Strowger switch
Electromechanical telephone switch / From Wikipedia, the free encyclopedia
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"SXS" redirects here. For the flash memory standard, see SxS. For the Microsoft Windows SxS, see Side-by-side assembly. For the Side by Side all terrain vehicle, see Side by Side (UTV).
The Strowger switch is the first commercially successful electromechanical stepping switch telephone exchange system. It was developed by the Strowger Automatic Telephone Exchange Company founded in 1891 by Almon Brown Strowger. Because of its operational characteristics, it is also known as a step-by-step (SXS) switch.
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