Providing Touch-Tone Services in Voice Over Packet Networks
Julian Penketh · 2000
Abstract: For increased bandwidth savings in packet networks, speech compression algorithms are applied to reduce the amount of data that needs to be transferred to adequately reconstruct a telephone signal at the receiver. However, such algorithms do not process pure tones (such as dual-tone multifrequency (DTMF)) with high fidelity, hence all signalling tones must be detected before packetization occurs. This paper presents the areas currently under or being researched related to the transfer of DTMF tone data across ATM networks.