Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Including fault responsive disconnection of tested component
Patent
1988-03-24
1989-08-01
Ng, Jin F.
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
Including fault responsive disconnection of tested component
379 94, H04M 1106
Patent
active
048539490
ABSTRACT:
A fail safe voice system and method for digital telephone networks. The system provides for operation of voice telephone equipment at a customer location when a fault occurs at the customer location. The system has a central office with an analog line termination/digital transceiver connected to subscriber loop lines. The customer location has a digital transceiver/analog station set interface connected to the subscriber loop lines and to the voice telephone equipment. In response to a fault at the customer location the voice telephone equipment is connected directly to the subscriber loop lines thereby eliminating the digital transceiver/analog station set interface.
REFERENCES:
patent: 4381427 (1983-04-01), Cheal
patent: 4392024 (1983-07-01), Shinoi
patent: 4740963 (1988-04-01), Eckley
Dorth John P.
Miller Bruce R.
Pucci Gregory P.
Schorr Ian A.
Hamann H. F.
Lewis Bonita
Ng Jin F.
Patti C. B.
Rockwell International Corporation
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