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Voicemail notification

  • US 8,559,604 B2
  • Filed: 09/24/2007
  • Issued: 10/15/2013
  • Est. Priority Date: 09/24/2007
  • Status: Active Grant
First Claim
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1. A method comprising:

  • submitting an extension call request to a telephony system, wherein the extension call request identifies a recipient extension;

    receiving a return message from the telephony system in response to the extension call request;

    determining whether the recipient extension is currently associated with the telephony system based on the return message received from the telephony system;

    documenting an association between the recipient extension and the telephony system if the recipient extension is currently associated with the telephony system;

    wherein the extension call request comprises a Skinny Client Control Protocol (SCCP) offhook message identifying the recipient extension;

    wherein the return message received from the telephony system comprises an SCCP dialtone message if the recipient extension is currently associated with the telephony system; and

    wherein the return message received from the telephony system comprises an SCCP dialtone denial message if the recipient extension is not currently associated with the telephony system.

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