I was having similar problems. Do you have a DOCSIS 2.0 modem? If so, upgrade to a 3.0 modem or gateway. 2.0 is not supported by Cox in New Orleans. I just got the Cisco DPC3825 gateway (the only one offered) and it works fine. The set up instructions were WAY more complicated than they had to be, tho. Simply add your devices MAC addresses, then use the password to connect each device. My download speeds have increased dramatically and I've had no drops. Good luck!
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