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Network entity for interconnecting SIP end-points of different capabilities

  • US 7,554,927 B2
  • Filed: 09/07/2004
  • Issued: 06/30/2009
  • Est. Priority Date: 09/29/2003
  • Status: Expired due to Fees
First Claim
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1. A method for operating a Session Initiation Protocol (SIP) network entity in a communication channel between a first SIP user agent and a second SIP user agent in a packet based communication network with available a first set of communication features supported by the first SIP user agent and available a second set of communication features supported by the second SIP user agent, including at least one communication feature in the second set of communication features which is not supported by the first SIP user agent, comprising:

  • acting as a client application for the first SIP user agent and as a server application for the second SIP user agent; and

    arranging to exchange signaling information with the first and second user agents to enable the second SIP user agent to utilize the at least one communication feature which is unsupported by the first SIP user agent during communications with the first SIP user agent.

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