In the US, Verizon offers (sometimes includes for free) a battery backup unit for their ONT for FiOS service, in the name of providing only the phone services d

In the US, Verizon offers (sometimes includes for free) a battery backup unit for their ONT for FiOS service, in the name of providing only the phone services during a power outage. In general there’s nothing stopping any customer from using an off the shelf UPS.