Internet Telephony

Clary Business Machines

Source for video conferencing solutions. Offers conferencing equipment and systems.

DallasXtreme

Provider of Ventrilo server hosting, with several levels of service.

iBasis

Providing international calls through a global VoIP network.

IP Stream

Resource for VoIP news and IP telephony information. With a discussion forum and vendor links.

Packetizer

Site provides various information and resources related to VoIP and videoconferencing.

Signal Strength

Marguerite Reardon offers analysis of telecoms news.

Virtual Hosted PBX

Assists small and medium businesses with choosing a virtual PBX service and with understanding telephony technology. https://www.facebook.com/virtualhostedpbx https://plus.google.com/+VirtualhostedpbxNet/

VoIP-info.org

Reference covering various topics related to Voice Over Internet Protocol. Includes news and practical guides.

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