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
BS 7369:1991 History
BS 8521:2009
$132.00 $264.00
BS 7369:1991
$95.00 $190.00
More Standards PDF
BS 2853:2011
$80.00 $160.00
BS 5L 101:2011
$154.00 $309.00
BS DD CEN/TS 16157-1:2011
$175.00 $350.00
BS 6748:1986+A1:2011
$80.00 $160.00







