Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1997-03-20
1999-08-17
Hofsass, Jeffery A.
Communications: electrical
Condition responsive indicating system
With particular system function
340531, 340539, 340533, 340534, 379 37, 379 39, 379 40, G08B 2900
Patent
active
059399805
ABSTRACT:
A telecommunity alarm system having a plurality of security surveillance modems that can be connected to a telecommunication network via an analog or digital subscriber terminal port, the security surveillance modems forming a group of a predetermined size. The security surveillance modems each have a first memory for storing telephone numbers of the other modems in the group, a second memory for identifying the particular modem and a programmable control unit. The modems are designed to dial automatically, in the event of an alarm, the other security surveillance modems belonging to the group and signal the alarm status.
REFERENCES:
patent: 4951029 (1990-08-01), Severson
Albrecht Andreas
Heitmann Gunter
Schulz Ralf
Schumacher Wolfgang
Wendt Matthias
Deutsche Telekom AG
Hofsass Jeffery A.
Pope Daryl C.
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