Yealink SIP-T48G Administrator's Manual page 725

Advanced menu options are strictly used by administrators. Users can configure them
only if they have administrator privileges. The administrator password can only be
changed by an administrator. The default administrator password is "admin". For
security reasons, the administrator should change the default administrator password
as soon as possible.
Procedure
Administrator password can be changed using the configuration files or locally.
Configuration File
Local
Details of the Configuration Parameter:
Parameter
security.user_password
Description:
Configures the password of the administrator for phone's web user interface access.
The IP phone uses "admin" as the default administrator password.
Example:
security.user_password = admin:123 means setting the password of administrator
(current user name is "admin") to password 123.
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.
Web User Interface:
Security->Password
Phone User Interface:
<y0000000000xx>.cfg
Web User Interface
Phone User Interface
String within 32 characters
Configuring Security Features
Change the administrator
password.
Parameter:
security.user_password
Change the administrator
password.
Navigate to:
http://<phoneIPAddress>/servlet
?p=security&q=load
Change the administrator
password.
Permitted Values Default
admin
705