Cellular network data transmission system

Details Cellular network data transmission system Cellular network data transmission system

1989-08-31

1992-09-08

Dwyer, James L.

Telephonic communications

Emergency or alarm communications

Responsive to sensed nonsystem condition

379 39, 379 59, H04M 1104

Patent

active

051464861

ABSTRACT:
A data transmission network uses a cellular network as a primary telecommunications link and a landline as a backup telecommunications link. The system continuously monitors the links and switches to the back up link if the cellular link is not operative. A software package is included in the computer at a monitoring station for effecting integrity checks of the links, and RF fault modules are also included.

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patent: 4887290 (1989-12-01), Dop et al.
patent: 4972455 (1990-11-01), Phillips et al.

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