TELEPHONE INFORMATION | |||||||
| British PO telephone diagrams are all within the N diagram range. To find the right diagram
for a telephone add 100 to the telephone model number. e.g. telephone 746 is N diagram
846. Wall telephones are always an odd number and table types even numbers. PST telephones are prefixed with 8 and all phones in this range have high impedance bells/tone callers. e.g. high impedance telephone 746 is N diagram 8746 SR OR TSR STANDS FOR TELEPHONE SPECIAL RANGE AND THE MODEL NUMBERS HAVE THE FOLLOWING SUFFIXES A - NON PBX TELE WITH BUILT IN CALLING DEVICE B - NON PBX TELE WITHOUT A CALLING DEVICE C - PBX TELE WITH BUILT IN CALLING DEVICE D - PBX TELE WITHOUT A CALLING DEVICE G - MF OTHER TELEPHONE SUFFIXES R - EARTH RECALL RR - REGISTER RECALL (TIMED BREAK) AR - ALTERNATIVE RECALL (BOTH EARTH AND TIMED BREAK) OTHER INFO PST - PLUG AND SOCKET TELEPHONE SC - SELF CONTAINED PB - PRESS BUTTON TBR - TIME BREAK RECALL LNR - LAST NUMBER REDIAL
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Last revised: January 28, 2023FM |