Call-disposition analyzer

Details Call-disposition analyzer Call-disposition analyzer

1992-03-19

1994-03-01

Chin, Stephen

Telephonic communications

With usage measurement

Call charge metering or monitoring

379120, 379119, 379130, 379140, H04M 1516, H04M 1528

Patent

active

052915476

ABSTRACT:
A call-disposition analyzer (10) for determining whether calls placed by way of a private branch exchange (PBX) (12) have been completed employs current sensors (22) to monitor the trunk lines (16) that the PBX (12) uses. It thereby records the telephone numbers dialed over the trunk lines (16). It also detects supervisory and voice signals on the trunk lines (12) so as to determine of the call's disposition--i.e., typically, so as to determine whether the call went through successfully. It stores in a memory (60) the call-disposition estimate and tags it with the telephone number that was dialed to make the call. Subsequently, when the PBX (12) transmits a station-message data record (SMDR) for that call, the call-disposition analyzer (10) scans the record for a sequence of digits that match or nearly match any of the telephone numbers that it has stored, and it either forwards that SMDR to a call-accounting system (20) or withholds the SMDR in accordance with the call-disposition estimate tagged with the telephone number that matches or nearly matches a sequence in the SMDR. The call-disposition analyzer thus does not require information concerning the specific internal arrangement of the SMDR format that the PBX employs.

REFERENCES:
patent: 4270024 (1981-05-01), Theis et al.
patent: 4825465 (1989-04-01), Ryan
patent: 5048079 (1991-09-01), Harrington et al.
patent: 5138658 (1992-08-01), Carter et al.

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