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System and method for providing fault tolerant IP services

  • US 7,602,704 B2
  • Filed: 08/20/2002
  • Issued: 10/13/2009
  • Est. Priority Date: 08/20/2002
  • Status: Active Grant
First Claim
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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.

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