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The Award Winning Business Phone Service over the Internet. OnSIP business VoIP service is a hosted pbx system that allows you to streamline your business communications. There’s no phone company hassle, no phone system to buy or manage, no contracts

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...

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

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...

Get help for your BlackBerry smartphone, server product, or development or theme software on BlackBerry.com. Find manuals, guides, and instructions to help you succeed with your BlackBerry products.

Valcom specializes in Real Time IP Voice and MultiModal Communication Systems for Education, Government, Military, Healthcare, Transportation, Commercial and Industrial Industries.

Enabling network and VAS solutions with Session Border Controllers, Media Servers and Video Gateways.