Westell Technologies, Inc.

Bell Sygma Inc.

George W Turner

Rodger Higgins

William J Noll

Paul V Harrington

A system and method for providing call management services in a Virtual Private Network of the present invention uses the advantages of end-to-end Internet Protocol signaling. The system and method of the present invention includes a user profile which offers both a customer address and a user name as search keys. The method includes locating the called party who may be at a multiplicity of possible physical locations, evaluating the calling and called party privileges, routing preferences and busy/idle status for establishing permission to set up the call, determining an optimum route to establish the telephone call. Due to the system and method of the present invention, the telephone call takes the optimum route and preferably the most direct route to the destination with a high probability of completion.

System and method for providing call management services in a virtual private network using voice or video over internet protocol

A system and method for providing a private telephone network using Voice over Internet Protocol includes an addressing scheme that supports two levels of numbers, an Internet name that identifies individual users and a Directory number, which allow the network supported by a plurality of switches to function as if the multiple customers are being served by a single switch. The system of the present invention includes a gateway in communication with both a Public Switch Telephone Network and users of the private network; a call agent in communication with the gateway for processing different requests received at the gateway; a server-based interface including a Directory Server for translating between the Internet name (Network Address) and a Customer address and a Domain Name Server for translating between the Internet name (Network Address) and an Internet Protocol Address.

Virtual private network system and method using voice over internet protocol

A method is disclosed which brings together a combination of special IN features and techniques to allow Centrex stations supported by a plurality of central office switching systems, each at different locations, to function from the customer's perspective as though they were served by a single central office switch. The key to Virtual Wide Area Centrex is a total separation of the telephone numbers seen and used by customers (Customer Number Address--CNA) from the telephone numbers used internally by the network for call routing purposes (Network Node Address--NNA), such that there are two separate and distinct numbering plan domains. A central database, interconnected with each of the Centrex switches, maintains the mapping between CNA and NNA. This database is called upon, as required, to do both forward and reverse translations--i.e., from CNAs to NNA and vice-versa. The net result is that CNAs identify people (e.g., a customer's specific employees and agents) whereas NNAs identify locations (e.g., offices and conference rooms). This permits an environment in which individuals may move from one physical location to another, regardless of the serving central office switch, while keeping their CNA and their network access privileges.

Virtual wide area centrex

A method is disclosed for processing call data among telephone switching offices and a remotely located database system, called an SCP (Services Control Point), such that one large monolithic application at the SCP is shared among a very large number of individual services. Specifically, the disclosure pertains to the means of achieving the necessary service differentiation at the SCP, namely through: i) the use of a very powerful transaction processor, capable of addressing massive amounts of memory and dealing with large numbers of real time events; ii) the assignment of service-specific memory addressing ranges (identified hereafter as Numbering Plans, which can be either Open or Private) in one large monolithic application; iii) the use of service-specific search keys within Numbering Plans; iv) a rich common service logic tree, and common reference library, capable of being pruned down to match the service logic needs of individual services, and of individual customers within those services; v) rapid screen customization at the service provisioners' workstations to meet service-specific operations requirements; and vi) a criss-cross numbering plan table that enable services which require the caller's identity to maintain their integrity. The result is a matrix with all the services on one axis and all the service features on the other, such that the intersections of services and features can be customized by the Telco to meet specific service needs.

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Nepean, Canada

George W Turner