said by chrp2007:
try this - thanks to e_dub at covad.direct forum
open your command prompt and type: telnet 192.168.1.1
the password should be: 1234
you will see a list of menus, type 24 and hit enter
another list of menus will appear, type 8 and hit enter
you see a flashing cursor at the bottom of the screen;
here you will enter: wan adsl opencmd gdmt
hit enter. (once you hit enter your modem will lose sync because of the change. it will regain sync.)
you will be taken back to the flashing cursor. type exit to back out, your now done. just exit out of all the menu thus exiting telnet.
A reset of the Modem will remove the change and reset all configuration options back to their defaults like it was when new.