I just bought the Actiontec GT784WN to replace my older Actiontec GT724R. When I plug it in, the DSL light blinks constantly. I don't think it's a problem with the line, because the older one can still connect to the internet. It just doesn't have wireless support, which is why I replaced it. I can't figure out why this newer one isn't working when the old one, being nearly identical, does. The DSL service is from AT&T, and has been active for years.