G - Physics – 08 – B
Patent
G - Physics
08
B
350/2
G08B 26/00 (2006.01) G08B 25/08 (2006.01) H04B 17/02 (2006.01)
Patent
CA 1265231
ABSTRACT Apparatus for monitoring the status of and controlling faults at remotely-located components in a single line communications system wherein return data signals from the components are transmitted in the 50 kHz to 200 kHz range, and coupled to the low pass filters commonly used to bypass the active components, thereby permitting the return of signals to the system head-end.
540481
Alpha Technologies Inc.
Gilbert William C.
Macrae & Co.
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