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Combined H.450.2 and SIP call transfer

  • US 7,738,445 B2
  • Filed: 09/28/2005
  • Issued: 06/15/2010
  • Est. Priority Date: 05/05/2005
  • Status: Expired due to Fees
First Claim
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1. A method for providing a feature to a call in a SIP-based core network between a first user and a second user, said method comprising:

  • receiving by a call control element (CCE) a first INVITE message from an ingress border element, wherein said ingress border element interfaces an H.323 network with said SIP-based core network;

    invoking an application server to provide at least one feature to said call;

    invoking a media server to collect information associated with said feature from said first user;

    receiving by said CCE a REFER message from said application server, said REFER message comprising said information collected by said media server;

    sending said REFER message to said ingress border element;

    receiving a second INVITE message by said CCE from said ingress border element;

    determining by said CCE an address for a second user associated with an egress border element; and

    sending said second INVITE message to said egress border element.

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