AASTRA 4420 IP Basic (SIP) for MX-ONE User Guide - Manual (Page 58)

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Dialog 4420 IP Basic 58
Settings - Programmable keys
Settings Click.
The sub-menus are shown.
Programmable Keys Click.
A table with the current programming for each key is shown. The
key order corresponds to the programmable keys on the
telephone, i.e. the Line/Hold key is located in the left lower corner.
Note: Text that is not underlined, is a designation for a fixed
key and cannot be changed.
To program a key that has not been programmed:
_ Click for the key to be programmed.
12345 Enter the number or code (example).
Click to save.
The key table is shown with the new number or code.
Save