Transmission circuit of fire protection/security system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 11, 1989
Grant Date -
N/A
app pub date -
Sep 15, 1987
filing date -
May 28, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A transmission circuit is disposed in at least one of a control panel and a plurality of terminal devices of a fire protection/security system, wherein the control panel individually polls the terminal devices to read in terminal information from the terminal devices, to judge and/or display the information, or to control the terminal devices. The transmission circuit includes a signal sending device for sending a signal to a signal line, a memory device for storing a signal to be sent to the signal line, and a coincidence decision device for deciding a coincidence between the signal sent from the signal sending device and the signal stored in the memory device.
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