMS). In addition, the processor controls theV.24 circuits that are not transmitted along with the V.110 frame structure.



V.28

TTL

V.28/TTL

V.110

ADAPTATION

DC

2 Mbit/sData Bus

UnitControl

UnitAddress

Battery20...72 V

102 115103 116104 125105 140106 141107 142108 TST2109 E1A111 E1B113114

102 115103 116104 125105 140106 141107 142108 TST2109 E2A111 E2B 113114

IF1

IF2

Red

Yellow

Green

102 115103 116104 125105 140106 141107 142108 TST2109111 113 114

102 115103 116104 125105 140106 141107 142108 TST2109 111 113 114

IF3

IF4

INTERFACE

2 Mbit/sDATA BUS

V.110ADAPTATION

V.110ADAPTATION

V.110ADAPTATION

+5 V +12 V –12 V

DC

DYNACARD

CONTROLLER

RAMEPROM

EEPROM

INTERFACEIF1 & IF2

MODULEOPTION

CONVERSION

V.28/TTLCONVERSION

V.28/TTL

CONVERSIONV.28/TTL

CONVERSIONV.28/TTL

ASYNC/SYNCCONVERSION




DYNACARDBUS

ExternalVoltage+5 V

V.14

V.14

V.14

V.14

P2

P4

PB1

Figure 2 Functional Blocks of Data Unit CU 24020



3.2 Data InterfaceThe ITU-T Recommendations relating to the data interfaces are:

� V.14� V.24� V.28� V.110

3.2.1 ITU-T Recommendation V.14

ITU-T Recommendation V.14 describes a method of conveying start-stopcharacters over a synchronous connection with user data rates up to 19.2 kbit/s.This method tolerates variations in the user data rates of the Data Terminal Equip-ment (DTE) within two ranges:

� basic range: +1 to –2.5% of the nominal rate� extended range: +2.3 to –2.5% of the nominal rate

This data unit supports the basic range.

3.2.2 ITU-T Recommendations V.24 and V.28

ITU-T Recommendation V.24 defines the use of interchange circuits in data trans-mission. ITU-T Recommendation V.28 defines the electrical characteristics of theinterchange circuits. Recommendation V.28 corresponds to the EIA 232 standard(former RS-232).

The interface circuits of the data interfaces between the data unit and the data ter-minal equipment are connected to the two front Euroconnectors of the unit. Theinterface circuits have been arranged as interface-associated groups, thus allow-ing for cabling with either a full-size Euroconnector or a quarter-size Euro-connector (3x7 pins).

The standard V.24/V.28 interface has been defined for transmission rates0...19.2 kbit/s. However, Data Unit CU 24020 allows even transmission rates 48,56 and 64 kbit/s to be used. When these higher data rates are used, the cablesshould be shorter (See the Installation part for the recommended cable lengths andtypes).



3.2.3 V. 24 Interchange Circuits Used in the Data Unit

ITU-TV.24

Circuit name Direction DTE – DCE (Data Unit)

Comments

102 Signal ground

103 Transmitted data – – >

104 Received data < – –

105 Request to send – – >

106 Ready for sending < – –

107 Data set ready < – –

108 Data terminal ready – – >

109 Received line signaldetector

< – –

113 Transmitter signalelement timing

– – > Network-independent tim-ing is not supported

114 Transmitter signalelement timing

< – –

115 Received signalelement timing

< – –

Table 1 Use of V.24 circuits according to ITU-T Recommendation V.110

ITU-TV.24

Circuit name Direction DTE – DCE (Data Unit)

Comments

111 Data signal rateselector

– – > Can be monitored; usedin flow control

116 Select standby – – > Can be monitored; use ofthe circuit is not specified

125 Calling indicator < – – Can be forced; use of thecircuit is not specified

140 Loopback/Mainten-ance test

– – > Can be used as circuit141; circuit 140 controlledremote loopback is notsupported

141 Local loopback – – >

142 Test indicator < – –

Table 2 Exceptional use of V.24 circuits



3.2.4 Timing of V.24/V.28 Interface

In the asynchronous operating mode, the Data Terminal Equipment (DTE) trans-mits and receives data in phase with its own clock. The speed difference betweenthe clocks used in the DTE and the data unit is compensated for by manipulatingthe stop bits of the asynchronous data (Figure 3).

DTE DTE

103

104 104

DYNACARD-MUX

2 Mbit/s

DYNACARD-MUX

Data Unit

114 114

103

DYNACARD BUS

Asynchronous-synchronous conversion (V.14)

Figure 3 Asynchronous-synchronous conversion to the network clock

In the synchronous operating mode, there are two timing principles available:contra-directional and co-directional timing. In the contra-directional timing, theData Circuit-Terminating Equipment (DCE), in this case the data unit, generatesboth timing circuit 114 and circuit 115 for the DTE (Figure 4). The timing circuitsare generated in the data unit from the network 2048 MHz clock.

DTE DTEDYNACARD–

MUX

2 Mbit/s

DYNACARD–MUX

Data Unit

103

114

104

115

103

114

104

115

DYNACARD BUS

Figure 4 DTE connection with contra-directional timing

Timing circuit 113 can be used for transmission, provided that the circuit is syn-chronized to timing circuit 115. In this case, timing circuit 115 is looped back atthe DTE as timing circuit 113 (Figure 5). This timing principle is known as co-directional timing.



DTE DTEDYNACARD-

MUX

2 Mbit/s

DYNACARD-MUX

Data Unit

103

104

115

103

114

104

115

113

DYNACARD BUS

Figure 5 DTE connection with co-directional timing

When a synchronous modem connection is used, circuit 115 synchronizes thewhole network, in which case circuit 115 is looped at the remote modem andbrought back to the data unit as circuit 113 (Figure 6). Network-independenttiming is not supported.

2 Mbit/s

DYNACARD-MUX

Data Unit

103

104

115

113

DTE DCE

103

114

104

115

104

115

103

113

DCE

DYNACARD BUS

Figure 6 DTE connection with modems



3.2.5 ITU-T Recommendation V.110

�� ! "� ��

#�� $�� % ��&�� &��'�� &�� (� � ��%�� ) � *��(� �� +,-.(� "� /�� ,* .(� "� �� 0+ .(� "� �� & � � �� +, .(� "� /�� 12� �� +,�(� ��

S/TR

2 .8 kbit/sk

RA1 RA2

64 kbit/s

2 .8 kbit/sk

Step 1 Step 2

RA0

Step 3

stop bitmanipulation

2 .600bit/sn

Figure 7 Three-step bit rate adaptation according to ITU-T Recommenda-tion V.110

3.2.6 User Rates up to 19.2 kbit/s

The data unit adapts the V.24/V.28 interface into the intermediate rate in accord-ance with ITU-T Recommendation V.110. Table 3 presents the intermediate ratefor each user rate. Note that the V-series rates 7.2, 12 and 14.4 kbit/s are not sup-ported.

User rate bit/s Intermediate rate kbit/s bits/time slot

600 8 1

1200 8 1

2400 8 1

4800 8 1

9600 16 2

19200 32 4

Table 3 Adaptation of user rate into intermediate rate and further into atime slot



The structure of the V.110 frame for rates up to 19.2 kbit/s is shown in Figure 8.When rates 600, 1200 or 2400 bit/s are used, each of the data bits is repeated 8, 4 or2 times, respectively (see also Table 4).

For example, with data rate 600 bit/s, the first data bit is located in bit positionsD1–D8, the next data bit in bit positions D9–D16 etc.

For rates 4800...19200 bit/s, 48 actual data bits are obtained in a frame, whichgives a 60-percent efficiency for the transmission capacity.

ÀÀÀÀÀÀ ÀÀÀÀ

ÀÀÀÀÀÀÀÀ

ÀÀÀÀÀÀÀÀÀ

ÀÀÀÀÀÀ

Bit number

1 2 3 4 5 6 7 8

01

1 D2 D3 D4 D5 D62

0 0 0 0

Octet number

D1 S1

1 D8 D9 D10 D11 D123 D7 X

1 D14 D15 D16 D17 D184 D13 S3

1 D20 D21 D22 D23 D245 D19 S4

6 E2 E3 E4 E5 E6 E7E11

1 D26 D27 D28 D29 D307 D25 S6

1 D32 D33 D34 D35 D368 D31 X

1 D38 D39 D40 D41 D429 D37 S8

1 D44 D45 D46 D47 D4810 D43 S9

V.110 frame synchronization pattern

Data bits D1...D48

S- and X-bits

E-bits

0 00

Figure 8 Structure of V.110 frame for user rates up to 19.2 kbit/s

In data transmission mode, the S- and X-bits of the frame contain control data ofthe interface. The state of the V.24 circuit 108 is transmitted in bits S1, S3, S6 and



S8 (known as SA bits) of the frame. In the receive direction, the bits are received ascircuit 107.

Correspondingly, circuit 105 is transmitted in bits S4 and S9 (known as SB bits) ofthe frame; in the receive direction, the bits are received as circuit 109.

The X-bits of the frame are used to transmit flow-control information: circuit 111is transmitted in an X-bit; in the receive direction, this bit is seen as circuit 106.

Note The use of the X-bit and circuit 111 together does not comply with ITU-Trecommendations V.110 and V.24.

Bits E1, E2 and E3 are used to transmit information of the user rate; i.e. they indi-cate whether the data bits in the V.110 frame are repeated (rates 600, 1200 and2400 bit/s). Bits E4, E5 and E6 are used to transmit phase information on the net-work-independent timing. Since the data unit does not support network-indepen-dent timing, these bits are not in use. Bit E7 is not used either. The function of bitE7 is to transmit the synchronization information on the 4 x 80-bit multiframewith a 600 bit/s rate.

Intermediate rate kbit/s

8 16 32

E-bits Repetition ofdata bits(times)

user rate bit/s E1 E2 E3 E4...E7

600 1 0 0 1111 8

1200 0 1 0 1111 4

2400 1 1 0 1111 2

4800 9600 19200 0 1 1 1111 1

Table 4 Use of E-bits in the data unit

The data unit matches the intermediate rate into a time slot in the 2 Mbit/s framestructure and allocates 1, 2 or 4 bits, depending on the user rate. This adaptationcorresponds to the third phase adaptation to the 64 kbit/s B-channel (according tothe V.110 Recommendation). The time slot and the time slot bits are freely select-able for each interface. Even the transmit and receive direction bits can be selectedirrespective of each other. Several interfaces can be multiplexed into one time slot(conforming to Recommendation I.460, flexible multiplexing).

The frame synchronization is considered accomplished when two error-free V.110frames have been received in succession (no errors in the fixed 17-bit frame syn-chronization pattern). The frame synchronization is lost when three erroneousframes are received in succession, each frame containing at least one bit error inthe fixed 17-bit frame synchronization pattern.



3.2.7 User Rates 48 and 56 kbit/s (not specified for V.24/V.28 inter-face)

User rates 48 and 56 kbit/s are adapted directly into an 8-bit time slot in accordancewith Table 5 and Figures 9, 10. The adaptation complies with the adaptation to the64 kbit/s B-channel (V.110 Recommendation).

The frame synchronization is considered accomplished when five (48 kbit/s) orfour (56 kbit/s) error-free V.110 frames have been received in succession. Theframe synchronization is lost when three erroneous frames are received in suc-cession.

User rate kbit/s Intermediate rate kbit/s Bits/time slot

48 64 8

56 64 8

Table 5 User rates 48 and 56 kbit/s

D14 D15 D16 D17

B1 B2 B3 B4 B5 B6 B7 B8number2 Mbit/s frame

1 D2 D3 D4 D5 D6n D1 S1

0 D8 D9 D10 D11 D12n+1 D7 X

1 D18n+2 D13 S3

1 D20 D21 D22 D23 D24n+3 D19 S4


Data bits D1...D24

S- and X-bits

A time slot of the 2 Mbit/s frame

TS0 TS31

2 Mbit/s frame

TS1 TS30

Figure 9 Adaptation of user rate 48 kbit/s into a time slot



number2 Mbit/s frame

D2 D3 D4 D5 D6n D1 0

D8 D9 D10 D11 D12n+1 X

D15 D16 D17 D18n+2 S3D20 D21

D25 D26 D27n+3

D19

S4


Data bits D1...D56

S- and X-bits

D7

D8 D14D13

D15 D21

D22 D23 D24 D28

D30 D31 D32 D34 D35D29 1

D8 D38 D39 D40 D41n+5

D15 D45 D46 D47n+6 D49D21

D54 D55 D56n+7

D48

D37 D42

D44

D50D51 D52 D53 1

1

1

D50 D56

D49D43

D36

D35D33n+4

B1 B2 B3 B4 B5 B6 B7 B8

A time slot of the 2 Mbit/s frame

TS0 TS31

2 Mbit/s frame

TS1 TS30

Figure 10 Adaptation of user rate 56 kbit/s into a time slot

3.2.8 User Rate 64 kbit/s (not specified for V.24/V.28 interface)

Adaptation of user rate 64 kbit/s is transparent.

User rate kbit/s Intermediate rate kbit/s Bits/time slot

64 64 8

Table 6 Adaptation of user rate 64 kbit/s



3.3 DYNACARD Bus InterfaceThe data interfaces of the data unit are connected to the main unit of the equipment(DB 2, DM 2 or DN 2) via the DYNACARD bus on the motherboard. The DYNA-CARD bus consists of two 2 Mbit/s serial buses: one serves as a data and signallingbus, and the other as a master-slave control bus. The signals on the DYNACARDdata and signalling buses are multiplexed to the external 2 Mbit/s interface signalsby the equipment main unit. With the exception of multiframing and signalling,the structure of the DYNACARD buses is based on the 2 Mbit/s frame structure asdefined in ITU-T Recommendation G.704.

The main unit control bus is a slow asynchronous data channel used for communi-cation between the equipment main unit and several tributary units, e.g. the dataunit. Every unit installed in a cartridge or subrack has its own, individual address,which indicates the location of the unit in the cartridge.

3.4 Operation in Duplex Mode3�� 4 �� )�� (�� % �4�� 5�(� �� )� �� 6 7 ��

8�� ) '�� )� �� % �� '� �� 27(� "� (��% �� )�� (� � � �� (��& 99�: � � �% �� % �� (� ��

�� 3! � � � �� * �� $�� $� �� 4�� (� � � (��& 99�: � � � �� 5�(� � �� 3$$ �(��& 99�:�� &% �� '�� &��;� � �� '�� &��;� �� '�� % ��

�� * �� (�� !� � ��% �� 3! � � �� & � �� $� � � �� &��;� �� '��

8�� (�� &��;��% � � �� 5�(� �� )��) ��% �� 0 �� * �� (� � �� <�� 1�� (� � �� '� �� % ��(� � �� ,% �� (� � �� = �� >% �� 5�(� �� +� �� + �� & ��(��

� � �� % �� 5�(� � ��'� �� .�) ��)�� !� �� (�� (� � �� '� (�� &��;�� & � ��

If synchronization is lost, the interface enters the FRS state again and the X-bit ofthe outgoing frame is set to OFF state. Circuit 106 is controlled to the DTE state

Operation in Duplex Mode


OFF, but circuits 107 and 109 remain in, or are controlled into ON state. If syn-chronization is not achieved within three seconds, the interface enters the Discon-nect State (DS). A change from the DTS state into the DS state also occurs whenDTE circuit 108 has been defined to be used and is switched into OFF state.

In the DS state, the D-bits of the outgoing frame have been set to binary ‘‘0” stateand the S-bits have been set to OFF state to indicate a request to interrupt. Whenthe 12-ms time-out has elapsed, the interface enters the IS state. Transmission ofthe frame is then terminated; that is, the continuous binary ‘‘1” state is transmitted.The same procedure is performed when synchronization is lost. The IS state canalways be entered by deactivating the interface.



SYNCHRONIZEDFRAME: D=103, SA=108

SB=105, X=111DTE: 104=Drx, 106= Xrx

107=SArx, 109=SBrx

POWER UP

IDLE (READY)

FRAME SEARCH

DISCONNECT

RESETFRAME:1DTE: 104=1, 106=OFF

107=OFF,109=OFF

IS

ACTIVATE AND 108=ONFRAME: D=1, SA=OFF

SB=OFF, X=OFFTIMER=10s (108 keying)

FRS

TIMER EXPIREDFRAME: D=0, SA=OFF

SB=OFF, X=OFF

SYNCHRONIZATION LOSTFRAME: X=OFFDTE: 104=1, 106=OFF

107=ON, 109=ONTIMER=3s (108 keying)

DTS

108=OFFFRAME: D=0, SA=OFF

SB=OFF, X=ONDTE: 106=OFF TIMER: 12 ms

DEACTIVATE

FRAME:1DTE: 104=1, 106=OFF

107=OFF, 109=OFF

DEACTIVATE

DEACTIVATE

DS

TIMER EXPIREDSYNCHRONIZATION LOST OR

Explanatory notes:SASB

= S1, S3, S6, S8 in transmitted frame= S4, S9 in transmitted frame

SArx = SA in received frame

Xrx = X in received frameDrx = D in received frame

TIMER=10s (108 keying)

DATA TRANSFER

SBrx = SB in received frame

Figure 11 State diagram of duplex transmission mode

Test Functions


Chapter 4Test Functions

The data unit provides several self-testing features to test the unit itself. Further-more, the whole telecommunication link can also be tested piece by piece by usingloopbacks. The loopbacks can be set either with the DTE, Service Terminal (ST),Macro STE (Service Terminal Emulator), or Transmission Management System(TMS).

4.1 Internal Test EquipmentThe data unit includes a built-in synchronous test transceiver, through which theoperation of the unit can be tested either internally or as a part of the telecommuni-cations network.

Test Signals� ITU-T V.52-compliant test sequence PR511� 1:1 data pattern, alternating ‘‘1” and ‘‘0” sequence� Permanent binary ‘‘1” state� Permanent binary ‘‘0” state

Operating Modes� Test transmitter and receiver� Test transmitter only� Test receiver only

Connections of Test Equipment� Towards DTE (synchronous operating mode only)� Towards 2 Mbit/s bus (synchronous operating mode only)

� V.110-framed� Transparent (64 kbit/s)



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V.110time slot

TEST EQUIPMENT

Transmitter

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2 Mbit/s

conversion rate adaptation

2 Mbit/s

allocation

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1:1PR511

01

1:1PR511

600 bit/s to 19.2 kbit/s48 kbit/s56 kbit/s64 kbit/s

8 kbit/s16 kbit/s32 kbit/s64 kbit/s

Figure 12 Connecting the internal test equipment

Test Functions


4.2 Test LoopbacksTest loopbacks are usually controlled by the Service Terminal (ST), Macro STE(Service Terminal Emulator) or Transmission Management System (TMS). Datacan also be looped at the far end, if the TMS bus has been connected there, seeFigure 13.

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104

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2

DM 2

DYNACARDBUS

DYNACARDBUS

Data UnitCU 24020

Loop 1 to interface (L1)

Loop 2 to equipment bus (L2)

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2

Figure 13 Test loopbacks



Loopbacks in the Data Unit (see figure 14)1. Loop to the V.24/V.28 interface, controlled by

� Service Terminal, Macro Service Terminal Emulator, TMS� DTE circuit 140 or 141

2. Loop to the 2 Mbit/s bus, controlled by

� Service Terminal, Macro Service Terminal Emulator or TMS

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DSP1

V.110

1

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2

adaptation

asynchronousV.28/TTLconversion

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tosynchronousconversion

rateDYNACARD

Loop to equipment bus

Figure 14 Loopbacks in the Data Unit

Technical Specifications


Chapter 5Technical Specifications

5.1 Data InterfacesFour data interfaces with the following characteristics:

General

Direction Bidirectional

Equipment type Data circuit-terminating equipment (DCE)

Interface signals, functional ITU-T Rec. V.24

Interface signals, electrical ITU-T Rec. V.28

Table 7 General characteristics

Implemented V.24 circuits Note

105, 106, 107, 108, 109

111 used for GSM application; flow control

113 network-independent timing is not supported; use ofthe circuit is not possible with user rate 64 kbit/s

114, 115

116 can be monitored; use of the circuit is not specified

125 can be forced; use of the circuit is not specified

140 can be used as circuit 141; remote loopback con-trolled by circuit 140 is not supported

141, 142

Table 8 Implemented V.24 circuits



Operating mode Data bit rate Note

Asynchronous 0...600, 1200, 2400, 4800, 9600,and 19200 bit/s

Synchronous 600, 1200, 2400, 4800, 9600, and19200 bit/s

Synchronous 48, 56, and 64 kbit/s Not specified for standardV.24/V.28 interface; seeInstallation part for cablerecommendations

Table 9 Operating modes and data bit rates

Use of 64 kbit/s time slot bits

0...4800 bit/s 1 bit

9600 bit/s 2 bits

19200 bit/s 4 bits

48, 56 and 64 kbit/s 8 bits

Table 10 Use of 64 kbit/s time slot bits

Rate adaptation method

0...600 bit/s 4.8 kHz Sampling + ITU-T Rec. V.110

600...19200 bit/s ITU-T Rec. V.110

48 and 56 kbit/s ITU-T Rec. V.110

64 kbit/s Transparent

Table 11 Rate adaptation method

Asynchronous mode features

Asynchronous to synchronousconversion

ITU-T Rec. V.14

Number of bits Start + 6...9 data + 1 stop

Bit rate tolerance –2.5...+1 %

Table 12 Asynchronous mode features

Technical Specifications


5.2 Power Consumption

Power consumption

Battery voltage –20...–72 V

Power consumption 3 W max

Table 13 Power consumption

5.3 Mechanical Dimensions

Mechanical dimensions

Height 233 mm (6 U)

Width 20 mm (4 T)

Depth 160 mm

Weight 300 g

Table 14 Mechanical dimensions





V.110, 4 channels

Installation

CU 24020 Installation














Contents


Chapter 2General 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 3Installing the Unit in a Cartridge 5. . . . . . . . . . . . . . . . . . . . . . . . . . 3.1 Back Connector PB1 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2 Equipping 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 4Signal Interfaces and Their Cabling 9. . . . . . . . . . . . . . . . . . . . . . . 4.1 Connectors and Cables 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.2 Cabling Examples 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.3 Signal Interfaces 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.4 Marking of Cabling 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .



About This Document



This document describes how to install Data Unit CU 24020 in a cartridge and howto connect the cables to the signal interfaces.

Relation to Other DocumentsThe Product Description document describes the functional principles of the unit,and the Operation document shows how to bring the unit into use. The ServiceMenu Reference document describes how to control the data unit locally, by usinga Service Terminal, and details the menus used in the unit.

General cabling instructions and connection instructions for connectors conform-ing to the TM4 Construction Practice are found in the Operating Handbook forTM4 Construction Practice.



General


Chapter 2General

Caution Use wrist grounding or other such protection when handling aplug-in unit removed from its package.

The data units are ready to operate as soon as they have been installed in a cartridgeand the signal cables have been connected.

Note that one data unit reserves space for 13 alarms in the fault supervision table ofthe main unit. This may, in certain cases, affect the maximum size of the equip-ment configuration. (For further information, see the operating handbook for themain unit concerned.)



Installing the Unit in a Cartridge


Chapter 3Installing the Unit in a Cartridge

3.1 Back Connector PB1When the data unit is installed in a cartridge, the central battery voltage is con-nected to the unit via the motherboard of the cartridge and the back connector PB1of the unit. The power supply of the unit generates the necessary operating volt-ages, which are brought to the PB1 connector for test purposes. Two external +5 Vvoltages are needed for driving the red service LED and interfacing the DYNA-CARD control and data buses.

The connectors on the motherboard of the cartridge and the back connectors of theunits have been standardized so that certain signals are always located at the samepins, as shown in Figure 1. Therefore, any type of interface unit can be installed inany location in the cartridge. The data unit can be installed in any free unit locationin any TM4 cartridge which contains a DYNACARD-MUX unit. The same car-tridge may also contain other Nokia equipment of the same generation.



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External aux. voltage +5 VGround

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Back connector PB1DescriptionDescription Signal Signal

+5 V for testing

–12 V for testing+12 V for testing

Figure 1 Back connector PB1 of the data unit

Installing the Unit in a Cartridge


3.2 EquippingThe data unit requires one unit location (width 5 T) in the cartridge. Figure 2shows an equipping example, where three data units have been installed in a 20-Tcartridge.

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Figure 2 An example where data units have been configured in a DM 2: a20-T cartridge houses a PCM multiplex equipment consisting of aMUX unit and three Data Units CU 24020.



Signal Interfaces and Their Cabling


Chapter 4Signal Interfaces and Their Cabling

The incoming and outgoing data and clock circuits between the data unit and theterminal equipment are wired to the two front Euroconnectors of the unit (see Fig-ures 3–5 and Tables 1–8).

4.1 Connectors and CablesNote For the cabling between the data unit and other equipment, use only a

special cable designed for data communication purposes.

The pin numbering of the data unit interfaces is shown in Figure 3.

The interfaces can be cabled either by connector, in which case you should use afull-size Euroconnector, or by interface, in which case you should use a quarter-size (3 x 7-pin) Euroconnector; see Figures 4 and 5.

When data rates over 19.2 kbit/s are used, the cable should be Nokia typeMMHS 8x2x0.4+0.4 or corresponding and less than 2 meters long to guaranteeerror-free data transmission. Under favourable circumstances the length of thecable can be increased up to 4 meters.



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Figure 3 Front connectors of Data Unit 24020



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Figure 4 Cabling with a full-size Euroconnector



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Figure 5 Cabling with a quarter-size Euroconnector



4.2 Cabling ExamplesThe data interfaces can be cabled with either quarter-size or full-size Euroconnec-tors. It is essential that you know the application for which the data interfaces areused, because in many cases only a few of the V.24 circuits are needed.Figures 6 – 11 give cabling examples for the most common situations:

� Complete cabling, which covers asynchronous and synchronous trans-mission with all control circuits connected.

� Cabling for asynchronous transmission with all V.110 control circuits con-nected.

� Cabling for asynchronous transmission with only data circuits connected.

Note In the examples, the direction is indicated with respect to the unit.

Complete cabling with all control and clock circuits connected is shown in Figures6 and 7. The following circuits are needed:

� Ground and data circuits:102, 103 and 104

� Control circuits transferred in a V.110 frame:105, 106, 107, 108, 109 and 111

� Clock circuits:113, 114 and 115

� Other circuits:125, 140, 141 and 142

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Figure 6 Complete cabling of data interface with a quarter-size Eurocon-nector (cable MMHS 8 x 2 x 0.4 + 0.4)



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Cabling for asynchronous transmission with V.110 control circuits connected isshown in Figures 8 and 9. The following circuits are needed:


� Control circuits transferred in a V.110 frame:105, 106, 107, 108, 109 and 111

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Figure 9 Cabling for asynchronous transmission with V.110 circuits con-nected; full-size Euroconnector (cable MMHS 8 x 2 x 0.4 + 0.4)

Cabling for asynchronous transmission with only data circuits connected is shownin Figures 10 and 11. The following circuits are needed:


Usually some of the control circuits are needed for handshaking. To enable trans-mission, connect the necessary control circuits and force them ON.

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Figure 10 Cabling for asynchronous transmission with only data circuits con-nected; quarter-size Euroconnector (cable MMHS 2 x 2 x 0.4)



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Figure 11 Cabling for asynchronous transmission with only data circuits con-nected; full-size Euroconnector (cable MMHS 4 x 2 x 0.4 + 0.4)



4.3 Signal Interfaces

Interface 1

Symbol V.24 Pin Use Note

A102 102 P2a31, P2a29P2b25, P2c25 Signal ground

A103 103 P2b31 Transmitted data

A104 104 P2c31 Received data

A105 105 P2a30 Request to send

A106 106 P2b30 Ready for sending

A107 107 P2c30 Data set ready

A108 108 P2b27 Data terminal ready

A109 109 P2b29 Received line signaldetector

A113 113 P2c26 Transmitter signalelement timing

Network independenttiming is not supported

A114 114 P2a28 Transmitter signalelement timing

A115 115 P2c28 Received signalelement timing

Table 1 Use of circuits according to Recommendation V.110, interface 1


A111 P2b26 Flow control

A116 P2c29 Can be monitored; use of the cir-cuit is not specified

A125 P2a26 Can be forced; use of the circuit isnot specified

ATST2 P2b28 Can be forced; use of the circuit isnot specified

A140 P2c27 Can be used as circuit 141; remoteloopback controlled by circuit 140is not supported

A141 141 P2a27 Local loopback

A142 142 P2a25 Test indicator

GND Ground for cablesheath

Table 2 Other circuits (cables connected when required), interface 1



Interface 2


B102 102 P2a15, P2a13P2b09, P2c09 Signal ground

B103 103 P2b15 Transmitted data

B104 104 P2c15 Received data

B105 105 P2a14 Request to send

B106 106 P2b14 Ready for sending

B107 107 P2c14 Data set ready

B108 108 P2b11 Data terminal ready

B109 109 P2b13 Received line signaldetector

B113 113 P2c10 Transmitter signalelement timing

Network-independenttiming is not supported

B114 114 P2a12 Transmitter signalelement timing

B115 115 P2c12 Received signalelement timing



B111 P2b10 Flow control

B116 P2c13 Can be monitored; use of the cir-cuit is not specified

B125 P2a10 Can be forced; use of the circuit isnot specified

BTST2 P2b12 Can be forced; use of the circuit isnot specified

B140 P2c11 Can be used as circuit 141; remoteloopback controlled by circuit 140is not supported

B141 141 P2a11 Local loopback

B142 142 P2a9 Test indicator

GND Ground for cablesheath

See Figure 3




Interface 3


C102 102 P4a31, P4a29P4b25, P4c25 Signal ground

C103 103 P4b31 Transmitted data

C104 104 P4c31 Received data

C105 105 P4a30 Request to send

C106 106 P4b30 Ready for sending

C107 107 P4c30 Data set ready

C108 108 P4b27 Data terminal ready

C109 109 P4b29 Received line signaldetector

C113 113 P4c26 Transmitter signalelement timing


C114 114 P4a28 Transmitter signalelement timing

C115 115 P4c28 Received signalelement timing



C111 P4b26 Flow control

C116 P4c29 Can be monitored; use of the cir-cuit is not specified

C125 P4a26 Can be forced; use of the circuit isnot specified

CTST2 P4b28 Can be forced; use of the circuit isnot specified

C140 P4c27 Can be used as circuit 141; remoteloopback controlled by circuit 140is not supported

C141 141 P4a27 Local loopback

C142 142 P4a25 Test indicator




Interface 4


D102 102 P4a15, P4a13P4b09, P4c09 Signal ground

D103 103 P4b15 Transmitted data

D104 104 P4c15 Received data

D105 105 P4a14 Request to send

D106 106 P4b14 Ready for sending

D107 107 P4c14 Data set ready

D108 108 P4b11 Data terminal ready

D109 109 P4b13 Received line signaldetector

D113 113 P4c10 Transmitter signalelement timing


D114 114 P4a12 Transmitter signalelement timing

D115 115 P4c12 Received signalelement timing



D111 P4b10 Flow control

D116 P4c13 Can be monitored; use of the cir-cuit is not specified

D125 P4a10 Can be forced; use of the circuit isnot specified

DTST2 P4b12 Can be forced; use of the circuit isnot specified

D140 P4c11 Can be used as circuit 141; remoteloopback controlled by circuit 140is not supported

D141 141 P4a11 Local loopback

D142 142 P4a9 Test indicator




4.4 Marking of CablingMark the cables so that it is later possible to see to which unit and connector theylead. Record the cabling information on the marking card delivered with the unit.A properly filled card also facilitates later servicing, testing and installation.

Instructions concerning the markings can be found in the Operating Handbook forthe TM4 Construction Practice.





V.110, 4 channels

Operation

CU 24020 Operation











CU 24020 Operation



Contents


Chapter 2Start-up of a New Unit 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 3Settings 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 4Maintenance 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1 Tests 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.2 Statistics 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.3 Alarms 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.4 State and Fault Messages 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CU 24020 Operation


About This Document



This document covers the following topics:

� How to bring Data Unit CU 24020 into use for the first time.� How to observe the quality of transmission.

Relation to Other DocumentsThe Product Description document describes the functional principles of the unit,and the Installation document provides instructions for connecting the cables. TheService Menu Reference document describes how to control the data unit locally,by using a Service Terminal, and details the menus used in the unit.

CU 24020 Operation


Start-up of a New Unit


Chapter 2Start-up of a New Unit

This chapter explains the procedure for bringing the data unit into use for the firsttime.

The recommended way to start up a new unit is the following:

1. Place the unit in the cartridge; if the unit is not installed, the red service LEDwill turn on.

2. Connect the Service Terminal to the service connector of the DYNACARD-MUX and establish a connection to the equipment (interface cables discon-nected) by assigning command OBJ 7 RET. You will receive this response:

Current object:AD 4095/DM 29600 bit/s/EOB/

The green LED turns on to indicate that a connection from the Service Terminal tothe equipment has been established.

3. Install the unit by selecting TOP 6,2,3 RET. You will receive the followingresponse:

Installing/EOB/

The installation will take approximately 10 minutes.

When the red LED has gone off, make sure that the unit has been installed byassigning command TOP 6,2,0 RET. A response example:

MUX–2M unit 1DIU–19S unit 2DIU–19S unit 3DIU–19S unit 4/EOB/

CU 24020 Operation


4. Deactivate all active interfaces by assigning command TOP 6,9,u,1 RET

(u = unit location). The unit should now respond by displaying Done.

5. Run channel tests for each interface by assigning command TOP 9,9,u,2,ch RET

(ch = channel 1...4). The unit should now respond by displaying Channel ok.

6. Check error messages given by the equipment by assigning commandTOP 1 RET.

The data unit is now ready to receive the settings.

Settings


Chapter 3Settings

The unit is provided with factory settings, which can be modified whenevernecessary. You can also read the settings from one interface and save them toanother with the Service Terminal. The controlling of the data unit locally,through the service interface of the equipment’s main unit (DYNACARD-MUX),is described in further detail in document Service Menu Reference.

CU 24020 Operation


Maintenance


Chapter 4Maintenance

The data unit does not require any scheduled maintenance. Servicing is requiredonly when faults are indicated by alarms. The self-tests performed by the unititself are useful for further location of any faults that may occur.

4.1 TestsThe data unit can perform the following self-tests:

� Channel testsTest the operation of each interface of the unit with all operation modes andtransmission rates.

� A/D testTests the A/D converter of the unit.

� Memory testsTest the memory operations of the RAM, EPROM and EEPROM of the unit.

The data unit is equipped with an interface-specific test transmitter/receiver,which, along with the unit loopbacks, can be used to test the connection withouthaving to use any separate measuring instruments.

4.2 StatisticsThe data unit gathers information for the following statistics:

� CPU resetCounts the CPU resets.

� Loss of V.110 frame alignmentDetects V.110 frame alignment losses.

CU 24020 Operation


4.3 AlarmsWhen the red service LED is on, there is usually a serious fault in the unit and itwill have to be replaced with a new one. In the data unit, the red service LED isused also to indicate bit errors on the transmission path when the unit is in testmode.

The yellow service LED indicates that the unit is in test mode, that a loopback hasbeen set, that an interface is queuing for activation, that the incoming line signal ismissing, or that the frame synchronization has been lost. The fault is thus notnecessarily in the unit that indicates the alarm.

The green service LED is on when the unit is accessed by the Service Terminal.

4.4 State and Fault MessagesThe state and fault messages of the data unit are listed in Table 1. The fault displayof the unit can be read by assigning command TOP 1 with the Service Terminal.

Note that one data unit reserves space for 13 alarms in the fault supervision table ofthe main unit. This may, in certain cases, affect the maximum size of the equip-ment configuration. (For further information, see the operating manual for themain unit concerned.)

Fault code

Dec Hex

Fault message LED Rackalarm

Fault

020 14 Blocked from use yellow B Queuing for activation

021 15 Loop to interface yellow B Loop to interface

022 16 Loop to equipment yellow B Loop to equipment bus

023 17 Test mode yellow B Test generator on

061 3D No incoming linesignal

yellow B Fault code reserved, butnot in use

096 60 BER alarm red A Bit error rate alarm of testgenerator

122 7A Synchronizing fault yellow A V.110 frame synchroniza-tion fault

130 82 Memory fault red A Memory fault

142 8E Installation error red A Fault code reserved, butnot in use

148 94 Equipment reset red A Unit reset in progress

149 95 Forced indication red/yellow/– A Forced indication of LEDs

159 9F Run diagnostic tests red A Miscellaneous faults

Table 1 State and fault messages of the data unit



V.110, 4 channels

Service Menu Reference

CU 24020 Service Menu Reference














Contents


Chapter 2Service Menus 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 3How to Control and Access the Unit with Service Terminal 13. . . .

Control Principle 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Accessing the Data Unit 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 4Service Terminal Main Menu 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 5Data Unit Menus 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1 Fault Display 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.2 Identifications 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,9,u DIU-19S Identifications 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,9,u,3 User Manual 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,9,u,5 HW-unit ID 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,9,u,6 Program ID 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.3 Controls 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5,9,u DIU-19S Controls 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5,9,u,1 To Normal State 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5,9,u,2 Interface Controls 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5,9,u,2,ch,6 Test Generator 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5,9,u,2,ch,6,1 Test Pattern 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5,9,u,2,ch,6,2–4 Tx/Rx Connection 22. . . . . . . . . . . . . . . . . . . . . . . .



5.4 Settings 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u DIU-19S Settings 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,1 Deactivate Channels 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,2 Channel Settings 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,3 Copy Channel 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,4 Default Settings 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,5 Activate Channel 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,6 Deactivate Channel 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,7 Control Time-out 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,8 Read/Save All 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.5 Channel Settings 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,2,ch Channel Settings (ch = channel) 26. . . . . . . . . . . . . . . . . . 6,9,u,2,ch,1 V.28 Interface Type 26. . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,2,ch,2 V.24 Circuits 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,2,ch,2,1 Circuit 105 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,2,ch,2,2 Circuit 106 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,2,ch,2,3 Circuit 107 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,2,ch,2,4 Circuit 108 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,2,ch,2,5 Circuit 109 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,2,ch,2,6 Other Circuits 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,2,ch,2,6,4 Circuit 140 Use for Local Loop 29. . . . . . . . . . . . . . 6,9,u,2,ch,2,6,5 Circuit 141 Use for Local Loop 29. . . . . . . . . . . . . . 6,9,u,2,ch,2,6,6 Circuit 142 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,2,ch,3 Operating Mode 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,2,ch,3,1 Synchronous Mode 30. . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,2,ch,3,1,1 Data Bit Rate for Synchronous Mode 30. . . . . . . . . . 6,9,u,2,ch,3,1,2 Tx Timing 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,2,ch,3,1,3 Transfer Mode 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,2,ch,3,2 Asynchronous Mode 32. . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,2,ch,3,2,1 Data Bit Rate for Asynchronous Mode 32. . . . . . . . . 6,9,u,2,ch,3,2,2 Character Length for Asynchronous Mode 32. . . . . 6,9,u,2,ch,3,2,3 Transfer Mode for Asynchronous Mode 33. . . . . . . . 6,9,u,2,ch,4 Time Slot Allocations 33. . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,2,ch,5 Activate Channel 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,2,ch,6 Deactivate Channel 33. . . . . . . . . . . . . . . . . . . . . . . . . . . 6,9,u,2,ch,8,mode,bit rate,char len,bitmask,time slotSet Channel Settings (hidden menu branch) 34. . . . . . . . . . . . . . . . . . 6,9,u,2,ch,9 Deactivate Channel (hidden menu branch) 34. . . . . . . . . 6,9,u,2,ch,10 Check Channel Activity (hidden menu branch) 34. . . .

5.6 Measurements 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7,9,u DIU–19S Measurements 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7,9,u,1 Voltage Measurements 35. . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.7 Statistics 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8,9,u DIU–19S Statistics 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.8 Testing 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9,9,u DIU–19S Testing 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

About This Document



This document describes how to control Data Unit CU 24020 locally, by using aService Terminal, and details the menus used in the unit. The document covers thefollowing topics:

� Service menu diagrams of the unit (Chapter 2).� Principles for controlling the unit (Chapter 3).� Description of the Service Terminal main menu (Chapter 4).� Unit menus (Chapter 5).

� How to get information about faults (Section 5.1).� How to set and read identifications (Section 5.2).� How to set temporary controls (Section 5.3).� How to set and modify unit and channel settings (Sections 5.4 and 5.5).� How to measure voltages in the unit (Section 5.6).� How to get information on statistics concerning the unit (Section 5.7).� How to conduct tests on the unit (Section 5.8).

Relation to Other DocumentsThe Product Description document describes the functional principles of the unit,and the Installation document provides instructions for connecting cables. TheOperation document shows how to bring the unit into use

The general operation principles of the Service Terminal are found in the Operat-ing Manual for Service Terminal TC 21700.



Service Menus


Chapter 2Service Menus

This chapter shows the service menu diagrams used in data unit. The diagramsconsist of rectangular boxes (representing Service Terminal displays), which arearranged in hierarchical fashion: the main menu is shown on the top left of thepage and the submenus proceed downwards and to the right of the main menu.



)*�

1 Cpu resets2 Channel frame losses

Page 5

Page 6

Pages 7–10

Page 11

Page 11

Page 11

0 Display all1 Deactivate all channels

3 Copy channel

1 Test default

2 Channel settings

7 Control timeout

Select Operation:1 Fault display2 Local alarm cancel3 Reset local cancel4 Identifications5 Controls (temporary)6 Settings (permanent)7 Measurements8 Statistics9 Testing

10 User privileges11 Miscellaneous

DIU–19S Measurements:1 Supply voltage

DIU–19S Identifications:

5 HW–unit ID6 Program ID7 Modify IDs

3 User manual

DIU–19S Controls:0 Display1 To normal state2 Interface controls4 Forced indications

DIU–19S Statistics:

DIU–19S Testing:

2 Channel test3 Deactivate channels

4 Default settings

4 A/D tests5 Memory tests

8 Read/Save all

4,9,u

5,9,u

6,9,u

5 Activate channel6 Deactivate channel

7,9,u

8,9,u

6 Memory operations7 Diagnostics

9,9,u

DIU–19S Settings:

4–9

in the rack)

m

m,9

uSelect unit number:(the place of the unit in

Select unit selection: 9

Select the main level:4...9

MAIN LEVEL MENU

For sub-level, goto

Abbreviations used in the menu paths:

addr = addressch = channelm = main leveln = numberts = time slotu = unit

Service Menus


4,9,u

DIU–19S Identifications:

5 HW–unit ID6 Program ID7 Modify IDs

3 User manual

0 – 99Give .–version: Give version:

3 characters

4,9,u,7 4,9,u,7,n

CS 24064.01 01A

4,9,u,6

CU 24020 03A

4,9,u,5

C33374002SE_0

4,9,u,3

IDENTIFICATIONS



5,9,u

0 Display1 To normal state2 Interface controls4 Forced indications

5,9,u,2

Interface controls: Give channel number1...4

5,9,u,4

5,9,u,2,ch

Interface controls: 0 Display1 To normal state2 Loop to interface3 Loop to eq. bus6 Test generator

Test generator: 1 Test pattern2 Tx/rx connection3 Tx connection 4 Rx connection

5,9,u,2,ch,6

Test pattern: 0 Display1 TxD = 02 TxD = 13 TxD = 1:14 TxD = PR511

5,9,u,2,ch,6,1

Tx/Rx connection: 0 Display1 Normal state2 To 2M dir. with V.1103 To 2M dir. without V.1104 To DTE dir.

Tx connection: 0 Display1 Normal state2 To 2M dir. with V.1103 To 2M dir. without V.1104 To DTE dir.

Rx connection: 0 Display1 Normal state2 To 2M dir. with V.1103 To 2M dir. without V.1104 To DTE dir.

Forced indications: 0 Display1 Normal indic.2 Forced red indic.3 Forced yellow indic.4 Forced no indic.

5,9,u,2,ch,6,2

5,9,u,2,ch,6,3

5,9,u,2,ch,6,4

DIU–19S Controls:

1...4ch

CONTROLS

Service Menus


6,9,u

0 Display all1

3 Copy channel2 Channel settings

Channel settings:

6 Deactivate channel5 Activate channel4 Default settings

7 Control timeout8 Read/save all

Give channel number1...4

6,9,u,2 6,9,u,2,ch

Channel settings:0 Display 1 V.28 interface type2 V.24 circuits3 Operating mode4 TS allocations5 Activate channel6 Deactivate channel

See

page 8

Copy channel settings:From channel1...4

Copy channel settings:To channel1...4

6,9,u,3 6,9,u,3,ch

Activate channelGive channel number1...4

6,9,u,5

Deactivate channelGive channel number1...4

6,9,u,6

Control time–out0 display1,...,65000 min.

6,9,u,7

Read/Save all:0 Display ID1 Read settings2 Save settings 1)

6,9,u,8

Deactivate all channels

Set defaults to1 Channels 1...22 Channels 3...4

6,9,u,4

DIU–19S Settings:

1...4ch

1...4ch

1...4ch

1...4ch

1...4ch

1) Press 2 INV DATA RET

SETTINGS



6,9,u,2,ch

Channel settings:0 Display1 V.28 interface type

3 Operating mode2 V.24 circuits

6 Deactivate channel5 Activate channel4 TS allocations

6,9,u,2,ch,2

V.24 circuits: 0 Display1 1052 1063 1074 1085 1096 Other

6,9,u,2,ch,2,1Circuit 105: 0 Display1 Normal (V.110)2 Not in use3 Use for transm. control

6,9,u,2,ch,2,2Circuit 106: 0 Display1 Normal (V.110)2 Forced OFF3 Forced ON4 Delayed

6,9,u,2,ch,2,3Circuit 107: 0 Display1 Normal (V.110)2 Forced OFF3 Forced ON

6,9,u,2,ch,2,4

6,9,u,2,ch,2,5Circuit 109: 0 Display1 Normal (V.110)2 Forced OFF3 Forced ON

6,2,n,2,6

Other circuits: 0 Display 1 1112 1163 1254 1405 1416 1427 TST2

Seepage 9

Circuit 108: 0 Display1 Normal (V.110)2 Not in use

6,9,u,2,ch,4

TS allocation: 0 Display1 Tx/Rx time slots2 Tx time slots only3 Rx time slots only

6,9,u,2,ch,4,1–3 6,9,u,2,ch,4,1–3, ts

Bit mask give bit maskB1...8

6,9,u,2,ch,2,6

select time slot:1...31 time slot

TS allocation

SETTINGS: Channel settings

V.28 interface type:0 Display

6,9,u,2,ch,1

1 Local

6,9,u,2,ch,3see page 10

6,9,u,2,ch,8–10 Hidden menu branches, see section 5.5

Service Menus


6,9,u,2,ch,2,6 6,9,u,2,ch,2,6,1

Other circuits: 0 Display 1 1112 1163 1254 1405 1416 1427 TST2

Circuit 111:0 Display

Circuit 116:0 Display

6,9,u,2,ch,2,6,2

Circuit 125:0 Display2 Forced OFF3 Forced ON

6,9,u,2,ch,2,6,3

Circuit 140 use forlocal loop:0 Display1 In use2 Not in use

6,9,u,2,ch,2,6,4

Circuit 141 use forlocal loop:0 Display1 In use 2 Not in use

6,9,u,2,ch,2,6,5

Circuit 142:0 Display2 Use for LL indicator3 Forced ON

6,9,u,2,ch,2,6,6

Circuit TST2:0 Display2 Forced OFF3 Forced ON

6,9,u,2,ch,2,6,7

SETTINGS: Other circuits than V.24



6,9,u,2,ch,3 6,9,u,2,ch,3,1 6,9,u,2,ch,3,1,1

Operating mode:0 Display1 Synchronous2 Asynchronous

Synchronous mode: 1 Data rate2 Tx timing3 Transfer mode

Data bit rate: 0 Display1 600 bit/s2 1200 bit/s3 2400 bit/s4 4800 bit/s5 9600 bit/s6 19200 bit/s7 48 kbit/s8 56 kbit/s9 64 kbit/s

6,9,u,2,ch,3,1,2

Tx timing: 0 Display1 1142 1133 115

6,9,u,2,ch,3,2 6,9,u,2,ch,3,2,1

6,9,u,2,ch,3,2,2

Asynchronous mode: 1 Data rate2 Character length3 Transfer mode

Data bit rate:0 Display1 600 bit/s2 1200 bit/s3 2400 bit/s4 4800 bit/s5 9600 bit/s6 19200 bit/s

Character length: 0 Display1 8 bits2 9 bits3 10 bits4 11 bits

SETTINGS: Operating mode

6,9,u,2,ch,3,1,3

Transfer mode:0 Display1 Duplex point–to–point2 Simplex tx3 Simplex rx4 Point–to–multipoint

6,9,u,2,ch,3,1,3Transfer mode:0 Display1 Duplex point–to–point2 Simplex tx3 Simplex rx4 Point–to–multipoint

Service Menus


7,9,u

1 +5 V2 –12 V

1 Test default2 Channel test3 Deactivate channels4 A/D tests5 Memory tests

9,9,u

8,9,u

1 Supply voltage

Voltage measurements: Supply voltage

0 Display voltage1 Display voltage (float)2 Calibration

Give measured supplyvoltage in mV

1 CPU resets2 Channel frame losses

CPU resets:0 Display1 Clear counter

Channel frame lossesgive channel number1...4

Channel testGive channel number1...4

Memory test:1 RAM

EPROM2EEPROM3

3 +12 V

(without sign.)

0 Display1 Clear detector

6 Memory operations7 Diagnostics

9,9,u,2

9,9,u,5

Memory operations:1 Read byte

Write byte in ram2Read 8 bytes3

9,9,u,6

7,9,u,1 7,9,u,1,n

7,9,u,1,n,2

8,9,u,1

8,9,u,2 8,9,u,2,ch

DIU–19S Measurements:

DIU–19S Statistics:

DIU–19S Testing:

+5V (–12 V, +12 V):

n1...3

ch1...4

Frame losses detection:

MEASUREMENTS

STATISTICS

TESTING

Write byte in eeprom4

9,9,u,6,1 or 2 or 3

Give memory address:0...65535

9,9,u,6,2,addr.

Give byte value:0...255

9,9,u,6,4

Give eeprom offset:0...511

9,9,u,6,4,offset




How to Control and Access the Unit with Service Terminal


Chapter 3How to Control and Access the Unit with ServiceTerminal

This chapter explains briefly the principle for controlling the unit with a ServiceTerminal. A more detailed description on the use of the Service Terminal isdescribed in the Operating Manual for Service Terminal TC 21700.

With the Service Terminal, you can assign the basic settings to the unit and storethem into a nonvolatile storage. You can also take maintenance-related measures,e.g. set loopbacks, and read e.g. identifications or statistics from the unit.

Control PrincipleThe equipment is controlled by choosing options on menus. You can also bypassintermediate menu levels by keying in several selections as one string, if you knowthe entire command string (e.g. 5,9,3,2,3 to loop back the outgoing 2048 kbit/s sig-nal of the 2M interface of the data unit; in this example we assume that the unit wasinstalled in unit location 3).

Within command strings, commas are used as command parameter delimiters, andthe command is executed with the RET key.

The Service Terminal keypad is shown in Figure 1.



��++

+�

��,

+�

��-

+�

��. �.

/,0. ?��

�� ,+ ��

� , +

��1

� � �

�,0

, . � ��

2,�+�3

��

� �

� � �

+

2�0

� ��

4

�(#(��5!&("��!�6�5+��#�57�8&#�*�50!��#5�#�"95��(#

�52(8(�5#!��#5��(#

Figure 1 Service Terminal keypad

Accessing the Data UnitSince the data unit is not provided with a service interface of its own, the ServiceTerminal functions must be directed to the unit via the main unit (DYNACARD-MUX) of the equipment. To access the data unit, select first the main level menu(4...9), then 9 separated by a comma, and finally the unit number u:

4...9,9,u�

The unit numbering starts from 1 on the left.

Service Terminal Main Menu


Chapter 4Service Terminal Main Menu

When the Service Terminal is switched on, it shifts into mode Equipment oper-ation/Select operation, which is the factory setting, and displays the main menucommon to all equipment:

Select Operation:1 Fault display2 Local alarm cancel3 Reset local cancel4 Identifications5 Controls (temporary)6 Settings (permanent)7 Measurements8 Statistics9 Testing10 User privileges11 Miscellaneous

1 Fault DisplayThe fault display indicates the fault situation of the equipment. The display shows:

� The equipment ID (e.g. DM 2 ABC)� The fault category (A, B, D, S, or a combination of these)� The supervision block indicating the fault� The fault type

2 Local Alarm CancelIn the event of a fault, Local alarm cancel cancels the rack alarms A and B. As areminder of cancellation, the equipment provides a D-alarm. Cancelling an alarmwithout a fault situation also produces a B-alarm. The Local alarm cancel con-cerns the entire equipment.



3 Reset Local CancelThe normal situation is restored.

4 IdentificationsUnder this item, you can read unit identification data, such as unit identificationand the type and version of the program used. Some of the identifications can alsobe modified.

5 Controls (temporary)Under this item, you can assign controls (e.g. interface loopbacks) that temporar-ily change the operating mode of the unit. The controls are lost e.g. in connectionwith reset.

6 Settings (permanent)Settings determine the operating mode of the unit. The settings are permanent andare therefore retained in the equipment memory even in the event of a power fail-ure. The special settings for GSM purposes are not, however, permanent.

7 MeasurementsUnder this item, you can start voltage measurements made by the unit itself (with-out external measuring instruments).

8 StatisticsReading and resetting of statistics gathered by the equipment itself.

9 TestingUser-activated tests performed by the unit itself.

10 User PrivilegesThis item covers the protective facilities of the equipment. Some of the unit func-tions (e.g. Settings) can be protected by setting a password, which must be knownif the protected functions are to be modified. The user privileges concern the entireequipment.

11 MiscellaneousThis item covers the functions not included in the other categories (not yet in use).

Data Unit Menus


Chapter 5Data Unit Menus

The data unit is controlled via the service interface of the main unit (DYNA-CARD–MUX). The main unit provides the menus related to the common sectionof the equipment and the menus for accessing the target unit. The data unit pro-vides the menus required for its own control.

5.1 Fault DisplayThe main unit collects fault data from the other units into a common fault storage.At initialization, the main unit collects from each unit the following data: the faultsin the unit, their effect on the alarm outputs, the fault code related to each fault,how the fault is indicated (colour of indicator), and name of the supervision block.The main unit generates the response shown in the fault display; the response con-tains the following information:

� Equipment ID (equipment name)� Fault status� Fault data:

� Fault object� Fault type (fault code)

Example:

*DM ABC (AS)DM2/1 (unit 1)– frame alignment lostDIU 19S (unit 3)– synchronizing fault

In the above example, the equipment, named DM 2 ABC, has alarms A and S. Thefault indications are received from the supervision block of equipment interface 1(unit 1), where the fault is loss of frame alignment, and from the supervision blockof the data unit (unit 3), where the fault is loss of V.110 frame synchronization.



Table 1 lists the types of fault supervised in the DIU 19S.

Fault code

Dec Hex

Fault message Fault

020 14 Blocked from use Queuing for activation

021 15 Loop to interface Loop to interface

022 16 Loop to equipment Loop to equipment bus

023 17 Test mode Test generator on

061 3D No incoming line signal Fault code reserved, but not in use

096 60 BER alarm Bit error rate alarm of test generator(also checked in simplex Tx mode)

122 7A Synchronizing fault V.110 frame synchronization fault (notchecked in simplex Rx mode)

130 82 Memory fault Memory fault

142 8E Installation error Fault code reserved, but not in use

148 94 Equipment reset Unit reset in progress

149 95 Forced indication Forced indication of LEDs

159 9F Run diagnostic tests Miscellaneous faults

Table 1 Faults supervised in DIU 19S

Data Unit Menus


5.2 Identifications

4,9,u DIU-19S Identifications

DIU–19S Identifications:3 User manual5 HW–unit ID6 Program ID7 Modify IDs

In the menu, options 3...6 display the unit identifications, which can be modifiedvia option 7.

4,9,u,3 User ManualThe document number of the Service Menu Reference document related to theprogram; fixed. Response example:

C33374002SE_0

4,9,u,5 HW-unit IDProduct code and version of the unit. Set at factory, but changeable e.g. in connec-tion with repair. Response example:

CU 24020 03A

4,9,u,6 Program IDProduct code and version of the program; fixed. Response example:

CS 24064.01 01A



5.3 Controls

5,9,u DIU-19S Controls

DIU 19S Controls:0 Display controls1 To normal state2 Interface controls4 Forced indications

5,9,u,0 Display ControlsThis selection displays the interface-specific controls of the unit. Responseexample:

Display ctrl & status type controls statusIF1: Loc. – – PR511 AIF2: Loc. L1 – 1:1 AIF3: Loc. – – Txd = 1 AIF4: Loc. – – – nA

The interface-specific controls are:

� Interface type� defines the electrical matching of the interface.

Loc. = Local V.24/V.28 interface

� Controls� indicates the temporary loops set at the interface:

L1 = loop 1 to interfaceL2 = loop 2 to equipment bus

� indicates the temporary test data pattern to the interface:PR511 = ITU-T V.52–compliant test sequence PR5111:1 = data pattern with alternating ‘‘1”s and ‘‘0”sTxD=0 = permanent ‘‘0”-stateTxD=1 = permanent ‘‘1”-state

� Status� indicates the channel status:

A = activatednA = not activatedQA = queuing for activationrA = queuing for deactivation

5,9,u,1 To Normal StateThe selection forces all unit controls to normal state.

Data Unit Menus


5,9,u,2 Interface ControlsThe program prompts for the number of the data interface and then displays themenu:

Interface controls:0 Display1 To normal state2 Loop to interface3 Loop to eq. bus6 Test generator

Selection 0 displays the state of the interface.

Selection � sets the interface to normal state.

Selection 2 connects the signals received from the interface back to the output ofthe same interface (loop L1). The loopback is selectable only for channels that arein use; the time slots and bit masks must be the same in the receive and transmitdirections. When this option is selected, the program generates a fault messageconcerning the loopback.

Selection 3 connects the signals received from the 2 Mbit/s frame back to theframe (loop L2). A fault message concerning the loopback is given. The L2 loopcannot be set on when the data rate is 64 kbit/s.

5,9,u,2,ch,6 Test Generator

Test generator:1 Test pattern2 Tx/Rx connection3 Tx connection4 Rx connection

5,9,u,2,ch,6,1 Test Pattern

Test pattern:0 Display1 TxD = 02 TxD = 13 TxD = 1:14 TxD = PR511

Selection 0 displays the test data pattern currently in use.

Selections 1 and 2 control the transmitted data into a selected state.

Selection 3 sets the transmitted data as alternating zeros and ones, whereas selec-tion � sets it to comply with test pattern PR511.



5,9,u,2,ch,6,2–4 Tx/Rx ConnectionTest generator options 2, 3 and 4 control the directions of the received and trans-mitted data flow. The selection is made in the following menu:

Tx/Rx connection:0 Display1 Normal state2 To 2M dir. with V.1103 To 2M dir. without V.1104 To DTE direction

Selection 0 displays the current status of the connection.

Selection 1 controls the connection to normal state.

Selection 2 connects the data to the direction of the 2M bus and adds the V.110frame to the data.

Selection 3 connects the data to the direction of the 2M bus, but does not add theV.110 frame to the data (only when the data rate is 64 kbit/s).

Selection 4 connects the data to the DTE direction.

Data Unit Menus


5.4 Settings

6,9,u DIU-19S SettingsThe main menu for the data unit settings is the following:

DIU–19S Settings:0 Display1 Deactivate all channels2 Channel settings3 Copy channel4 Default settings5 Activate channel6 Deactivate channel7 Control time-out8 Read/Save all

6,9,u,0 Display All InterfacesSelection 6,9,u,0 displays the interface-specific settings for each channel.Response example:

Display all interfaces: type rate mode TS/B1...8 statusIF1: Loc. 4800 Syn. TS31/10000000 nAIF2: Loc. 4800 Syn. TS31/01000000 nAIF3: Loc. 9600 Syn. TS31/00110000 nAIF4: Loc. 19200 Syn. TS31/00001111 nA

The interface-specific settings are:

� Interface type� Defines the electrical matching of the interface

Loc. = Local V.24/V.28 interface

� Rate� Indicates the baud rate of the Data Terminal Equipment

� Mode� Indicates the operating mode of the interface:

Syn = synchronous interfaceAsy = asynchronous interface

� Time slot settings and bit position allocations (TS/B1...8)� Define the bits allocated to the channel in the 2M frame



� Channel status� Defines the channel connection to the 2M frame structure� The channel status is indicated by the following abbreviations:

Activated ANot activated nAQueuing for activation QAQueuing for deactivation rA

While the channel is queuing, the main unit receives a fault message on this.

� If the operating mode selected for the channel is simplex, the displayed statusinformation will be:�4@A ��4% �� 4@A@��4% ��'�

� If the operating mode of the channel is point-to-multipoint, the statusinformation displayed will be:MP = point-to-multipoint connection

Note Even if simplex and point-to-multipoint operating modes can beselected, these are not supported.

6,9,u,1 Deactivate ChannelsSelection 6,9,u,1 sets all channels into a deactivated state. None of the channels isconnected to the 2M bus.

6,9,u,2 Channel SettingsYou can access the channel-specific settings through selection 6,9,u,2. The chan-nel settings are described in further detail in section 5.5, Channel settings.

6,9,u,3 Copy ChannelSelection 6,9,u,3 reads the channel settings from a channel and saves them toanother.

6,9,u,4 Default SettingsSelection 6,9,u,4 sets on the default settings for the channels. The default settingsfor Data Unit CU 24020 are listed in Table 2.

Data Unit Menus


Setting Default value

Interface type Local V.28

Operating Mode Synchronous

Transfer mode Duplex point-to-point

Tx timing 115

Channel settings forIF1:IF2:IF3:IF4:

Rate Bit mask (Rx/Tx)4800 100000004800 010000009600 0011000019200 00001111

Time slot (Rx/Tx) 31

Status Not active

V.24 circuits:105106107108109125140141142TST2

Normal (V.110)Normal (V.110)Normal (V.110)Normal (V.110)Normal (V.110)Forced OFFNot in useNot in useUse for LL indicatorForced OFF

Table 2 Default settings for the channels

6,9,u,5 Activate ChannelSelection 6,9,u,5 connects the channel selected to the 2M bus. The activation pro-cess checks that the interface and channel settings are correct.

6,9,u,6 Deactivate ChannelSelection 6,9,u,6 deactivates the channel selected.

6,9,u,7 Control Time-outThe selection defines the time for the controls to remain valid without beingrefreshed. The factory setting is 10 min.

Control time–out:0 Display1,...,65000min.



6,9,u,8 Read/Save AllThis facility is useful when units are changed.

Read/Save all:0 Display ID1 Read settings2 Save settings

Selection 0 displays the program ID.

Selection 1 reads the unit settings e.g. when units are changed.

Selection 2 saves the previously read settings to a new unit.(Press: 2INV, DATA, RET)

5.5 Channel Settings

6,9,u,2,ch Channel Settings (ch = channel)

Channel settings:0 Display1 V.28 interface type2 V.24 circuits3 Operating mode4 TS allocations5 Activate channel6 Deactivate channel

6,9,u,2,ch,0 DisplayThe selection displays the current interface-specific settings. An example:

Display interface 1: type rate mode TS/B1...8 statusIF1: Loc. 2400 Syn. TS31/10000000 nA

6,9,u,2,ch,1 V.28 Interface Type

V.28 interface type:0 Display1 Local

Selection 0 displays the current V.28 interface type. The basic interface type(option 1) complies for its electrical specifications with ITU-T RecommendationV.24/V.28.

Data Unit Menus


6,9,u,2,ch,2 V.24 Circuits

V.24 circuits:0 Display1 1052 1063 1074 1085 1096 Other

Selection 0 displays the following response:

IF1 V.24 Circuits:105 106 107 108 109 off off off off off

6,9,u,2,ch,2,1 Circuit 105

Circuit 105:0 Display1 Normal (V.110)2 Not in use3 Use for transm. control

Selection 0 in this menu displays the current use of the circuit.

Selection 1 sets the use of the circuit to comply with Recommendation V.110.

Selection 2 sets the circuit out of use (Forced ON).

Selection 3 sets circuit 105 to be used for transmitter control. The ON state of cir-cuit 105 connects the transmitter of the interface to the transmission channel.

6,9,u,2,ch,2,2 Circuit 106

Circuit 106:0 Display1 Normal (V.110)2 Forced OFF3 Forced ON

Selection 0 displays the current use of the circuit.

Selection 1 sets the use of the circuit to comply with ITU-T RecommendationV.110.

Selection 2 sets the circuit permanently OFF.

Selection 3 sets the circuit permanently ON.



6,9,u,2,ch,2,3 Circuit 107



Selection 1 sets the use of the circuit to comply with ITU-T RecommendationV.110.

Selection 2 sets the circuit permanently OFF.

Selection 3 sets the circuit permanently ON.

6,9,u,2,ch,2,4 Circuit 108

Circuit 108:0 Display1 Normal (V.110)2 Not in use

Circuit 108 is used to connect the interface to the transmission channel.


Selection 1 sets the use of the circuit to comply with ITU-T RecommendationV.110. The ON state of the circuit connects the interface to the transmission chan-nel.

Selection 2 sets the circuit out of use (Forced ON). The interface is then perma-nently connected to the transmission channel.

6,9,u,2,ch,2,5 Circuit 109


�� 0 ��&� ��

�� 1 �� & ��

�� 2 �� & 3$$�

�� 3 �� & 3!�

Data Unit Menus


6,9,u,2,ch,2,6 Other Circuits

Other circuits:0 Display1 1112 1163 1254 1405 1416 1427 TST2

Selection 0 displays the states of the circuits. An example:

IF1 Other circuits:111 116 125 140 141 142 TST2 off off off off off off off

The states of incoming circuits 111 and 116 can be read by selections 1 and 2,respectively.

The states of outgoing circuits 125 and TST2 can be forced by selections 3 and 7,respectively.

Test signals 140 and 141 can be used to control the local loop.

6,9,u,2,ch,2,6,4 Circuit 140 Use for Local LoopThe control menu for circuit 140 is the following:

Circuit 140 use for local loop:0 Display1 In use2 Not in use

Selection 0 displays whether the circuit is used to control the local loop.

Selection 1 sets the circuit to control the local loop.

Selection 2 sets the circuit out of use.

6,9,u,2,ch,2,6,5 Circuit 141 Use for Local Loop

Circuit 141 use for local loop:0 Display1 In use2 Not in use

Selection 0 displays whether the circuit is used to control the local loop.

Selection 1 sets the circuit to control the local loop.

Selection 2 sets the circuit out of use.



6,9,u,2,ch,2,6,6 Circuit 142The control menu for the test indicator, circuit 142, is the following:

Circuit 142:0 Display2 Use for LL indicator3 Forced ON

Selection 0 displays whether the circuit 142 is used for local loop indication.

Selection 2 sets the circuit to indicate the local loop.

Selection 3 sets the circuit to ON state.

6,9,u,2,ch,3 Operating ModeThe operating mode of the interface can be either synchronous or asynchronous.The operating mode will change first after the data rate has been selected.

Operating mode:0 Display1 Synchronous2 Asynchronous

6,9,u,2,ch,3,1 Synchronous Mode

Synchronous mode:1 Data rate2 Tx timing3 Transfer mode

6,9,u,2,ch,3,1,1 Data Bit Rate for Synchronous Mode

Data bit rate:0 Display1 600 bit/s2 1200 bit/s3 2400 bit/s4 4800 bit/s5 9600 bit/s6 19200 bit/s7 48 kbit/s8 56 kbit/s9 64 kbit/s

Selection 0 displays the selected data bit rate.

By selections 1 – 8, the data bit rate selected is adapted to the transmission channelas specified in ITU-T Recommendation V.110.

Data Unit Menus


Selection 9 sets the adaptation of 64 kbit/s to the transmission channel to be donetransparently.

6,9,u,2,ch,3,1,2 Tx Timing

Tx timing:0 Display1 1142 1133 115

Note that circuit 115 is looped back as circuit 113 at the far-end modem or ter-minal. The use of network-independent clock is not supported. (Use of circuit 113is available from hardware version CU 24020 02A on).

Selection 0 displays the Tx timing circuit.

Selection 1 sets circuit 114 for Tx timing.

Selection 2 sets circuit 113 for Tx timing. This selection is not available when thedata bit rate 64 kbit/s is used.

Selection 3 sets circuit 115 for Tx timing. This selection is not available when thedata bit rate 64 kbit/s is used.

6,9,u,2,ch,3,1,3 Transfer Mode

Transfer mode:0 Display1 Duplex point-to-point2 Simplex tx3 Simplex rx4 Point-to-multipoint

Selection 0 displays the transfer mode currently in use.

Selection 1 sets the transfer mode as duplex point–to–point.

Note Even if simplex and point-to-multipoint operation modes can beselected, these are not supported.



6,9,u,2,ch,3,2 Asynchronous Mode

Asynchronous mode:1 Data rate2 Character length3 Transfer mode

6,9,u,2,ch,3,2,1 Data Bit Rate for Asynchronous Mode

Data bit rate:0 Display1 600 bit/s2 1200 bit/s3 2400 bit/s4 4800 bit/s5 9600 bit/s6 19200 bit/s

Selection 0 displays the data bit rate.

By selections 1 – 6 the data bit rate selected is adapted to the transmission channelas specified in ITU-T Recommendation V.110.

When you want to transmit asynchronous data using a bit rate lower than 600 bit/s,set the operating mode to synchronous transfer with 4800 bit/s data bit rate. Thetransmission is then performed on sampling principle.

6,9,u,2,ch,3,2,2 Character Length for Asynchronous ModeThe character length includes the data bits, the start bit, the stop bit and the paritybit, if one is used.

Character length:0 Display1 8 bits2 9 bits3 10 bits4 11 bits

Selection 0 displays the selected character length.

Selections 1 – 4 set the character length to 8–11 bits, respectively.

Data Unit Menus


6,9,u,2,ch,3,2,3 Transfer Mode for Asynchronous Mode

Transfer mode:0 Display1 Duplex point-to-point2 Simplex tx3 Simplex rx4 Point-to-multipoint

Selection of transfer mode is done in the same way in the asynchronous mode andin the synchronous mode.

6,9,u,2,ch,4 Time Slot AllocationsThe time slot is selectable in the range 1 to 31.

TS allocation:0 Display1 Tx/Rx time slots2 Tx time slots only3 Rx time slots only

Selection 0 displays the time slots used by the channel.

Selection 1 sets the same time slot for the transmit and receive direction.

Selection 2 sets the time slot for the transmit direction only.

Selection 3 sets the time slot for the receive direction only.

After the time slot selection, a bit mask is required for the time slot selected.

Bit mask:give bit maskB1...8

You can write 1, 2, 4, or 8 ones (1) in the bit mask, depending on the transfer capac-ity required by the channel.

An example: B1...B8 10000000.

Bit B1 is selected from the specified time slot.

6,9,u,2,ch,5 Activate ChannelThe selection connects the channel selected to the 2M bus. The activation processchecks that the channel settings are correct.

6,9,u,2,ch,6 Deactivate ChannelThe selection deactivates the channel selected.



6,9,u,2,ch,8,mode,bit rate,char len,bitmask,time slotSet Channel Settings (hidden menu branch)Note These settings are not permanent. The settings are saved only onto the

RAM, not on the EEPROM.

The selection sets the channel-specific settings for the unit and activates the chan-nel selected.The settings are interpreted as follows:

� Mode:1 Synchronous2 Asynchronous

� Bit rate:1 6002 12003 24004 48005 96006 19200

� Char len (Asynchronous character length):1 9 bits2 10 bits3 11 bits

� Bitmask (1–255) examples:1 B1–B8: 0000 0001128 B1–B8: 1000 0000255 B1–B8: 1111 1111

� Time slot:1–31 time slot

6,9,u,2,ch,9 Deactivate Channel (hidden menu branch)Note This setting is not permanent. The setting is saved only onto the RAM,

not on the EEPROM.

The selection deactivates the channel selected.

6,9,u,2,ch,10 Check Channel Activity (hidden menu branch)The selection checks the actual activation status. It responds by Done, if the chan-nel is activated, and by Functional error, if the channel is not activated, queuing foractivation, or queuing for deactivation. The returned terminator for Done is CR(Carriage return) and the exception terminator for the Functional error is #.

Data Unit Menus


5.6 Measurements

7,9,u DIU–19S Measurements

DIU–19S Measurements:1 Supply voltage

7,9,u,1 Voltage Measurements

Voltage measurements:1 +5 V2 –12 V3 +12 V

Supply voltage +5 V (–12 V, +12 V):0 Display voltage1 Display voltage (float)2 Calibration

Selections 0 and 1 display the measured +5 V, –12 V or +12 V supply voltage.Selection 2 calibrates the voltage measurement.

Give measured supplyvoltage in mV(without sign)



5.7 Statistics

8,9,u DIU–19S Statistics

DIU–19S Statistics:1 CPU counter2 Channel frame losses

Selection 8,9,u,1 displays the menu:

CPU resets:0 Display1 Clear counter

�� 0 � �� &� �� (�� <B� �� '�� the previous reset.

Selection 1 resets the counter.

Selection 8,9,u,2,ch displays the following menu:

Frame losses detection:0 Display1 Clear detector

Selection 0 in this menu shows whether a frame loss has occurred since the previ-ous reset. Selection 1 resets the detector.

Data Unit Menus


5.8 Testing

9,9,u DIU–19S Testing

DIU–19S Testing:1 Test defaults2 Channel test3 Deactivate channel4 A/D-tests5 Memory tests6 Memory operations7 Diagnostics

Selection 1 sets the default settings for the test.

Default settings: type rate mode TS/B1...8 statusIF1: Loc. 4800 Syn. TS31/10000000 nAIF2: Loc. 4800 Syn. TS31/01000000 nAIF3: Loc. 9600 Syn. TS31/00110000 nAIF4: Loc. 19200 Syn. TS31/00001111 nA

Selection 2 tests the channel selected at all transmission rates and operatingmodes. The response obtained should be channel ok. In the event of a fault, theresponse is channel failed.

Selection 3 deactivates all channels.

Selection 4 tests the A/D converter.

The memory tests (selection 5) are used to locate a possible fault in the RAM,EPROM (or EEPROM). The EEPROM test takes about 10 minutes; during thistime the unit cannot receive any commands.

Memory operations (selection 6) allow you to read from and save to a specifiedmemory location. The program displays a menu where you can choose from fourmemory operations:

Memory operations:1 Read byte2 Write byte in ram3 Read 8 bytes4 Write byte in eeprom

After selections 1, 2 and 3 (9,9,u,6,1 or 2 or 3) the program will prompt you tochoose the memory address:

Give memory address:0...65535



If you chose the write option (selection 9,9,u,6,2), the program will prompt you toenter the byte value:


After selection 4 (9,9,u,6,4) the program will prompt you to enter the EEPROMoffset:

Give eeprom offset:0...511

The program will then prompt you to enter the byte value:


Selection 7 (9,9,u,7) displays the fault detected in the course of a diagnostic test.