said by TheBigCheese:
I had tons of problems with CDV and they eventually gave up trying to fix garbled and dropped calls while I was downloading so they installed a second modem and the problem went away but it was hell getting it fixed and getting Comcast to remove the cee they charged for service calls.
Thanks. What does the setup look like with a 'second modem', and which hardware models does yours use? An eMTA plus a standard cable modem? If so, I assume the eMTA is then used only for voice and the second modem for internet.