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.
Roitel LLC
Roitel LLC delivers Voip services at affordable price. We specialize in delivering telecommunication services using next generation technologies. Our state of the art network is capable to accept and route customer calls from all over the world. Based on
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