Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of network terminating interface – subscriber trunk...
Patent
1997-03-31
1999-06-29
Loomis, Paul
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
Testing of network terminating interface, subscriber trunk...
379 30, 379 6, 324534, H04M 124, G01R 3111
Patent
active
059178850
ABSTRACT:
A line interface circuit (120) receives an audio signal from a signal generator (132). A reflected signal is produced at the output port (216) of a SLIC (210). The reflected signal is combined with the received audio signal to produce a combined audio signal. The combined audio signal is measured to determine if a fault exists in the subscriber loop (130).
REFERENCES:
patent: 5083086 (1992-01-01), Steiner
patent: 5121420 (1992-06-01), Marr et al.
patent: 5633909 (1997-05-01), Fitch
patent: 5649304 (1997-07-01), Cabot
Berken James J.
Freyman Phillip K.
Green David A.
Mansen Andrew J.
Berry Thomas G.
Loomis Paul
Motorola Inc.
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