BS 8521:2009

$142.49

Specification for dual-tone multi-frequency (DTMF) signalling protocol for social alarm systems

Published By	Publication Date	Number of Pages
BSI	2009	30

Guaranteed Safe Checkout

Category: BSI

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

Description

This British Standard specifies requirements for the transfer of information and controls within a social alarm system, by means of dual‑tone multi‑frequency (DTMF) tone signals passing between site control or local equipment and an alarm receiving centre via the public switched telephone network (PSTN) supporting voice traffic conforming to ITU‑T Recommendation G.711 [1].

The standard specifies an in‑call protocol which supports the 300 ms maximum round trip delay specified in the UK National Transmission Plan [2] for connections over the fixed network.

Additional information

Status	Under Review
Pages	30
Publication Date	2009-04-30
ISBN	978 0 580 55079 9
Standard Number	BS 8521:2009
Title	Specification for dual-tone multi-frequency (DTMF) signalling protocol for social alarm systems
Replaces	BS 7369:1991
Descriptors	Messages, Control functions, Alarm systems, Information transfer, Telephone signalling equipment, Acoustic signals, Warning devices, Digital signals, Data transmission, Special-purpose alarms, Codes, Telephone networks
Publisher	BSI
Committee	GW/1/12
ICS Codes	13.320 - Alarm and warning systems

Preview PDF


PDF Format	Searchable	Printable	Preview Now

BS 8521:2009

Related products