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Methods and apparatus for handling a communication session for an unregistered internet protocol multimedia subsystem (IMS) device

  • US 9,137,269 B2
  • Filed: 11/30/2012
  • Issued: 09/15/2015
  • Est. Priority Date: 01/31/2007
  • Status: Active Grant
First Claim
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1. A method comprising:

  • in response to receiving an internet protocol multimedia subsystem session initiation message from a user endpoint, determining whether the user endpoint is registered; and

    when the user endpoint is determined to be unregistered;

    determining whether the internet protocol multimedia subsystem session initiation message is directed to an exception endpoint by performing a lookup on a list;

    determining whether a profile for the unregistered user endpoint is available;

    when the profile for the user endpoint determined to be unregistered is unavailable, loading a default profile; and

    establishing an internet protocol multimedia subsystem session on behalf of the user endpoint determined to be unregistered when the internet protocol multimedia subsystem session initiation message is directed to the exception endpoint.

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