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Address definition for IP telephony services

  • US 7,492,775 B2
  • Filed: 01/22/2004
  • Issued: 02/17/2009
  • Est. Priority Date: 07/29/1999
  • Status: Expired due to Fees
First Claim
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1. A method for establishing a telephone call, comprising:

  • receiving telephone number information that includes a telephone number and a nature of address indicator;

    mapping the telephone number information to a session initiation protocol format to form a session initiation protocol message that includes a nature of address indicator;

    establishing the telephone call based on the nature of address indicator in the formed session initiation protocol message;

    receiving a session initiation protocol message that includes a nature of address indicator;

    mapping the received session initiation protocol message to a call establishment request of a different format, where the call establishment request includes nature of address indicator and where the different format includes one of a signaling system 7 format, an integrated services digital network format, an integrated services digital network user part format, or a channel associated signaling format; and

    establishing a second telephone call based on the nature of address indicator in the call establishment request.

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