Does the IAD have standby power back-up?
No, the IAD does not have standby power back-up. It would not work in the event of a power failure, and you cannot make any outgoing calls or receive incoming calls. For users who are concerned about power-related disruptions, we would like to suggest that they consider installing a back-up power option such as an Uninterruptible Power Supply (UPS) unit. The benefit of having an UPS is that it would provide back-up power in the event of a power failure, not just for the IAD, but also for their PC and other equipment in the house.