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  • 08/30129607 DC : DRAFT JULY 2008

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    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    BS 8521 - SPECIFICATION FOR DUAL-TONE MULTI-FREQUENCY (DTMF) SIGNALLING PROTOCOL FOR SOCIAL ALARM SYSTEMS (21TC)

    Available format(s): 

    Superseded date:  30-04-2009

    Language(s): 

    Published date:  23-11-2012

    Publisher:  British Standards Institution

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    Comment Closes On
    Committee GW/1/12
    Document Type Draft
    Publisher British Standards Institution
    Status Superseded
    Superseded By

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

    ES 201 235-2 : 1.2.1 SPECIFICATION OF DUAL TONE MULTI-FREQUENCY (DTMF) TRANSMITTERS AND RECEIVERS; PART 2: TRANSMITTERS
    ES 201 235-1 : 1.1.1 SPECIFICATION OF DUAL TONE MULTI-FREQUENCY (DTMF) TRANSMITTERS AND RECEIVERS; PART 1: GENERAL
    ES 201 235-4 : 1.3.1 ACCESS AND TERMINALS (AT); SPECIFICATION OF DUAL-TONE MULTI-FREQUENCY (DTMF) TRANSMITTERS AND RECEIVERS; PART 4: TRANSMITTERS AND RECEIVERS FOR USE IN TERMINAL EQUIPMENT FOR END-TO-END SIGNALLING
    BS EN 50134-7:2017 Alarm systems. Social alarm systems Application guidelines
    BS EN 50134-3:2012 Alarm systems. Social alarm systems Local unit and controller
    BS EN 50134-5:2004 Alarm systems. Social alarm systems Interconnections and communications
    BS EN 50134-2:2000 Alarm systems. Social alarm systems Trigger devices
    BS EN 50134-1:2002 Alarm systems. Social alarm systems System requirements
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