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.
international voip wholesales:
mobile dialer & reseller for a2z country, a2z route, also voipswitch +mobile dialer+pc2phone all mode: cheap rate, contac me: ranju@live.com.bd or sales@rimi-telecom.net