Mitel (formerly Shoretel) IP Phone 480 Features 297 x 160 pixel, backlit display 8 line appearances Integrated headset jack with LED button Full-duplex Speakerphone Visual Voicemail Expanded Call History Built-in 10/100 Ethernet switch Fixed feature keys include transfer, conference, hold, call history, voicemail, and directory SIP protocol G. 711, G. 722, G. 723, G. 726, G. 729a, iLBC, Linear16 codecs Powered via 802.3 af Power over Etherenet or PoE Injector (sold separately)