2 techs came out today and couldn't figure out the problem and didn't have any modems with them so they had to schedule yet another call for next week. I can't take another day off from work so I bought a Motorola SB6121 modem and it bonds on 4 downstream channels! I am getting excellent speeds now. I will be returning the Thomson modem supplied by Mediacom early next week. Here are ,y speeds now: