Panasonic KX-TD500 System Reference Manual page 790

3.00 Secret Dialing
Description
During speed dialing or calling by Extension
Directory, all or part of the telephone numbers that
appear on the CRT screen can be concealed. The
secret portion appears with "
The dialing numbers are registered by "System-
Speed Dial-System". When storing a number,
bracket the secret part that you want to hide with
[ ]. Then the part does not appear on the CRT
screen.
It is assignable to print out the secret part onto
SMDR (Station Message Detail Recording) by
assigning "System-Operation", Print Secret Dial to
Yes.
Programming
System Programming
"System-Operation",
Print Secret Dial
"System-Speed Dialing-System"
".
Reference
VT Dumb
10-D-1.00 11-C-4.00
10-D-8.00 11-C-13.00
6-J-8
Conditions
When storing a speed dialing code, entering "["
only without entering "]", causes all the digits
entered after "[" to be hidden.
Operation
None