Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of subscriber loop or terminal
Patent
1993-10-20
1996-10-15
Chin, Wellington
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
Testing of subscriber loop or terminal
379 10, 379 14, 370 13, H04M 124, H04M 308, H04M 322, H04J 116
Patent
active
055662234
ABSTRACT:
A communications system includes a host-exchange system having a host exchange, a mate-exchange system having a mate exchange accommodating a mate-exchange subscriber terminal, and a communications medium connecting the host-exchange system and the mate-exchange system together. The mate-exchange system includes a first unit for collecting maintenance information as to whether or not the mate-exchange subscriber terminal is operable, and a second unit for sending the maintenance information to the host-exchange system via a transmission range allotted to the mate-exchange subscriber terminal on the communications medium. The host-exchange system includes a third unit for monitoring a state of the mate-exchange subscriber terminal on the basis of the maintenance information from the second unit and for controlling a call addressed to the mate-exchange subscriber terminal.
REFERENCES:
patent: 4922515 (1990-05-01), Simpson, Jr.
patent: 5083308 (1992-01-01), Gaulke et al.
patent: 5166925 (1992-11-01), Ward
patent: 5249222 (1993-09-01), Pinard
Chin Wellington
Fujitsu Limited
Loomis Paul
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