Panasonic KX-T336 System Reference Manual page 1072

2.00 Office Code Tables
Summary
Assigns the office codes which are restricted and
which are allowed to proceed to the 7/10 digit
restriction check.
64 screens are provided for Office Code Table
Assigning Items
Hundred Office Code
Description of Assigning Items
Hundred Office Code
( for U.S.A. and Canada only)
Default
blank blank
00 to 99: allowable number for outgoing calls
Assigns office codes to be admitted for 6 Digits Toll Restriction.
blank :Call denied based on office code dialed.
9-I-4
(60395)
numbers from 01 to 64, each of which consists of
four screens.
(Password level : Two or higher)
Selection of Value
: restricts
Reference
3-C-1.06