Have a Zyxel 841 and 841C modems operating together to complete a LAN between two computers 300 meters apart. The LAN was previously working for about a year but suddenly its not. Even when I connect the two modems together with a 1 meter wire I don't get the VDSL lights on the units lighting up. PS: the 841C modem has been operating in a very dusty environment.

Computers & Internet - Zyxel - Prestige 841C (P841C)