Apparatus for testing and sparing linecard equipment in a teleco

Details Apparatus for testing and sparing linecard equipment in a teleco Apparatus for testing and sparing linecard equipment in a teleco

1989-11-20

1991-03-19

Schreyer, Stafford D.

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Of centralized switching system

379 15, 379 27, H04Q 120, H04M 326

Patent

active

050017411

ABSTRACT:
Each wire of a subscriber's line is connected to its associated input of a subscriber's line unit by two interconnected relay contact sets. The relay contact sets are also connected to test busses. If a subscriber's line unit becomes faulty, a spare subscriber's line unit can be switched in to replace the faulty unit. The connection path is made by way of the test busses and the relay contact sets associated with the respective units. Test access paths may also be provided from the busses to the units.

REFERENCES:
patent: 4393491 (1983-07-01), Ashlock et al.
patent: 4451708 (1984-05-01), Kemler et al.

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