Patent ID: 7230945
Filing Date: 2007-06-12
Classification: H04L,H04M,H04Q

Abstract:
1. A method for sending a dual-tone multi-frequency signal using a voice over Internet protocol, comprising the steps of: setting up a user datagram protocol port for transfer of dual-tone multi-frequency data between a voice over Internet protocol gateway and a voice over Internet protocol client; allowing said voice over Internet protocol client to request said voice over Internet protocol gateway to send information regarding a digital signaling processor channel currently established therein, when a caller inputs a numeral key in a voice over Internet protocol-based call connection state; allowing said voice over Internet protocol gateway to retrieve the currently established digital signaling processor channel information on the basis of an Internet protocol address of said voice over Internet protocol client and to send the retrieved digital signaling processor channel information to said voice over Internet protocol client; allowing said voice over Internet protocol client to send dual-tone multi-frequency data corresponding to the inputted numeral key to said voice over Internet protocol gateway through the set-up user datagram protocol port; and allowing said voice over Internet protocol gateway to receive said dual-tone multi-frequency data from said voice over Internet protocol client through said user datagram protocol port, to generate a dual-tone multi-frequency signal corresponding to the received dual-tone multi-frequency data, and to send the generated dual-tone multi-frequency signal to a counterpart of said voice over Internet protocol client.