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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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  • Yeah, I received an email from cox hyping the need to cough up $80.00 for equipment that results in no real improvement in speed! Had I known, I would have just taken my wife out for a nice dinner with that $80.00.

    I measured my speed on AT&T web site (just google att speed test) before and after the "upgrade". There was virtually no difference. I measure both wired and wireless.

    My humble advice is, just keep the old equipment until Cox can GUARANTEE a drastic improvement in speed. The equipment itself is capable of over 300Mbps. But of course Cox does not provide anywhere NEAR that.

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