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)
10/1978
10/17/1978US4121057 Frame synchronizing device
10/10/1978US4119804 Open loop system for transmitting digital information
10/10/1978US4119803 Control unit for a time-division telecommunications exchange
10/10/1978CA1040330A1 Method and apparatus for reducing noise in pam time division networks
10/10/1978CA1040329A1 Telephone system comprising a satellite
10/10/1978CA1040327A1 Active hybrid sidetone producing circuitry for sidetoneless telephone
10/03/1978US4118697 Switching arrangement for converting analog signals into digital signals and digital signals into analog signals
10/03/1978CA1039867A1 System for addressed timemultiplexed telecommunication
09/1978
09/26/1978US4117269 Time division multiplex telecommunication exchange
09/26/1978US4117268 Digital direct response switching system
09/26/1978CA1039424A1 Universal pbx line circuit for key and non-key service
09/26/1978CA1039413A1 Shift and rotate circuit for a data processor
09/12/1978US4114143 Modular switching system
09/05/1978US4112427 Reversible analog-to-digital converter
09/05/1978US4112426 Apparatus for converting analog signals into digital signals and digital signals into analog signals
09/05/1978US4112258 Communication system using intelligent network processor
09/05/1978CA1038092A1 Alarm arrangement for a time-division multiplex, pulse-code modulation carrier system
09/05/1978CA1038067A1 Multiple fault tolerant digital switching system for an automatic telephone system
08/1978
08/29/1978US4110562 Service generator for generating a plurality of tones
08/29/1978US4110560 Communication apparatus
08/29/1978CA1037599A1 Time-division pulse-multiplex digital electric signal switching circuit arrangement
08/29/1978CA1037598A1 Program controlled time division switching system
08/29/1978CA1037597A1 Switching system for multichannel lines
08/15/1978US4107480 Pulse code modulated, time division multiplex switching network
08/15/1978CA1036730A1 Station loop control arrangement for telephone switching system
08/15/1978CA1036726A1 Carrier concentrator system and method
07/1978
07/25/1978US4103110 Telephone transmission system comprising digitally processing frequency multiplexor and demultiplexor
07/18/1978US4101737 Control arrangement in a time-space-time (t-s-t) time division multiple (t.d.m.) telecommunication switching system
07/11/1978US4100377 Packet transmission of speech
06/1978
06/27/1978US4097694 Time-division telephone system embodying trunks having demodulating-adder circuits
06/27/1978US4097693 Switching system for an automatic telecommunication exchange with a plurality of intermediate lines that are grounded when not in use
06/20/1978US4096566 Modular signal processor having a hierarchical structure
06/13/1978US4095055 Multi-stage switching network in a telecommunication switching system
06/13/1978US4095048 Method of synchronizing a pulse code modulation (pcm) junction and an arrangement for applying this method
06/06/1978US4093828 Switching networks, e.g. space-division concentrators
06/06/1978US4093827 Symmetrical time division matrix and a network equipped with this kind of matrix
05/1978
05/30/1978US4092497 Connection network for PCM TDM automatic telephone exchange equipment
05/16/1978US4090237 Processor circuit
05/02/1978US4087643 Time division multiplexed PABX communication switching system
04/1978
04/25/1978US4086437 Resynchronizing circuit for TDM system
03/1978
03/28/1978US4081616 Method of and apparatus for eliminating the side tone of a telephone station
03/28/1978US4081612 Method for building-up of routing addresses in a digital telecommunication network
03/28/1978US4081611 Coupling network for time-division telecommunication system
03/28/1978US4081610 Fast access antiphase control memory for digital data switches
03/14/1978US4079209 Method and apparatus for limiting the number of build-up packets during the process of building up a routing address in a digital telecommunication network
02/1978
02/28/1978US4076966 Method of and system for handling conference calls in digital telephone exchange
02/28/1978US4076964 Time division system for synchronizing functions controlled by different clocks
02/21/1978US4075432 Telephone concentrator
02/14/1978US4074080 Method and switching arrangement for synchronizing oscillators of a digital telecommunication network
02/14/1978US4074077 TST exchange with series-mode space switching stage
02/14/1978US4074072 Multiprocessor control of a partitioned switching network by control communication through the network
01/1978
01/31/1978US4071704 Service generator checking apparatus
01/31/1978US4071703 Time slot interchanger
01/31/1978US4071702 Time division exchange and a method for the reconfiguration of this exchange
01/31/1978US4071701 Method of and apparatus for addressing a buffer memory in a transit exchange for synchronous data signals
01/24/1978US4070554 Digital testing and power control in a digital communication system
01/24/1978US4070551 Local call completion for time division multiplexing system
01/17/1978US4069399 TDM PCM Communication system
01/10/1978US4068099 Method of and apparatus for switching service information units in a TDM system
01/10/1978US4068098 Method of and arrangement for addressing a switch memory in a transit exchange for synchronous data signals
12/1977
12/27/1977US4065644 Electro-optical and electronic switching systems
12/27/1977US4065641 High capacity time connection networks
12/20/1977US4064370 Time-division switching system
12/20/1977US4064369 Method and apparatus for path testing in a time division multiplex switching network
12/20/1977US4064360 High speed digital switch
12/06/1977US4061880 Time-multiplex programmable switching apparatus
12/06/1977US4061879 Method and apparatus for transmitting digital information signals from signal transmitters to signal receivers over switching apparatus
11/1977
11/29/1977US4060797 Serial digital bit stream code detector
11/29/1977US4060698 Digital switching center
11/22/1977US4059729 Method and system for selectively accessing multiplexed data transmission network for monitoring and testing of the network
11/15/1977US4058682 Expandable memory for PCM signal transmission
11/08/1977US4057804 Branched path communications apparatus for routing communications signals
11/08/1977US4057695 Telecommunication system with controlled gain active filters
10/1977
10/25/1977US4055728 Fine division telephone multiplexed switching network
10/18/1977US4054757 Conference circuit using PCM techniques
10/18/1977US4054754 Arrangement for transmitting digital data and synchronizing information
09/1977
09/27/1977US4051328 Method for operating a digital time division multiplex communication network
09/20/1977US4049908 Method and apparatus for digital data transmission
09/20/1977US4049906 Message network for the transmission of digital telegrams with an address consisting of routing words
09/13/1977US4048449 Method for forming a conference connection in a telecommunication switching system
09/13/1977US4048448 Multiparty telephone ringing
09/13/1977US4048445 Method for through connection check in digital data system
09/06/1977US4046964 Testing of digital systems
09/06/1977US4046963 Times slot switching
08/1977
08/30/1977US4045617 Telecommunication switching network having a multistage reversed trunking arrangement
08/16/1977US4042781 Apparatus for synchronizing oscillators in the network nodes of a digital telecommunications network
07/1977
07/26/1977US4038497 Hardwired marker for time folded tst switch with distributed control logic and automatic path finding, set up and release
07/19/1977US4037117 Peak shut-off electronic switch
07/19/1977US4037054 Circuit arrangement for monitoring PCM couplers
07/12/1977US4035584 Space division network for time-division switching systems
07/05/1977US4034294 Decoder with reaction time compensation
07/05/1977US4034159 Switching system for multichannel lines
06/1977
06/28/1977US4032719 Modular slot interchange digital exchange
06/28/1977US4032718 Four-wire integrable hybrid
06/28/1977US4032714 Pcm time division multiplex communication network with digital subscriber stations
06/21/1977US4031327 Telephone set and system utilizing frequency division multiplexing
06/21/1977US4031326 Telephone artery with multiple access points and telephone networks with such arteries
06/07/1977US4028495 Time division communication system adapted to structural expansion
05/1977
05/31/1977US4027106 Interface unit for TDM switching component of PCM telecommunication system
05/24/1977US4025947 Video assignment systems
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