Strowger switch

Sources

1. ArchivalAutomatic Telephone-Exchange
2. BookAmerica Calling: A Social History of the Telephone to 1940

invented by:

• Almon Brown Strowger

  Sources: Automatic Telephone-Exchange

Appears in1 item

• 
  Telegraph to Smartphone1 item
  • Strowger’s automatic exchange3 Nov 1892