Matches 1 - 50 out of 54 1 2 >
Match Document Document Title
6804529 Trunked radio repeater communication system including home channel aliasing and call grouping  
A system for channel assignment in a trunked transmission communication system including a plurality of subscribers. A plurality of subscribers is provided home channel assignment to reduce...
6781963 Method and an apparatus for terminating a user from a group call in a group communication network  
A method and apparatus for terminating a member from a group call in a group communication network provides for receiving an indication from a user who wishes to terminate participation in a group...
6754197 Method and system for transmit data blocking in a wireless communications network  
Systems and methods to provide ordered transmission of data packets to multiple destinations are presented. A transmission device includes a transmitter, a data packet ordering unit, a state table,...
6751468 Systems and methods for providing push to talk feature for wireless communication systems  
Systems and methods are provided for allowing a first wireless unit and a second wireless unit to share a single communication channel including a transmit frequency and a receive frequency. The...
6738359 Communication format control method and apparatus  
A communication format control method is used in a mobile communication system which is capable of providing a communication service to a mobile station in each zone via a plurality of base...
6529486 Trunked radio repeater communication system  
A trunked radio repeater communication system capable of use in a networked system includes a plurality of distributive switches and a unique signaling protocol and a switching protocol for...
6519476 Radio communication system wherein insertion of an attachable external storage medium causes the mobile to interact with the system  
In a radio communication system, when an interconnection between radio terminal (PS) used for digital cordless telephones is performed, a connection destination terminal is discriminated in...
6480723 Communications interface adapter  
A communications interface adapter facilitates both wired and wireless communications between crew members of a vehicle having a wired intercom and has an intercom communications circuit having an...
6374115 Method and apparatus for trunked radio repeater communications with backwards compatibility  
A trunked radio repeater communication system capable of use in a networked system includes a plurality of distributive switches and a unique signaling protocol and a switching protocol for...
5867790 Radio communication system with enhanced connection processing  
In a radio communication system, when an interconnection between radio terminal (PS) used for digital cordless telephones is performed, a connection destination terminal is discriminated in...
5864762 Operating a trunked communication system in transmission and message trunked modes  
A digitally trunked radio repeater system provides substantial improvements in timeliness and reliability. The mobile radio transceivers transmit channel requests on the control channel at 9600...
5815799 Priority system for a wide area transmission trunked communication system  
A method and apparatus for providing priority access for users in a transmission trunked communication system, including a plurality of distributive radio network terminal (RNT) switches and a...
EP0505407B1 WIRELESS IN-BUILDING TELECOMMUNICATIONS SYSTEM FOR VOICE AND DATA COMMUNICATIONS  
Abstract not available for EP0505407 Abstract of corresponding document: WO9108629 A wireless in-building telecommunications system for voice and data communications is disclosed having at least...
5784388 Methods and apparatus for decoding control signals in dispatch trunked radio system  
A system for decoding encoded data from the control channel of a trunked dispatch system, and for detecting the presence of subaudible handshake data on an assigned voice channel of the trunked...
5724655 Method and apparatus for operating a communication unit consisting of multiple devices  
In a wireless communication system (100), a communication unit (102) may operate in the following manner. Upon initiation of a service request, the communication unit (102) transmits the desired...
5627876 Call priority override in a land mobile radio system  
A land mobile radio communication system has a plurality of cell sites, each of which typically has a plurality of repeaters. The over-the-air radio communications between the cell site repeaters...
5613196 Method and apparatus for a distributive wide area network for a land mobile transmission trunked communication system  
A land mobile transmission trunked communication system is provided with a unique switching protocol arrangement among repeaters that are networked to one or more external communication networks....
5574788 Trunked radio repeater system  
A digitally trunked radio repeater system provides substantial improvements in timeliness of channel acquisition and channel drop, and in reliability of critical control signalling. The system uses...
5568511 System and method for radio disconnect and channel access for digitized speech trunked radio systems  
In half-duplex, trunked digitized voice communications between mobile transceivers, the present invention minimizes time delays occurring after one transceiver ends a transmission and before other...
5548802 Method and apparatus for a remote network switch for a land mobile transmission trunked communication system  
A method and apparatus for distributively interconnecting a plurality of land mobile trunked transmission communication systems into a wide area network includes a plurality of distributive radio...
5548631 Method and apparatus for supporting at least two communication services in a communication system  
Apparatus and method for enabling a single communication system (100) to support at least two communication services. For example, one can support both cellular telephone services and trunked...
5544159 Duplex interconnect/dispatch trunked radio  
A subscriber unit for use with a duplex communication system is described. The present invention contemplates a duplex transceiver which incorporates data and voice handling capablity. A...
5524007 Network interface architecture for a packet switch communication system  
An improved network interface architecture for a packet switch provides for the combination of both voice and data in a single switch using a common packet structure. It allows for the dynamic...
5517505 Synchronization method and apparatus for a wireless packet network  
In a wireless TDMA network a control module (CM) sends a time stamp relative to the beginning of its frame in a synchronization packet allowing each of a plurality of user modules (UM) to maintain...
5517500 Packet handling method  
An improved network interface architecture for a packet switch provides for the combination of both voice and data in a single switch using a common packet structure. It allows for the dynamic...
5495482 Packet transmission system and method utilizing both a data bus and dedicated control lines  
A common communication controller is linked to a plurality of peripheral devices by a network interface bus. Packets containing information is communicated between the controller and the...
5493695 Trunking radio system with frequency diversity  
This invention relates to a trunking radio system (FIG. 1) having a central station and at least one remote station for communication with the central station over a number of frequency-divided...
5483670 Trunked radio repeater system with control channel monitoring feature  
A digitally trunked radio repeater system provides substantial improvements in timeliness of channel acquisition and channel drop, and in reliability of critical control signalling. The system uses...
5477541 Addressing technique for storing and referencing packet data  
A hierarchical addressing technique is employed in a packet communications system to enhance flexibility in storing and referencing packet information. This method permits packet message data and...
5475681 Wireless in-building telecommunications system for voice and data communications  
An improved network interface architecture for a packet switch provides a mechanism for handling voice and data packets. Bandwidth allocation can be changed because control and data memories are...
5450611 Fast channel access protocol for a two-way communication system  
Requesting (transmitting) subscriber units may immediately begin transmitting an information signal over an assigned communication channel. Receiving subscriber units immediately unmute their...
5440759 Modular networking switch system for a distributive wide area transmission trunked communication system  
A modular networking switch system for a land mobile transmission trunked communication system provides transmission trunked communications with a plurality of transceivers and networks the...
5430726 Repeater interface controller with a shared data bus  
A repeater interface controller receives a data packet at one of a plurality of port nodes from an associated segment of a local area network. The plurality of port nodes determine a priority port...
5408466 Duplex interconnect dispatch trunked radio  
A subscriber unit for use with a duplex communication system is described. The present invention contemplates a duplex transceiver which incorporates data and voice handling capability. A...
5396495 Hub management bus architecture for repeater interface controller  
The present invention is directed to various features of a repeater interface controller (RIC) that connects segments of a bus/tree local area network. In the described embodiment of the invention,...
5319635 Electronic duplex communication system  
A communication unit (10) transmits a first signal (12) that has a plurality of holes (44) therein during the occurrence of which another communication unit may interrupt. A repeater (14) receives...
5299195 Repeater interface controller with multiple port node interfaces  
A repeater interface controller receives a data packet at one of a plurality of port nodes from an associated segment of a local area network. At least one port node is configurable as either an...
5283546 Vandal-resistant call box  
A call box (201) provides vandal-resistant operation by using a concealed magnetic switch and magnet (179) and specially locked compartments (101 and 103) in a heavy duty structure. The concealed...
5261117 Method to allow a radio transceiver to automatically select from amongst multiple radio systems  
A method and means of automatically accessing several types of radio systems is described. The present invention allows a subscriber unit, which is normally operative in a operator selected radio...
5212685 Control circuit for half-duplex/simplex interface in communication system  
An interface circuit for connecting an electrical half-duplex system to an optical simplex system includes logic which permits keep-alive signals to be gated onto the transmitting simplex fiber...
5206863 Processor-to-processor communications protocol for a public service trunking system  
A downlink between a communications dispatch console and a digitally trunked radio repeater system site controller efficiently transfers message data between the site controller and the console...
5159695 Communication system to communication system communication system  
Independent communication systems are provided with additional receivers that allow the systems to monitor one another's outbound control signalling channels. Secondary control signalling can be...
5134714 Remote control of priority communications automatic  
A communication resource method is set forth that allows communication with a subscriber unit that is in a priority access mode. Either a communication resource allocator or a subscriber unit is...
5128930 Processor-to-processor communications protocol for a public service trunking system  
A downlink between a communications dispatch console and a digitally trunked radio repeater system site controller efficiently transfers message data between the site controller and the console...
5117423 Data transmission over a time division duplex channel  
A method of, and system for, data transmission over a time division duplex channel in which at least one duplex voice channel constituted by a pair of non-adjacent time slots (or physical channels)...
5091906 Quasi-duplex radio system using bi-directional hole extension  
A method for interrupting a radio transmission in a quasi-duplex radio-frequency communication system. The method of the present invention includes the step of transmitting a signal (22), with...
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...
4882751 Secure trunked communications system  
A trunked communications system that accommodates encrypted secure communications. The system uses both non-encrypted message detectors and encrypted message detectors to assure that the trunked...
4875231 Radio telephone system  
A radio telephone system includes a base station connected to a telephone exchanger and a plurality of mobile stations connected to the base station through a radio channel including a control...
4837858 Subscriber unit for a trunked voice/data communication system  
A trunked voice/data subscriber is provided that operates in either a voice mode, or one of three data modes. In a first data mode, the voice/data subscriber monitors the voice control channel to...
Matches 1 - 50 out of 54 1 2 >