Cable glitches out constantly the last week

For over a week now our cox cable on all 3 of our T.Vs have been skipping every 10 minutes or so.. It just pauses and looses all sound, conveniently always during an important scene of my show causing me to miss what was said.. We all have the typical cox boxes they made us switch over to some years back... 

Cable is so freaking expensive so I need to figure out wtf is wrong and how to fix it other than replacing all 3 boxes like the customer service phone person suggested.