System and method of automatic call barring in a radio telecommu

Details System and method of automatic call barring in a radio telecommu System and method of automatic call barring in a radio telecommu

1996-05-06

1999-11-02

Chin, Wellington

Telecommunications

Radiotelephone system

Security or fraud prevention

455433, 455435, H04Q 734

Patent

active

059786701

ABSTRACT:
A system for reducing fraudulent use of a mobile telephone number in a radio telecommunications network. The system automatically bars call originations from the mobile telephone if the mobile telephone does not register with the network for a predetermined time period, or if the mobile telephone does not originate a call for a second predetermined time period. The system determines when a mobile telephone originates a call, measures a predetermined time period with a timing mechanism, and starts the timing mechanism when the mobile telephone originates a first call. The system then determines whether a second call originated from the mobile telephone during the predetermined time period and restarts the timing mechanism at the time that the mobile telephone originates a second call upon determining that the second call originated from the mobile telephone during the predetermined time period. The system reauthorizes the mobile telephone to originate calls in the network upon verification of a personal identification number entered by the subscriber.

REFERENCES:
patent: 4955049 (1990-09-01), Ghisler
patent: 5335265 (1994-08-01), Cooper et al.

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