Method for transmission of alarm signals utilizing an entrance t

Details Method for transmission of alarm signals utilizing an entrance t Method for transmission of alarm signals utilizing an entrance t

1988-07-18

1989-10-03

George, Keith E.

Telephonic communications

Emergency or alarm communications

Responsive to sensed nonsystem condition

379103, H04M 1104

Patent

active

048721948

ABSTRACT:
A method and apparatus for transmission of alarm signals by utilization of an entrance telephone set system connected to a public telephone network, of the type including a selectively addressable telephone number dialing device, preferably of the type disclosed in U.S. Pat. No. 3,947,641, the telephone number dialing device being connected to one or a number of manually or automatically operable alarm indicators, which when operated initiate dialing of predetermined telephone numbers.

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patent: 4503288 (1985-03-01), Kessler
patent: 4521645 (1985-06-01), Carroll
patent: 4578540 (1986-03-01), Borg et al.

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