Visitor

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3 Messages

Monday, November 10th, 2025 2:00 PM

Are MOCA adapter supported between the Xfinity ONT and Xfinity modem

Hello.

In August, I had new fiber service run to the house. The builder had the electricians run coax from the basement to the office assuming that would be needed. The install went fine and the system is working well. The challenge is trying to move the modem from the basement to the main floor. I purchased two ECB7250 MOCA adapters from ScreenBeam. The connectivity that I'm attempting is: Fiber from pole to Xfinity ONT, Ethernet to ECB7250, coax to ECB7250, Ethernet to Xfinity modem. I have a ticket open with them regarding their devices, but can you tell me if this is generally supported by you?

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Official Employee

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1.7K Messages

19 days ago

Good morning! Thanks for reaching out to community here on our Xfinity Forums. I'm happy to read that the installation went well and that you had the lines pre ran. During the installation did you check with the technician if the modem could be moved to the main floor through coaxial since the ONT would have the fiber converted to coaxial. 

For the moca side of things the gateway should have moca enabled by default, but our demarc would stop at the gateway for support. 

Visitor

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3 Messages

Thanks Paula! The ONT won't change. It's currently fiber in and Ethernet copper out to the modem. In this case, the Ethernet would go to the MoCA adapter Like this. 

Fiber --> ONT --> Ethernet --> MoCA --> coax --> MoCA --> Ethernet --> Xfinity Modem

I verified from the MoCA manufacturer that it should just be a passthrough, but something is wrong since the modem never really connects to the Internet in that setup.

Official Employee

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1.7K Messages

@user_9km3qw Thanks for sharing the connection plan. If you have the ONT to the modem, Do you have a solid connection there? 

@EG thank you for sharing your knowledge on these connections.

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Expert

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114.7K Messages

19 days ago

@user_9km3qw 

If that particular ONT outputs Ethernet, that setup will work.

(edited)

Visitor

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3 Messages

Thanks for the reply and validation.

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