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Welcome to voip.about.com, your guide site to everything Voice Over IP, also called VoIP, IP Telephony or Internet Telephony. Learn how to make free or cheap local and international calls using your PC or phone. Stay updated on VoIP hows and whats, V...

3CX VOIP PBX - provides an easy to use, plug and play SIP - IP PABX for Windows. With a software based IP PBX you will save on PBX maintenance and halve your phone bill. Download the FREE edition today and break free from your proprietary phone syste...

VoIP Fax server solutions for Enterprise, small business and carriers. Fax SIP trunking, virtual fax server, fax machine, fax ata, email-to-fax, fax-to-email, SIP T.38 and IP fax trunking solutions

Kapanga Softphone is the premier SIP software phone integrating voice, video and fax over IP communications in one single application. Kapanga Softphone lets people make phone calls, video calls and send and receive fax while connected to a Voice ove...

Overclockers: The Performance Computing Community

SourceForge.net. Fast, secure and free downloads from the largest Open Source applications and software directory

Cisco (NASDAQ: CSCO) is the worldwide leader in networking that transforms how people connect, communicate and collaborate.

Vonage offers international, local, home and business calling with no annual contracts. VoIP phone service plans start at $9.99/mo. Get more with Vonage.

Axacore provides ready to deploy Windows fax server and appliance solutions for document management, imaging and fax technology.