Patent ID: 7602704
Filing Date: 2009-10-13
Classification: H04L,H04M

Abstract:
1. A method for providing fault tolerant IP services, comprising: establishing a first communication session between an originating telephony device and an application server, using a primary call manager, wherein the application server is operable to route an incoming call from the originating telephony device to a destination telephony device; detecting a failure of the primary call manager before the incoming call is routed to the destination telephony device; maintaining a media communication link between the originating telephony device and the application server; establishing a second communication session between the application server and the destination telephony device using a backup call manager, the application server initiating the second communication session by communicating with the backup call manager; and coupling at least a portion of the first communication session and at least a portion of the second communication session at the application server to establish two-way communication between the originating telephony device and the destination telephony device.