My vintage Strowger Telephone Exchange Demonstrator
13:40
Ericsson XY selector demo
1:40:10
The Line Finder In The Step-By-Step Telephone Switching System
22:28
”THE TELEPHONE EXCHANGE” 1982 BRITISH TELECOMMUNICATIONS DOCUMENTARY MONDIAL HOUSE XD47854
17:40
Plugging a Vintage Telephone Exchange Into The Internet So People Can Use It
14:11
Electromechanical memory - Impulse regenerator nr 1
27:08
At the Connections Museum: the insane telephone technology that led to today's computers
10:28
Pre-2000 Strowger selector demonstrator
29:49