System for correlating RF usage in a trunked communication netwo

System for distributing radio telephone signals over a cable tel

System for integrating a cellular telephone with a vehicle secur

System for interconnecting electronic mail systems by RF communi

System for interfacing a standard telephone set with a radio tra

System for interfacing a standard telephone set with a radio tra

System for interfacing a standard telephone set with a radio tra

System for locating and communicating with mobile vehicles

System for programming of features of a mobile cellular telephon

System for providing automatic voice messaging in a digital netw

System for rewriting information in rewritable memory provided i

System for routing calls to mobile subscribers

System for securing mobile telephones from unauthorized transmis

System for transferring information from a RF receiver to a proc

Systems and methods for prioritized routing of telephone calls t