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Mobile device calls via private branch exchange

  • US 7,742,584 B2
  • Filed: 03/21/2007
  • Issued: 06/22/2010
  • Est. Priority Date: 07/14/2003
  • Status: Active Grant
First Claim
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1. A method comprising:

  • receiving a dial request, via a data channel, from a first client device at a server;

    transferring a call initiation message from the server to a telephone server in response to the dial request;

    the server sending data representative of a transaction identifier and a call in telephone number for the telephone server to the first client;

    the first client initiating a first call leg with the telephone server, the first client calling the telephone server on the call in telephone number, and upon successfully connecting to the telephone server sending the transaction identifier to the telephone server;

    the telephone server is responsive to receiving the transaction identifier from the client to initiate a second call leg by placing a voice call to a second client device; and

    upon successfully establishing a voice call with the second client device, the telephone server joins the first call leg and the second call leg establishing a voice call between the first client and the second client.

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