Substitution & convergence : Is there a future for fixed telephony? / IDATE
Consumer VoIP [documento electrónico] : the market opportunity / Mark Main
The basics of voice over Internet Protocol / Frank M. Groom and Kevin M. Groom
Business VoIP market : opportunities & challenges / Fréderic Faivre, Julien Grivolas, Bruno Teyton
Modern cable television technology : video, voice, and data communications / Walter Ciciora...[et al.]
VoIP and enhanced IP communicatons services / International Engineering Consortium
Getting off the ground : why the move to VoIP is a decision for all CXOs / ed. Deloitte
Value-added voice services [documento electrónico] / ed. Ovum Consulting
Premium voice services in 2004 [documento electrónico] / Angel Dobardziev