Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of subscriber loop or terminal
Patent
1993-03-08
1995-12-05
Chin, Stephen
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
Testing of subscriber loop or terminal
379 22, H04M 330
Patent
active
054736650
ABSTRACT:
Non-intrusive performance monitoring of a DS0 channel between a customer premises interface and a D4 channel bank includes an augmentation of existing channel bank equipment and a digital services communication device terminating the DS0 link at the customer site. An auxiliary signalling and performance monitoring arrangement is remotely accessible by a non-resident control site, thereby enabling the control site to perform prescribed network supervisory tasks with respect to one or more selected DS0 links. Office channel unit data port and line interface components of the channel bank are modified to provide bidirectional signalling capability via the receive segment of the channel bank's internal communications link. The signalling format on the bidirectional signalling link is defined so as to support both the transmission of incoming (received DS1) signalling traffic from the line interface unit to an office channel unit, and the bidirectional exchange of performance-monitoring command and response messages. A performance monitoring arrangement, monitors at least one prescribed performance aspect of the DS0 channel.
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Hall Clifford L.
Harris Norman R.
Killian Stephen T.
Wells Jeffrey B.
Adtran
Chin Stephen
May Timothy J.
Wands Charles
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