Aastra 6757i CT User Manual page 79

6. (Bottom Softkeys) In the state fields, check (enable) or uncheck (disable) the states you want
to apply to this softkey.
Expansion Module Keys
7. Select from "Key 1" through "Key 36" (M670i)
or
Select from "Key 1" through "Key 60" (M675i)
8. In the "Type" field, select Line to apply to the key.
9. (M675i) In the "Label" field, enter a label to apply to this key.
10. In the "Line" field, select a line to apply to this key.
Valid values are 5 through 9.
11. Click Save Settings.
72 Model 6757i CT IP Phone User Guide