A:AnswerIt does not have DVR capability but will work with DVRs such as Amazon Fire Recast. It is compatible with Comcast internet as that is what I have and it works well.
A:AnswerAny router will work. This is just a modem, then take the signal to feed a router. This does not have a build-in wifi router. Some modem have build-in router, but not this one. External wifi router is better anyway.
A:AnswerIt is not for voice. It is a bridge modem. That is a modem only. Most people would use the MB7631 with their choice of a router. The MB7621 does not include a router and does not have a phone adapter.
A:AnswerBefore buying a modem ensure you check the list of approved devices for your cable/internet provider..
IMO Buying new equipment is safer than buying used..
A:AnswerThe upload and download maximum speed is the difference. I had 8x4 and the 8 down was topping out at around 80mbps for me. My plan was up to 110mbps down. With the 24x8 your modem has the potential of better speeds. However 24 on the down is WAY over what I'm paying for so I doubt I will really get a fast enough package to take advantage of that. I think it would be 500mbps or more before it would top out. You would likely need near gigabit speed to really push limits of the modem for the download speed.
A:AnswerShort answer:. No
This is strictly a cable modem. I paired it with a TP-Link Deco M5 mesh wifi router to completely cover my house in wifi coverage.
Your xfinity cable modem is very likely a combined cable modem and wifi router. What you need is a wifi extender (s) to improve your wifi coverage. You can also call xfinity and ask about extenders as I believe they supply them as well.
Good luck.
A:AnswerYour service provider should have information on their website regarding which devices are certified to work with certain types of connections and service plans. Check with your provider!
