Patents for H04W 84 - Network topologies (50,427)
09/1988
09/28/1988EP0283683A2 Portable wireless communication systems and method
09/27/1988CA1242537A1 Multiple access communications system
09/13/1988US4771448 Private cellular system
09/08/1988DE3706240A1 Method and radio paging system for selectively transmitting calls to mobile subscribers
09/07/1988EP0281150A2 A paging system
08/1988
08/31/1988EP0279817A1 Automatic exchange system for maritime radio telephone
08/30/1988US4768218 Radio key telephone system having a common signaling channel
08/23/1988CA1241067A1 Pager
07/1988
07/19/1988US4759016 TDMA communication system having common local path medium and local time slot for intraoffice calls
07/05/1988US4756018 Multiple access communication system having loop-check circuitry for switching intraoffice connections
06/1988
06/14/1988CA1238087A1 Queued community repeater communications systems
05/1988
05/31/1988US4748685 Remote squelch detect for use with a radio receiver
05/31/1988US4748655 Portable telephones
05/26/1988DE3639956A1 Radiotelephone
05/25/1988EP0268375A2 Private cellular system
05/03/1988CA1236165A1 Dispatch trunked radio system
04/1988
04/21/1988DE3735295A1 Verfahren zur uebermittlung von informationen in einem personenrufsystem Process for about communication of information in a paging system
04/12/1988US4737975 Programmable system for interfacing a standard telephone set with a radio transceiver
04/05/1988CA1234938A1 Duplex interconnect/dispatch trunked radio system
03/1988
03/29/1988US4734694 Pager
03/29/1988CA1234601A1 Cellular mobile radio service telephone system
03/15/1988US4731812 Installation with portable, wireless telephone sets
02/1988
02/25/1988WO1988001466A1 Automatic exchange system for maritime radio telephone
02/02/1988US4723264 Signalling method for establishing trunked communication
02/02/1988CA1232329A1 Communication system
01/1988
01/26/1988CA1232024A1 Multi-channel access (mca) radio telephone system
01/12/1988CA1231385A1 Mobile telephone system for automatically paging absent mobile subscriber
01/05/1988US4718108 Improved multiple site communication system
12/1987
12/29/1987US4716407 Trunked communication system true priority channel scan
12/29/1987CA1230929A1 Multiple frequency message system
12/17/1987EP0231259A4 Nationwide radio paging system.
12/15/1987US4713808 Watch pager system and communication protocol
12/08/1987US4712229 Multiple access radio telephone system selectively operating on full-duplex and half-duplex modes
12/01/1987EP0232418A4 Scanning receiver for nationwide radio paging system.
11/1987
11/24/1987US4709402 Method of synchronizing radio transmitters for synchronous radio transmission
11/24/1987US4709401 Method of setting radio transmitters for synchronous radio transmission
11/11/1987EP0245077A2 TDMA communication system having common local path medium and local time slot for intraoffice calls
11/11/1987EP0245024A2 Radio communication system with power saving disablement prior to call handling processes
11/04/1987EP0243900A2 Radio key telephone system having a common signaling channel
10/1987
10/20/1987US4701944 Signalling system for trunked private calls
10/19/1987EP0210181A4 Dispatch trunked radio system.
10/14/1987EP0241287A2 Communication network capable of automatically informing a subscriber of occurrence of an idle channel
10/14/1987EP0241228A2 Multiple access communication system having loop-check circuitry for switching intraoffice connections
10/13/1987US4700375 Battery charging, reset, and data transfer system
10/07/1987EP0240051A1 Radio communication system provided with beacon transmitters
10/06/1987US4698805 Console interface for a trunked radio system
09/1987
09/30/1987EP0239093A2 Multiple access radio telephone system selectively operating on full-duplex and half-duplex modes
09/15/1987CA1226927A1 Control of telecommunication switching systems
09/09/1987EP0235371A1 Paging system and control method therefor
09/09/1987EP0235195A1 Method for dynamically regrouping subscribers on a communications system
09/08/1987US4692945 Dispatch trunked radio system
08/1987
08/19/1987EP0232418A1 Scanning receiver for nationwide radio paging system
08/12/1987EP0231259A1 Nationwide radio paging system.
08/11/1987US4686671 Cellular communication system operable with transmission pathfault
07/1987
07/21/1987US4682367 Mobile radio communications system with join feature
07/01/1987EP0226610A1 Installation with portable, wireless telephone sets.
06/1987
06/23/1987US4675863 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
06/23/1987CA1223378A1 Multiple-access communications system
06/09/1987US4672658 Spread spectrum wireless PBX
06/09/1987US4672608 Multiple access communications system
06/09/1987US4672601 Duplex interconnect/dispatch trunked radio system
05/1987
05/20/1987EP0222308A2 Radio communication system having means for avoiding signal collision
05/19/1987CA1222079A1 Multiple access data communications controller for a time-division multiplex bus
05/19/1987CA1222078A1 Time-division multiplex communications control system
04/1987
04/28/1987US4661972 Mobile telephone system for automatically paging absent mobile subscriber
04/22/1987EP0219085A2 A spread spectrum wireless PBX
04/21/1987US4659878 Method and apparatus for interference free communications between a remote handset and a host subscriber unit in a Cellular Radio Telephone System
04/14/1987US4658435 Radio trunking system with transceivers and repeaters using special channel acquisition protocol
04/14/1987US4658096 System for interfacing a standard telephone set with a radio transceiver
04/13/1987EP0204813A4 Duplex interconnect/dispatch trunked radio system.
03/1987
03/31/1987CA1219915A1 Wide area coverage radio communications system and method
03/12/1987WO1987001537A1 Method for dynamically regrouping subscribers on a communications system
03/10/1987US4649567 Dispatch overdialing for inter-group and other added calling/called access to communications channels in a trunked radio communications system
03/10/1987US4649385 Electronic locating system for persons receiving telephone calls
03/04/1987EP0212761A2 Communications system
03/04/1987EP0211849A1 Pager system and communication protocol.
02/1987
02/24/1987US4646345 Automatic unit ID for quasi-transmission trunked systems
02/17/1987US4644347 Multiple frequency message system
02/12/1987WO1987001005A1 Scanning receiver for nationwide radio paging system
02/12/1987WO1987000994A1 Nationwide radio paging system
02/04/1987EP0210181A1 Dispatch trunked radio system.
01/1987
01/29/1987DE3621990A1 Device for supplying transceivers inside a vehicle
01/27/1987US4639914 Wireless PBX/LAN system with optimum combining
01/06/1987US4635285 Communication system with voice priority for remote stations
12/1986
12/30/1986US4633463 Radio communication system
12/23/1986CA1215746A1 General purpose data control terminal
12/17/1986EP0204813A1 Duplex interconnect/dispatch trunked radio system.
12/16/1986US4630263 Time-division multiplex communications control system
12/03/1986EP0110888B1 A cordless telephone system
12/02/1986US4626845 Subscriber validation system
11/1986
11/25/1986CA1214581A1 Ringing signal transmission system for radiotelephone system
11/20/1986WO1986006915A1 Installation with portable, wireless telephone sets
11/18/1986CA1214219A1 General purpose data control system
11/18/1986CA1214218A1 Paging network
10/1986
10/15/1986EP0197556A2 Synchronization method for radio transmitters in a local e.g. nationwide paging network
10/15/1986EP0128209B1 Method of setting radio transmitters for synchronous radio transmission
10/15/1986CN86100949A Subscriber rf telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of rf channels
09/1986
09/24/1986EP0195044A1 Radio trunking system with transceivers and repeaters using special channel acquisition protocol
09/17/1986EP0128210B1 Method and apparatus for synchronizing radio transmitters for synchronous radio transmission
09/16/1986US4612637 Multiple-access communications system