Transmission system having stand-by line switching facility

Details Transmission system having stand-by line switching facility Transmission system having stand-by line switching facility

1993-02-17

1996-11-19

Chin, Wellington

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Including fault responsive disconnection of tested component

379 1, 379 12, 379 15, 379 22, 379 25, 379 26, H04M 124, H04M 308, H04M 322

Patent

active

055770967

ABSTRACT:
A transmission system provides a stand-by line switching facility. The transmission system includes a plurality of working line side processing equipments and a stand-by line side processing equipment to replace one of the working line side processing equipments if a fault occurs therein. The transmission system has a first unit and second unit disposed for each working line side processing equipment. The first unit issues, upon receipt of a line switching command, a single line switching control signal. The second units commonly receive the single line switching control signal and respective line switching is performed between the faulty working line and the stand-by line simultaneously.

REFERENCES:
patent: 4365248 (1982-12-01), Bargeton
patent: 4442518 (1984-04-01), Morimoto
patent: 4451708 (1984-05-01), Kemler
patent: 4462058 (1984-07-01), Ziegler
patent: 4680776 (1987-07-01), Ikeuchi et al.
patent: 4829512 (1989-05-01), Nakai et al.
patent: 4831617 (1989-05-01), Iwasaki
patent: 4878048 (1989-10-01), Gottesman et al.
patent: 4996702 (1991-02-01), Gray
patent: 5001741 (1991-03-01), Sayer
patent: 5073774 (1991-12-01), Ikawa

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