Switched virtual circuit call processing/routing system
September 30, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod of using a narrowband server to provide service features to broadband subscribers Data router backup feature Method and apparatus for fault tolerant call processing Broadband telecommunications system System and method for establishing a call telecommunications path System for managing telecommunications ATM network arranged to interface with STM in-band signaling Method and system for call signaling in telephone calls over a packet-switched network ATM-based private network having short-cut speech path and transit signaling path Method and apparatus for signaling over packet-based systems InventorsApplicationNo. 09410229 filed on 09/30/1999US Classes:370/356, Routing circuit switched traffic through a packet switching network370/522, Signaling (ancillary to main information)379/234PBX to central office signalling (e.g., direct outward dialing)ExaminersPrimary: Duong, FrankAssistant: Jagannathan, Melanie Attorney, Agent or FirmInternational ClassH04L 1266AbstractA method for operating a switched virtual circuit call processing/routing system, and a computer readable medium containing a call processing/routing program for a voice network switching (VNS) system are disclosed. In a preferred embodiment, an adjunct processor is attached to a network node and software-configured to service the switching needs of one or more PBXs that are also tied to the network node. The service capability offered by the software-configured adjunct processor alows PBXs to establish voice and data connections between each other dynamically via Switched Virtual Circuits (SVCs) that are routed directly across a WAN. This arrangement eliminates the need for an extensive mesh of PVCs or leased “tie lines” carrying voice and data traffic between PBXs across the WAN. It also eliminates the need for routing connections in multiple hops between PBXs. Another advantage is that the number of physical interfaces required on the PBXs and the attached switches is reduced. Also, the adjunct processor approach generally requires no modification to the PBX software in order to interoperate with the PBX.In the preferred embodiment, the SVC functions are handled in one process, and the PBX signaling/call processing functions are handled in another process, with the two processes communicating via a message pipe. Other than the requests and results passed via the pipe, each process is largely unconcerned with the operation of the other. This division of labor simplifies the otherwise complex VNS operational tasks into two groups of related tasks that can each be handled separately, simplifying operation and isolating changes in one “end” of the system from affecting the other.Other References
Field of SearchBypass an inoperative stationControl of data admission to the network Standby switch Combining or distributing information via time channels using multiple access technique (e.g., TDMA) Frame length Message having an address header Having a signaling feature Adapting constant bit rate (CBR) data (e.g., voice, or narrow band ISDN over ATM, or using AAL1) Processing of address header for routing, per se Signaling (ancillary to main information) Using leaky bucket technique Using OAM (Operation, Administration and Maintenance) cells Congestion based rerouting Including signaling between network elements Flow control of data transmission through a network Least cost or minimum delay routing Using RM (Resource Management) cells Combined circuit switching and packet switching Switching network having common elements to handle both circuit switched traffic and packet switched traffic Switching network having separate elements to handle circuit switched traffic and packet switched traffic Routing packets through a circuit switching network Routing circuit switched traffic through a packet switching network Of centralized switching system Interexchange signalling Signalling path distinct from trunk (e.g., CCIS) Central office-to-PBX signalling PBX to central office signalling (e.g., direct outward dialing) | |
