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user_htd8tc
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Thursday, February 19th, 2026 11:22 PM

Is my modem properly provisioned?

I recently upgraded my internet service from the 1.2 Gig tier to the 2 Gig tier. My account shows 2 Gig / 250 Mbps service. My (customer-owned) modem is locking upstream channels only up to 36 MHz, indicating low-split plant. My upload caps at ~40 Mbps and download caps at ~1.13 Gbps. This indicates to me that I'm still on the 1.2 Gig tier. Please confirm whether my node is upgraded to mid-split and whether customer-owned modems are eligible for the 2G enhanced profile.

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5 months ago

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Enchantech

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5 months ago

If you own your own modem it must be capable of supporting DOCX 3.1 High Split speeds with greater than 200 Mbps upload.  There are only a few on the market currently and they are in short supply.  Netgear CM3000 being one that is available.

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user_htd8tc

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Thanks for leading me in the right direction. Actually, my modem is a Motorola MB8611, which is a DOCSIS 3.1 modem, and it's capable of 2.5G downloads and (theoretically) 800M uploads. It was on Comcast's list of approved equipment for multi-gig internet, but your comment prompted me to recheck the list. Comcast says my modem is NOT OPTIMIZED for my service plan. So. Mystery solved.

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5 months ago

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EG

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5 months ago

@user_htd8tc 

What is the exact make and model number of your modem ?

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user_htd8tc

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@EG​ Motorola MB8611, but a previous comment prompted me to revisit Comcast's list of approved modems. The Motorola MB8611 is not on the list for 2G tier. Thanks for commenting.

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5 months ago

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XfinityMartyR

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user_htd8tc Were you able to find a modem that is compatible for our enhanced speeds? We can also get you a Xfinity Gateway to try out. 

 

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please mark as Best Answer.tick

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5 months ago

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