Patent ID: 6775270
Filing Date: 2004-08-10
Classification: H04W

Abstract:
A method for improving a quality of voice signals exchanged via a circuit switched network between audio devices, comprising the steps of:sending a call request message from a calling party's audio device to a first line/network interface switch, said call request message identifying at least one voice compression algorithm supported by said calling party's audio device; receiving said call request message at said first line/network interface switch; sending said call request message from said first line/network interface switch to a second line/network interface switch via the circuit switched network; receiving said call request message at said second line/network interface switch; sending said call request message from said second line/network interface switch to a called party's audio device; receiving said call request message at said called party's audio device; sending a response message from said called party's audio device to said one of said first line/network interface switch and said calling party's audio device via the circuit switched network, said response message indicating whether said called party's audio device is able to support said at least one voice compression algorithm; and exchanging voice signals between said called party's audio device and said calling party's audio device via a data network, if said called party's audio device is able to support said at least one voice compression algorithm.