Patents
Sitemap › H04 - Electric communication technique › H04Q - Selecting › H04Q 11 - Selecting arrangements for multiplex systems
Patents for H04Q 11 - Selecting arrangements for multiplex systems (43,004)
10/1979
10/16/1979US4171467 Signal multiplexing circuit
10/16/1979CA1064597A1 Unit for the simultaneous switching of digital information and signalling data in p.c.m. transmission systems
10/09/1979US4170718 Immediate ring-back control system for time-division telephone exchange
10/03/1979EP0004307A1 Process for the establishment of conference connections in a PCM-time multiplex switching system
09/1979
09/18/1979US4168400 Digital communication system
09/18/1979CA1062798A1 Connexion network for tdm-pcm automatic switching circuit
09/11/1979US4167652 Method and apparatus for the interchanges of PCM word
09/05/1979EP0003848A1 Digital signal transmission system
09/04/1979CA1061883A1 Data insertion in the speech memory of a time division switching system
08/1979
08/28/1979US4166198 Process for operating sub-zones of a digital t.d.m. telecommunications network for long distance traffic
08/28/1979CA1061482A1 Channel switching unit for a telephone switching centre and switching arrangement utilising such units
08/28/1979CA1061440A1 Call processing restoration arrangement for telephone switching system
08/22/1979EP0003706A1 Multipoint time division digital transmission system
08/22/1979EP0003633A1 A method of and an apparatus for a radiotelephone communications system
08/21/1979CA1061023A1 Telephone artery with multiple access points and telephone networks with such arteries
08/21/1979CA1061004A1 Digital interface for resynchronizing digital signals
08/21/1979CA1060976A1 Time division switching network for switching multirate multiplexed data
08/21/1979CA1060975A1 Common control signaling extraction circuit
08/14/1979US4164629 Time base for synchronous generation of frame and clock pulses
08/14/1979US4164627 Time division switching network using time slot interchangers
08/08/1979EP0003448A1 Space-time division connection network
07/1979
07/31/1979US4163122 Method and apparatus for automatically correcting errors in a cyclic routing memory of a time division multiplexed trunk exchange
07/26/1979WO1979000459A1 Arrangement for maintaining synchronism in a digital telecommunication network
07/24/1979US4162376 Conference call circuit using reversible analog to digital converter
07/24/1979US4162375 Time-divison multiplex switching network with spatial switching stages
07/17/1979US4161633 Subscriber line/trunk circuit
07/12/1979WO1979000422A1 A method and an apparatus for transferring digital information in a telephone system
07/11/1979EP0003009A2 A method and an apparatus for transferring digital information in a telephone system
07/10/1979US4160876 Modular multiplex/demultiplex apparatus
07/03/1979US4160131 Electronic key telephone system
07/03/1979US4160130 Essential user bypass circuit for telephone switching system
07/03/1979US4160127 Time-slot interchange with protection switching
06/1979
06/27/1979EP0002467A1 Equipment for telephone interexchange signalling on PCM carrier realized by centralized-logic line-exchange interface units
06/26/1979CA1057383A1 Time-multiplex programmable switching apparatus
06/14/1979WO1979000318A1 Digital private branch exchange
06/14/1979WO1979000317A1 Digital conference circuit
06/12/1979US4158108 Digital data resynchronization device
06/12/1979CA1056484A1 Method and apparatus for path testing in a time division multiplex switching network
06/05/1979US4157458 Circuit for use either as a serial-parallel converter and multiplexer or a parallel-serial converter and demultiplexer in digital transmission systems
06/05/1979CA1056065A1 Digital data communications system packet switch
06/05/1979CA1056039A1 Method for through connection check in digital data systems
05/1979
05/22/1979US4156110 Data verifier
05/22/1979US4156107 Speech signal scrambler
05/15/1979US4154988 Method and means for accessing program memory of a common control telecommunications switching system
05/15/1979US4154986 Time slot interchanging network
05/15/1979US4154982 Switching network for establishing two-way connections between selected subscribers and an automatic exchange in a PCM telephone system
05/15/1979CA1054525A1 Digital network synchronising system
05/08/1979USRE29991 Adaptable time division switch
05/08/1979US4153817 Digital conference circuit
05/08/1979US4153816 Time assignment speech interpolation communication system with variable delays
05/08/1979CA1054242A1 Network control circuit for a time division switching system
05/01/1979US4152548 Immediate ring-back control system for time-division telephone exchange
04/1979
04/17/1979US4150258 Electronic switching system
04/10/1979US4149038 Method and apparatus for fault detection in PCM muliplexed system
04/10/1979CA1052472A1 Data processing circuit operating on byte-by-byte basis
04/03/1979US4147896 Fixed speech buffer memories for signalling without an order wire
04/03/1979US4147894 Time division multiplex communication device comprising a switching matrix between C/E buffers and control circuits
04/03/1979CA1051998A1 Tdm pcm communication system
03/1979
03/27/1979US4146749 Telecommunications network having multi-function spare network block
03/27/1979US4146748 Switching arrangement for pulse code modulation time division switching systems
03/22/1979WO1979000138A1 Integrated switching and transmission network
03/20/1979US4145574 Circuit arrangement for the transmission of digital signals between subscriber stations of a time multiplex telecommunications network
03/20/1979US4145573 Digital satellite system and method for serving users of differing capacities
03/13/1979US4144406 Time-multiplex modular switching network for automatic exchange
03/06/1979US4143246 Time division line interface circuit
03/06/1979US4143241 Small digital time division switching arrangement
02/1979
02/27/1979US4142068 Time-division and spatial connection network
02/06/1979US4138599 Modular communication system having self-identifying modules
02/06/1979US4138597 PCM time slot exchange
02/06/1979US4138596 Equipments for connecting PCM multiplex digital transmission systems having different nominal bit rates
01/1979
01/30/1979CA1047659A1 Active hybrid circuit
01/23/1979US4136263 Telephone system having space divided speech channels and a separate time divided data highway
01/16/1979US4135060 Circuit arrangement for a time division multiplex communication system for the channel by channel combination at the receiving end of information transmitted in the form of multiframes
01/16/1979CA1046645A1 Digital line synchronizer
01/16/1979CA1046617A1 Time divided switching and concentration apparatus
01/09/1979US4133980 Data pulse register/sender for a TDM switching system
01/02/1979US4132866 Concentration network for a time division multiplex telephone exchange with pulse amplitude modulation
12/1978
12/26/1978US4131763 Bit switching of word synchronized data
12/26/1978US4131762 Buffer storage assignment arrangement for time-division switching systems
12/21/1978WO1978000018A1 A digital time division switching arrangement
12/19/1978US4130743 Terminal equipment for a multiplex carrier current telephone system
12/19/1978US4130736 Telecommunication system with keyboard selection
12/19/1978CA1044827A1 Fast reframing arrangement for digital transmission systems
12/19/1978CA1044789A1 Time-switching electronic telephony system_
12/12/1978US4129756 Telephone exchange signalling unit
12/05/1978CA1043886A1 Method and apparatus for idle path search in a time division multiplexed switching network
11/1978
11/28/1978US4127745 Date time-multiplex switching network for use in a telecommunications exchange
11/28/1978US4127742 Time division telecommunication system
11/28/1978CA1043464A1 Common control variable shift reframe circuit
11/28/1978CA1043428A1 Asynchronous bit-serial data receiver
11/14/1978US4125747 Telephone switching circuit
11/14/1978US4125745 Method and apparatus for signaling and framing in a time division multiplex communication system
11/14/1978CA1042533A1 Automatic gain compensation in time division switching system
11/07/1978US4124777 Signal exchange system in an integrated services digital network
10/1978
10/31/1978US4123624 Switching network for a PCM TDM system
10/31/1978CA1041682A1 Coupling device for connection between pam time division telephone exchange and a pcm time division transmission system
10/31/1978CA1041671A1 Serial digital bit stream code detector
10/24/1978US4122310 Space stage in a PCM-exchange
10/24/1978CA1041236A1 Common control framing detector
10/24/1978CA1041201A1 Intra link calling within a subscriber digital system
1 ... 418 419 420 421 422 423 424 425 426 427 428 429 430 431