System and method for providing fault tolerant IP services

摘要

A system and method for providing fault tolerant IP services includes establishing a first communication session between an originating telephony device and an application server, through a primary call manager. Failure of the primary call manager may be detected. A second communication session between the application server and a destination telephony device may be established via a back-up call manager. The first communication and the second communication session may be coupled at the application server to establish two-way communication between the originating telephony device and the destination telephony device.