Yealink SIP-T4X Administration Manual page 384

Default Value
Range
Example
Parameter-
account.X.srtp_encryption
Description
Format
Default Value
Value
Example
Parameter-
auto_provision.aes_key_in_file
Description
Blank
String within 511 characters
server_certificates.url =
http://192.168.1.20/ca.pem
Configuration File
<MAC>.cfg
Configures whether to use voice encryption
service.
If it is set to 1 (Optional), the phone will
negotiate with the other phone what type
of encryption to utilize for the session.
If it is set to 2 (Compulsory), the phone is
forced to use SRTP during a call.
X ranges from 1 to 6.
Integer
0
Valid values are:
0-Disabled
1-Optional
2-Compulsory
account.1.srtp_encryption = 1
Configuration File
<y0000000000xx>.cfg
Enables or disables the IP phone to decrypt
configuration files using the encrypted AES
keys.
If it is set to 1 (Enabled), the IP phone will
download <y0000000000xx_Security>.enc
and <MAC_Security>.enc files during auto
provisioning, and then decrypts these files
into the plaintext keys (e.g., key2, key3)
Appendix
369