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drh4625's avatar
drh4625
Follower
Aug 31, 2021

X4S AC3200 Compatibility with Xfinity VoIP

Prior to commiting to Xfinity for a VoIP conversion is this cable modem compatable for a landline configuration?

2 Replies

  • plemans's avatar
    plemans
    Guru - Experienced User

    No, the C7800 doesn't have a voice component. You can add an aftermarket like Ooma but not one from your ISP. 

    The compatible modem/router/voice for xfinity is the C7100V.  But its only docsis 3.0 and not 3.1. 

    Or you could get a modem with voice (like the CM1150V) and use your own router. Then you'd have docsis 3.1, a voice component, and a router that you controlled the firmware on and not your isp (like the combo devices)

    • michaelkenward's avatar
      michaelkenward
      Guru - Experienced User

      plemans wrote:

      Or you could get a modem with voice (like the CM1150V) and use your own router.

       


      An option favoured by many people who don't like a combined modem/router, partly because it gives you a much better choice of router features.