The SPA525G phone is connected to the network through its Ethernet connection or the built-in Wireless-G connection. If you are using the Wireless-G connection, a separate power adapter (PA-100) is required. The SPA525G provides an additional Ethernet port that allows a computer to be connected to the network through the IP phone. (This option is only available when phone is connected to the network via the wired Ethernet connection).

Unlike traditional phones, the Cisco SPA525G requires a separate power source. Either connect your phone to an Ethernet switch that provides Power over Ethernet (PoE), or use a separate power adapter (PA-100).