Matches 51 - 70 out of 70 < 1 2
Match Document Document Title
5077790 Secure over-the-air registration of cordless telephones  
A method for registration of a portable unit that may be utilized in a communication system that comprises a network controller, having a data base for storing portable identification numbers, a...
5070521 Method and apparatus for call source identification  
Calls made to a communication unit from the telephone network include a code which can be appended as a predetermined prefix or suffix to the units address code, for alerting the operator that the...
5029233 Radio arrangement having two radios sharing circuitry  
A radio arrangement and method allows a portable (210) and a mobile (212) to uniquely communicate on a radio system having at least one remote system site (114). The portable (210) has at least one...
5025254 Communication system with improved resource assignment  
A trunked communication system wherein some of the communication resources are preassigned for exclusive use only by a predetermined group, such as a public safety agency. In addition, to assure...
5023930 Booster with detectable boost operation  
An apparatus and method for selecting a number of cellular radio channels to be boosted in a given geographical area provides either F1-F1 or F1-F2 operation. The signals can be boosted at the same...
5020130 Universal frequency assignment protocol for trunked radio systems  
A trunked communication system wherein channel assignment information is provided to a requesting subscriber unit in a dual word format that includes separate and specific information regarding...
4991198 Interconnection control method in cordless telephone system  
An interconnection control method in a cordless telephone system having a connection unit connected to a subscriber line and a plurality of radio telephone sets connected through a radio...
4972460 Automatic equivalent temporary talkgroup assignment in a roaming trunking environment  
A trunked communication system utilizes talkgroup synchronization for roaming communication units. By automatically matching the communication unit's talkgroup in a first area-wide system with an...
4955049 Method of supervising mobile telephone subscriptions in a mobile telephone system  
A method of supervising the subscribers in a mobile telephone system to detect audulent use of a mobile telephone. A fraudulent subscriber (MS2) can have the same identification number (12) as that...
4941200 Booster  
An apparatus and method for selecting a number of cellular radio channels to be boosted in a given geographical area provides either F1-F1 or F1-F2 operation. The signals are be boosted at the same...
4879740 Wide area cordless telephone system having means for avoiding double registrations  
A wide area cordless telephone system covers a service area which is divided into a plurality of local areas to each of which belong a plurality of home position cordless telephones having...
4852148 Radio telephone system  
A radio telephone system has a radio telephone set which has a receiving circuit the power of which is turned on or off in predetermined cycles, a radio connector transmit an ID number of the radio...
4843622 Communication control system capable of searching a called telephone set in a mobile radio telephone network  
For use in a mobile radio telephone network including radio telephone sets movable in an area divided into a predetermined number of zones, a communication control system includes a searching...
4833701 Trunked communication system with nationwide roaming capability  
Selected regional trunking systems are equipped with telephone interconnect capability and provided with local computers (106), which communicate with a national hub computer (110). At each...
4817126 Call box  
A communication system having a base station and a number of field units employs a virtual hold technique and a self-testing technique. In the virtual hold technique, when a field unit is put on...
4768219 Cordless telephone  
A multichannel access cordless telephone has a base unit and a handset unit which, in a standby mode, each independently scan a plurality of communication channels to detect interference thereon...
4768218 Radio key telephone system having a common signaling channel  
In a radio key telephone system connected through N subscriber lines to a telecommunication switching system, each of M (where M is larger than N) terminal stations has a multiple access radio...
4750198 Cellular radiotelephone system providing diverse separately-accessible groups of channels  
A cellular radiotelephone system including plurality of channels with a mechanism for dividing the channels into two diverse sets based on a division of the control channels used to transmit...
4737975 Programmable system for interfacing a standard telephone set with a radio transceiver  
A programmable interface system for interfacing a standard telephone set with a radio transceiver as part of a telephone network is provided. The radio transceiver may be a conventional...
4689812 Cordless telephone  
A cordless telephone having a fixed unit and a portable unit which are capable of exchanging an identification (ID) signal assigned to the telephone with each other is disclosed. The portable unit...
Matches 51 - 70 out of 70 < 1 2