Matches 1 - 50 out of 84 1 2 >
Match Document Document Title
7228130 Method for preventing an unauthorized device from operating in an 800 MHz trunked radio communications system using channels 319 to 0  
A receiving device in a trunked radio communications system determines a transmit frequency, wherein the transmit frequency is calculated by subtracting a voice channel number from 319, multiplying...
7171213 Method for operating in a 800 MHz trunked radio communications system for channels 440 to 559  
A receiving device in a trunked radio communications system determines a transmit frequency, wherein the transmit frequency is calculated by subtracting 440 from a voice channel number, multiplying...
7136664 Method for determining a control channel in a trunked radio communications system utilizing a scan list  
A receiving device in a trunked radio communications system retrieves a first frequency from a scan list and tunes to about the first frequency. If no control channel messages are decoded at the fi...
7096013 Method for operating in an 800 MHz trunked radio communications system by mapping channels to frequencies  
A receiving device in a trunked radio communications system determines transmit and receive frequencies by a mapping. The receiving device receives a voice channel number, wherein the voice channel...
7089026 Method for determining a control channel in a trunked radio communications system  
A receiving device in a trunked radio communications system retrieves a first frequency, wherein the first frequency relates to a lowest frequency that the at least one repeater utilizes for transm...
7085573 Method for operating in a 800 MHz trunked radio communications system for channels 0 to 119  
A receiving device in a trunked radio communications system requests a voice channel for a communication and receives an outbound signaling message on a control channel comprising a voice channel n...
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 collisi...
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 interco...
6519239 Method and apparatus for providing dispatch service in a CDMA communication system  
The present invention addresses the need for an apparatus and method for providing dispatch group and individual call services on a CDMA communication system. Generally, the present invention discl...
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 interco...
6301263 Method and apparatus for providing fair access in a group communication system in which users experience differing signaling delays  
A method and apparatus for providing fair access to members of a group communication system in which the members experience differing signaling delays. Members of the communication system send a tr...
6185430 Voice call group function for a satellite based air traffic control system  
Voice call group functionality is provided in a satellite based air traffic control system to allow air traffic controllers and pilots of one or more aircraft to establish and maintain voice commun...
6122483 Method and apparatus for multicast messaging in a public satellite network  
A satellite communication system provides multicast messaging services to subscriber units. Upon receipt of a multicast communication page from a satellite communication system network, a subscribe...
6097942 Method and apparatus for defining and updating mobile services based on subscriber groups  
New services and/or new subscribers are efficiently and flexibly defined and added to a mobile communications network using service groups and service group identifiers. One or more groups of mobil...
6073007 Wireless fleet communications system for providing separable communications services  
A method and apparatus for providing personal and business mobile wireless communications service is described. A message is received having a message type. Message separability and cost allocation...
5999820 Dispatch console having communication modules with caller tracking feature  
A dispatch console for a radio system is disclosed, where the radio system includes an audio switching tower which routes audio communications between a switching device and audio input/output devi...
EP0568659B1 METHOD OF ASSIGNING A VOICE/DATA CHANNEL OR A TEMPORARY CONTROL CHANNEL  
Abstract not available for EP0568659 Abstract of corresponding document: WO9310600 A method is employed by a central controller of a radio communications system, which method provides for sustaini...
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 bps...
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 uniq...
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 dis...
5774786 Method of maintaining calls subsequent to a site controller failure  
The present invention provides a method of maintaining calls subsequent to a site controller failure. A site controller broadcasts call information to a plurality of standby repeaters. The standby ...
5761193 Method for pre-establishing communications in a wireless communication network  
Network access delays are minimized by using affiliation messages to pre-establish communications in a wireless communication network (100). In a first embodiment, connections between a site and a ...
5710978 Logging recorder system for trunking radio  
A logging recorder system for trunking radio includes a device which monitors a plurality of channels of the trunking radio system and outputs analog signals representative thereof. A digitizer is ...
EP0530199B1 A METHOD FOR AUTOMATICALLY EXECUTING SYSTEM RECONFIGURATIONS  
Abstract not available for EP0530199 Abstract of corresponding document: WO9114278 In a communication system (100) having a communication resource allocator (102), a plurality of communication uni...
5649286 Method for managing the registration of a wireless unit  
A method for managing the registration of a wireless communication unit in a wireless communication system serving a geographic area divided into cells. Each cell transmits a unique identification ...
5646606 Transmission of transmitter parameters in a digital communication system  
In a system for transmitting digital information, transmitter operating parameters (503) are transmitted with other communication message information (501, 505, 507, 509, 511, 513, 515, and 517) to...
5625890 Logging recorder system for trunking radio  
A logging recorder system for trunking radio includes a device which monitors a plurality of channels of the trunking radio system and outputs analog signals representative thereof. A digitizer is ...
5625887 Method for non-registered communication units to access a communication system  
A method for a non-registered communication unit to access a communication system consists of sending a service request. Upon receiving a service request, the communication resource allocator assig...
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. T...
EP0547156B1 METHOD AND APPARATUS FOR ESTABLISHING VOICE AND TONE SIGNALLING COMMUNICATION IN A TRUNKED SYSTEM  
Abstract not available for EP0547156 Abstract of corresponding document: US5203011 A communication system (100) is provided comprising a communication resource controller (110) wherein the likelih...
5588042 Interactive roamer contact system for cellular mobile radiotelephone network for automatically initiating a communication with an autonomously registering cellular mobile radiotelephone  
An automated interactive customer class identification and contacting system for use in or for a cellular mobile radiotelephone (CMR) system. A mobile radiotelephone provides identification informa...
5574976 System for scanning channels  
A communication system has a PCC 101 which receives a data stream from a cordless base station 115. The cordless base station 115 transmits an indication in the data stream that it is going to begi...
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...
EP0395092B1 Mobile telephone system  
Abstract of EP0395092 On-board equipment for a mobile telephone system has a function of reporting the degree of busyness of message channels available in a service area. While the equipment is in...
5551062 Method for enhancing communication access in a radio communication system  
A multi-site communication system (100) includes a plurality of communication units ( 112-117), a central controller (101) for coupling a plurality of communication sites (106-108), and a site cont...
EP0446318B1 AUTOMATIC EQUIVALENT TEMPORARY TALKGROUP ASSIGNMENT IN A ROAMING TRUNKING ENVIRONMENT  
Abstract not available for EP0446318 Abstract of corresponding document: US4972460 A trunked communication system utilizes talkgroup synchronization for roaming communication units. By automatical...
5517677 Adaptive weighting of a scanning sequence  
A scanning technique that is preferential as to communication channels actually utilized in the past. A programmable queue is written with a communication channel identity code based on a predefine...
5513381 Method for placing a communication group call in a multiple site trunked system  
In a multi-site trunked communication system, a method for allowing a communication unit to place a unit directed group call consists of identifying, by the unit initiating the communication, a tar...
EP0398911B1 TRUNKED COMMUNICATION SYSTEM WITH NATIONWIDE ROAMING CAPABILITY  
Abstract not available for EP0398911 Abstract of corresponding document: US4833701 Selected regional trunking systems are equipped with telephone interconnect capability and provided with local co...
5483673 Method and apparatus for providing access to a communication system  
Communication units are provided access to a communication system (100) in the following manner. A base station (202) receives, from a requesting communication unit, a request, via a shared inbound...
5481545 Conventional network interface for multisite RF trunking system  
A gateway between a non-trunked ("conventional") RF communication system and digitally trunked RD communication system maps between trunked group IDs and non-trunked subaudible signalling tone freq...
5471646 Method for establishing a user defined radio talk group in a trunked radio communication system  
A method is provided for a group of radios to establish a talk group in order for the radios to communicate with each other. The method allows for a group of radios (200) to select a talk group whi...
5465386 Signaling protocol for a distributive wide area transmission trunked communication system  
A land mobile transmission trunked communication system is provided with an enhanced control signal protocol. The land mobile transmission trunked communication system includes a plurality of trans...
5442809 Method of assigning a voice/data channel as a temporary control channel in a radio communications system  
A method is employed by a central controller of a radio communications system, which method provides for sustaining a predetermined level of communication service. The system includes a plurality o...
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 plurali...
5428823 Method for a communication unit to access and utilize information from an allocator  
In a communication system, a communication unit may access increased information in the following manner. The communication unit transmits an information access request to the communication resourc...
5408680 Single channel autonomous digitally trunked RF communications system  
A single channel autonomous trunking ("SCAT") RF repeater transmits and receives on a single duplex RF channel. The repeater operates alternately in a control channel mode and in an assigned channe...
5371492 Method and apparatus for automatically executing system reconfigurations  
In a communication system having a communication resource allocator, a plurality of communication units, a plurality of communication resources, and at least one console, the communication resource...
5361402 Test device for analyzing communication channels in a trunked radio system  
A test device (101) for use in a trunked radio system (102) employs a received signal strength indicator (RSSI) detector (120) to analyze transmission parameters. The test device (101 ) includes a ...
5313652 Method and apparatus for providing a communication path using common sites  
A method of collapsing a communication path among at least two communication units (104-107) reduces the number of sites normally required to provide a communication. Each of a plurality of site co...

Matches 1 - 50 out of 84 1 2 >