Connectivity type: ip/ voip
protocol support: sip
12 sip lines, lines 12 keys, 3 soft keys
44 programmable soft keys with blf
large color lcd display of 4.4 inches, 480 x 272 pixel
hd audio in the handset and speakerphone
support 5-way conference
dual gigabit ethernet switch with poe
bluetooth
audio codecs: g.711μ/a, g.722, g.726, g.729a/b
voice quality: wideband
support for exp220ext
support plantronics ehs
two possible angles of tilt wall mount