Maximum system (line) appearances |
1 |
4 |
4 |
18 |
12 |
50 |
4 |
4 |
Programmable buttons w/ lights |
NO |
4 |
4 |
18 |
8 |
50/100 WITH SHIFT BUTTON |
4 |
4 |
Power over Ethernet support (802.3af) |
YES |
YES |
YES |
YES |
YES |
YES |
NO |
NO |
Codecs G.711, ADPCM, G729 A/B |
YES |
YES |
YES |
YES |
YES |
NO |
YES |
YES |
G.722 codec-ready handset |
YES |
YES |
YES |
YES |
YES |
NO |
NO |
NO |
G.722 codec-ready speakerphone |
NO |
NO |
NO |
YES |
YES |
NO |
NO |
NO |
Removable faceplate for localization |
NO |
NO |
NO |
YES |
YES |
NO |
NO |
NO |
Browser-based administration |
YES |
YES |
YES |
YES |
YES |
YES |
YES |
YES |
Required Software Revision |
5.0 |
4.3 |
4.3 |
4.2 |
5.0 |
4.3 |
5.0 |
5.0 |