Yealink T46G Administrator's Manual page 337

Parameters
auto_provision.aes_key_16.mac
Description:
Configures the plaintext AES key for decrypting the MAC-Oriented CFG file.
The valid characters contain: 0 ~ 9, A ~ Z, a ~ z and the following special characters are also
supported: # $ % * + , - . : = ? @ [ ] ^ _ { } ~.
Example:
auto_provision.aes_key_16.mac = 0123456789abmins
Web User Interface:
Settings->Auto Provision->MAC-Oriented AES Key
Phone User Interface:
Menu-> Advanced ->Set AES Key->MAC-Oriented
To configure AES keys via web user interface:
Click on Settings->Auto Provision.
1.
Enter the values in the Common AES Key and MAC-Oriented AES Key fields.
2.
AES keys must be 16 characters and the supported characters contain: 0-9, A-Z, a-z and the
following special characters are also supported: # $ % * + , - . : = ? @ [ ] ^ _ { } ~.
Click Confirm to accept the change.
3.
Configuring Security Features
Permitted Values
16 characters
Default
Blank
323