I had problems with getting my router to work for the umpteenth time. The frontier person acknowledged the 6100 being a problem. She also stated they have been getting a lot of problems with it intermittingly dropping the connection and having problems.
The agent said based on the problems I have been having, she would send me a new modem. The Westell 7500.
I hope this helps me. Perhaps asking for that might help you. I find Frontier tech to be much more understanding then Verizon was.(And they are in the US).
Our Westell 6100 modem keeps dropping the connection. This happens most frequently when the computer is running. When the computer is off all of the modem lights are usually on. It either repeatedly drops the connection intermittently or it will just go out for an hour or so, then come back on and seem to be fine. This started about two weeks ago. We run Win XP.
Frontier (formerly Verizon) sent two technicians to our home a week ago. They checked everything with the phone lines, found no problems so they rewired our jacks to separate the data from the phone which eliminates the need to use phone filters. This seemed to help some but hasn't given us a reliable connection. They said they felt the problem lies between the outside phone box attached to the house and the jacks in the house. Nothing has changed with the house in thirty years.
I saw on a similar post the suggestion to upgrade the modem software at: www.verizon.net/versalinkupdate. The modem model number they have listed is off one digit from our model number. They have listed: E90-611015-06, ours is a 610015.