Telephone Firsts: Electronic Central Office Switching Sys...

Telephone Firsts: Electronic Central Office Switching Sys...

Telephone Firsts: Electronic Central Office Switching Sys...

video on Telephone Firsts: In 1965 the first Electronic Central Office Switching System was introduced which allowed call forwarding, etc…

User: WatchMojo

Views: 1

Uploaded: 2009-04-25

Duration: 00:22

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