Panasonic KX-T336 System Reference Manual page 1257

63.00 Equal Access Code (EQC)
Description
Either "10XXX" or "101XXXX" can be selected as Equal Access Code.
(Password Level : Two or higher)
Refer to Section 10-H-1.00 "Equal Access" for further information.
Input Format
Mode
E Q C
Index Number
None
Input Value
1: 10XXX (default)
2: 101XXXX
(
CR
10-C-108
(60395)
for U.S.A. and Canada only)