This is a device allowing a user to make VoIP calls using session initiation protocol (SIP). SIP is a telecommunication technology developed as a fast, easy standard for delivering IP-based data, voice, and video communications.
VoIP Corporation
VoIP is a world-class communications company, owns and operates one of the largest IP networks in the world, extending service access to more than 190 countries worldwide. VoIP offers customers with a complete suite of innovative voice, fax and video IP
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