How is exactly the IPv4 IP address under System Information (on the dashbosard) used in 3cx, specifically when it comes to establishing SIP and RTP? I don't want to use dynamic IP, and I have 2 IPS with 2 static public IPs. If it is registered with one ISP provider (Let's say public IP x.x.x.x), can I force a channel to a SIP provider with my second public IP address (let's say y.y.y.y), thus making the call sip and rtp go through my secondary ISP?
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