| 
				model | 
			
				ES620 | 
			
				ES410 | 
			
				ES330 | 
			
				ES320 | 
			
				ES292 | 
			ES290 | ES220 | ||
| Telephone picture | 
				![]()  | 
			
				![]()  | 
			
				![]()  | 
			
				![]()  | 
			
				![]()  | 
			
				![]()  | 
			
				![]()  | 
			
				 | 
		|
| 
				Parameter Download | 
			Complete parameters | 
				Complete parameters | 
			
				Complete parameters | 
			
				Complete parameters | 
			
				Complete parameters | 
			
				Complete parameters | 
			
				Complete parameters | 
			
				 | 
		|
| 
				LCD display | 
			480 x 272 colour screen | 
				240 x 160 B&W screen | 
			
				132 x 64 B&W screen | 
			
				132 x 64 B&W screen | 
			
				132 x 64 B&W screen | 
			
				132 x 64 B&W screen | 
			
				132 x 48 B&W screen | 
			
				 | 
		|
| SIP Accounts | 
				8 | 
			
				4 | 
			3 | 2 | 3 | 2 | 2 | 
				 | 
		|
| 
				DSS (programmable keys)  | 
			— / 40 | 
				—  | 
			
				— | 
			
				— | 
			
				— | 
			
				— | 
			
				—  | 
			
				 | 
		|
| 
				Extension module ESM18-LCD/ESM32  | 
			2 | 
				4 | 
			4 | 
				—  | 
			
				—  | 
			
				—  | 
			
				—  | 
			
				 | 
		|
| 
				HD voice Codec / HD handle / HD speaker | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				 | 
		|
| 
				G.711A/U    iLBC | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				 | 
		|
| 
				Voice codec/HD    G.722 | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				 | 
		|
| 
				G.726   G.729A/B | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				 | 
		|
| 
				Adjustable bracket | 
			
				√ | 
			
				√ | 
			
				—  | 
			
				—  | 
			
				—  | 
			
				—  | 
			
				—  | 
			
				 | 
		|
| 
				Auto Procision/TR069 | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				 | 
		|
| Speakerphone Full-duplex | 
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				 | 
		|
| 
				BLF/BLA | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				 | 
		|
| 
				Speed dial | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				 | 
		|
| Hot line | 
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				 | 
		|
| SMS | 
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				 | 
		|
| XML Phonebook | 
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				 | 
		|
| Multi-language | 
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			√ | 
				√ | 
			
				 | 
		|
| 
				VPN | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				 | 
		|
| 
				VLAN/QoS | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				 | 
		|
| Wall Mounted | 
				√  | 
			√ | 
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				—  | 
			
				 | 
		|
| 
				POE | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				√ | 
			
				 | 
		|
| Gigabit Ethernet | 
				√ | 
			
				—  | 
			
				√  | 
			
				√ | 
			
				—  | 
			
				—  | 
			
				—  | 
			
				 | 
		|
| 
				USB Charging | 
			
				√ | 
			
				√ | 
			
				√  | 
			
				√  | 
			
				√  | 
			
				√  | 
			
				√  | 
			
				 | 
		
			
             









