BS 8521:2009 :
BS 8521:2009 : 1395638
BS 8521:2009 :
Title: Specification for dual-tone multi-frequency (DTMF) signalling protocol for social alarm systems
Pages: 30
Year:
Publisher: BSI
Availability: Within 1-2 working days BSI will directly send the standards to End-User after our confirmation.
Title: Specification for dual-tone multi-frequency (DTMF) signalling protocol for social alarm systems
Pages: 30
Year:
Publisher: BSI
Availability: Within 1-2 working days BSI will directly send the standards to End-User after our confirmation.
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