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.
This is a computer system, which allows exchanging personal voice messages, delivering of voice information as well as for the processing of transactions linked with private persons, organizations, goods and services, with the help of the ordinary telephone.