I take that back - buy either a cisco/scientific atlanta modem, or a motorola, always. Moto made the first docsis modems, and still generally make the best, otherwise cisco (!linksys). If not, it's a firmware incompat between the cmts and it, it has happened.I doubt you have a modem failure. I've never had a modem fail, and very few do - rather they are usually replaced because 1) someone missed a level issue somewhere, 2) they were blew out with lightning, or 3) you wanted a docsis 3.x modem for better speed.