Your search resulted in 2 documents for "BS BS 6450-1" amongst all current BS documents.

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  1. MOST RECENT

    1105395

    BS 6450-1:1993

    Private branch exchanges for connection to public switched telephone networks run by certain public telecommunications operators-Specification for general requirements

    standard by BSI Group, 02/15/1993.

    Languages: English

    Historical Editions: BS 6450-1:1983

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  2. MOST RECENT

    1105401

    BS 6450-7:1990

    Private branch exchanges for connection to public switched telephone networks run by certain public telecommunication operators-Specification for the procedure for in-service observation of PBXs undergoing type approval

    standard by BSI Group, 10/28/1990.

    Languages: English

    Historical Editions: BS 6450-7:1984

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