The IP Office system does not supply power to the phones. Each phone requires its own power supply.
Depending on the particular phone model, it can use either Power over Ethernet (PoE) or a separate non-PoE power supply unit.
On phones that support PoE, that support may vary depending on whether the phone has any button modules attached. Adding buttons modules may change the level of PoE power required or may require the phone to use a separate non-PoE power supply unit.
Use of a separate power supply unit requires each phone to have access to a mains power outlet.
