Administrator Manual OM Series IP Telephony System1-4 www.newrocktech.comFigure 1-5 Domain name setting interfaceThe WAN port of the router does not have a fixed IP addressGo to the Basic > Network page to enable STUN.Figure 1-6 Network setting interfaceTable 1-3 Network parametersItem DescriptionSTUNSelect a trigger for launching STUN inquiry: Startup: make inquiry for the SIP signaling when the App activated Periodical: periodically make inquiry Periodic & RTP: periodically make inquiry for both SIP signaling and RTP streamSTUN Server Enter the IP address of STUN server, such as 20.125.2.29.