Yealink SIP T2 Series Provisioning Manual page 129

Parameter
security.user_name.admin
security.user_password
trusted_certificates.url
Permitted
Values
It configures the user name of the administrator for
String within
phone's web user interface access.
32 characters
The default value is admin.
It configures the password of the user and
administrator for phone's web user interface
access.
The valid value format is username:new password.
Example:
String within
security.user_password = user:123 means setting
32 characters
the password of user (current user name is "user")
to password 123.
The default value is blank.
Note: IP phones support ASCII characters
32-126(0x20-0x7E) in passwords. You can set the
password to be empty via web user interface only.
It configures the access URL of the custom trusted
certificate used to authenticate the connecting
server.
URL within 511
Example:
characters
trusted_certificates.url = http://192.168.1.20/tc.crt
The default value is blank.
Descriptions
Security->Password
Security->Trusted Certificates->Load
trusted certificates file
Appendix
Web Setting Path
123