Yealink SIP-T48G Administrator's Manual page 238

Microsoft Lync Edition Administrator's Guide for SIP-T2_Series and T4_Series IP Phones
Procedure
AES keys can be configured using the configuration files.
Configuration File
Local
Details of Configuration Parameters:
auto_provision.aes_key_16.com
Description:
Configures the plaintext AES key for decrypting the Common CFG file.
The valid characters contain: 0 ~ 9, A ~ Z, a ~ z.
Example:
auto_provision.aes_key_16.com = 0123456789abcdef
Web User Interface:
Settings->Auto Provision->Common AES Key
Phone User Interface:
Menu->Settings->Advanced Settings->Set AES Key->Common
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.
Example:
auto_provision.aes_key_16.mac = 0123456789abmins
Web User Interface:
Settings->Auto Provision->MAC-Oriented AES Key
226
<y0000000000xx>.cfg
Web User Interface
Phone User Interface
Parameters
Configure AES keys.
Parameters:
auto_provision.aes_key_16.com
auto_provision.aes_key_16.mac
Configure AES keys.
Navigate to:
http://<phoneIPAddress>/servlet?p
=settings-autop&q=load
Configure AES keys.
Permitted Values
16 characters
16 characters
Default
Blank
Blank