Multiplex communications – Fault recovery – Bypass an inoperative channel
Patent
1994-12-13
1996-12-17
Kizou, Hassan
Multiplex communications
Fault recovery
Bypass an inoperative channel
370221, H04J 314, H04L 1226, H04L 2914
Patent
active
055861121
ABSTRACT:
A plurality of crossconnect systems are respectively arranged at branch points of a network transmission line system. Each of the crossconnect systems includes a first setting unit, a second setting unit, and a checking unit. The first setting unit sets a primary transmission route of the network transmission lines. The second setting unit automatically searches for and sets an alternate route when a fault is detected in the primary transmission route set by the first setting unit. The checking unit checks the operation of each transmission line according to a predetermined timing.
REFERENCES:
patent: 5058105 (1991-10-01), Mansour et al.
patent: 5182744 (1993-01-01), Askew et al.
patent: 5218601 (1993-06-01), Chujo et al.
patent: 5241534 (1993-08-01), Omuro et al.
patent: 5319632 (1994-06-01), Iwasaki
patent: 5329520 (1994-07-01), Richardson
"Synchronous Optical Network (SONET) Transport Systems: Common Generic Criteria", (Incremental Proposed Requirements to TR-NWT-000253, Issue 2), Technical Advisory, TA-NWT-000253, Issue 8, Oct. 1993, total 28 pages.
Kizou Hassan
NEC Corporation
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