Don't confuse Vonage with voice services provided by a cable company. Apples and oranges. Vonage uses the internet, a cable modem only uses the cable lines for VoIP. At their head end or office their switch connects you with normal telco provided facilities. Usually cable voice service is quite good.
I know the difference, just when Comcast can keep my cable modem and TV up for a week-straight... (Once again, it's the end of the world as we know it, and i feel fine.)
Ian A.
