Frequent internet disconnects lasting ~2 minutes then full connectivity

In the last several weeks I have been experiencing, both at home and at a neighborhood restaurant, frequent drops of internet connectivity lasting about two minutes followed by full connectivity restored.  At the restaurant it is everyday at 4:51 PM and at home the time seems to vary wildly.  This morning it has cycled four times between 6:45 and 7:45.  

This is in Lafayette, Louisiana.

During the last outage I was able to get to the cable modem 192.168.100.1 and obtain the following.  The receive power level is 2.6dBmV after connectivity restored is the only difference i saw.  All of the lights except two on the front of the modem go out.

Since this is happening at two different locations about a mile apart I am guessing this is a Cox system level problem and not a local in my house wiring problem.