(1) USB port for COMfortel D-XT20/D-XT20i key extension module, USB Headset, USB storage medium for firmware update (only COMfortel D-210)

(2) COMfortel PoE-100 (10/100 Mbit/s) or COMfortel PoE-1000 (10/100/1000 Mbit/s) if there is no PoE supply

(3) Direct PC connection via network cable

* Not included in the scope of delivery