Panasonic KX-TD500 System Reference Manual page 702

6. Pressing the F7 key (memory) stores entered
data.
7. Repeat steps 2 to 6 to store or change other
extensions if necessary.
8. After storing or changing, press the F8 key
(function select).
• Function Type 5 appears on the screen.
9. Press the F7 key (PGM mode exit).
• Exiting BLF PGM mode, changes to BLF
Monitor mode.
Type 5
Type 5
Type 4
6-C-14
(7)
Memory
F7
(8)
Function
Select
F8
(7)
PGM Mode
Exit
F7