1979-05-10
1981-02-10
Konick, Bernard
179 5R, H04M 1104
Patent
active
042503523
ABSTRACT:
A system for monitoring the operating condition of one or more reporting devices, which incorporates a telephone network connecting a remote terminal and a monitor terminal. A control circuit is provided in which one or more monitor relays are interposed, each monitor relay opening independently in response to a change in operating condition of a reporting device. When a monitor relay opens, current flow is interrupted to a return signal control relay, which thereby short-circuits the subscriber loop to the remote terminal, so that a busy signal is returned in response to calls from the monitor terminal. When all monitor relays are closed, indicating all reporting devices to be in normal condition, the return signal control relay is energized, opening the short circuit in the subscriber loop. Accordingly, a ringing signal is returned in response to calls to the remote terminal.
REFERENCES:
patent: 3612768 (1971-10-01), Sherman
patent: 3809813 (1974-05-01), Brown
patent: 3891802 (1975-06-01), Bartelink
Konick Bernard
Popek Joseph A.
LandOfFree
Remote station monitoring system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Remote station monitoring system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Remote station monitoring system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1666624