Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of data transmission
Patent
1994-06-09
1996-02-27
Chin, Stephen
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
Of data transmission
379 2, 379 10, 379 27, 379 29, H04M 124, H04M 308, H04M 322
Patent
active
054955165
ABSTRACT:
Systems and methods are provided for automatically and remotely establishing a diagnostic channel between a network managed master digital service unit (DSU) and a remote fractional T1 or E1 DSU. In the preferred method, the master DSU sends a priming sequence in all of the DS0s/TS0s of the DS0/TS0 bundle intended for the remote DSU which is comprised of a two second break, followed by a relatively low frequency signal which identifies at least the diagnostic channel for the remote DSU. In response, the remote DSU sends a confirmation signal to the master over the identified diagnostic channel, after which the master DSU can send configuration information over the same diagnostic channel.
REFERENCES:
patent: 4860281 (1989-08-01), Finley
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patent: 5197062 (1993-03-01), Picklesimer
patent: 5210740 (1993-05-01), Anzai
patent: 5222083 (1993-06-01), Khouri
patent: 5276727 (1994-01-01), Kim
patent: 5301207 (1994-04-01), Emerson
patent: 5337306 (1994-08-01), Hall
patent: 5343461 (1994-08-01), Barton
Byczko Joseph S.
Lee Seng P.
Chin Stephen
General Datacomm, Inc.
Gordon David P.
Shankar Vijay
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