Yealink SIP-T48G - Manual (Page 40)

User Guide for the SIP-T48G IP Phone
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5. Tap the desired time format (12 Hour or 24 Hour) from the pull-down list.
6. Tap the Save soft key to accept the change or to cancel.
Time and date are configurable via web user interface at the path Settings->Time &
Date.
The Advanced option is only accessible to the administrator. The default administrator
password is “admin”. For security reasons, you should change the default administrator
password as soon as possible.
To change the administrator password via phone user interface:
1. Tap ->Advanced (password: admin) ->Set Password.
2. Enter the old password in the Current Password field.
3. Enter the new password in the New Password field.
4. Enter the new password again in the Confirm Password field.
5. Tap the Save soft key to accept the change or to cancel.
Administrator password is configurable via web user interface at the path
Security->Password.