Wow, what a coincidence. My neighbor on DSL had exactly that issue. Let me ramble about what transpired.

He called me up and I came over. I pointed a web browser at the Westell 327w dsl/wifi/router and it asked for the name and password. It didn't like what we had used before. No where in the documents was the default name and password. To help you fast forward the common name and passwords are "admin" for the user and either "admin" or "password" for the password.

After that hurdle we had to resetup the dsl modem/router to his account and it came back to life with the internet light back on.

Later it died but there was some heavy storms in the area the day before the 327w forgot all its settings.

Their internet connection was restored but was sluggish to non-existent so a call was made. I loaned him my old DSL modem and router which worked just fine so my call was the 327w had expired.

The DSL people sent out a tech and after 4 hours of checking wires, installing a new "home run" the modem was still not working proper and they decided the modem was indeed dead. The new modem arrived and after setup all is well again.

Bob