Backlit display 2.6” diagonal, 2 rows by 16 characters
Key buttons 3 line appearance/feature key buttons – with dual LED’s (red, green)
Speakerphone 2 ways
Line interface Single Ethernet (10/100) line interface Secondary Ethernet (10/100) line interface on the 1603SW
PoE Optional IEEE PoE 802.3af adapter registers as class 1 device
Protocol support H.323
Standards-based codec support G.711, G.726, G.729A/B