Telephone Timeline: Exchanges - Telephonearchive.com

Holmes Burglar Alarm Company of Boston installs first telephone exchange

1877

Tivadar Puskás designs first telephone exchange

1877

Coy opens the first telephone exchange (in New Haven)

1878

First telephone exchange opens in London

1879

Puskas sets up first telephone exchange in Paris

1879

Telephone Exchanges open in Berlin, Vienna, and Sydney

1881

Operators working at a 'pyramid' switchboard

1881

First telephone exchanges in India, Russia, and Shanghai

1882

Operators at Boston's Tremont St central office

1883

Puskas introduces the multiplex switchboard

1887

First 'common battery' central office (Lexington, Mass.)

American Bell Telephone

1893

Lines going into the back of switchboards in Los Angeles central office

Network

1894

The Tele Skater Girls

Workforce

1929

The World's Switchboard!

General Post Office/BT

1932