A:Answer The answer Dougie provided is not correct and yes he is not an expert and should not answer questions he doesn't know. Dougie shouldn't be making guesses confusing people .
To answer your question, the answer is NO. If you have your heart set on the 7700 series, the Motorola 7711 has two voip phone ports for Xfinity's triple play. For me, I don't subscribe to Xfinity's triple play, and I use this modem/router 7700. I do use voip phone service, but I've been with Vonage since beta, I have no plans to use Xfinity's Voip service, and this modem/router is a good one for my needs.