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.
CallTower`s hosted IP telephony services offering encompasses calling and connectivity; next-generation unified messaging; advanced applications; network services; and software, hardware and management services.
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