H - Electricity – 04 – Q
Patent
H - Electricity
04
Q
344/1.2
H04Q 1/24 (2006.01)
Patent
CA 1166728
G17-001C 83 Abstract of the Disclosure A fault monitoring and diagnostic system for a telephony switching system. Two call processing systems connect through a programmable switch to port group units that receive individual telephone lines. All signals from the port group units are conveyed to both call processing systems, and the call processing systems operate in synchronism. However, the programmable switch conveys signals back to the port group units from only one of the call processing systems. Fault monitoring and diagnositc circuitry monitors various conditions within the telephony switching system. A test call generator automatically performs test calls thereby to diagnose system problems. If a fault is detected, the fault monitoring and diagnostic system controls the programmable switch and, in appropriate circumstances, couples the output signals from the other call processing system to the port group units. Information concerning the nature of the fault is also provided.
418652
Beebe Otto W.
Brightman Barrie
Hanson George C.
Lee Ernest O.
Subrin Richard I.
Smart & Biggar
Stromberg-Carlson Corporation
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