H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 7/26 (2006.01) H04M 11/04 (2006.01) H04Q 7/22 (2006.01)
Patent
CA 2137915
2137915 9326114 PCTABS00028 A data transmission network uses a primary telecommunications link as a cellular network (32), and a backup telecommunications link. The system continuously monitors the links and switches to the back up link (50) if the cellular link is not operative. Examples of backup links include long-range radio and fiber optics (50''). A software package is included in a computer (33) at a monitoring station (39) for effecting integrity checks of the links, and RF fault modules (70) are also included. The RF fault module (70) can be used in conjunction with a control panel having one line output or with a control panel having two separate line outputs.
Kirby Eades Gale Baker
Lebowitz Mayer M.
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