Comtrend Corporation NexusLink 3120 User Manual page 189

STEP 2: The WAN IP settings screen provides access to the DHCP server settings.
You can select the Obtain an IP address automatically radio button to
enable DHCP (use the DHCP Options only if necessary). However, if you
prefer, you can use the Static IP address method instead to assign WAN
IP address, Subnet Mask and Default Gateway manually.
Click Next to continue or click Back to return to the previous step.
188