Strowger step switch (SXS) demo system overview, for beginner's.
25:01
Business 1A2 type phone systems for beginners. (Overview)
22:13
Strowger Step By Step Telephone exchange A close Look
1:40:10
The Line Finder In The Step-By-Step Telephone Switching System
17:28
Even Older Strowger Switches 1940's UAX12 Exchange
19:10
The Sounds of Long Distance, Introduction
33:17
[Panel] How does the line finder work?
10:20
Ani and Cognitronics Announcer in a Strowger step switch.
8:43