Telephone exchange

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A crossbar switch (aka X-bar) is an assembly of individual switches with a set of inputs contacts and a set of outputs contacts. The switches are arranged in a matrix.  The system design was used in AT&T's 1XB crossbar Central Office (C.O.) exchanges, which entered service about 1938.  These crossbar systems were developed by Bell Telephone Labs, and were inspired by Swedish design. Pneumatic Tube, Telephone Exchange, Smart Auto, Vintage Telephone, Old Phone, Vintage Life, Telephones, Phone Stuff, Art Deco Era

A crossbar switch (aka X-bar) is an assembly of individual switches with a set of inputs contacts and a set of outputs contacts. The switches are arranged in a matrix. The system design was used in AT&T's 1XB crossbar Central Office (C.O.) exchanges, which entered service about 1938. These crossbar systems were developed by Bell Telephone Labs, and were inspired by Swedish design.

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Photo Exhibit: One Bell System. It works. “One hundred Years of Telephony in America” 1876 – 1976. Historical photos from the AT&T Photo Center. This collection of 100 photos was put together by the AT&T Photo Center in New York to commemorate “One hundred Years of Telephony in America” 1876 – 1976.We have added the original captions that … Continue reading "AT&T Photo Exhibit"

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