Router
IP: Ext_A/10-12-07NAPT Router IP Addresse.g. 1.1.1.1
Phone System
IP: Int_B/84-26-01VoIP Gatewaye.g. 192.168.0.3
IP:Int_A/10-12-09IPL IP Addresse.g. 192.168.0.2
Port ForwardInt_A 5080:5081 → Ext_A 5080:5081Int_B 10020:10083 →Ext_A 10020:10083
RulesAllow access to 5080:5081 on Ext_AAllow access to 10020:10083 on Ext_AAllow access to 5080:5081 on Int_AAllow access to 10020:10083 on Int_B
NatStatic port mapping on udp 5080:5081Static port mapping on udp 10020:10083
UDP TimeoutsUdp timeouts should be set to 2-3 min