Duplex system of transmission lines in a loop network

Details Duplex system of transmission lines in a loop network Duplex system of transmission lines in a loop network

1988-12-19

1990-05-29

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

34082501, 34082505, 340 827, H04J 314

Patent

active

049301195

ABSTRACT:
Disclosed is a duplex system of transmission lines in a loop network applied, for example, to a local area network. To realize an autonomous recognition of transmission line faults by each communication node and to enable a rapid and automatic reconstruction of a network, each communication node comprises a loop back circuit for effecting a loop back operation in response to a predetermined state of signals received from two directions of the duplex loop lines, and a return indication circuit for adding, to a transmitted signal a return indication that a received signal was returned when the received signal could not be passed through the node.

REFERENCES:
patent: 4530085 (1985-07-01), Hamada et al.
patent: 4542496 (1985-09-01), Takeyama et al.
patent: 4593154 (1986-06-01), Takeda et al.
patent: 4704714 (1987-11-01), Tomizawa et al.
patent: 4831617 (1989-05-01), Iwasaki
patent: 4835763 (1989-05-01), Lau

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