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  6. Current: Number 5 Crossbar Switching System (1948)
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Permanent exhibition

Exhibition 'Number 5 Crossbar Switching System (1948)' in Connections Museum

The Number 5 Crossbar Telephone Switch was from the last generation of crossbar switching technology in the US. Developed by AT&T in the late 40's, this unit - one of a handful in existence - handled calls at nearby Mercer Island's Adams office from the late 1950s to the 1980s when it was given to the museum.

It had a number of improvements over early crossbar switches. In addition to handling direct-dialed long distance calls, it had a trouble ticket puncher that could record information about problems detected automatically by the switch when calls were put through.

See it in operator on your guided tour of the museum.

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Connections Museum

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  1.  4.2Connections Museum

    Connections Museum

     Seattle, WA
    The Connections Museum, previously known as the Herbert H. Warrick Jr. Museum of Communications, is situated in the Georgetown neighborhood of Seattle. The museum is a part of the Telecommunications History Group and was originally sponsored by the Washington Telephone Pioneers. It was founded by Don Ostrand and Herb Warrick, both employees of Pacific Northwest Bell.
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Other exhibitions in Connections Museum

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