Transfer of information and controls within a social alarm system by means of multi-frequency tone signals passing between a local unit and an alarm receiving station via the public switched telephone network.Cross References:BS 6305BS 6789:Section 6BS 6804
Original price was: $190.50.$95.00Current price is: $95.00.
Specification for multi-frequency tone signalling protocol for social alarm systems
BSI Group , 02/28/1991
Pages: 16
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