Aastra Telecom 55i IP Phone - Manual (Page 81)

Model 55i IP Phone User Guide 75
Softkeys and Programmable Keys
2. For softkeys, select from "Key 1" through "Key 20".
or
For programmable keys, select from "Key 1" through "Key 6".
3. In the "Type" field, select Empty.
4. 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.
5. Click to save your changes.
6. Click on Operation->Reset.
7. In the "Restart Phone" field click to restart the IP phone.