A Call To PEnnsylvania 6-5000 Through The Step-by-Step Telephone Switching System
Watch and listen to the progress of a call through vintage Step-by-Step telephone switching equipment.
You can see a complete SXS Central Office in operation at this link https://www.youtube.com/watch?v=_VO7MWFI9SU
Видео A Call To PEnnsylvania 6-5000 Through The Step-by-Step Telephone Switching System канала Hicken65
You can see a complete SXS Central Office in operation at this link https://www.youtube.com/watch?v=_VO7MWFI9SU
Видео A Call To PEnnsylvania 6-5000 Through The Step-by-Step Telephone Switching System канала Hicken65
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