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)
07/1981
07/07/1981CA1104698A1 Automatic telephone exchange system capable of communication of speech signals and data transfer
06/1981
06/30/1981US4276641 Method and apparatus for converting time-division data signals received on an incoming trunk to time-division data signals of different format for transmission over an outgoing trunk
06/30/1981US4276639 Telephone exchange with time shared speech paths and selectively attenuated speech signals
06/30/1981US4276637 Time-division switching network and means of mitigating the effect of fault conditions
06/30/1981US4276451 Control system for telephone switching system
06/23/1981CA1103792A1 Telecommunications network having multi-function spare network block
06/16/1981CA1103340A1 Time division telecommunications system
06/09/1981US4272844 Multiplex time division switching network unit of the time-time type
06/09/1981US4272648 Gain control apparatus for digital telephone line circuits
05/1981
05/26/1981US4270027 Telephone subscriber line unit with sigma-delta digital to analog converter
05/26/1981US4270026 Interpolator apparatus for increasing the word rate of a digital signal of the type employed in digital telephone systems
05/26/1981CA1101970A1 Time division line interface circuit
05/19/1981US4268727 Adaptive digital echo cancellation circuit
05/19/1981US4268722 Radiotelephone communications system
05/19/1981CA1101531A1 Continuously expandable switching network
05/19/1981CA1101530A1 Distributed control for switching system
05/13/1981EP0028416A1 Broadband switching system
05/06/1981EP0028104A1 Signal control system for a time-division speech network
05/05/1981US4266292 Method and apparatus for testing analog-to-digital and digital-to-analog code converters
05/05/1981CA1100613A1 Numerical signal switching system
05/05/1981CA1100612A1 Bit switching of word formatted data
04/1981
04/22/1981EP0027410A1 Switching method for time division multiplex signals transmitted by a carrier wave, particularly an optical wave, and device for putting it into use
04/22/1981EP0027226A1 Testing system for a connection network
04/15/1981EP0027042A2 A network connection system
04/15/1981EP0027006A2 Decoding terrestrial interface modules bus structure
04/08/1981EP0026328A2 Demand assignment method and system for a time division multiple access satellite communication network
04/07/1981US4261052 Integrated switching and transmission network
04/07/1981US4261051 Time-division-multiplexed exchanger
03/1981
03/31/1981US4259549 Dialed number to function translator for telecommunications switching system control complex
03/31/1981CA1098324A1 No translation available
03/25/1981EP0025753A1 Interface for passing to a packet-mode transmission connection from a digital transmission connection of another mode
03/25/1981EP0025577A1 Circuit arrangement for the equalisation of the phase differences between the highway clock on a PCM time division line connected to a PCM exchange and the local clock of this PCM exchange
03/25/1981EP0025465A1 Apparatus for use in telephone communication
03/24/1981US4258434 Bit-by-bit time-division digital switching network
03/24/1981CA1098211A1 Overlap pcm coder/decoder with reaction time compensation
03/18/1981EP0025225A1 Broadcast and alternate message time slot interchanger
03/18/1981EP0025216A1 Signalling arrangement in a voice transmission system with optically powered modules
03/17/1981US4257119 PCM switching system for wide and narrow band signals
03/17/1981US4256926 Microprocessor control complex for a telecommunication switching system
03/17/1981CA1097782A1 Modular time division switching system
03/11/1981EP0024725A1 Circuit arrangement for connecting operator positions to a multistage time division multiplex telephone exchange
03/11/1981EP0024708A1 Time-slot multiple for a time division multiplex system for switching digital signals, in particular delta modulated messages
03/11/1981EP0024617A1 Digital telecommunication system
03/03/1981US4254498 Time division telephone switching systems
03/03/1981US4254496 Digital communication bus system
02/1981
02/24/1981US4253179 Time division digital switching system with code converting and inverse-converting circuits
02/24/1981CA1096522A1 Subscriber line-trunk circuit
02/24/1981CA1096479A1 Time-division switching system
02/19/1981WO1981000498A1 Digital loop synchronization circuit
02/17/1981US4251684 Data storage systems
02/11/1981EP0023689A1 Logic apparatus for the preprocessing of alarm signals
02/11/1981EP0023558A1 Method for the transmission of digital message signals on a two-wire transmission line in full duplex operation
02/04/1981EP0023331A1 Circuit arrangement for the synchronization of a subordinate device, in particular a digital subscriber station, by a higher order device, in particular a digital switching exchange of a PCM telecommunication network
02/04/1981EP0023297A1 Digital telecommunication system
02/03/1981CA1095192A1 Digital type telephone system having a conference function
02/03/1981CA1095191A1 Channel translators for use in time division digital exchangers
01/1981
01/20/1981US4246530 Memory network for TDM switching system
01/13/1981US4245340 Data link for digital channel bank systems
01/13/1981US4245339 Telecommunication switching network having a multistage reversed trunking scheme
01/13/1981CA1093717A1 Open loop system for transmitting digital information
01/07/1981EP0021932A1 Switching network and telecommunication centre comprising such a network
01/07/1981EP0021290A1 Method and circuit arrangement for synchronisation of the transmission of digital information signals
01/07/1981EP0020878A1 Service integrated information transmission and switching system for sound, picture and data
01/06/1981US4244046 Digital data transmission system providing multipoint communications
01/06/1981CA1093195A1 Digital switching of electronic signals
12/1980
12/23/1980CA1092245A1 Synchronisation device "frame"
12/23/1980CA1092225A1 Telephone exchange and associated control circuits
12/16/1980CA1091831A1 Telecommunication systems
12/10/1980EP0020255A1 Switching level of an operator for a packet-switched digital data network
12/10/1980EP0019921A1 Time division digital communication system
12/09/1980US4238851 Packet transmission system
12/02/1980CA1090909A1 Communication system using intelligent network processor
11/1980
11/26/1980EP0019250A1 Circuitry for telephone sets connected to PCM terminal lines
11/25/1980US4236244 Digital communications transmission system
11/18/1980CA1089963A1 Digital time division switching arrangement
11/18/1980CA1089962A1 Bit switching of word synchronized data
11/12/1980EP0018911A1 Logic unit for message control
11/12/1980EP0018910A1 System for connecting operator positions to an exchange having a digital switching network
11/12/1980EP0018879A1 Modular time-division connection network
11/12/1980EP0018865A1 Concentrator-deconcentrator device
11/12/1980EP0018618A1 Multiplex synchronisation device in a TDM exchange
11/12/1980EP0018617A1 System for exchanging coded messages between stations
11/12/1980EP0018616A1 Control logic for a multiplex connection unit in a time division exchange
11/12/1980EP0018615A1 Multiplex connection device in a TDM exchange
11/12/1980EP0018526A1 Method of operating digital main terminals and/or branch exchanges connected to a PCM exchange
11/12/1980EP0018525A1 Circuitry for a digital telephone subscriber station
11/04/1980US4232386 Subscriber switch controller for controlling connections between a plurality of telephone subscriber lines and a pair of multitime-slot digital data buses
10/1980
10/29/1980EP0017988A1 Multiplex interface circuit connecting a processor to a synchronous transmission means
10/29/1980EP0017835A1 Circuitry for controlling the transmission of digital signals, especially PCM signals, between connection points of a time division multiplexing telecommunication network, especially a PCM network
10/28/1980US4230911 Carrier terminal unit
10/28/1980US4230910 Signalling and channel loop test circuits for station carrier telephone system
10/28/1980CA1088656A1 Space stage in a pcm-exchange
10/14/1980US4228536 Time division digital communication system
10/14/1980US4228535 Dual TDM switching apparatus
10/14/1980US4228499 Interface unit for data exchange between a central processor and a peripheral unit in TDM telecommunication system
10/14/1980CA1087770A1 Active two-wire to four-wire coupling circuits
10/07/1980US4227248 PCM Tone signal generator
10/01/1980EP0016426A1 Digital telephone exchange
09/1980
09/30/1980CA1086876A1 Interface circuit for digital telephone facilities
09/23/1980US4224475 Time division switching network
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