IP Telephony data source. Includes VoIP vendor directory.
Web-to-phone call button for e-commerce.
Technical information about VoIP and videoconferencing.
SIP, 3G-324M, H.323 stacks and testing tools for VoIP vendors.
Provides enterprise telephony management systems.
Online VoIP technology guide. Includes forum and speed test.
VOIP Telephone Systems
Resource, technical information and services for VOIP telephone systems and installation.
A online guide to VoIP for the home user. Includes various types of VoIP setups.
Voice Systems Research, Inc.
Provides unified messaging, voice mail, advanced call routing, and IP-based telephony solutions.
Voice over Internet Protocol
An overview of VoIP from the Federal Communications Commission. With news, FAQs, factsheets, and findings.