Aastra M670i Phone Expansion Module

Features: Up to 9 call appearance lines over the phone and expansion modules. Shared Call and Bridged Line Appearances. Busy Lamp Field. Programmable Speed dials. Custom XML feature key support. 36 Keys with LED's. Call park and pickup. Directory. Callers log. Do Not Disturb. Flash features. Wall Mountable. Connect up to 3 expansion modules per supported phone model.Foot stand.

compatible: Aastra 6755i, Aastra 6757i, and Aastra 6757i CT.