Yealink SIP-T2xP Auto Provisioning Manual page 125

Parameter
security.cn_validation =
security.dev_cert =
phone_setting.reserve_certs_enable =
Permitted Values
It enables or disables the phone to
mandatorily validate the CommonName or
SubjectAltName of the certificate received
from the connecting server.
0 or 1
0-Disabled
1-Enabled
The default value is 0.
It takes effect after a reboot.
It configures the device certificates for the
phone to send for TLS authentication.
0-Default certificates
0 or 1
1-Custom certificates
The default value is 0.
It takes effect after a reboot.
It enables or disables the phone to reserve
custom certificates after it is reset to factory
defaults.
0 or 1
0-Disabled
1-Enabled
The default value is 0.
Descriptions
Security->Trusted
Certificates->Common Name
Validation
Security->Server Certificates->Device
Certificates
Appendix
Web Setting Path
115