Panasonic KX-TD500 System Reference Manual page 1243

57.02 TIE Account Code (TAC)
Description
Tie account codes registered by TAC command is used to prevent the tie callers from making
unauthorized CO calls by checking the validity of the account code entered.
Tie callers must enter a TIE Account Code to make a CO call via tie lines, if "TIE Forced Account Code
Mode" is set to "Yes". Refer to Section 3-F-14.02 "Calling form Tie to CO" for further information.
(Password Level : Two or higher )
Input Format
↵
T A C CR
Item Number (01-32)
Mode (SH/AT/BT)
Item Number Input Values
Item Number Assigning Items Input Value
01 to 32
Tie Account Code Four digits numeric number (0 ~ 9)
11-C-117