Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of subscriber loop or terminal
Patent
1994-12-20
1997-01-28
Chin, Wellington
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
Testing of subscriber loop or terminal
379 29, 379398, 379438, 439148, H04M 121, H04M 308
Patent
active
055984550
ABSTRACT:
A test system directed to apparatus for transmitting and receiving multiple telephone transmission signals over a single twisted pair. The system converts an analog signal from a local switching station to an 80 ksymbols/sec signal for transmission over a twisted pair by a line card. A remote terminal converts the 80 ksymbols/sec signal back into a conventional analog signal for use in conventional telephone, facsimile or other related equipment. The test equipment separately tests the entire system, the line card portion of the system, the remote terminal portion of the system, and the twisted pair.
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Bliven David C.
Mullaney Julian S.
Shimirak Gerald L.
Vail Philip B.
Vranicar Anthony
Burkard Herbert G.
Chin Wellington
Loomis Paul
Raychem Corporation
Zahrt II William D.
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