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The Post Office provided switching networks (telephone and telegraph
systems) and supplied instruments to work on those networks.
They also managed, maintained and provided other services, many of which
were aligned to Government departments, private networks and ad-hoc
telephony services.
This section just advises of what these were but does not go into any
great detail and is definitely not a complete list.
Private Communication Services - List of
services
ACD Systems
Audio
Tele-conferencing
Blind Operators
Centralised Dictation facilities
Confraphone
Datel
Circuits and Equipment
Datelplex Service 110
Exchange Telegraph Company Ltd (EXTEL)
connectivity
Fire
Alarm Systems (Street type)
Firemen's Remote Control Callout Systems
Hospital Programme Networks
Inter-PBX signalling - AC15A
Midnight Line Service
Motorway Communication System
Multi-Terminal series connected DC circuits (Burglar alarm circuits)
Music
by Wire
Omnibus Speech-band private circuits
Orator - Conference Facility
Point
to Point DC circuits
Police and Ambulance Street Network
Prison to Police circuits
Program sound circuits
Radiophone
Radio
Paging
Sound
circuits for broadcasting authorities
Speech Broadcast Suites
Speechband Private Circuits
Subscriber Controlled Transfer
Telespot - Phone in system
Teletrolley Service
Vision Circuits
WB 200
WB
300 - Nuclear radio leak warning system
WB
400 - Air raid warning system
WB
500 - Electricity load control trial
WB
600 - Air raid siren system
WB
700 - Local Call Timing Tariff Pulse System
WB
800 - Music Distribution (Planned Music Ltd - MUSAK)
WB 900 - 1+1 subscribers carrier
system
WB
1000 - ABC Alarms
WB
1100
WB
1400 - Air raid warning system
Wideband private circuits
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