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Match Document Document Title
7369544 Internet telephone system with hunting diversion  
A method of diverting a hunting function of a PSTN central office switch is provided. The method diverts a hunting function in the event a channel within a hunting group is available but a call can...
6956858 Network routing table and packet routing method  
A routing table circuit for a router has one or more input ports and output ports for message communication. In the routing table circuit, one or more routing table memories store a plurality of...
6766015 Method and device for hunting for communication channel  
A method of hunting for a communication channel in a communication system where a plurality of communication lines each have a plurality of communication channels includes the steps of maintaining...
4782519 Method and apparatus for enhancing the operating capabilities of a telephone switching system  
A method and apparatus is described for providing extended subscriber features, e.g., equal access, to otherwise non-conforming central offices of a telephone switching system. According to the...
4767941 Method for error-protected actuation of the switching devices of a switching station and an apparatus thereof  
A method for error-protected switching operation of switching devices of a high-voltage switching station. The current operational state of the station is determined from the signals provided by...
4132868 PABX System providing multiple paths held between calling line circuits and a plurality of output circuits  
A unique private automatic branch exchange system wherein a plurality of paths from the calling line circuits are established through the switching matrix to more than one output circuit. The paths...
3992592 Scanner-marker arrangement for telephone system  
A scanner arrangement for scanning both line circuits and incoming trunk circuits simultaneously in groups with priority being given to the scanning of incoming trunk circuits. A sequencing means...
3963875 Universal answer arrangement for a PABX  
A universal answer arrangement for a PABX in which incoming trunk calls are automatically connected, when all operator positions are busy or unattended and equipped for universal answer service, to...
3928730 Matrix module and switching network  
A matrix module of integrated construction which is provided with electronic crosspoints, the control gates of which are connected to gate control circuits which are connected to the vertical...
3922499 Communication switching system network control arrangement  
A network control arrangement for a communication switching system having a group of switching network units each having a plurality of inlets and a plurality of outlets and having a plurality of...
3920923 Path finding and marking circuit  
A switching network for multistage switching systems using IC techniques is proposed in which each switching matrix is self-sufficient, i.e. operates independently during both path finding and...
RE28607 PBX In-dialing  
An arrangement is disclosed for providing direct in-dialing telephone service from a conventional, marker-controlled telephone office to the extensions of a PBX whose stations are served by a...
3916124 Nodal switching network arrangement and control  
A switching network and control apparatus therefor are disclosed which permits equi-interconnectability amongst terminations in establishing a connection path between a calling and called...
3906175 Multiple link nodal switching network  
A multilink nodal switching network is disclosed which permits heavy traffic among a plurality of equi-interconnectible switching nodes. Circuitry for busy-testing, for marking idle links and for...
3882281 CONTROL AND SUPERVISION OF TELECOMMUNICATIONS SWITCHING NETWORKS  
A marker is provided for use in conjunction with a central data processing equipment in the control of a telecommunications switching network, which marker provides additional and improved...
3859474 PRIVATE AUTOMATIC BRANCH EXCHANGE WITH CENTRAL OFFICE FEATURES  
A private branch automatic exchange system of substantially unlimited size which includes the combination of a central office with an operator complex, including a plurality of operator position...
3812299 ARRANGEMENT FOR PROTECTING A COMMON HIGHWAY IN A COMMON CONTROL COMMUNICATION SWITCHING SYSTEM  
An arrangement is provided for protecting a common highway in a common control communication switching system of the type having full redundancy of the common control equipment, but not the trunks....
3809822 COMMUNICATION SWITCHING SYSTEM INTERLOCK ARRANGEMENT  
An interlock arrangement for a communication switching system having a switching network controlled by a marker for establishing a path through the switching network between a first supervisory...
3806659 INTERLOCK ARRANGEMENT FOR A COMMUNICATION SWITCHING SYSTEM  
A reference potential is applied to a holding control circuit of a path through a communication switching system network to maintain temporarily the establishment of the path between a line and a...
3806660 TRUNK CIRCUIT HAVING SELECTIVE INTERFACE COMBINATIONS  
A trunk circuit for an automatic exchange which includes a plurality of possible interface terminations with the outside world, which interface terminations may be selected by simply effecting...
3803364 MARKER POWER FAILURE MAKE BUSY CIRCUIT  
A power failure make busy arrangement in a marker for preventing or inhibiting an assigner from accessing a marker when it has suffered a power failure. The busy/idle lead from a marker to each...
3763321 TRUNK CIRCUITS FOR ELECTRONIC TELEPHONE SYSTEMS  
Various telephone trunk circuits and their functions are described for an electronic telephone system for providing interface circuits for trunk lines connected thereto. The trunk circuits include...
3760361 MARKER CIRCUIT FOR A SWITCHING STAGE EQUIPPED WITH INTEGRATED DYNAMIC MEMORY SWITCHES  
Disclosed is a marker for controlling an electronic switching stage. Each crosspoint of the stage includes a holding flip-flop which is used by the marker in its path search, the holding flip flops...
3733439 AUTOMATIC TELECOMMUNICATION SWITCHING SYSTEM  
In a crossbar switching system, the functions of marker circuits are broken down such that there are two common marker circuits for the entire system and two regular marker circuits for each group...
3706856 MEANS FOR SUPERVISION OF THE CONTROL OF TELECOMMUNICATIONS SWITCHING NETWORKS  
A switching network formed by a succession of link-connected stages of crosspoint matrix switches A, B, C and D and having marking means, for marking salient points of any connection required to be...
3705268 PASSIVE JUNCTOR CIRCUIT AND SELECTIVELY ASSOCIATED JUNCTOR CONTROL  
A junctor provides a connection circuit for a line link network, trunk link network and service link network, in the form of a passive switching circuit under control of a junctor control. A single...
3699263 LINE SCANNER AND MARKER ARRANGEMENT USING GROUP SCANNING  
A line scanner and marker arrangement for a common control telephone system in which the line circuits are scanned in groups rather than on an individual line-by-line basis. A request for service...
3681537 MARKER FOR COMMUNICATION SWITCHING SYSTEM  
The disclosure relates to a switching network and marker used in a communication switching system. The network comprises a plurality of coordinate matrices with reed relay crosspoint switching...
3678208 MARKER PATH FINDING ARRANGEMENT INCLUDING IMMEDIATE RING  
The disclosure relates to an arrangement in a marker pathfinding scheme for providing immediate ringing of the called subscriber terminal. The terminating junctors available to a called terminal...
3651273 CIRCUIT ARRANGEMENT FOR COUPLING, HOLDING AND RELEASING OF CROSSPOINT RELAYS IN A CONNECTION PATH IN TELECOMMUNICATION SYSTEMS  
A marking and holding circuit for cross-point relays in a plural stage communications switching network. In each stage, the winding of the cross-point relay is held through an individual hold path...
3646275 BUSY PERIOD MARKER SPEEDUP SYSTEM  
A telephone switching system matrix arrangement controlled by a marker to complete communication connections therethrough. That portion of the marker responsive to a call for service, is shown and...
3636263 TELEPHONE SWITCHING SYSTEM  
A telephone switching office with a unique arrangement of path interconnections wherein originating junctors and incoming trunks enter one side of a route network, and terminating junctors and...
3586786 INTERLOCK FOR TWO ASYNCHRONOUS SYSTEMS  
A telephone switching system matrix arrangement having two originating markers available to serve lines calling for service. Those portions of the two markers responsive to a call for service are...
3585309 CROSSPOINT NETWORK PATH FINDING SYSTEM  
A path finding system for a telephone switching system having a plurality of reed relay matrix stages is described. Different groups of junctors are connected to different matrices of the stage at...
3576949 MULTISTAGE SWITCHING NETWORK EMPLOYING CASCADED THREE-TERMINAL CROSSPOINTS  
A multistage relay crosspoint network is disclosed in which a connection is held operated through the windings of the relays, each in series with its make contact. In a four-stage connection the...
3558826 GUIDE WIRE CONTROL CIRCUIT ARRANGEMENT FOR A MULTI-STAGE CROSSPOINT NETWORK  
A switching network is provided for establishing a connecting path through a plurality of cascaded switching stages. The crosspoint relays which are to be energized are series-connected in a...
3558829 CROSSBAR TELEPHONE SWITCHING SYSTEM WITH MARKER AND PROCESSOR STORED PROGRAM CONTROL  
A telephone central office switching system in which communication paths are established over crossbar switches controlled by line group markers and group selector markers and which includes...
3555208 CIRCUIT ARRANGEMENT TO CHECK A SECTION OF A SWITCHING NETWORK  
This common control telephone network provides an inherent system for checking the most recently operated switching path of sections of the control network for malfunction. A first potential, the...
3555197 GUIDE-WIRE ROUTE SEARCHING NETWORK  
A route search may be completed through a switching network using a guide-wire or pilot network. The search is performed using only a single polarity feeder voltage and ground potential as a...
3549815 MATRIX CONTROL SELECTION SYSTEM  
3548110 SELECTING MEANS  
3546387 REED RELAY SWITCHING NETWORK  
3546390 CONTROL EQUIPMENT FOR MULTI-STAGE CROSSPOINT ARRANGEMENTS  
3542960 SYSTEM FOR SELECTING A FREE PATH THROUGH A MULTI-STAGE SWITCHING MATRIX HAVING A PLURALITY OF PATHS BETWEEN EACH INPUT AND EACH OUTPUT THEREOF  
3541267 COMMON-CONTROLLED AUTOMATIC TELEPHONE EXCHANGE SYSTEM WITH OVERFLOW TRUNKS  
3538268 CONTINUITY FAULT DETECTION  
3536844 CROSSBAR SWITCHING SYSTEM HAVING SPLIT GROUP HUNTING  
3536843 CONTROL CIRCUIT FOR ESTABLISHING CONNECTIONS IN A SWITCHING NETWORK  
3536845 PATH SWITCH OVER SYSTEM GUIDE WIRE CONTROLLED MULTISTAGE CROSSPOINT NETWORK  
3536847 CROSSPOINT OPERATING CIRCUIT  
Matches 1 - 50 out of 157 1 2 3 4 >