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- Support for G.722 HD Voice
- Support for G.722 HD Voice
- Support for up to 3 expansion modules
- Press-and-hold speeddial key configuration feature
- Headset mode support
- Built-in-two-port, 10/100/1000 Gigabit Ethernet switch
- Support for G.722 HD Voice
- Support for G.722 HD Voice
- Support for up to 3 expansion modules
- 10 predefined hard keys
- Supports up to 3 M670i modules
- Up to 9 lines with call appearances
- 4 navigational keys
- Live dial pad or pre-dial support
- Distinctive ringing, priority alerting
- 2 context-sensitive softkeys
- Large 5 lines backlit display
- 2.5mm headset connector
- 30 context-sensitive system soft keys
- Up to 24 lines with two dedicated line keys with LED/li>
- Embedded Bluetooth 4.0
- 2.75", 128x48 pixel LCD display
- Wideband HD audio
- Dual Ethernet ports
- Do Not Disturb
- Shared call and bridged line appearances
- 6 programmable keys with LEDs
- Large Touch Screen Display
- Mitel Hi-Q™ Wideband Audio Technology
- Flexible Headset Options
- 2 context-sensitive softkeys
- Large 5 lines backlit display
- 2.5mm headset connector
- 480x272 pixel color backlit LCD display
- Support for up to 24 lines
