Click WAN/WAN Settings, and set correct settings to SIP gateways corresponding to your NAT router. The settings in the following image is suitable for LevelOne
Please avoid the possible IP conflict in your LAN environment.
After setting, please click “Reboot” at the left menu and connect your computer to router. And you can configure the SIP Gateway by typing the new set IP address in your web browser.
Please be noted that once the settings are changed, you must click “Reboot” at the left menu for the changes to be effective.
For all the other web page settings, “Reboot” is also required for the changes to be effective.
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