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Only getting max download of 33 Mbps with new DOCSIS 3 Motorola SB6183 16channel modem and Premier upgrade

I had a very old DOCSIS 2 modem until recently when I received my new DOCSIS 3.0 Motorola SB6183 in the mail.

I was on Preferred Internet and would get 20-25 Mbps reliably and actually got 33 Mbps this am before changing out the modem.

I swapped the modems and called support to activate new modem - I had the rep upgrade me to Premier at that time.

I am still capping at 33 Mbps downloads and about 7 Mbps uploads despite the upgrade.

Could someone check to see if anything can be done on the COX end of things to speed up the connection?


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  • I just sent the signal to reset the device. Allow a couple of minutes for it to recycle, then restart any other equipment you have connecting to the device. Run another speed test from our website. It will post the results and we can review them from here.

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