I have manually set an IP address to use in Contact and Connection SIP fields under Edit Voip Provdider>Advanced. I can see that this IP is being used as Contact Host Part when 3cx sends 180 Ringing but not when sending 200 OK/SDP. Instead the "external IP" is being sent. We have multiple WAN connections for voice so I cannot change the external IP. Is this a bug? Is there a way to override this behavior. Thanks!