H04Q 11 - Selecting arrangements for multiplex systems

Patents for H04Q 11 - Selecting arrangements for multiplex systems (43,004)
05/1977
05/24/1977	US4025725 Telecommunication switching network having a multistage reversed trunking scheme and switching on a four wire basis
05/17/1977	US4024350 Channel switching unit for a telephone switching center and switching arrangements utilizing such units
05/17/1977	US4024345 Audio program and telephonic communication system
05/10/1977	US4023145 Time division multiplex signal processor
05/10/1977	US4022982 Apparatus for rearrangement of a switching network
05/10/1977	US4022979 Automatic in-service digital trunk checking circuit and method
05/03/1977	US4021652 Incrementally adjustable digital attenuator/amplifier
05/03/1977	US4021619 Improved digital telephone and switching system employing time division multiplex pulse code modulation
05/03/1977	US4021618 Intra link calling within a subscriber digital system
04/1977
04/26/1977	US4020290 Signalization coordinator for PCM switching system
04/26/1977	US4020289 Random access, multiple station communication system
04/19/1977	US4018993 Telephone system comprising a satellite
04/12/1977	US4017689 Digit analysis system for private automatic branch exchange telephone system
04/05/1977	US4016494 Satellite communication system with improved conference facility
04/05/1977	US4016493 Simplified land line and satellite communication switching system
03/1977
03/22/1977	US4013840 Tdm and fdm telephone communication
03/08/1977	US4011543 Low crosstalk optical switch
03/08/1977	US4011412 Method of operating a PCM time-division multiplex telecommunication network
02/1977
02/22/1977	US4009349 Switching station for PCM telecommunication system
02/22/1977	US4009347 Modular branch exchange and nodal access units for multiple access systems
02/22/1977	US4009346 Distributional activity compression
02/22/1977	US4009345 External management of satellite linked exchange network
02/22/1977	US4009344 Inter-related switching, activity compression and demand assignment
02/22/1977	US4009343 Switching and activity compression between telephone lines and digital communication channels
02/08/1977	US4007334 Time division digital local telephone office with telemetering line unit
02/01/1977	US4006314 Digital interface for resynchronizing digital signals
01/1977
01/25/1977	US4005272 Time folded TST (time space time) switch
01/18/1977	US4004099 Time division multiplex switching system
01/11/1977	US4002847 Fault isolation in a serial-looped transmission system
01/11/1977	US4002842 Time multiplex loop telecommunication system
01/11/1977	US4002839 Method and apparatus for the mutual synchronization of the exchange clock pulse oscillators in switching systems of a PCM time division multiplex telecommunication network
01/04/1977	US4001781 Electronic switching element
01/04/1977	US4001514 Subscriber digital multiplexing system with time division concentration
12/1976
12/21/1976	US3999162 Time-division multiplex switching circuitry
12/14/1976	US3997874 Time divided switching and concentration apparatus
12/14/1976	US3997738 Line circuit for telecommunications exchange using TDM
12/14/1976	US3997728 Unit for the simultaneous switching of digital information and signalling data in P.C.M. transmission systems
12/14/1976	US3997727 Time division multiplexed digital switching apparatus
12/07/1976	US3996566 Shift and rotate circuit for a data processor
11/1976
11/30/1976	US3995118 Call processing restoration arrangement for a telephone switching system
11/23/1976	US3993992 Circuit arrangement for converting analog signals into PCM signals and PCM signals into analog signals
11/09/1976	US3991280 Monobus variable resistance transmission circuit
11/09/1976	US3991279 Monobus interface circuit
11/09/1976	US3991276 Time-space-time division switching network
11/02/1976	US3989894 Synchronism error detecting and correcting system for a circulating memory
11/02/1976	US3989892 Line concentrator for dealing with asynchronous and synchronous data signals in a common bit format for a time division data switching exchange
10/1976
10/19/1976	US3987251 Time division switching network for switching multirate multiplexed data
10/19/1976	US3987249 System for addressed timemultiplexed telecommunication
10/12/1976	US3986126 Serial pulse-code-modulated retiming system
10/12/1976	US3986020 Common medium optical multichannel exchange and switching system
10/12/1976	US3985962 Method of information transmission with priority scheme in a time-division multiplex communication system comprising a loop line
10/05/1976	US3984829 Circuit arrangement for converting analog signals into PCM signals and PCM signals into analog signals
10/05/1976	US3984643 Method and apparatus for establishing a plurality of simultaneous conferences in a PCM switching system
10/05/1976	US3984642 Digital telephone and switching system employing time division multiplex pulse code modulation
10/05/1976	US3984641 System for switching and safeguarding data in time-division multiplex switching networks
09/1976
09/28/1976	US3983332 Conference call circuitry for TDM signal exchange
09/28/1976	US3983330 TDM switching network for coded messages
09/21/1976	US3982076 Network control circuit for a time division switching system
09/14/1976	US3980835 Digital network synchronizing system
09/14/1976	US3980833 Call monitor for telecommunication exchange
09/14/1976	US3980831 Data switching system
09/07/1976	USRE28958 Synchronous disconnection and rearrangement
09/07/1976	US3979733 Digital data communications system packet switch
08/1976
08/31/1976	US3978456 Byte-by-byte type processor circuit
08/31/1976	US3978290 Digital private automatic branch exchange
08/24/1976	US3976841 Electronic time switching telephone system
08/10/1976	US3974340 Data switching apparatus and method
08/10/1976	US3974339 Method of transmitting digital information in a time-division multiplex telecommunication network
08/03/1976	US3973242 Digital receiver
07/1976
07/27/1976	US3971892 Tdm switching networks
07/27/1976	US3971891 Adaptable time division switch
07/20/1976	US3970799 Common control signaling extraction circuit
07/20/1976	US3970798 Time division multiplex data transmission system
07/20/1976	US3970796 Time-division-multiplex arrangement
07/20/1976	US3970794 PCM time-division multiplex telecommunication network
07/13/1976	US3969587 Selective transmission of prerecorded voice signals to subscribers of time-sharing telecommunication system
06/1976
06/29/1976	US3967072 Time division network connection auditing arrangement
06/29/1976	US3967060 Fast reframing arrangement for digital transmission systems
06/22/1976	US3965457 Digital control processor
06/22/1976	US3965301 Folded space-time-space switching network
06/15/1976	US3963870 Time-division multiplex switching system
06/01/1976	US3961140 Line switch controller for a time-division switching system
06/01/1976	US3961138 Asynchronous bit-serial data receiver
05/1976
05/25/1976	US3959596 Time division switching network
05/25/1976	US3959594 Arrangement and method for the localized self-control of randomly allotted time slots to audio ports
05/25/1976	US3959588 Digital line synchronizer
05/18/1976	US3958237 Acoustic to pulse code transducer
05/11/1976	US3956593 Time space time (TST) switch with combined and distributed state store and control store
05/04/1976	US3955052 Subscriber unit particularly useful for time-division-multiplex system
04/1976
04/20/1976	US3952162 Time division digital switching network
04/06/1976	US3949299 Signal coding for telephone communication system
03/1976
03/09/1976	US3943296 Method and apparatus for reducing noise in pam time division networks
03/02/1976	US3941947 Connection unit for time division switching system
03/02/1976	US3941936 Telecommunication system using TDM switching
03/02/1976	US3941935 Centralized debiting system for TDM telecommunication network
02/1976
02/24/1976	US3940566 Arrangement for preventing interruptions in a time division multiplex transmission link for transfer of data
02/24/1976	US3940561 Simplex intercommunication system and a two-way intercommunication system having an electronic trunking scheme
02/10/1976	US3937935 Fault detection process and system for a time-division switching network
02/10/1976	US3937895 Circuit arrangement for detecting double connections in digital telecommunication switching systems
02/10/1976	US3937892 Electronic time-division-multiplexed pabx telephone system

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