| Patents for H04L 1 - Arrangements for detecting or preventing errors in the information received (103,402) |
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| 08/09/1989 | EP0327101A2 Satellite communication system with variable coding rate |
| 08/08/1989 | US4856090 Light communication equipment |
| 08/02/1989 | EP0325839A2 Method and apparatus for transmitting data packets from a plurality of stations in a time division multiplexed communication system |
| 08/01/1989 | US4853944 Digital AM/FM/φM demodulator |
| 08/01/1989 | US4853686 Method and apparatus for establishing a connection in shortwave radio networks |
| 08/01/1989 | CA1258130A1 Cmi signal transmission system |
| 07/27/1989 | DE3800977A1 Digital signal transmission system with line substitution operation |
| 07/26/1989 | EP0325078A1 Mechanism for error detection and reporting on a synchronous bus |
| 07/26/1989 | EP0324886A1 Control flow reduction in selective repeat protocols |
| 07/25/1989 | US4852127 Universal protocol data receiver |
| 07/25/1989 | US4852122 Modem suited for wireless communication channel use |
| 07/25/1989 | US4852103 Code error detecting circuit |
| 07/25/1989 | US4852097 Method for forming data block protection information for serial data bit sequences by means of cyclical binary codes |
| 07/25/1989 | US4852084 Information transmission system |
| 07/25/1989 | US4852082 Circuit arrangement for testing the operability of the data transmission facility |
| 07/19/1989 | CN1034104A Synchronizing and error control method and equipment for multi-channel long distant serial synchronous telecommunications |
| 07/18/1989 | US4850045 Method and apparatus for testing fiber optic hubs |
| 07/18/1989 | US4849990 Digital communication system |
| 07/18/1989 | CA1257665A1 Multilevel modulator comprising a compact error correcting code producing unit |
| 07/18/1989 | CA1257655A1 Cellular telephone data communication system and method |
| 07/13/1989 | WO1989006410A1 Acknowledge back pager with apparatus for controlling transmit frequency |
| 07/12/1989 | EP0323606A2 Decoding method and device with erasure detection for multilevel transmission systems |
| 07/11/1989 | CA1257353A1 System for transmitting words that are protected by a combination of a block code and a convolution code, transmitter device for use in such system and receiver device for usein such system |
| 07/11/1989 | CA1257339A1 Antenna diversity reception system for eliminating reception interferences |
| 07/04/1989 | US4845504 Mobile radio network for nationwide communications |
| 06/28/1989 | EP0321837A2 Data pattern synchronizer |
| 06/27/1989 | CA1256506A1 Method and apparatus in radio reception for avoiding storing a message more than once |
| 06/27/1989 | CA1256503A1 Modem for use in multipath communication system |
| 06/21/1989 | EP0320968A2 Spare channel monitor circuit |
| 06/21/1989 | EP0320844A1 Method for detecting jamming in a digital radio link, and receiving arrangement for carrying out such a method |
| 06/21/1989 | EP0320843A1 Method of and device for transmitting a digital service channel by way of the parity channel of a parity check coded digital data stream |
| 06/20/1989 | US4841526 Data communications system |
| 06/13/1989 | US4839912 Switching circuit arrangement for monitoring a binary signal |
| 06/13/1989 | US4839908 Transmission control apparatus |
| 06/07/1989 | EP0319271A2 Multiplex transmission system |
| 06/07/1989 | EP0319186A1 Synchronization failure detection |
| 06/07/1989 | EP0318665A2 Antenna selection control circuit |
| 06/06/1989 | US4837779 Communicator and communication method and system |
| 06/06/1989 | US4837766 Frame step-out detecting system |
| 06/06/1989 | CA1255368A1 Multi-value signal monitor circuit |
| 06/01/1989 | WO1989005073A1 Data link system |
| 06/01/1989 | WO1989005072A1 Apparatus and method for identification of message initiation in a process control network |
| 06/01/1989 | WO1989005009A1 Paging terminal apparatus with message storage and retransmission capability and method therefor |
| 05/31/1989 | EP0317683A1 Improvements to data validity checking means |
| 05/30/1989 | US4835776 Communication filter |
| 05/30/1989 | US4835731 Processor-to-processor communications protocol for a public service trunking system |
| 05/30/1989 | CA1255007A2 Universal protocol data receiver |
| 05/30/1989 | CA1255006A1 Data transmission system |
| 05/23/1989 | US4833706 Ensemble modem structure for imperfect transmission media |
| 05/23/1989 | US4833690 Remote eye pattern display for digital modems |
| 05/23/1989 | CA1254621A1 Channel switching system |
| 05/18/1989 | WO1989004571A1 Series controller |
| 05/17/1989 | EP0315970A2 Channel switching system |
| 05/17/1989 | EP0315699A1 Method and system for checking errors of signal being transferred through transmission line. |
| 05/16/1989 | US4831635 Trellis codes with spectral nulls |
| 05/16/1989 | US4831624 Error detection method for sub-band coding |
| 05/16/1989 | US4831617 Data communication system having means for switching between main and stand-by apparatuses |
| 05/16/1989 | CA1254277A1 Digital communication system including an error correcting encoder/decoder and a scrambler/descrambler |
| 05/10/1989 | EP0315549A2 Protocol control circuit for data bus system |
| 05/10/1989 | EP0315331A1 Method and apparatus for testing fiber optic hubs |
| 05/10/1989 | EP0314724A1 Control of optical systems. |
| 05/10/1989 | EP0167531B1 Packetized ensemble modem |
| 05/09/1989 | US4829596 Programmable controller with fiber optic input/output module |
| 05/09/1989 | US4829526 Data transmission |
| 05/09/1989 | US4829524 Data communication apparatus |
| 05/03/1989 | EP0313707A1 Data integrity securing means |
| 05/02/1989 | US4827490 Method of synchronizing two binary trains |
| 05/02/1989 | US4827489 Decoding device for digital signals |
| 05/02/1989 | US4827431 Methods and systems for the simultaneous quantitative measurement of phase and amplitude jitter impairments and signal to noise ratio in a qam data communication channel |
| 04/26/1989 | EP0313383A2 Apparatus and Method for Detecting Mode-Hopping in Semiconductor Lasers |
| 04/26/1989 | EP0313105A1 Improved communications interface |
| 04/25/1989 | US4825459 Local loop test arrangement in an echo canceller based full duplex modem |
| 04/25/1989 | US4825449 Analysis of digital radio transmissions |
| 04/25/1989 | US4825113 Single transmission line bidirectional optical communication system |
| 04/25/1989 | CA1253229A1 Adaptive communication rate modem |
| 04/18/1989 | US4823398 Diversity receiver |
| 04/18/1989 | US4823347 Deferred parity checking of control signals across a bidirectional data transmission interface |
| 04/18/1989 | US4823345 Method and apparatus for communication network alert record identification |
| 04/18/1989 | CA1252898A1 Universal protocol data receiver |
| 04/13/1989 | DE3732306A1 Circuit arrangement for error detection in coded digital signals |
| 04/11/1989 | US4821288 Parallel channel equalizer architecture |
| 04/11/1989 | US4821287 Apparatus and method for detecting digital carrier synchronization problems |
| 04/11/1989 | US4821270 Method for decoding data transmitted along a data channel and an apparatus for executing the method |
| 04/11/1989 | US4821267 Monitoring apparatus for monitoring the operating condition of transmission facilities of communications transmission technology |
| 04/11/1989 | US4821227 Plesiochronous matching apparatus |
| 04/06/1989 | WO1989003142A1 Measuring process and device for the analysis of disturbances in digital buses |
| 04/05/1989 | EP0310360A2 Data communication method and apparatus |
| 04/05/1989 | EP0310110A2 (1+N) hitless channel switching system |
| 04/05/1989 | EP0310057A2 Decoder |
| 04/04/1989 | US4819225 Redundant and fault tolerant communication link |
| 03/28/1989 | US4817094 Fault tolerant switch with selectable operating modes |
| 03/28/1989 | US4817089 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels |
| 03/21/1989 | CA1251586A1 Ensemble modem structure for imperfect transmission media |
| 03/21/1989 | CA1251520A1 Digital signal delay circuit |
| 03/16/1989 | DE3723115C1 Test and measuring device for digital signals |
| 03/15/1989 | EP0306970A2 High-speed switching system in a radio-communication system including a plurality of main communication systems and a plurality of stand-by communication systems |
| 03/15/1989 | EP0306713A2 Method and device for data processing |
| 03/15/1989 | EP0306585A1 Data transmission system with a digital alarm facility |
| 03/14/1989 | US4812813 Display radio pager having graphic alarm for selective indication of memory availability factors |
| 03/14/1989 | CA1251263A1 Synchronous/asynchronous modem |