End of an Era | BT Heritage
27:08
At the Connections Museum: the insane telephone technology that led to today's computers
22:28
”THE TELEPHONE EXCHANGE” 1982 BRITISH TELECOMMUNICATIONS DOCUMENTARY MONDIAL HOUSE XD47854
9:07
BT Tower - An exclusive inside look
14:36
Underground Telephone Exchange 'Guardian' Manchester(True Story)
17:40
Plugging a Vintage Telephone Exchange Into The Internet So People Can Use It
28:10
AT&T Archives: The Phone Boom of the 1950s
18:10
Why America's Forgotten Microwave Skyway Network is still standing | Abandoned
15:45