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  • BS 6450-3.1:1993

    Withdrawn A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

    Private branch exchanges for connection to public switched telephone networks run by certain public telecommunication operators. Direct dialling in on private branch exchanges Specification for direct dialling in on private branch exchanges with terminating stations treated as an entirety

    Available format(s):  Hardcopy, PDF

    Withdrawn date:  01-05-2009

    Language(s):  English

    Published date:  15-01-1993

    Publisher:  British Standards Institution

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    Abstract - (Show below) - (Hide below)

    Specifies requirements at the connection point for direct dialling in (DDI) on PBXs connected at the user's premises directly or via one or more pieces of other apparatus or wiring to the 2-wire presented DDI analogue interface of a PSTN and where the terminating stations together with cabling are treated with the PBX as an entirety. Applies to PBXs with their terminating stations that are installed on a single set of premises. Coverage includes definitions and abbreviations, conformance principles, electrical characteristics and PBX software.

    General Product Information - (Show below) - (Hide below)

    Committee W/-
    Development Note Inactive for the new design. Supersedes 90/94506 DC (09/2005)
    Document Type Standard
    Publisher British Standards Institution
    Status Withdrawn

    Standards Referenced By This Book - (Show below) - (Hide below)

    BS 6450-4:1993 Private branch exchanges for connection to public switched telephone networks run by certain public telecommunications operators Specification for ports
    PD 7003:1996 ESSENTIAL REQUIREMENTS FOR TERMINAL EQUIPMENT INTENDED FOR CONNECTION TO ANALOGUE INTERFACES OF THE PSTN USING DIRECT DIALLING IN

    Standards Referencing This Book - (Show below) - (Hide below)

    BS 6484:1984 Specification for electrical safety requirements for independent power supply units for indirect connection to certain telecommunication networks
    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
    BS 2045:1965 Preferred numbers
    BS 6450-6.1:1993 Private branch exchanges for connection to public switched telephone networks run by certain public telecommunications operators. Simple call-routeing mode (SCRM) Specification for the simple call-routeing mode of PBX operation, with terminating stations treated as an entirety
    BS 6450-5.1:1993 Private branch exchanges for connection to the British Telecommunications public switched telephone network. Facilities on private branch exchanges Specification for facilities on private branch exchanges with terminating stations treated as an entirety
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