System and method for establishing long distance call...

System and method for establishing long distance voice...

System and method for establishing long distance voice...

System and method for facilitating communication between...

System and method for feature-based services control using SIP

System and method for foreign agent control node redundancy...

System and method for gatekeeper-to-gatekeeper communication

System and method for generating multiple line appearances...

System and method for generating multiple line appearances...

System and method for gradual transition of local phone...

System and method for handling V.8bis signals for modem...

System and method for hierarchical switching

System and method for high capacity/failure tolerance...

System and method for history driven optimization of web...

System and method for implementing user-to-user data transfer se

System and method for implementing user-to-user data...

System and method for implementing user-to-user information...

System and method for implementing XoIP over ANSI-136-A...

System and method for improving communication between a...

System and method for increasing call capacity for a...