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Match Document Document Title
7206592 System for coupling a multiplicity of RF data collection terminals with host computer means  
Improved apparatus for a radio communication system having a multiplicity of mobile transceiver units selectively in communication with a plurality of base transceiver units which communicate with ...
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...
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...
6320949 Method for duplicating calls of remote multiple subscribers  
A method and apparatus for duplicating a call of a remote subscriber system having an active processor and a standby processor. The method includes the steps of: checking whether a call is generate...
6161016 Broadcast channel seizure with allocated single traffic channel per occupied cell in a cellular system  
In a cellular radio system the facility is provided for a call to be broadcast from a control center (for example an emergency service controller), or from any mobile unit to all of the others. Eac...
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...
5966659 Service request rooting by a local resource controller  
A local resource controller (409) from among a plurality of local resource controllers, receives a service request sourced by a communication unit (411). The local resource controller (409) selects...
5943492 Apparatus and method for generating external interface signals in a microprocessor  
An apparatus for generating control signals of a microprocessor includes a memory, for example, a pattern holding register storing an arbitrary bit pattern. The holding register can be loaded by so...
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...
5754960 Display console and user interface for multisite RF trunked system  
A dispatcher console for use in a digitally trunked, multisite public service radio system. The dispatcher counsel comprises a personal computer having a co-processor logic board, an audio switchin...
5701582 Method and apparatus for efficient transmissions of programs  
A system and method of optimizing transmission of a program to multiple users over a distribution system, with particular application to video-on-demand for a CATV network. The system includes, at ...
5699353 Extended trunked RF communications systems networking  
In a trunked communications network, a multiple site information distribution control "switch" (multisite switch) provides access to digitized audio and control signals from various audio sources t...
5682148 Paging system with message numbering prior to transmission  
A paging system repeatedly broadcast each message and associates a sequential message number with each paging message. The message number in each message serves two functions. First, the message nu...
5675591 Reverse checksum method for telecommunication systems  
A method for synchronizing communication between a transmitting unit (102) and a receiving unit (104) in a telecommunication system (100) includes calculating a reverse checksum for the received da...
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...
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...
5566388 RF trunking multisite switch configuration and diagnostics interface  
In a multisite radio frequency (RF) signal transmission system, a multisite switch routes audio and data information throughout the system. This switch has a node through which a system manager and...
5535326 System and method for logical console verification and feedback  
A system and method for logical console verification and fallback. Conformity of physical equipment configurations with the logical console control and fallback plan is verified by sending messages...
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...
5479477 Method and apparatus for assigning a control module to a communication resource in a dispatch radio communication system  
A dispatch radio communication system (100) employs a method (200) and apparatus (101) for assigning one of a console station's control modules (113-115) to a communication resource. The assignment...
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...
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...
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...
5369783 Dynamic regrouping in a trunked radio communications systems  
In a trunked radio frequency communications system, a dynamic regrouping scheme includes an effective user interface, automatic support of multi-site systems, the capability to program individual r...
EP0358688B1 METHOD FOR DYNAMICALLY ALLOCATING DATA CHANNELS ON A TRUNKED COMMUNICATION SYSTEM  
Abstract not available for EP0358688 Abstract of corresponding document: US4870408 Disclosed is a method to dynamically allocate a number of data channels on a trunked radio system (100). The data...
5274838 Fail-soft architecture for public trunking system  
A site architecture for a trunked radio frequency communications system provides better fault tolerance capabilities than are available from architectures including redundant hardware. During norma...
5265093 Hardware interface and protocol for a mobile radio transceiver  
A system and method for communicating control signals between a digital mobile transceiver, a digital control head, and a mobile data terminal over a common serial peripheral bus uses a message pro...
5230078 Method for a console to quickly monitor a group  
In a communication system that comprises a plurality of communication groups, a plurality of transceivers, and a plurality of consoles which monitor selected communication groups, a console may qui...
5212724 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 ove...
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 ove...
5185604 Message indicating icon mechanism  
A paging system where messages are numbered before they are transmitted. The paging receivers in the system compare both the number and the text information in each message which is received to the...
5175866 Fail-soft architecture for public trunking system  
A site architecture for a trunked radio frequency communications system provides better fault tolerance capabilities than are available from architectures including redundant hardware. During norma...
5159701 Method and apparatus for a distributive wide area network 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 n...
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 ove...
5125102 Trunked radio repeater system including synchronization of a control channel and working channels  
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...
5117501 Dynamic regrouping in a trunked radio communications system  
In a trunked radio frequency communications system, a dynamic regrouping scheme includes an effective user interface, automatic support of multi-site systems, the capability to program individual r...
5109543 Hardware interface and protocol for a mobile radio transceiver  
A system and method for communicating control signals between a digital mobile transceiver, a digital control head, and a mobile data terminal over a common serial peripheral bus uses a message pro...
5086506 Radio trunking fault detection system with power output monitoring and on-air monitoring  
A trunked radio frequency (RF) repeater system for public service trunking (PST) or the like includes a fault detection system having an RF output power monitoring, over-the-air RF monitoring and o...
5077828 RF channel expansion in a trunked radio communications system  
In a trunked radio frequency communications system, an arrangement dynamically "expands" or extends the frequency allocation table stored within the "personality" defining non-volatile storage devi...
EP0435582A2 Supervisory control allocation method and apparatus.  
A communication system comprising a plurality of consoles and a plurality of communication resources wherein supervisory controls are assignable to the consoles. The supervisory controls comprise p...
5020132 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 ove...
4995095 Method and apparatus for utilizing unpresented communication groups  
In a communication system that comprises a plurality of communication resources, a plurality of consoles, a communication resource allocator, and a plurality of subscriber units arranged into a plu...
4939746 Trunked radio repeater system  
A digital 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 a...
4926496 Method and apparatus for infrequent radio users to simply obtain emergency assistance  
A digital mobile radio transceiver allows even the most unsophisticated user to simply and easily obtain emergency communications. The transceiver is programmed with "personality" data specifying o...
4905302 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...
4905234 Apparatus and method for transmitting digital data over a radio communications channel  
A digital radio RF signalling protocol communicates either digitized voice or digital data signals and indicates the type of information being communicated to the receiver. Multiple repeats of cont...
4903262 Hardware interface and protocol for a mobile radio transceiver  
A system and method for communicating control signals between a digital mobile transceiver, a digital control head, and a mobile data terminal over a common serial peripheral bus uses a message pro...
4870696 Mobile communications system capable of avoiding interference with control channel  
A mobile communications system having a fixed unit connected to a public telephone network by a subscriber line, and a portable unit connectable to the fixed unit by radio channels which comprise a...

Matches 1 - 50 out of 55 1 2 >