This modem replaces a slower modem from Comcast.

One of the best modems arris makes

I have internet service through Optimum (Cablevision/Altice) and this modem was compatible and worked like a charm

This modem does work.

Great Telephone/Internet modem for use with Xfinity/Comcast

This is designed to work as a modem for Comcast including Xfinity voice

I just needed a telephone capable modem for voice service and it works perfectly

My cable company said my TM722 Modem was getting obsolete and slowing down my internet access

I just needed a telephone capable modem for voice service and it works perfectly