Communication system and method of detecting transmission faults

Details Communication system and method of detecting transmission faults Communication system and method of detecting transmission faults

1994-03-31

1996-03-05

Canney, Vincent P.

Excavating

371 27, G06F 1100

Patent

active

054973775

ABSTRACT:
A transmission system comprising a plurality of stations, each having transmission and receiving circuits, that are connected in a ring configuration and use a HDLC-type protocol for transmission. The fault of a transmission circuit in a station can be detected in an idle state time by transmitting a fixed bit pattern during an idle state of transmission. Each station has a fixed bit pattern generator for outputting a fixed bit pattern during an idle time. Each station also has fault detection means which detects a fault when it receives a signal other than transmission data and the fixed bit pattern. Since the state of a line can always be monitored, a fault of the line state can be rapidly identified. Since transmission data is not encoded, the data transmission can be conducted at a high speed.

REFERENCES:
patent: 5351245 (1994-09-01), Pregont et al.
patent: 5390199 (1995-02-01), Ajima et al.

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