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.
Callnigeriaonline
Callnigeriaonline.com provides Nigerians around the world with the benefits of cost savings and high quality phone calls using Voice over Internet Protocol (VoIP).
Using software on your computer or VOIP routers with your dial-up or broadband interne
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