Diagnostic method of equipment and system using the same

Details Diagnostic method of equipment and system using the same Diagnostic method of equipment and system using the same

1988-01-05

1989-08-15

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 13, H04J 314

Patent

active

048582247

ABSTRACT:
In a digital switching equipment or a digital cross-connect equipment including a plurality of receiving circuits, a multiplexer, a time division switch, a demultiplexer, and a plurality of transmitting circuits, each of the receiving circuits or the multiplexer has a circuit to insert a specific sequence into filling time slots of a plurality of subhighways of a highway having a plurality of time slots and each of the transmitting circuits and the demultiplexer has a circuit to detect the specific sequence inserted into the filling time slots such that when either one of the error detect circuits detects an error, a route change of the filling time slots is accomplished by means of a time division switch so as to predict a location of occurrence of a failure depending on a change in a detection state of the error detect circuits in association with the route change.

REFERENCES:
patent: 3909562 (1975-09-01), Lager
patent: 4266293 (1981-05-01), Amderson et al.
patent: 4302836 (1981-11-01), Bouvier d'Ivoire et al.
"Digital Synchronous Terminal System for Inter-City Network: Series 2", pp. 95-106 of the Japanese Periodical Shisetsu (Facilities) vol. 33, No. 11.
"Digital Exchange Method", Directed by Chiba, The Institute of Electronics and Communication Engineers of Japan, pp. 42-44 (1986).

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