Monitoring circuit for time-division switching network

Details Monitoring circuit for time-division switching network Monitoring circuit for time-division switching network

1979-11-20

1981-11-24

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 14, H04J 314

Patent

active

043028365

ABSTRACT:
A circuit for monitoring the operation of a time-division switching network, in particular, a circuit for checking the continuity of the switching network speech paths during actual communications.
The circuit includes a plurality of monitoring Groups (I, II . . . N) which operate simultaneously under the control of a microprocessor. Each monitoring group is connected to all the incoming trunks via a synchronization and multiplexing circuit and to selected ones of the outgoing trunks, via a multiplexing circuit.
The invention is applicable to telephone exchanges.

REFERENCES:
patent: 3937935 (1976-02-01), Le Pabic
patent: 3980833 (1976-09-01), Calcagno et al.
patent: 4163122 (1979-07-01), de Goede
patent: 4208552 (1980-06-01), Castriotta et al.

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