Hersent, Olivier. , Beyond VoIP protocols : understanding voice technology and networking techniques for IP telephony / Olivier Hersent, Jean-Pierre Petit and David Gurle. - xxii, 261 pages : illustrations ; 25 cm. ISBN: 0470023627 Subjects--Topical Terms: Internet telephony.Speech processing systems. LC Class. No.: TK5105.8865 / .H464 2005