Aastra Telecom 57i IP Phone - Manual (Page 62)

54 Model 57i IP Phone User Guide
Softkeys
5. In the "Line" field, select the line you want to apply to this softkey.
Valid values are 1 through 9.
6. If configuring a softkey on the Bottom Keys, in the state fields, check
(enable) or uncheck (disable) the states you want to apply to this softkey.
7. Click to save your changes.
8. Click on Operation->Reset.
9. In the "Restart Phone" field click to restart the IP phone.