Mitel / Aastra M685 Expansion Module (50006820, 80C00007AAA-A)
The M685i Expansion Module will add a great addition to Aastra phones. This module will provide users with outstanding flexibility and expandability.
Features
- 28 programmable softkeys with LED
- 4.3″ 480×270 pixel color backlit LCD display
- Option to daisy chain with M680i for a combined total of up to 3 modules
- Powered by the phone; no separate power adapter required