Visitor
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My upload is provisioned at about 5 Mbps
I have my own modem, a Netgear CM600. My upload is provisioned at about 5 Mbps, but my plan supports substantially more — I measured 170 Mbps upload on the Comcast gateway on this same line recently. I'd like someone to check the service configuration file being served to my modem's MAC address and tell me what upstream rate it specifies.
I've already power-cycled the modem and reviewed the signal page. Downstream is 24 channels locked at QAM256, SNR 37 to 43 dB, with zero correctables and zero uncorrectables. Upstream is four ATDMA channels at 44 to 46 dBmV. The physical layer is clean. This is a provisioning question, not a signal question.
Accepted Solution
EG
Expert
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119.6K Messages
2 days ago
That modem is no longer supported by them. That doesn't mean that it won't work for now, but it will no longer receive any security, speed, or firmware updates. One day (perhaps soon) they will "End Of Life" it and it no longer will function on their system at all. You really should consider upgrading it to one that is currently compatible. Also, modems that are no longer supported may act erratically and not produce the proper speeds. They will default down to using an even slower legacy speed configuration file for the download and the upload speeds.
Here is where to find compatible devices for your subscribed to speed tier;
https://www.xfinity.com/support/internet/customerowned#auth
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XfinityMelinda
Official Employee
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277 Messages
10 hours ago
Hello @user_zal7, thank you for reaching out on our Community Forum! I see that one of our amazing Xfinity Experts, @EG, previously shared information regarding compatible customer-owned modems and our supported device list. Were you able to review that information, and did it help answer your question?
If you still need assistance or have additional questions, please let us know, and we'll be happy to help further.
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