Loop network

Details Loop network Loop network

1986-09-17

1988-10-18

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

34082505, 370 86, H04J 300

Patent

active

047792612

ABSTRACT:
The present invention relates to a loop network arranged by loop-connecting a control station and a number of substations through a main transmission path where at least one of the substations comprises a branch station inserting and coupling another station into the main transmission path as a lobe or subloop. In order to prevent an out-of-step condition of the main transmission path, resulting from a failure in the lobe or subloop, the branch station includes a frame buffer for normally selecting the signal from the lobe or subloop and selecting the signal from the main transmission path during detection of a failure and on a bypass command, and for accumulating the selected signal in units of a single frame, and a mechanism for supplying the accumulated signal to the main transmission path.

REFERENCES:
patent: 3755789 (1973-08-01), Collins
patent: 3879582 (1975-04-01), White et al.
patent: 4680756 (1987-07-01), Sugimoto et al.

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