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Methods and systems for using DNS-dip to select codec for a communication session

  • US 9,391,889 B1
  • Filed: 08/19/2013
  • Issued: 07/12/2016
  • Est. Priority Date: 08/19/2013
  • Status: Active Grant
First Claim
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1. A method comprising:

  • receiving, by a proxy server, a computer-readable invitation specifying a destination and multiple codecs supported by a source of the computer-readable invitation;

    requesting, by the proxy server and from a domain name system (DNS) server, a record associated with the destination specified by the computer-readable invitation;

    receiving, by the proxy server in response to requesting the record, multiple records identifying a respective gateway to the destination specified by the computer-readable invitation;

    selecting, by the proxy server and from among the gateways identified by the multiple records, a first gateway to the destination identified by a first record of the multiple records, wherein selecting the first gateway is conditioned on the first gateway supporting a most-preferred codec among the multiple codecs supported by the source of the computer-readable invitation and being identified among the multiple records; and

    routing, by the proxy server, the computer-readable invitation towards the first gateway to the destination.

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