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use t25 from xfinity on optimum

  • October 30, 2022
  • 7 replies
  • 192 views

Bought a t25 supposedly compatible with optimum, but was used for xfinity.  Optimum could activate it, but no phone ot internet worked

Best answer by plemans

so the t25 has 2x ethernet ports but the vast majority of ISPs only support 1 connected device. 

So try this. 

Power off the modem and the router. Disconnect everything from both even the coax from the modem. 

Wait at least 2 minutes. 

Connect the coax back to the modem. 

Turn it on and wait 2 minutes. 

Connect port 1 on the modem to the wan port on the router. 

Power the router on and wait 2 minutes. 

Try to run the internet setup on the router. 

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7 replies

plemans
Juggernaut
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  • Juggernaut
  • 2219 replies
  • October 30, 2022

Have you had them try to re-provision it? I’ve seen ISP’s send the wrong provisioning or it not go through. 


  • Author
  • The Many
  • 3 replies
  • October 30, 2022

Since I tried switching from a different model cable modem, I assume they had to provision it.  I know they had to activate it.  I don't know what they do internally, though.


plemans
Juggernaut
Forum|alt.badge.img+41
  • Juggernaut
  • 2219 replies
  • October 30, 2022

Did you contact them to see if they can reprovision it? or check its status if its acdtivated?


  • Author
  • The Many
  • 3 replies
  • October 30, 2022

Yes, they activated it and could see it online (and control it for reboot), but could not see my router nor phone connected 


plemans
Juggernaut
Forum|alt.badge.img+41
  • Juggernaut
  • 2219 replies
  • Answer
  • October 30, 2022

so the t25 has 2x ethernet ports but the vast majority of ISPs only support 1 connected device. 

So try this. 

Power off the modem and the router. Disconnect everything from both even the coax from the modem. 

Wait at least 2 minutes. 

Connect the coax back to the modem. 

Turn it on and wait 2 minutes. 

Connect port 1 on the modem to the wan port on the router. 

Power the router on and wait 2 minutes. 

Try to run the internet setup on the router. 


  • Author
  • The Many
  • 3 replies
  • October 30, 2022

I believe we tried a lot of these combinations, spending almost 2 hours to no avail.  Elsewhere on the net I read that it won't work since each cable company has its own firmware.  I didn't ask them to 'push their firmware' since I wasn't aware of this at the time.  I'm dreading spending another 2 hours without first getting all the facts. It's worth renting their modem compared to the hours I've put in, but willing to give it one more shot if they can push their firmware.


plemans
Juggernaut
Forum|alt.badge.img+41
  • Juggernaut
  • 2219 replies
  • October 30, 2022

Their “Firmware” is part of the provisioning when they provision it. 

 


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