» 1888usa.com
   Lists free fax and phone resources on the web.
   http://www.1888usa.com

» IP Telephony Literature Survey
   A literature survey covering architectural, protocol, and quality requirements for deploying an IP Telephony service.
   http://www.cs.berkeley.edu/~mccaesar/research/iptel_litsurv.html

» IP xStream
   IP Telephony data source.
   http://www.iptelephony.org

» Inter-Fone - VoIP Internet Telephony
   Internet-carried Phone to Phone calls.
   http://www.inter-fone.com/

» Internet Telephony: America Is Waiting
   FCC Chairman Kennard's remarks before the Voice Over Net Conference; Atlanta, Georgia; September 12, 2000.
   http://www.fcc.gov/Speeches/Kennard/2000/spwek019.html

» Iscom, Inc. PCCall Service
   PC to Phone call services.
   http://www.iscom.net

» NetYak
   Web-to-phone call button for e-commerce.
   http://www.netyak.com

» Packetizer
   Technical information about VoIP and videoconferencing.
   http://www.packetizer.com/

» RADVision
   SIP, 3G-324M, H.323 stacks and testing tools for VoIP vendors.
   http://www.radvision.com/

» SecureLogix Corporation
   Provides enterprise telephony management systems.
   http://www.securelogix.com

» TEK DigiTel Corporation
   Provides communications solutions for the small to medium size business by integrating traditional PBX technology with data routing and VoIP technology.
   http://www.tekdigitel.com/

» VOIP EZ
   Offers in depth information on implementing VoIP in both consumer and commercial settings.
   http://voipez.com/

» VoIP Watch
   A weblog with news and reviews of VoIP products.
   http://andyabramson.blogs.com/

» VoIP Wiki
   A wiki that covers VoIP software, hardware, service providers, reviews, configurations, and standards.
   http://www.voip-info.org/wiki/

» VoIP.org.uk
   UK resource with the emphasis on small businesses and home users. Includes news, reviews, and forums.
   http://www.voip.org.uk/

» Voice Systems Research, Inc.
   Provides unified messaging, voice mail, advanced call routing, and IP-based telephony solutions.
   http://www.vsrusa.com/

» Voice over IP and IP Telephony References
   A directory of talks, papers, books, organizations, vendors, standards, web pages, and standards on IP telephony.
   http://www.cs.wustl.edu/~jain/refs/ref_voip.htm

» Voice over Internet Protocol
   An overview of VoIP from the Federal Communications Commission. With news, FAQs, factsheets, and findings.
   http://www.fcc.gov/voip/

» Wikipedia: Voice over IP
   Encyclopedia article with background information, technical details, and the advantages and disadvantages of VoIP.
   http://en.wikipedia.org/wiki/Voice_over_IP

» iBasis
   Provider of wholesale international IP telephony services.
   http://www.ibasis.net