Have a look at pgm 227 (Authorization code table).
Authorization code length can be programmed as 5 digits or variable length (3-11digits). If a 5-digit authorization code
usage is programmed, the authorization code works as 5 digits length in admin program or features.
Under the variable length mode, the authorization code is flexible from 3 digits to 11 digits (in MPB version 2.0 or
below, authorization code is fixed as 5 digits)
Authorization code can be programmed as 5 digits or flexible length (3-11 digits); refer to PGM161 – FLEX21
To activate Walking COS from a DKTU, perform the following Steps:
1. Press the [TRANS/PGM] button.
2. Dial 2 3; the confirmation tone should be heard
3. Enter the authorization code; the intercom dial tone should be heard and the used extension COS
(Ref. C) is temporarily changed.
4. A CO line call can be placed only one time.
To program {Walking COS} on a flexible button:
1. Press the [TRANS/PGM] button.
2. Press the applicable FLEX button.
3. Press the [TRANS/PGM] button.
4. Dial 2 3.
5. Press the [HOLD/SAVE] button to accept changes.
This information could be found in the feature description manual, and the programming manual.
Regards Jolle