No 5 Crossbar Tour

A walk through the 5XB [annotated]

The Line Finder In The Step-By-Step Telephone Switching System

The Life of a Telephone Operator in 1969 (with special introduction) - AT&T Archives

Crossbar telephone exchange demo

How does a No. 1 Crossbar Marker work?

cut5.avi

[Panel] How does the line finder work?

Набор номера через пошаговую систему телефонной коммутации.

AT&T Bell Labs 1 ESS (Electornic Switching System) Manufacturing Processes (1965)

Выбор кол-ва витков катушек, но другими словами. Еффективная АРУ для каскодных каскадов УПЧ, ч,1.

[Panel] Sarah troubleshoots Incoming #30

Телефонная станция «Strowger Step By Step»

A tour of AT&T's Network Operations Center (1979) - AT&T Archives

Telephone Switching Before Computers

DMS-100 Startup and First Phone Calls

Poulton Telephone Exchange 1992 Digital Changeover

All calls are failing in the Panel office!

#5 Crossbar Switch in Newark, New York - 1990

"TOOLS OF TELEPHONY" 1956 WESTERN ELECTRIC TELEPHONE SYSTEM PROMO FILM BELL SYSTEM 98694

At the Connections Museum: the insane telephone technology that led to today's computers