UNLISTED
SYSTEMS
AEI
ATEA
ATM
AVAYA INDEX
BT, PO
& GPO SYSTEMS
ERICSSON - British Ericsson
ERICSSON
- Swedish Ericsson
GEC
GOLDSTAR
SYSTEMS
GPO SYSTEMS
GPT
SYSTEMS
IBM SYSTEMS
LONDON
SYSTEMS
LORIMER
MDS OPERA SYSTEMS
MITEL
SYSTEMS
OLYCOM
OMNICOM
PABX
- GPO MECHANICAL AND "ELECTRONIC" SYSTEMS MAINTAINED PRIOR TO 1981
PHILIPS
PANASONIC
PEEL CONNER
PLESSEY
SYSTEMS
PMBX
- GPO AND POST OFFICE MANUAL SWITCHBOARDS
POST OFFICE SYSTEMS
RELAY AUTOMATIC TELEPHONE COMPANY (RAT)
RHAPSODY SYSTEM
- FERRANTI
SDX
SYSTEMS
SIEMENS
SYSTEMS
SIEMENS
BROTHERS SYSTEMS
STC
SYSTEMS
TELEPHONE RENTALS
TIE
SYSTEMS