Yes, for at least a limited duration, depending on the building in which the phone is located. Most campus buildings are attached to an emergency backup generator. If the power goes out, the generator starts up and will provide power for as long as needed. However, there are nine campus buildings that were not able to attach to the emergency generator grid: 3rd Avenue Grounds, Campus Center for Equity & Diversity, Ceramics, ERIC, MEC, Oviatt, Pollock, Radford, and Titan Stadium. The network closets in these nine buildings are equipped with small battery backup systems. While this battery backup is not enough power to maintain operation of your computer, it is enough to maintain operation of your VoIP phone. We expect the battery backup power will last approximately 30 minutes, but it depends on the load it is experiencing.