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Browse by Category: Main > Communications
Class Information
Number: 370/359
Name: Multiplex communications > Pathfinding or routing > Through a circuit switch > Input or output circuit, per se (i.e., line interface)
Description: Subject matter having details of a circuit or technique for controlling how information is handled at an entrance or exit of the switch.










Patents under this class:
1 2 3 4 5 6 7 8 9

Patent Number Title Of Patent Date Issued
5105422 Circuit arrangement for information transmission Apr. 14, 1992
5091920 Threshold valve control system in a receiver circuit Feb. 25, 1992
5088112 Interface unit Feb. 11, 1992
5070449 Bus interface controller for computer graphics Dec. 3, 1991
5058163 Interface unit for transferring digital data between time-domain multiplexed communication links Oct. 15, 1991
5050190 Signal detection circuit not affected by minute voltage fluctuations contained in input signal and operation method therefor Sep. 17, 1991
5042030 Apparatus for rearranging signal channels of a multi-loop time-division multiplexed transmission system Aug. 20, 1991
5042028 Communication terminal device Aug. 20, 1991
5027344 Integrated office controller (IOC) Jun. 25, 1991
5023868 Automated call handling apparatus Jun. 11, 1991
4984234 Time-division switching system Jan. 8, 1991
4970723 ISDN, basic rate interface arranged for quad voice Nov. 13, 1990
4955019 Multimedia information exchanging system and equipment therefor Sep. 4, 1990
4912704 Digital interface device for PCM data, in particular for digital telephone, data processing or image processing systems Mar. 27, 1990
4905237 Communications system comprising an ISDN terminal equipment connection for different ISDN interfaces in an ISDN switching equipment network Feb. 27, 1990
4903263 Apparatus and method for providing existing telephone switching equipment with integrated services digital network capability Feb. 20, 1990
4893309 Digital interface between at least two subscriber line interface circuits and a processing unit Jan. 9, 1990
4885740 Digital signal switch Dec. 5, 1989
4881226 Digital interface of an integrated subscriber line interface circuit Nov. 14, 1989
4864567 High throughput data communication system Sep. 5, 1989
4862456 High speed modem Aug. 29, 1989
4858226 Method for the operation of an interface circuit between a central portion and local portions of a subscriber termination module of a digital time multiplex telecommunications network Aug. 15, 1989
4852085 Expandable digital switching matrix with fault-tolerance and minimum delay time Jul. 25, 1989
4835766 Monitoring system capable of monitoring a sequence of digital signals flowing through a subscriber line May. 30, 1989
RE32900 Fast circuit switching system Apr. 4, 1989
4811358 Subscriber line interface modem Mar. 7, 1989
4789981 System for providing data services to a circuit switched exchange Dec. 6, 1988
4771422 Priority user protection in multiple priority switching systems Sep. 13, 1988
4771418 Time-slot assigner multiplexer Sep. 13, 1988
4737954 Subscriber line signalling device for use in a telecommunications system Apr. 12, 1988
4710769 Transmit-secure non-blocking circuit-switched local area network Dec. 1, 1987
4685100 Digital trunk adapter terminal unit Aug. 4, 1987
4653043 Pre-cutover verification of switching system subscriber lines served via digital carrier facilities Mar. 24, 1987
4642805 Digital link for telephone station sets Feb. 10, 1987
4641301 Telecommunication switching system and priority arrangement used therein Feb. 3, 1987
4637035 Digital modem for multiple telephone circuits Jan. 13, 1987
4627046 Programmable feature card Dec. 2, 1986
4621358 Remote switch for telephony switching system Nov. 4, 1986
4612634 Integrated digital network (IDN) Sep. 16, 1986
4592045 Circuit for the subscriber termination in an integrated services digital network May. 27, 1986
4592046 Subscriber's circuit for time division switching system May. 27, 1986
4589106 Data line card printed board assembly May. 13, 1986
4578789 Simultaneous voice and data communication and data base access in a switching system using a tone bus or broadcast mode Mar. 25, 1986
4577310 Station interface for digital electronic telephone switching system having centralized digital audio processor Mar. 18, 1986
4573151 Interface unit for telephone system having remote units Feb. 25, 1986
4556971 Apparatus for loading memories in a telecommunication exchange Dec. 3, 1985
4547633 Method of and circuit for locating faults in a digital telecommunication subscriber termination Oct. 15, 1985
4532624 Parity checking arrangement for a remote switching unit network Jul. 30, 1985
4530086 Processor controlled adjustment of line circuit transmission parameters Jul. 16, 1985
4527266 Interface circuit for use in a distributed processing switch unit Jul. 2, 1985

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