BS 8521:2009
Current
Date published:
Specification for dual-tone multi-frequency (DTMF) signalling protocol for social alarm systems
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Related Information
13.320 Alarm and warning systems
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BS 8521:2009
Get this standard
Prices exclude GST
PDF
( Single user document)
$425.22 NZD
PDF
( Single user document)
$395.60 NZD
HardCopy
$461.74 NZD