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We intend to interconnect two PBXs in remote offices by VoIP. Both PBXs have H.323 (BRI QSIG) gateway cards installed. The data network to be used for VoIP is using NATing. Where as H.323 requires static IP addressing, how can VoIP be implemented in this situation?
The best option here is to get two VPN gateways, build a VPN between the two sites and allow the VoIP gateways to communicate over the VPN.