Specification for dual-tone multi-frequency (DTMF) signalling protocol for social alarm systems Ingestion-build-100998 and dismantling

and dismantling

in a static location (i

The performance of the examination system shall be verified at specified intervals both on-site and in the laboratory

Needs to demonstrate its ability to consistently provide a product that meets customer and applicable statutory and regulatory requirements

Well storage

Specification for dual-tone multi-frequency (DTMF) signalling protocol for social alarm systems Ingestion-build-100998 and dismantlingBS 8521: 2009 Specification for dual tone multi frequency (DTMF) signalling protocol for social alarm systems BS 8521 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