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.
Fax, SMS, Callback, Callthru, SIP-Calling worldwide.
Installation and maintenance of easy to complex Asterisk servers. Hosting of Asterisk Servers.