5ESS Switch - Ready For Tomorrow
11:34
5ESS - 340 MB Hard Drive Replacement
13:52
Alarmes de escritório central
25:31
AT&T Bell Labs 1 ESS (Electornic Switching System) Manufacturing Processes (1965)
28:10
AT&T Archives: The Phone Boom of the 1950s
10:48
A tour of AT&T's Network Operations Center (1979) - AT&T Archives
21:22
DMS-100 Startup and First Phone Calls
51:43
AT&T Telessentials Communication networks TC1605
16:08