Multiplex communications – Fault recovery – Bypass an inoperative switch or inoperative element of a...
Patent
1995-12-26
1998-08-25
Safourek, Benedict V.
Multiplex communications
Fault recovery
Bypass an inoperative switch or inoperative element of a...
370223, 370907, 39518202, H04L 12437
Patent
active
057990018
ABSTRACT:
A composite network protective/recovering device includes first to fourth input/output (I/O) modules. The first and third I/O modules are operational modules and the second and fourth I/O modules are protective modules. A first span connection group connects the first I/O operational module with the second I/O protective module. A second span connection group connects the third I/O operational module with the fourth I/O protective module to perform span switching. A first bidirectional line switching ring connects the first I/O operational module and the third I/O operational module to form a bidirectional ring which has two lines in each direction. A second bidirectional line switching ring is connected to the first to fourth I/O modules to form transmitting/receiving operational lines which include two lines in each direction and protective lines which include two lines in each direction. Cross-connection (DXC) module performs cross-connecting function between signals which are transferred through the I/O modules and classifies signals to be added or dropped.
REFERENCES:
patent: 4951280 (1990-08-01), McCool et al.
patent: 5475676 (1995-12-01), Takatori et al.
patent: 5537393 (1996-07-01), Shioda et al.
patent: 5544151 (1996-08-01), Baek et al.
Kim Ho Geon
Kim Jae Guen
Lee Dong Choon
Lee Ho Jae
Electronics and Telecommunication Research Institute
Jing Min
Korea Telecommunications Authority
Safourek Benedict V.
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