Cox Increases Fiber-Powered Internet Speeds for Most Customers

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It is DOCSIS 3.1 and rated for upto 1Gbps according to COX. I haven't seen any improvement on Upload speed, still at 10Mbps.

The two possibilities I can think of is either the upgrade isn't live in your area or there is heavy congestion. Do you live in a heavily populated area like a apartment? Do you see two downstream OFDM channels? To check your signal levels go to 192.168.0.1 in a browser > username:admin password:password > Connection > Cox Network. Under your downstream channels there should be 2 separate OFDM channels.

I have a similar problem. My new service is listed as "Go Faster Internet" with a speed of 250 Mbps. Previously it was named  "Internet Essential Classic" with a speed of 150 Mbps. I am getting the exact same speed as before-no change. Since the new speeds went into effect about a week ago I would imagine that Cox has not completed provisioning everyone to their new speed. Perhaps a Moderator would have more information on the topic.

That's a possibility. I wish the gateways showed the configuration file from Cox. That would show the provisioned speed. I tried asking a moderator here but they didn't seem to have any information.

Yes, I went from the "Cox Internet Preferred" to the "Go Even Faster Internet". Unfortunately when I asked Cox support about my issue, their only recommendation (Outside of the typical restart your modem) was to replace my cox supplied modem or to send out a technician. I thought this would be a waste of time (Due to my speed tests being so stable and consistent at 299.8Mbps over numerous tests which lead me to believe this was throttling on the ISP's side). I figured this would be corrected by my next data usage cycle which refreshes on July 18th. I guessed they would have some automatic provisioning system that triggers with billing/data cycles, so that they don't overload their system and just upgrade 75% of the city on the same day.

Are you testing over Ethernet? Testing on WiFi is inaccurate!

Good to know! How do I test over Ethernet? My laptop doesn’t have an Ethernet port. 

Does it have USB 3.0 or above? USB-C? If so, get a USB>ethernet adapter. You will never get full speed over Wi-Fi. Just the nature of the beast.

Please take this conversation to it's own post. This does not belong in this forum thread as it is a completely different issue that is not related.

I think the speed increase was mostly for cable(HFC) customers. If your getting 250Mbps up, you must be fiber. Did you get notification of your speeds changing?

Yes, I received an email from Cox a few days ago. We are on fiber.

Have you tested direct to the ONT? If so, I would email Cox at cox.help@cox.com and see if your circuit is rated for 500Mbps. Not sure how it works with fiber but maybe something on the backend has to be refreshed with the change.