4 Messages
Slow upload speed: 35Mbps vs 200Mbps (plan)
Hello,
I am on Gigabit Extra Plan that promises Download speeds: up to 1200 Mbps and Upload speeds: up to 200 Mbps. I own Motorola MB8611 modem + UDM Pro. I am getting 1200-1300Mbps and only 35Mbps download speed. How to fix it?
Regards,
German M.
Andyr1
Gold Problem Solver
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8K Messages
1 year ago
If the higher upload speeds are actually available, you currently MUST use a Comcast gateway. I don't think they have started allowing customer-owned modems from using the OFDM upstream signals used for the higher upload, yet.
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EG
Expert
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110K Messages
1 year ago
@user_l44mh6
These are the compatible customer-owned devices for the next gen. speeds;
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XfinityArmand
Official Employee
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2.1K Messages
1 year ago
Hi there @user_l44mh6! Thanks so much for taking the time to reach out to Xfinity Support here on out Community Forum to voice your service concerns. We are so glad to hear from you and want to help in any way that we can to get this taken care of for you. No worries! You have reached out to the right team and we are here to ensure that all of our subscribers have the best experience with their services. Please feel free to shoot us a private message so that we can get to work on this for you.
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BruceW
Gold Problem Solver
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26.3K Messages
1 year ago
For reference: https://www.reddit.com/r/Comcast_Xfinity/wiki/knowledgebase/next-generation-internet/
Please be aware that there are 2 kinds of responses in this Forum: Replies and Comments. When you Comment on a post by scrolling down to "Comment on this post here...", I am notified of your response. But if you select Reply, I am NOT notified and may not be aware of your response.
(edited)
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U9ly
7 Messages
1 year ago
AM HAVEING SAME ISSUE
1200 RX / 200 RX
my sppedtest max is 900 rx and a hard 40Mbps
my modem is a Motoroal MB8600.... so i clearly should not have issue
just had a tech here ....cleaned up signal a bit...so now down breaks 900...however the upload still is a hard 40 mbps
tech still wants to say it is my modem...i feel...not possible...we are being throttled....
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Andyr1
Gold Problem Solver
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8K Messages
1 year ago
The MB8600 is not currently approved for the higher upstream speeds. Only Comcast gateways and a few modems mentioned a few posts back are currently approved. Hitron Coda and Coda56, Netgear CM3000 and CBR750, Arris G54.
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U9ly
7 Messages
1 year ago
https://approvedmodemlist.com/comcast-xfinity-approved-modems/
[Edited: "Amazon link"]
am still finding this issue vary difficult
(edited)
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Andyr1
Gold Problem Solver
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8K Messages
1 year ago
The high upstream speeds use a new method called OFDM to send the data. Although it has always been part of the DOCSIS 3.1 specifications, it's only now being rolled out into the real world. Comcast requires the manufacturers to submit their modems for testing to verify that they work properly with the new modulation, and don't cause problems for the user, for Comcast, or other users on the same node. Just because something may work in the lab, doesn't mean it will work properly in the real world with real equipment.
If you really need the higher upload speeds, rent a Comcast gateway for awhile. Once more modems are approved, or even the one you current have, you can switch to that. You can always put it in bridge mode if you want to use your own router.
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