Patent ID: 7903635

Claim:
A method for dual-tone multi-frequency detection in a Voice over Internet Protocol (VOIP) network, comprising the steps of: configuring a Voice over Internet Protocol call server as an intermediate node in a signaling path of a Voice over Internet Protocol call between a first telephone device and a second telephone device; configuring a packet engine in a bearer stream between the first telephone device and the second telephone device; determining, by the packet engine, which packets of the bearer stream include dual-tone multi-frequency digits; determining, by the packet engine, via a buffer and an inter-digit timer utilized by the packet engine, a start and a stop of patterns associated with the dual-tone multi-frequency digits in order to differentiate a feature invocation digit pattern from the dual-tone multi-frequency digits; reporting, by the packet engine, a dual-tone multi-frequency event to the call server in response to determining the start and a stop of patterns associated with the dual-tone multi-frequency digits.