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Convergence of circuit-switched voice and packet-based media services

  • US 7,899,164 B2
  • Filed: 12/24/2003
  • Issued: 03/01/2011
  • Est. Priority Date: 06/19/2003
  • Status: Active Grant
First Claim
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1. A method comprising:

  • a) receiving a first message indicating a call is being established from a first terminal;

    b) sending a second message to establish the call with a second terminal;

    c) sending a third message to provide information to establish a media session associated with the call, wherein the third message is sent over a packet network; and

    d) determining a state of at least one of the first and second terminals based on the call and providing presence information to a media client associated with one of the first and second terminals based on the state of the at least one of the first and second terminals.

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