SVG2482AC is a modem/router combo device with voice facility but this is not docsis 3.1 it is docsis 3.0 and compatible with Xfinity

I saw that.  I want to upgrade to docsis 3.1  Looks like I will need to get two separate units.   Thanks

Arris has the modem which is compatible with Xfinity digital voice process is SVG2482-AC, but that model is DOCSIS 3.0.

Arris has T25 compatible with Xfinity digital voice process but that even under DOCSIS 3.0 and its cable modem, you need to connect router to access the Wi-Fi internet.

You’ll need at T25 with a Wi-Fi router.  Here’s the list of SURFboard Xfinity voice product line https://www.surfboard.com/products/xfinity-voice/