Network system diagnosis system

Details Network system diagnosis system Network system diagnosis system

1987-10-01

1988-10-11

Schreyer, Stafford D.

Telegraphy

Systems

Line-clearing and circuit maintenance

34082305, 371 11, H04B 346

Patent

active

047773308

ABSTRACT:
A station diagnosis method in a communications network system including a closed ring transmission line and a plurality of data stations which can be connected to the ring transmission line by a plurality of line concentrators disposed in the ring transmission line wherein an internal ring transmission line is formed in the line concentrators so that the operation states of the line concentrators are diagnosed by transmitting diagnosis data through the internal ring transmission line.

REFERENCES:
patent: 4417242 (1983-11-01), Bapst et al.
patent: 4510493 (1985-04-01), Bux et al.
patent: 4542496 (1985-09-01), Takeyama et al.
patent: 4627055 (1986-12-01), Mori et al.

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