Defective short holding-time trunk identifying method

Details Defective short holding-time trunk identifying method Defective short holding-time trunk identifying method

1981-06-08

1983-02-01

Robinson, Thomas A.

179 71R, 179 8A, 179 27G, H04M 322, H04M 336, H04M 1500, H04M 1538

Patent

active

043717586

ABSTRACT:
A method is disclosed for automatically detecting a trunk that is likely to be defective even though it passes operational tests incident to switching it into service. In a telephone system, such a trunk might, for example, be so noisy or ineffective for transmission that customers cannot communicate over that trunk. Resultingly, the trunk is likely to handle a much higher than normal number of calls with short holding times since the customers quickly discover that they cannot communicate and terminate the calls. The method is implemented via telephone call processing, memory lists, and a program routine integrated into the call disconnect sequences. It allows such defective trunks to be identified by the steps of: detecting all calls with short holding times, successively processing trunk identities which have a repetition of such short holding-time calls, and alerting the maintenance force when such trunks have been processed through several memory lists.

REFERENCES:
patent: 3492445 (1970-01-01), Lecoanet
patent: 3760114 (1973-09-01), Morton et al.
patent: 4165447 (1979-08-01), Bertoglio et al.
patent: 4319090 (1982-03-01), Gatewood et al.

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