Includes information on what makes VoIP possible, what systems are used, the different standards, and more.

Trade publication providing insights and news on voice over IP trends, products, and providers.

Voice over IP industry news, analysis, opinion, and emerging trends.

Source of information on IP telephony providers and related VoIP services worldwide.

Features articles, reviews, and advice on Internet telephony-related hardware, software, and service providers.

Features articles and information about IP telephony technology.

Provides a variety of VoIP Internet phone service plans and rates. Serving residential and business customers.

Discussion forums, news, reviews, FAQs, and links for Vonage broadband phone services.

Web phone service provider offering PC-to-PC and PC-to-phone calls over the Internet.

Offers a definition of the term and recent news about voice over IP telephony.