Telecommunications fraud detection scheme

Details Telecommunications fraud detection scheme Telecommunications fraud detection scheme

1993-09-22

1996-04-02

Hofsass, Jeffery A.

Telephonic communications

Call or terminal access alarm or control

Fraud or improper use mitigating or indication

379 6, 379188, H04M 166

Patent

active

055048102

ABSTRACT:
Methods and apparatus are disclosed for providing increased security in a telecommunications network by using quasi-time domain reflectometry techniques to identify those telephone calls which comprise multiple legs. Echo data are collected for the telephone call from a predetermined point in the network to a point where the call originated. The data are processed to generate an indication of whether the telephone call comprises multiple legs, thus identifying those calls most susceptible to unauthorized use. The indication that a telephone call comprises multiple legs is advantageously used together with call attribute information, such as whether the call is placed to an international destination, to determine whether a given multiple-leg call is most likely a valid access to the communication system or most likely fraudulent.

REFERENCES:
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patent: 4182934 (1980-01-01), Keys et al.
patent: 4284851 (1981-08-01), Schweitzer et al.
patent: 4467148 (1984-08-01), Stafford et al.
patent: 4885767 (1989-12-01), Therrien
patent: 5357564 (1994-10-01), Gupta et al.

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