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| Number | Title | Issue Date |
| 5058105 | Network alternate routing arrangement A facility is provided for enhancing the reliability of a communications network so that traffic whose flow is disrupted by, for example, a faulty link, may be quickly restored to service. In particular, such traffic is restored to service by establishing... | 10/15/1991 |
| 5048081 | Arrangement for routing packetized messages In a telecommunication system having a plurality of cooperating exchanges and using a separate signaling network, an existing exchange is replaced by a new exchange by a piecemeal transferring of interexchange trunks from the existing exchange to the new ... | 09/10/1991 |
| 5027384 | Personalized automatic call routing A user programmable telecommunication system for allowing calling parties to select optional call completion destinations during busy and no-answer status conditions. A telephone user can program the system to provide personalized voice responses to calli... | 06/25/1991 |
| 5014262 | Apparatus and method for detecting and eliminating call looping in a node-by-node routing network An apparatus and method for effectively managing a switched virtual circuit network by detecting and resolving call routing problems occurring in the routing pattern of the network is provided. Detecting the call routing problems is advantageously achieve... | 05/07/1991 |
| 4991204 | Adaptive routing control method In a telecommunications network in which a plurality of switching nodes are interconnected via links each composed of a plurality of trunks and are each connected to a network control center via a control signal link, the network control center determines... | 02/05/1991 |
| 4972465 | Switching system reliability A switching system is disclosed in which inter-switch unit trunks interconnect the switch units of a distributed switching system and when the central switch, which normally advances connections between the switch units is unavailable, connections between... | 11/20/1990 |
| 4943999 | Switching system reliability A switching arrangement is disclosed in which connections are advanced between lines and trunks of a first telecommunication switching system via a central switch of the first telecommunication switching system and, when the central switch is unavailable,... | 07/24/1990 |
| 4885780 | Method for call routing in a network A method for setting up calls in a telecommunications network is disclosed. A call arrives at originating switch A for destination switch B. An attempt is made at switch A to allocate a trunk from the direct trunk group between A and B. If a trunk is avai... | 12/05/1989 |
| 4862496 | Routing of network traffic A method and apparatus for routing traffic in a circuit switched network. A call between two nodes interconnected by a direct link is first offered to the direct route, and if that is blocked it is offered to a currently nominated two-link alternative rou... | 08/29/1989 |
| 4837816 | Communication system using switching apparatus In a telephone switching apparatus having an inter-office interface consisting of a plurality of communication circuits having different priorities and a control line for transfer of call control signals, a first circuit having the highest priority is hun... | 06/06/1989 |
| 4791663 | Telephone status recognition and bypass system A telephone status recognition and bypass system includes a plurality of status recognition units, and a controller. Each status recognition unit interfaces a subscriber's telecommunication line between a plurality of peripheral services and to a switch n... | 12/13/1988 |
| 4788721 | Routing of network traffic A process is disclosed for routing service requests through a network comprising nodes interconnected with links. The network is also arranged so that each node may communicate with each of the other nodes. At preselected time intervals, sets of routes th... | 11/29/1988 |
| 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 invention, a register module is interposed between the subscr... | 11/01/1988 |
| 4756019 | Traffic routing and automatic network management system for telecommunication networks An adaptive, tariff dependent traffic routing system, which controls routing of traffic and performs management of network resources in multi-node telecommunication networks, where the cast for a communication depends on the type of service provided and o... | 07/05/1988 |
| 4754479 | Station number portability An arrangement is disclosed for providing station number portability to stations ported from an original switching node to a new switching node which allows the ported station to maintain its original assigned station number. A ported station retains its ... | 06/28/1988 |
| 4748658 | Architecture for allocating resources in a telecommunications network A control network for allocating resources (i.e. making routing decisions) in an associated telecommunications network is disclosed. Illustratively, the control network comprises a group of processors arranged in a ring. A database containing information ... | 05/31/1988 |
| 4741027 | Transmission path selection circuit in a telecommunication network In military telecommunication networks a functional dialling number diagram is used independent from the network configuration. As the network structure in a military telecommunication network constantly changes and the subscriber can move to a different ... | 04/26/1988 |
| 4737983 | Automatic call distributor telephone service A method of balancing traffic loads to a plurality of customer automatic l distributors (ACDs). Each ACD periodically transmits call congestion data to a central data base. Periodically, the data is automatically analyzed and resulting call routing infor... | 04/12/1988 |
| 4704724 | Routing of network traffic A process is disclosed for routing service requests through a network comprising nodes interconnected with links. The network is also arranged so that each node may communicate with each of the other nodes. At preselected time intervals, sets of routes th... | 11/03/1987 |
| 4669113 | Integrated network controller for a dynamic nonhierarchical routing switching network A nonhierarchial switching system employing a modified unified algorithm for developing link sizes for paths that connect switches in the system and routing sequences for the switches in the system, and further employing means for updating the routing seq... | 05/26/1987 |
| 4656658 | Network routing arrangement Circular paths in a multinode connection are avoided by passing an adaptive routing state, from node to node, which specifies the path options that the current node may use in its selection of a next step in the connection. The routing state, which is cha... | 04/07/1987 |
| 4594477 | PBX equipment with dial signal modification At least three private branch exchange program-controlled telephone equipments (PBX's) in different countries form a system in which the PBX's are interconnectible by direct tie lines, tandem lines or direct distance dialing lines. Each PBX is equipped wi... | 06/10/1986 |
| 4400587 | Overflow and diversion to a foreign switch A method of overflow and diversion re-routing is disclosed for use in an automatic call distributor system of the type in which an incoming call is assigned to an original gate, that is, a group of agents, but in selected circumstances the call is to be r... | 08/23/1983 |
| 4348554 | Method of providing virtual private network telephone service A method is disclosed for providing private network types of telephone services via the public switched network without having it provide private hardware facilities. The method is described with respect to a telephone system comprising plural telephone s... | 09/07/1982 |
| 4345116 | Dynamic, non-hierarchical arrangement for routing traffic In a network for routing traffic from an originating node to a terminating node, it is common to provide alternate routes in order to increase the number of route choices between the originating and terminating nodes. The Bell System toll network employs ... | 08/17/1982 |
| 4284852 | Alternate routing for a telephone system An alternate routing scheme for a telephone system wherein a plurality of switching offices are grouped into a cluster, with each switching office in the cluster having direct trunk lines to all the other switching offices in its cluster. This allows each... | 08/18/1981 |
