The Telephone Exchange (1982) British Telecom Schools Film
46:30
Hanging On The Phone - British Telecom Documentary 2001
17:12
BT Educational Service - call routing from UK to Australia
31:12
Full Mechanical: The Panel Telephone Switch
24:29
CARW: Bell's Nuclear-War Telephone Network
16:47
Multiply and Divide (1979) GPO UK Telephone Directory Production - UK Industrial Film
23:56
Building A 1960's Electromechanical Telephone Exchange For People To Use
22:28
”THE TELEPHONE EXCHANGE” 1982 BRITISH TELECOMMUNICATIONS DOCUMENTARY MONDIAL HOUSE XD47854
1:54:48