Yealink SIP-T46G Administrator's Manual page 213

To configure the SRTP feature via web user interface:
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The IP phone can download the encrypted configuration files from the provisioning
server to protect against unauthorized access and tampering of sensitive information
(i.e., login passwords, registration information). Configuration files can be encrypted
using a command line tool. The encryption algorithm is AES 128. From a Microsoft
Windows command line, you can use the Yealink-supplied encryption tool called
"EncryptUtilityWindows.exe" to encrypt the <y000000000028>.cfg and <MAC>.cfg files
respectively.
Note
Yealink also supplies an encryption tool (EncryptUtilityLinux.exe) to support Linux
platforms if required.
You can also encrypt the configuration files using the Yealink Configuration Conversion
Tool. For more information, refer to
The filename extension of the encrypted configuration files must be .cfg. The Common
AES key is used to encrypt and decrypt the <y000000000028>.cfg file and the
VoIPon www.voipon.co.uk sales@voipon.co.uk Tel: +44 (0)1245 808195 Fax: +44 (0)1245 808299
Click on Account.
Select the desired account from the pull-down list of Account.
Click on Advanced.
Select the desired value from the pull-down list of RTP Encryption (SRTP).
Click Confirm to accept the change.
Yealink Configuration Conversion Tool User Guide
Configuring Security Features
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201