These simple analog telephones, like the ones you probably have at home that plug directly into the wall and have only one or two telephone numbers connected to them, should continue to work during a power outage. Your analog telephone may also have special features such as programmable dialing and numeric displays, or a built-in answering machine. Generally, there are batteries to retain programmed numbers. However, if instead there is a power adapter which plugs into an electrical outlet, the telephone might not work in an outage. You might consider connecting the power adapter to a UPS, if you have one for your computer.
Some people use limited-range cordless handsets or headsets on campus.
These devices generally depend upon a power adapter being connected to an AC outlet, and will not work during a power outage. You might consider connecting the power adapter to a UPS, if you have one for your computer. These are usually the old brown telephones with thick cables, and buttons that light up. While the telephones should continue to place and receive calls during a power outage, the lights on the buttons will not work , and the telephones won't ring . These telephones will continue to work during a power outage.