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| Number | Title | Issue Date |
| 7358717 | Input by-pass circuit for a current probe An input by-pass circuit for a current probe has first and second switches coupled between current probe inputs and current sensing circuit inputs. A switch control is coupled to the switching circuit for selectively coupling and decoupling the current probe inputs ... | 04/15/2008 |
| 7029183 | Optical fiber array connector An optic array connector is disclosed. The fiber optic array includes a first faceplate having a plurality of openings. The first faceplate is oriented in a first direction. The fiber optic array also includes a second faceplate having a plurality of openings. The s... | 04/18/2006 |
| 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 routing table arrays. The routing table arrays are arranged hierarchica... | 10/18/2005 |
| 6870908 | Voice storage device and incoming call answering system According to the present invention, a voice storage device includes a port control unit for monitoring a service state of a port of a PBX extension circuit, and a private branch exchange is configured to transmit, upon receipt of an incoming call, an incoming signal... | 03/22/2005 |
| 6813242 | Method of and apparatus for fast alternate-path rerouting of labeled data packets normally routed over a predetermined primary label switched path upon failure or congestion in the primary path A new technique for fast alternate-path automatic rerouting of labeled data packets normally routed over a predetermined primary label switched path upon failure or congestion in the primary path. ... | 11/02/2004 |
| 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 a record of current channel statuses of the communication channels wi... | 07/20/2004 |
| 6748070 | Method for allocating network resources Network resources for a call between a calling party and a called party are allocated. The network resources for the call are reserved based on a reservation request. The network resources are reserved before any one network resource from the reserved network resour... | 06/08/2004 |
| 5757897 | Telephone switch call control unit There is disclosed an apparatus for providing automatic call distribution and auto-attendant capabilities to a digital telephone switch not having those capabilities. Digital interface circuitry is provided to emulate the appearance of a digital telephone... | 05/26/1998 |
| 5146452 | Method and apparatus for rapidly restoring a communication network The present invention provides an approach to reconnect a communications network such as a DS3 telephone-type network when a span of DS3 channels is rendered inoperative, such as by cutting, within the 1.5 second time frame necessary to prevent disablemen... | 09/08/1992 |
| 4866708 | Communication channel ownership arrangement A communication channel ownership arrangement where two call units (switching modules) each own certain ones of the bidirectional channels between the units. By virtue of ownership, a call unit can immediately assign owned channels to calls without consul... | 09/12/1989 |
| 4791662 | Controlling key-system groups from a distributed control switching system A distributed control switching system where calls, to and from a directory number that is shared by a key-system group of terminals, are processed cooperatiavely by multiple, distributed control units but in response to busy/idle data for the shared dire... | 12/13/1988 |
| 4694487 | Controlling multi-fort hunt groups in a distributed control switching system A distributed control switching system where the system control units cooperatively perform the terminating port determination function. Multi-port hunt groups having members that span a number of switching modules each having an associated control entity... | 09/15/1987 |
| 4689815 | Controlling multi-port hunt groups in a distributed control switching system A distributed control switching system where multi-port hunt groups are controlled by hunting for idle group members in a sequential fashion starting with the members on one of the switching modules of the system and continuing through a predetermined seq... | 08/25/1987 |
| 4349702 | Nodal switching network with binary order links A nodal switching network is disclosed wherein each node is connected to distant nodes by groups of links whose lengths are ordered to span distances definable by powers of a finite (preferably binary) integer. Starting at the calling node, a single idle ... | 09/14/1982 |
| 4095055 | Multi-stage switching network in a telecommunication switching system A multi-stage switching network in a telecommunication switching system includes a virtual link frame having fixedly closed virtual switches which are inserted according to the switching system size required by the application range of telephone traffic i... | 06/13/1978 |
| 4063043 | Intraoffice alternate connection arrangement An intraoffice trunk switching system wherein a connecting path between the called subscriber and the intraoffice trunk is established first; the connecting path between the calling subscriber and the intraoffice trunk to which the called subscriber is co... | 12/13/1977 |
| 4004103 | Path-finding scheme for a multistage switching network A plurality of idle paths through a multistage switching network which are capable of establishing a connection between a particular line and a particular trunk are identified. Repeated selection of paths identified as idle, but actually out-of-service, i... | 01/18/1977 |
| 3985975 | Holographic telephone switching system A matrix of electrical to light converting diodes are each coupled to different ones of a plurality of incoming telephone lines. These diodes emit light at all times and have their light intensity modulated by intelligence when intelligence is present on ... | 10/12/1976 |
| 3963872 | Non-symmetric folded four-stage switching network A telephone central office switching system including a non-symmetric four stage (ABC+D) folded network and junctor circuits whereby a communication path is established from a calling terminal over the four stage network, through a junctor circuit, and ba... | 06/15/1976 |
| 3935394 | Network routing and control arrangement A system is disclosed for selecting and establishing connections through a two-stage concentrator network utilizing path selection circuitry adapted to minimize blocking. This circuitry operates to select a path through the second-stage switch which is th... | 01/27/1976 |
