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Proper Modem-Router with Voice Phone to Replace Xfinity Installed Modem-Router with Phone

  • July 25, 2025
  • 1 reply
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P
The Many
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I have just switched Internet, TV and Phone to Infinity from Verizon (also wireless but that it not relevant here). 

The Xfinity service team installed its proprietary modem-router into which they plugged my telephone cord into the back of the modem-router.  The phone works fine as do the modem and router.

I would like to buy a modem-router rather than rent the one that I have received dfrom Xfinity.  But I want to be certain to buy the right modem-router -- one into which my voice telephone can also be plugged so that it also works. 

I would be most grateful for recommendations of the right model modem-router with voice phone plug for my application. 

If you need more information to respond, please let me know what I have left out. 

Many thanks. 

Peter

Best answer by plemans

Here’s their device list that has a column for phone support. Its pretty rare and none of the next gen devices with increased speeds. 

https://assets.xfinity.com/assets/dotcom/projects/cix-4997_compatible-devices/2025.03.25%20Full%20List%20of%20Compatible%20Devices.pdf

 

If it was me, I’d switch my phone over to a VOIP solution like ooma and get rid of the need for an integrated phone option. then you could do a simple modem/router combo device or just a modem separate from a router (my preference). It’d broaden your options greatly. 

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    plemans
    Juggernaut
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    • plemansJuggernaut
    • Juggernaut
    • Answer
    • July 26, 2025

    Here’s their device list that has a column for phone support. Its pretty rare and none of the next gen devices with increased speeds. 

    https://assets.xfinity.com/assets/dotcom/projects/cix-4997_compatible-devices/2025.03.25%20Full%20List%20of%20Compatible%20Devices.pdf

     

    If it was me, I’d switch my phone over to a VOIP solution like ooma and get rid of the need for an integrated phone option. then you could do a simple modem/router combo device or just a modem separate from a router (my preference). It’d broaden your options greatly. 

    Current setup: Netgear CM3000-->Netgear RBE973S-->2.5gig tp-link switch, Xfinity 2.4gig/350mbps
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