1936
1938
AE 50 "Jukebox"
Black Model 302
Green GPO 332
Red 332
Red AE50 Jukebox
Secraphone Secure Phone
WE 354
Alec Reeves invents pulse code modulation
PDF:
AT&T Annual Report, 1937
Ad: Long Distance Rate Reductions
Video: Jean Arthur in Easy Living
PDF:
Ericsson 1937 switchboard catalog
PDF:
Rural Telphone Lines
PDF:
The Birth and Babyhood Of the Telephone, By Thomas Watson
