I have an Zytel EQ-660r modem for my CenturyLink(was Embarq) 1.5Mbps DSL service. The modem is currently using the G.DMT standard. If I upgrade the service from 1.5Mbps to "up to 10Mbps" before updating the modem what will happen. Will I get: 1. still 1.5Mbps. 2. the best speed the modem can do, possibly the max of the G.DMT standard, 8Mbps. 3. a nonfunctioning service. Modem is totally incompatible with the service. 4. or something else. Thanks, I'm usually fairly tech savvy, but my knowledge of DSL Service is piecemeal, and I don't want to make a change that losses me internet access. Note I am trying to update the modem, but so far I haven't had much success getting the new modem to integrate with my network the way I want it to. That would be another set of questions, and I'm sure a much longer post. I mostly want to know if I could get possibly the 8Mbps or if the modem would be totally incompatible. Thanks again.