hi, I 've setup a 3cx on a LAN enviroment for testing. My setup is 2 IP Yealink T26P 3CX free 2sc licence I cannot perform any call between the 2 ip phones, or the IVR is not working. Fynny thing is that i can call the other extension but no voice And the system log mentions No RTP packets were received. So i believe that something is blocking RTP packets but everything is on a lan no firewall or anything. I ;ve disabled even the firewall in windows just in case What i did wrong ???