Yealink T26

T26’s advanced settings
Account
Press Menu->Enter->Advanced settings, and then input the password to enter
the interface, the default password is 123. You can set it through the web page.
Then choose Account then press Enter, you can do some sip settings.
Network
Press Menu->Enter->Advanced settings, and then input the password to enter
the interface. Then choose Network and press Enter, you can do network
settings, you can refer to 2.2.1 Network settings.
Security
Press Menu->Setting->Advanced settings, and then input the password to enter
the interface. Then choose Security, you can configure Menu Password,
Keylock Password and Keylock Status.
Maintenance
Press Menu->Enter->Advanced settings, and then input the password to enter
the interface. Then choose Maintenance and press Enter, you can configure
Auto Provision, Backup, and Upgrade.
Factory Reset
Press Menu->Enter->Advanced settings, and then input the password to enter
the interface. Then choose Factory Reset and press Enter, you can choose Yes
or No.