Aastra 6755i User Manual page 78

Programmable Keys
7. Select from "Key 1" through "Key 6"
8. In the "Line" field, select a line to apply to this key.
Valid values are 5 through 9.
Expansion Module Keys
9. Select from "Key 1" through "Key 36" (M670i)
or
Select from "Key 1" through "Key 60" (M675i)
10. In the "Line" field, select a line to apply to this key.
Valid values are 5 through 9.
11. (M675i) In the "Label" field, enter a label to apply to this key.
12. Click
70
to save your changes.
Model 6755i IP Phone User Guide