VIVA offers IP based Converged Communications Solutions. You may contact VIVA for SIP Trunking, IP PBX & PSTN integration, MS OCS & IP PBX integration, Managed VoIP and ''''Secure'''' VoIP.
iBasis is a leading carrier of international long distance telephone calls and provider of retail prepaid calling cards sold online and through retail stores throughout the U.S. We provide high quality service for billions of minutes of international call
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