Panasonic KX-FPG381 Operating Instructions Manual page 80

9. Option
Example: Extension number 2
Note:
L To stop registration, press {OFF} on the
handset and press {MUTE} on the base unit.
L If you have not canceled the handset
registration at the previous base unit (page
77), the handset number still remains on that
base unit memory. To erase the handset
number from the previous base unit, see the
base unit operating instructions. For this
base unit:
1. Press {MENU}.
2. Press {MUTE}.
3. Press {SET}.
4. Enter {3}{3}{5}.
5. Press {SET}.
6. Enter that handset number ({1} to {8}).
7. Press {SET}.
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