Comparison
LCD
- 
			 						
2.8”, color
 - 
			 						
2.8”, B&W
 - 
			 						
2.8”, B&W
 - 
			 						
2.3”, B&W
 - 
			 						
2.3”, B&W
 
Resolution
- 
			 						
320 x 240
 - 
			 						
132 x 64
 - 
			 						
132 x 64
 - 
			 						
128 x 64
 - 
			 						
128 x 64
 
USB port
- 
			 						
Yes
 - 
			 						
No
 - 
			 						
No
 - 
			 						
No
 - 
			 						
No
 
PoE
- 
			 						
Class 2
 - 
			 						
Class 1
 - 
			 						
Class 1
 - 
			 						
Class 1
 - 
			 						
No
 
Ethernet port
- 
			 						
2 x 10/100/1000M
 - 
			 						
2 x 10/100/1000M
 - 
			 						
2 x 10/100/1000M
 - 
			 						
2 x 10/100M
 - 
			 						
2 x 10/100M
 
Handset port
- 
			 						
RJ9
 - 
			 						
RJ9
 - 
			 						
RJ9
 - 
			 						
RJ9
 - 
			 						
RJ9
 
Wi-Fi
- 
			 						
Yes
 - 
			 						
No
 - 
			 						
No
 - 
			 						
No
 - 
			 						
No
 
Line keys
- 
			 						
4 LED line keys
 - 
			 						
3 LED line keys
 - 
			 						
3 LED line keys
 - 
			 						
2 Line keys
 - 
			 						
2 Line keys
 
Programmable keys
- 
			 						
33
 - 
			 						
29
 - 
			 						
29
 - 
			 						
11
 - 
			 						
11
 
SIP account
- 
			 						
4
 - 
			 						
3
 - 
			 						
3
 - 
			 						
2
 - 
			 						
2
 
Codec
- 
			 						
Opus (NB and WB), G.722,
ILBC, G711 (A-law and u-law), G.729AB - 
			 						
Opus (NB and WB), G.722,
ILBC, G711 (A-law and u-law), G.729AB - 
			 						
Opus (NB and WB), G.722,
ILBC, G711 (A-law and u-law), G.729AB - 
			 						
Opus (NB and WB), G.722,
ILBC, G711 (A-law and u-law), G.729AB - 
			 						
Opus (NB and WB), G.722,
ILBC, G711 (A-law and u-law), G.729AB 
Contacts
- 
			 						
1000
 - 
			 						
1000
 - 
			 						
1000
 - 
			 						
1000
 - 
			 						
1000
 
Local conference
- 
			 						
6-way conference
 - 
			 						
6-way conference
 - 
			 						
6-way conference
 - 
			 						
3-way conference
 - 
			 						
3-way conference
 
Recording
- 
			 						
Yes
 - 
			 						
No
 - 
			 						
No
 - 
			 						
No
 - 
			 						
No
 
Wall mountable
- 
			 						
Yes
 - 
			 						
Yes
 - 
			 						
Yes
 - 
			 						
Yes
 - 
			 						
Yes
 
Foot stand
- 
			 						
2 adjustable angles
 - 
			 						
2 adjustable angles
 - 
			 						
2 adjustable angles
 - 
			 						
2 adjustable angles
 - 
			 						
2 adjustable angles