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.
The service provides the information regarding the incoming SMS, voice or email messages. At the moment when the message comes, the telephone plays a signal. The system also allows setting filters, thus, allowing you to choose, which messages to inform you about and which to ignore.