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  • BS 6789-2:1984

    Withdrawn A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
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    APPARATUS WITH ONE OR MORE PARTICULAR FUNCTIONS FOR CONNECTION TO PUBLIC SWITCHED TELEPHONE NETWORKS RUN BY CERTAIN PUBLIC TELECOMMUNICATIONS OPERATORS - SPECIFICATION FOR APPARATUS WITH LOUDSPEAKING FACILITIES

    Available format(s):  Hardcopy, PDF

    Withdrawn date:  02-08-2013

    Language(s):  English

    Published date:  01-01-1984

    Publisher:  British Standards Institution

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    Table of Contents - (Show below) - (Hide below)

    Foreword
    Committees responsible
    Specification
    Section one. General
    1. Scope
    2. Abbreviations, definitions and notation
    3. General requirements and test conditions
    4. Information to be provided by the supplier
    5. Electrical network connection methods
    Section two. Electrical characteristics of apparatus
    6. Apparatus on-line (non-signalling state)
    7. Speech transmission process
    Appendices
    A. General conditions of test
    B. Methods of test
    Tables
    1. Coordinates of voltage limit curves for d.c.
        characteristics
    2. Limits of sending sensitivity for line lengths up
        to and including 3 km
    3. Limits of sending sensitivity for line lengths in
        the range over 3 km to 7.5 km
    4. Limits of noise levels for noise criterion curve
        NC 15
    5. Data required to calculate Z
    6. Psophometric weighting characteristics
    Figures
    1. D.C. characteristics: upper limit for type B
        apparatus
    2. Measurement of free field sound pressure used in
        the determination of sending sensitivity
    3. Physical test arrangement for determining the
        sending characteristic
    4. Limits of sending sensitivity for line lengths up
        to and including 3 km
    5. Limits of sending sensitivity for line lengths in
        the range over 3 km to 7.5 km
    6. Physical test arrangement for determining the
        receiving characteristics
    7. Noise criterion curve NC 15
    8. Dimensions of test table
    9. Position of LST
    10. The local telephone system
    11. D.C. excited test circuit
    12. Axes used in the determination of free field
        conditions for 1 m radius sphere

    Abstract - (Show below) - (Hide below)

    Describes requirements for loud-speaking facilities incorporated in extension apparatus for connection to a single exchange line of the British Telecommunications public switched telephone network. Does not apply to apparatus for connection to shared service lines or 1 + 1 carrier systems. Applies only where the apparatus containing the loudspeaking facility also provides either integral handset telephony or the capability of associated handset telephony. Excludes apparatus with control of or switching of voice circuits. Applies to apparatus for household, office and similar general indoor use. Covers abbreviations, definitions and notation, general requirements and test conditions information to be provided by the supplier, electrical network connection methods, apparatus on-line and speech transmission process.

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

    Committee TCT/2
    Development Note Supersedes 82/62714 DC (09/2005) Inactive for the new design. (01/2011)
    Document Type Standard
    Publisher British Standards Institution
    Status Withdrawn

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

    BS 7606:1992 SPECIFICATION FOR SOCIAL ALARM SYSTEM APPARATUS FOR CONNECTION TO PUBLIC SWITCHED TELEPHONE NETWORKS
    PD 6571:1992 TEXT FOR BS 6789-2:1992 'APPARATUS WITH ONE OR MORE PARTICULAR FUNCTIONS FOR CONNECTION TO PUBLIC SWITCHED TELEPHONE NETWORKS RUN BY CERTAIN PUBLIC TELECOMMUNICATION OPERATORS - PART 2: SPECIFICATION FOR APPARATUS WITH LOUDSPEAKING FACILITIES'
    BS 6450-5.1(1984) : 1984
    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
    BS 6328-1:1985 APPARATUS FOR CONNECTION TO PRIVATE CIRCUITS RUN BY CERTAIN PUBLIC TELECOMMUNICATION OPERATORS - SPECIFICATION FOR APPARATUS FOR CONNECTION TO SPEECHBAND CIRCUITS
    PD 6561:1992 A DRAFT AMENDMENT TO BS 6789-1:1984 'APPARATUS WITH ONE OR MORE PARTICULAR FUNCTIONS FOR CONNECTION TO THE BRITISH TELECOMMUNICATIONS PUBLIC SWITCHED TELEPHONE NETWORK - PART 1: SPECIFICATION FOR GENERAL REQUIREMENTS'
    BS 6789-1:1984 APPARATUS WITH ONE OR MORE PARTICULAR FUNCTIONS FOR CONNECTION TO PUBLIC SWITCHED TELEPHONE NETWORKS RUN BY CERTAIN PUBLIC TELECOMMUNICATIONS OPERATORS - SPECIFICATION FOR GENERAL REQUIREMENTS
    PD 6564:1992 A DRAFT AMENDMENT TO BS 6789-6.1:1986 'APPARATUS WITH ONE OR MORE PARTICULAR FUNCTIONS FOR CONNECTION TO CERTAIN PUBLIC SWITCHED TELEPHONE NETWORKS - PART 6: SPECIFICATION FOR SERIES CONNECTED APPARATUS - SECTION 6.1 - APPARATUS HAVING MAXIMUM ALLOWABLE IMPAIRMENTS'

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

    BS 5940-1:1980 OFFICE FURNITURE - SPECIFICATION FOR DESIGN AND DIMENSIONS OF OFFICE WORKSTATIONS, DESKS, TABLES AND CHAIRS
    BS 1088 & 4079:1966 SPECIFICATIONS FOR PLYWOOD FOR MARINE CRAFT
    BS 6312:1982 SPECIFICATION FOR PLUGS FOR USE WITH BRITISH TELECOMMUNICATIONS LINE JACK UNITS
    BS 4778(1979) : LATEST QUALITY VOCABULARY
    BS 3593:1963 RECOMMENDATION ON PREFERRED FREQUENCIES FOR ACOUSTICAL MEASUREMENTS
    BS 6317:1982 SPECIFICATION FOR SIMPLE TELEPHONES FOR CONNECTION TO PUBLIC SWITCHED TELEPHONE NETWORKS RUN BY CERTAIN PUBLIC TELECOMMUNICATION OPERATORS
    BS 2475:1964 SPECIFICATION FOR OCTAVE AND ONE THIRD OCTAVE BAND PASS FILTERS
    BS 6789-1:1984 APPARATUS WITH ONE OR MORE PARTICULAR FUNCTIONS FOR CONNECTION TO PUBLIC SWITCHED TELEPHONE NETWORKS RUN BY CERTAIN PUBLIC TELECOMMUNICATIONS OPERATORS - SPECIFICATION FOR GENERAL REQUIREMENTS
    BS 6305:1982 SPECIFICATION FOR GENERAL REQUIREMENTS FOR APPARATUS FOR CONNECTION TO THE BRITISH TELECOMMUNICATIONS PUBLIC SWITCHED TELEPHONE NETWORK
    BS 6789-6.2:1989 APPARATUS WITH ONE OR MORE PARTICULAR FUNCTIONS FOR CONNECTION TO CERTAIN PUBLIC SWITCHED TELEPHONE NETWORKS - SPECIFICATION FOR SERIES CONNECTED APPARATUS - APPARATUS HAVING LESS THAN MAXIMUM ALLOWABLE IMPAIRMENTS
    BS 6789-6.1:1986 APPARATUS WITH ONE OR MORE PARTICULAR FUNCTIONS FOR CONNECTION TO CERTAIN PUBLIC SWITCHED TELEPHONE NETWORKS - SPECIFICATION FOR SERIES CONNECTED APPARATUS - APPARATUS HAVING MAXIMUM ALLOWABLE IMPAIRMENTS
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