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.
GMS TECNOLOGY (UK) LTD is a distinguished Internet Telephony Solutions Provider (ITSP) based in UK, serving clients all over the world.
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