Digisol DG-HR3400 User Manual page 23

 Lastly, the router will reboot as shown below.
Static IP (Cable Modem users)
 Select Static IP Address if all the Internet port's IP information is provided to
you by your ISP. You will need to enter in the IP address, subnet mask,
gateway address and DNS address provided to you by your ISP. Each IP
address entered in the fields must be in the appropriate IP form, which are
four octets separated by a dot (x.x.x.x). The Router will not accept the IP
address if it is not in this format. Click on 'Next'.
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DG-HR3400 User Manual