Diagnostic channel wakeup sequence for network managed fractional T1 or E1 digital service units
AssigneeGeneral DataComm, Inc.
InventorsSeng P. Lee, Joseph S. Byczko
Life of this patent
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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.
Claims21
A method of automatically establishing a diagnostic channel between a network managed master T1 or E1 digital service unit (DSU) and a remote fractional T1 or E1 DSU over a T1 or E1 line, said T1 or E1 line being governed by a frame comprised of a plurality of digital signal level zeros (DS0s) or time slots (TS0s), with a bundle of said plurality of DS0s or TS0s intended for said remote fractional T1or E1DSU, said method comprising:
- a) sending a priming sequence from said network managed master T1 or E1 DSU in at least one of the DS0s or TS0s of the DS0 or TS0 bundle intended for the remote fractional T1 or E1 DSU but not in the DS0s or TS0s of bundles which are intended for other DSUs, said priming sequence including a break signal followed by a signal which encodes at least an indication of the diagnostic channel for the remote fractional T1 or E1 DSU;
- b) at the remote fractional T1 or E1 DSU, identifying said break signal and said signal which encodes at least an indication of the diagnostic channel, and decoding said signal which encodes at least an indication of the diagnostic channel to identify the diagnostic channel for the remote fractional T1 or E1 DSU.
A network managed E1 or T1 telecommunications system which utilizes E1 or T1 telecommunication lines having frames incorporating a plurality of digital signal level zeros (DS0s) or time slot (TS0) signals, said E1 or T1 telecommunications lines being coupled to a telecommunications network, the system comprising:
- a) a network managed master digital service unit (DSU) coupled to one of the E1 or T1 telecommunication lines;
- and
- b) a first remote DSU coupled to one of the E1 or T1 telecommunication lines, wherein
- said network managed master DSU includes a first processing means for sending a priming sequence from said network managed master DSU in at least one DS0 or TS0 of a DS0 or TS0 bundle intended for said first remote DSU but not in the DS0 or TS0 bundles intended for other DSUs, said priming sequence including a break signal followed by a signal which encodes at least an indication of a diagnostic channel for said first remote DSU, and
- said first remote DSU included a second processing means for recognizing said break signal and for decoding said signal which encodes, such that said diagnostic channel is identified.
Dependencies are inferred from the claim text.