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PD 6571:1992

Withdrawn
Withdrawn

A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

BS 6789-2:1992. Apparatus with one or more particularfunctions for connection to public switched telephone networks run bycertain public telecommunication operators. Specification forapparatus with loudspeaking facilities
Available format(s)

Hardcopy , PDF

Withdrawn date

02-08-2013

Language(s)

English

Published date

31-10-1992

Publisher

British Standards Institution

Committees responsible
Preface
Foreword
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 (speech
    apparatus)
Section two. Electrical characteristics of apparatus
6 Apparatus on-line (non-signalling state)
7 Transmission process
Appendices
A General conditions of test
B Methods of test
Tables
1 Not assigned
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 Not assigned
2 Measurements of free field sound pressure used in
    the determination of sending sensitivity
3 Physical test arrangement for determining the
    sending characteristics
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 characteristic
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

Specifies requirements for loudspeaking facilities incorporated in apparatus for connection to a single exchange line or to systems connected to the public switched telephone network. Not applicable to apparatus for connection to shared service lines nor to apparatus for connection between a TJF of a PBX and the PSTN lines of a PBX. Only applies where the apparatus containing the loudspeaking facility also gives either integral handset telephony or the capability of associated handset telephony. Coverage includes: abbreviations, definitions and notation; apparatus on-line (non-signalling state); transmission process. Also includes appendices, tables and diagrams.

Committee
TCT/301
DevelopmentNote
Supersedes 91/94132 DC. (08/2005) Inactive for the new design. (01/2011)
DocumentType
Standard
Pages
44
PublisherName
British Standards Institution
Status
Withdrawn

PD 6569-2:1992 Draft standard to match to and work with ETS 300 001/NET4 \'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

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BS 6789-2:1984 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
BS 4778(1979) : LATEST QUALITY VOCABULARY
BS 6450-4:1993 Private branch exchanges for connection to public switched telephone networks run by certain public telecommunications operators Specification for ports
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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PDF - English
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