Panasonic KX-TD500 System Reference Manual page 1282

Operation chart for setting the PITS system programming mode
Note:
To end the PITS system programming mode and return to the PITS
station programming mode, press the END button while "Initial
display for PITS system programming mode" is displayed.
In the PITS system programming mode, you can return to "Initial
display for PITS system programming mode" (status 1) by pressing
the END button.
Operation mode
May 18 12:00 AM
Present time is displayed.
PITS station programming mode
PITS-PGM No?
Initial display for PITS station programming
mode
ENTER PASSWORD
The PITS programming password entry
screen appears on the display.
PITS system programming
mode
SYS-PGM No?
Initial display for PITS system
programming mode
Dial a program number and
perform PITS system
programming.
12-C-4
Press the PROGRAM (or PAUSE) button
to enter PITS station programming mode.
R
Dial " #" to set the PITS system
programming mode.
Dial the four digit password.
To return to "Initial display for PITS
system programming mode", press the
END button.
Operation
Result from the
operation