The following instructions were taken in part from https://kb.netgear.com/30773/How-to-set-DM200-into-bridge-modem-only-mode

Connect directly to your Netgear DM200. Your computer should be provided an IP address i.e 192.168.5.2

Connect to modem on 192.168.5.1 in a web browser.

Default Username : admin
Default Password : password

 

 

First check the firmware on the top right hand corner is at least v1.0.0.61. If it is then you can skip the firmware upgrade.

Download and follow the instructions from NetGear the latest firmware for the DM200. This guide used Firmware Version 1.0.0.61

Upgrade modem

Click on Advanced > Administration > Firmware Upgrade

Click Browse and “Locate and select the upgrade file on your hard disk. The click “Upload”

After reboot we need to setup as modem only with Passthrough VLAN.

Configuring Modem for Bridge Mode

 

 

Device even though you click Passthrough VLAN mode it will default to off.

When you click apply the modem will reboot and you will loose access to it. The only way to access is to manually set a static IP address on your computer i.e 192.168.5.2. The modem should now work with VDSL mode. You can now connect your router to the modem.