|PXML No 53 AND 73
Time and Date
The Emblem or Merlin S2616 is a modular designed wall mounted central
cabinet which connects to an external Box Connection. System phones are:- Standard Terminal 2616S
Standard with loud speech 2616LS (TX24) and Executive Display Terminal 2616E (TX26).
Introduced by BT in 1984.
Maximum capacity of 6 exchange lines and 16
Power consumption 80 Watts.
Extension numbering is 10 to 25
(Extn 10 is used for programming).
Made by:- Nitsuko (Japan) and marketed in UK by Plessey Network and Office Systems Ltd (as the PKS616
PKS telephones generally have RJ11 plug ended leads.
Emblem was withdrawn from BT's Portfolio with effect from 31 March 1988.
Approved for direct connection to the PSTN (loop disconnect or MF signalling) or by
working to a (List A) subsidiary system (loop disconnect or MF signalling) connected to a
(list C) PBX.
The system supports Earth Loop or Time Break Recall.
The following software levels are approved for use with Emblem. The software is installed
on five Eproms on the processor Board and can be identified as follows:-
616.x13 616.x20 6l6.x28 616.x35 6l6.x42
SOFTWARE SERIES 7/16371 7/16371 7/16371 7/16371 7/16371
421/EE/16382/DO1 /009 /001 /002 /003 /004
/002 /009 /O11 /012 /003 /013
/003 /009 /018 /012 /003 /019
/004 /009 /018 /020 /003 /019
/005 /009 /018 /021 /003 /019
Emblem was approved for MF4 working to the PSTN using Series 2 processor software in 1987.
Nearly 2,000 of the earlier systems purchased by BT were fitted with Series 1 software.
For correct timed break recall working Series 5 processor software is required.
When MF4 signalling to the PSTN is to be provided on systems with series 1 software, the
processor card must be updated to Series 5 software. Systems with series 2, 3 and 4
software that require timed break recall working (to host PBX or BT network) for
additional facilities e.g. some Star Services, should also be updated to series 5
|| Speech +
|| Speech -
|| Data +
|| Data -
To load default data:-
- Set switch WR on the MCCU6PA card to the left hand side
- Turn on power at mains plug
- Turn on power at Power Unit
- Check that 5v and 24v LED's are lit
- After 5 seconds move the WR switch to the right hand position
Normal MCCU6PA switch positions (left being away from the LED's):
Line - Extension
1 - 10
2 - 13
3 - 16
4 - 18
5 - 21
6 - 24
- PCB's ARE ONLY REMOVED WITH POWER OFF
- Executive & Standard with loud speech are fully
- Standard without loud speech are polarity conscious
on data but only on speech when using handset.
- Does not support any type of 2 wire POT phones.
HANDSFREE MICROPHONES FAULTY (July 1994)
There have been several complaints of repaired Emblem S2616S (Standard) terminal microphones not working.
There is a little known facility that enables Standard terminal users intercom calls to auto answer in handsfree mode, thus switching on the terminals microphone. This microphone will not work on handsfree for outgoing intercom or exchange line calls.