Multiplex communications – Fault recovery – Bypass an inoperative channel
Patent
1996-01-30
1999-12-28
Ton, Dang
Multiplex communications
Fault recovery
Bypass an inoperative channel
H04J 116
Patent
active
060090766
ABSTRACT:
A communications system has two transmission circuits, each transmitting a multiplexed signal in both ways. A repeating installation used therein selects either one of the two transmission circuits and terminates management information contained in a signal which flows through a transmission circuit selected by the selecting unit. The repeating installation sets the other non-selected transmission circuit to be in a high impedance state. The selection and termination are commonly performed for the two transmission circuits, and the repeating installation further extracts the management information transmitted and outputs the management information to be outputted. The management information includes a section overhead having management information concerning a repeating section of the communications system, and the repeating installation does not terminate management information concerning a multiplex section. One of the two transmission circuits includes a spare transmission circuit.
REFERENCES:
patent: 5130837 (1992-07-01), Kitamura et al.
patent: 5179548 (1993-01-01), Sandesara
patent: 5216666 (1993-06-01), Stalick
patent: 5274496 (1993-12-01), Fujiwara et al.
patent: 5479396 (1995-12-01), Kusano
patent: 5515360 (1996-05-01), Hesse
patent: 5533006 (1996-07-01), Uchida
Echizenya Toshihito
Nakamura Yoshinori
Ohara Katsuichi
Takatsu Kazuo
Yamamoto Kanta
Fujitsu Limited
Ton Dang
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