Crossbar telephone exchange demo
22:38
My vintage Strowger Telephone Exchange Demonstrator
11:06
DMS-10: The first phone call!
13:40
Ericsson XY selector demo
14:11
Electromechanical memory - Impulse regenerator nr 1
35:12
How does a No. 1 Crossbar work? - Dial Equipment Appreciation, Part 2
34:39
Long Lines
3:58
1950s Switchboard Operations
14:27