- Backlit display (2 lines with 16 characters per line)

- 3 programmable keys (2 color LEDs)

- 10 fixed functionality keys (redial, conference, transfer, drop, hold, mute, speaker, volume controls and options menu)

- Speaker and Hands Free with high quality audio

- Paper labels

- Notification LED (voicemail)

- Desk or wall mount

- Supports IP H.323; codecs G.711, G.729A/B, e G.726

- LAN Switch 10/100 (only in the 1603SW version), Quality of Service 802.1p/Q and DiffServ

- Supports PoE 802.3af (Class 1) through an external adapter or a DC 5V power adapter