HEATKEYS

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...

The fastest and easiest way to get a SIP account for free video calling over the Internet. Register your SIP address with any VoIP phone or use our free internet phone for secure calling.

Linphone, Free SIP VOIP client, open-source voip software for Linux, windows, mac, iphone, android. Free sip voip sdk.

Our toolkits, softphone SDKs, provide much more than just SIP, voice and video: we have integrated the latest standards for optimized NAT traversal (ICE), security (TLS and SRTP) as well as all advanced SIP scenario (supervision, call transfer, call ...

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Internet phone service for your home or office. Pay per call and Unlimited rate plans, phone numbers worldwide. Sign up for a free account today.

VoIP Service Provider Home Phone Internet Phone Service Small Business SIP Trunk Solutions Free Cheap International Calls Virtual Number.

SIPSorcery is a combined SIP service and web application that can manage all your SIP devices and SIP providers.