I have two RV320 setup via VPN and i have remote IP phones connected with port forwarding to the main site.  Issue i have is that i have to port forward RTP ports in the main site to the remote site that is on a different subnet.  The router wont let...

I am trying to find the settings so that I can setup a SPA525G as a 3rd party SIP phone on the NEC SV8100.Any help would be appreciated.Thank you