our all deco m4 routers have UPS power, but still after the power outage my 3rd Deco showed a red light for some seconds(meaning no internet), and at that time that cover area's internet was gone for 3-4 minutes. if anyone knows a permanent solution reply..
all deco reset done, all deco connected through cat6 cable. we set a wan IP in the main deco, and did everything but still facing the same problem.