New internet keeps dropping

I just changed to cox from DSL the cox is a whole lot faster but it keeps dropping . I get this same error message on my router what can I do? Time Priority Description Tue Jan 21 20:53:11 2014 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=00:8e:f2:34:de:98;CMTS-MAC=a4:4c:11:8b:38:63;CM-QOS=1.1;CM-VER=3.0;