Comprehensive automatic mobile radio telephone system
Automatic call transfer system capable of carrying out call transfer without manual operation
Cellular mobile radio credit card system
Radiotelephone credit card data communications
Method of supervising mobile telephone subscriptions in a mobile telephone system
Customer activation system
Arrangement for identifying subscribers
Secure over-the-air registration of cordless telephones
Service provision authentication protocol
ApplicationNo. 816602 filed on 12/31/1991
US Classes:380/248, Visiting center340/5.74, Access to electrical information375/130, SPREAD SPECTRUM380/29, NBS/DES algorithm380/30, Public key380/34, Plural carrier frequencies455/410, Security or fraud prevention455/411Privacy, lock-out, or authentication
ExaminersPrimary: Gregory, Bernarr E.
International ClassesH04L 009/32
AbstractAn improved mobile telephone system, including a process and apparatus for detecting fraudulent requests for roamer cellular telephone services before the requested service is granted. The improvement comprises a distributed, readily updatable fraud prevention processor which facilitates a plurality of independent, geographically dispersed cooperating cellular networks to each locally determine if a roamer request for service is from a valid, currently authorized user subscriber before cellular telephone service is provided by the visited cellular network.