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.
Please go to site: http://hackwere.com/voip/
user: rate*hackwere
pass: rate
And call me for exchange rates, because always up and down