Tivadar Puskás
Ezra Gilliland

Raymond W. Ketchledge

Telephone switching innovator
Bell Labs  |  Associates: Erna Schneider Hoover, Amos E. Joel Jr.
From Wikipedia

Raymond Waibel Ketchledge (December 8, 1919 – October 23, 1987) was an American engineer, known for his contributions to the first computerized telephone switching control systems.

Born in Harrisburg, Pennsylvania, Ketchledge married Lois Jane Quackenbush. He earned a B.Sc. and M.Sc. (1942) in electrical engineering from the Massachusetts Institute of Technology before joining Bell Labs where he stayed for his whole professional career (1942–1982).
At Bell Labs he first worked on the Mark 24 FIDO Torpedo used in World War II, then took part in developing the first underwater repeater… More on Wikipedia →

Timeline events (1)

World's first electronic telephone switch (No. 1 ESS) installed
World's first electronic telephone switch (No. 1 ESS) installed
1965

Videos (1)

Electronic Switching System Debut (Bell System)
Electronic Switching System Debut (Bell System)
1965

Related concepts (2)

Electronic switching system
In telecommunications, an electronic switching system (ESS) is a telephone switch that uses solid-state electronics, such as digital electronics and computerized common c…
More on Wikipedia →
Number One Electronic Switching System
The Number One Electronic Switching System (1ESS) was the first large-scale stored program control (SPC) telephone exchange or electronic switching system in the Bell Sys…
More on Wikipedia →

Categories

Digital Switching