H - Electricity – 04 – L
Patent
H - Electricity
04
L
340/73
H04L 1/00 (2006.01) H04L 12/437 (2006.01)
Patent
CA 1245737
LOOP TRANSMISSION SYSTEM HAVING AUTOMATIC LOOP CONFIGURATION CONTROL MEANS ABSTRACT OF THE DISCLOSURE A token-passing type loop transmission system including a plurality of node stations and first and second loop transmission lines, which lines transmit signals in opposite directions. Each node station includes a first and second circuit and a ring control circuit. The ring control circuit monitors signals passing through the node station, changes end paths in the first and second loop-back circuits to operatively connect the first and second loop transmission lines or to restore the first and second loop transmission lines in a normal state in each loop-back circuit, and trans- mits a signal on the first or second loop transmission line through the first or second loop-back circuit. By the combination of operations of the plurality of node stations, the loop transmission system performs automatic loop configuration control of detection of a fault point therein and constructs a transmission loop line not including the fault point.
486442
Fujitsu Limited
Mcfadden Fincham
LandOfFree
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