Panasonic KX-FP343HK Operating Instructions Manual page 49

Code #80: Resetting advanced features to
their default settings
SET DEFAULT
RESET=NO [±]
To reset the advanced features:
1. Press {MENU}.
2. Press {#}, then {8}{0}.
3. Press {A} or {B} repeatedly to select "YES".
4. Press {SET}.
5. Press {SET} again.
6. Press {MENU}.
L ECM selection (feature #68, page 46) will
not be reset.
8. Programmable Features
47