BT 2+8 Скачать руководство пользователя страница 39

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Published by British Telecom Technical
Publications.

All possible care has been taken in the

preparation of this publication, but British

Telecommunications plc accepts no liability
for any inaccuracies that may be found.

British Telecommunications plc's policy is

one of continuous improvement and it may
make changes without notice both to this

publication and to the product which it

describes.

British Telecommunications plc

1991

Please do not reproduce, transmit, transcribe,
store in a retrieval system, or translate into
any human or computer language, any part of

this publication without the prior permission
of British Telecommunications plc, as to do so

would be an infringement of copyright

British Telecom

is a registered trademark of

British Telecommunications plc.

Содержание 2+8

Страница 1: ...Installation and maintenance manual 2 8...

Страница 2: ......

Страница 3: ...2 1 11 External extensions 2 1 12 Earthing 2 1 13 Setting the CCU DIL switches 2 1 14 Line voltage feed 2 1 15 Answering machines with Systemphones 3 1 Subsidiary connection piggy backing 4 1 Safety p...

Страница 4: ...one P T switch location Fig 2 4 CCU Internal view Fig 2 5 DIL switches Fig 2 6 Setting the line voltage feed links Fig 2 7 Connections for an answering machine Fig 7 1 Faulting flowchart List of table...

Страница 5: ...ed by the system Break jacks are provided on the exchange line IDCs i i 2 Systemphone The 2 8 Systemphone is exclusive to the 2 8 system having full LSr operation direct selection and display status o...

Страница 6: ...Introduction Figure 1 1 Typical 2 8 system Mains supply 4 2 8 ccu Exchange line s Systemphone extension Telephone extension LJU2 1A External extension LJU2 1A Surge protection 1 2 TPU 1371Issue3 4 91...

Страница 7: ...hange line 1 will ring extension 20 and any other extension which has its ringer programmed on It is also the power fail extension for line 1 Incoming calls on exchange line 2 will ring extension 21 a...

Страница 8: ...ch on when in Keysystem Mode the CCU sets all extensions to ring if an incoming call arrives Individual extensions can be prevented from ringing by programming them off The ringer default on is a mand...

Страница 9: ...PCB or any other components are liable to be handled then the following precaution should be taken Wrist straps Before handling printed circuit boards or components a wrist strap must be worn and conn...

Страница 10: ...ion such as heavy electrical switch gear for example lift machinery or electric arc welders should be specifically avoided Allow at least lOOmm of free space all round the CCU for ventilation purposes...

Страница 11: ...can be slid out from under the screw heads 2 Loosen the CCU top cover transit retaining screws and lift to remove the cover completly 3 Remove the top cover metal transit retaining screws and replace...

Страница 12: ...nt if you need to re terminate the mains plug for maintenance purposes Terminate the mains lead with a 13A plug approved to the requirements ofBS1363 and the Statutory Instrument 1987 No 603 Consumer...

Страница 13: ...ide The Systemphone uses Pulse or TouchTone signalling The selector switch which is of the rotary type is located under the Systemphone as shown in Figure 2 3 Use a small screwdriver to alter the sett...

Страница 14: ...ment details the separation requirements between telecommunications cables and cables carrying mains supply voltages Generally the route chosen must be such that Telecoms cables must not be drawn into...

Страница 15: ...cation Pass the cable through the cable entry hole in the CCU and terminate the extension wiring in accordance with the following table Table 2 1 CCU to Master Jack Extension wiring 2 1 8 1 CCU Extens...

Страница 16: ...B C3I l 51 B 10LK24V Line 2 c i 24 SOV line feed links 9LK24V line 1 a 11 Exch ng line IDC terminations 1 a s i5lt 3J a i s a a BIS __ O _ J Entry point for ell and Mains interference suppression Mai...

Страница 17: ...confines of the customer s premises and the system s operational limits See Section 10 1 Statutory information Care should be taken when selecting external cable routes to ensure that the cabling com...

Страница 18: ...ed the functional earth wire into the CCU and terminate securely on the functional earth terminal see Figure 2 4 provided on the CCU PCB CAUTION Do not use excessive force when tightening this screw 2...

Страница 19: ...2 Recall PABX Down Down ELR Keysystem Down Up TBR 600ms TBR 250ms Exclusive line Up Down TBR95mms Exchange lines SS Ring bridge One exchange line only Up Short Bothexchange lines equipped Down Long No...

Страница 20: ...ll 600 milliseconds Set S3 or S4 in accordance with the Recall table in Figure 2 5 The 95 millisecond setting must be used in the UK The remaining options are provided for use only in other countries...

Страница 21: ...switch bank 2 1 13 3 Switch bank SW3 Call barring line 1 This switch bank consists of eight switches numbered from Sl to SS which correspond to extensions 20 to 27 respectively Set the switch up if th...

Страница 22: ...hones The series method of connecting telephones to answering machines such as the BT Kingfisher and Wren does not allow the continuation of all five wires from the extension socket to a 2 8 Systempho...

Страница 23: ...ure 2 7 Connections for an answering machine TPU 1371Issue3 4 91 2 8 Systemphone Leave telephone socket empty _L_ 1 I V Answering machine LJU10 3A doubler Installationprocedures Wall socket LJU 2 1A 2...

Страница 24: ...change line port of the 2 8 The connection details are the same as those given in paragraph 2 1 9 for the exchange line except that for Exchange line read Host PABX It will be necessary to select the...

Страница 25: ...a Systemphone connected The CCU cover has been replaced Switch on the mains power and allow at least 15 seconds for the CCU to go through its power up routine At first the Systemphone LEDs will all li...

Страница 26: ...as follows Night service on off Ringer on off Speak on off Programming instructions for all system features are given in the 2 8 Systemphone and Extension telephone user s guides Following a power fai...

Страница 27: ...ank SWl Also ensure that all switches in all four banks are set as required see Section 2 1 13 Setting the CCUD Lswitches 4 Replace the CCU cover and follow the instructions in Section 4 1 Safety prec...

Страница 28: ...switches in all four switch banks are set as required see Section 2 1 13 Setting the CCUD Lswitches 4 Replace CCU cover and follow the instructions in Section 4 1 Safety precautions and switch on 5 Ch...

Страница 29: ...and telephones are set as required 3 Set switch 8 to the up position in the configuration Switch bank SWl Also ensure that all switches in all four banks are set as required see Section 2 1 13 Settin...

Страница 30: ...at the time the system stops working The 2 8 has designed in mains interference suppression line surge protection and electrostatic discharge immunity However it is not possible to protect the system...

Страница 31: ...et system I o k I yes no I yes I Check mains supply to CCU I yes o k no I Check fuses in mains plug and CCU I o k I I no I Change CCU no I Does the fault effect all extensions I no I Change telephone...

Страница 32: ...one 425Hz 11 11 1 26 Sec ON 0 18 Sec OFF Warn tone 425Hz II II 1 08 Sec ON then OFF Confirmation tone 425Hz 0 18 Sec ON 0 18 OFF 0 18 Sec ON 0 18 OFF 0 18 Sec ON 0 54 OFF Number unobtainable 440Hz Con...

Страница 33: ...n 23 4th Extension 24 5th Extension 25 6th Extension 26 7th Extension 27 8th Extension 30 Extension reset 40 Ring back when free 41 Exchange line 1 42 Exchange line 2 5 Call Park 61 Ringer on line por...

Страница 34: ...nes of the customer s premises and that the distance of the extension instrument from the 2 8 Control Unit does not exceed the followng limits when using 0 5mm 2 copper conductor 150m for 2 8 Systemph...

Страница 35: ...n resistance of the functional earth is 50 n The current feed from the extension ports is in the range of 22 to 28ma The best overall performance of the system will be obtained by using approved exten...

Страница 36: ...Notes 10 2 Notes 10 3 TPU 1371Issue3 4 91...

Страница 37: ...Notes TPU 1371Issue3 4 91 10 4...

Страница 38: ...Notes 10 5 TPU 1371 Issue 3 4 91...

Страница 39: ...vement and it may make changeswithout notice both to this publication and to the product which it describes O British Telecommunications plc 1991 Please do not reproduce transmit transcribe store in a...

Страница 40: ...d may be modified from time to time Services and equipment are provided subject to British Telecommunications pie s respective standard conditions of contract Nothing in this publication forms any par...

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