My Deco was connected to an Altice cable modem from Optimum.  We had tons of problems with flaky internet connectivity.  I really complained to Optimum and got them to come out to my house 3 different times to try to figure out the problem.  They tested all of the equipment from the pole outside to the Altice modem.  We disabled the wireless router on the Altice device and then configured it as a bridge rather than a router.  Nothing worked.  Finally, my husband suggest that we turn off the Deco.  Before removing the Deco, I tried to modify what few settings that I could in the Deco management console but the options available were quite limited.  Disconnecting the Deco really was a last ditch attempt to try to get some sort of usable internet connectivity.  Now, we've been connecting to the internet directly through the Altice cable modem for 2 months without a single drop in connectivity.  I really want to use the Deco but my family will mutiny if we start having flaky internet again. 

Is there a cable modem compatibility list for the Deco X90?  Has anyone experienced this type of problem?  Any ideas for what could be causing the Deco to consistently drop connectivity to the cable modem?  I cannot switch ISPs because, right now, Optimum is literally the only provider in our area.  Thanks!