Specification for dual-tone multi-frequency (DTMF) signalling protocol for social alarm systems
BS 8521:2009
Specification for dual-tone multi-frequency (DTMF) signalling protocol for social alarm systems
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ISBN: 9780580550799
Keywords:
Messages, Control functions, Alarm systems, Information transfer, Telephone signalling equipment, Acoustic signals, Warning devices, Digital signals, Data transmission, Special-purpose alarms, Codes, Telephone networks, PDF
| Publication Date | 30 Apr 2009 |
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| Product SKU | 30129608 |
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| ISBN | 9780580550799 |
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| BSI Code | BS 8521:2009 |
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| No. of pages | 30 |
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| Replaces | BS 7369:1991 |
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| Publisher | British Standards Institution |
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