Yealink T40G

Yealink T4 Series IP Phones User Guide
8
Connecting the Expansion Module
120
Assigning the Features for Ext Keys
120
Adjusting the Contrast of the Expansion Module
121
Adjusting the Backlight of the Expansion Module
121
Maintaining Your Phone
122
Warnings
122
Investigating Warnings
122
Re-provisioning Your Phone
122
Clearing Warnings
123
Diagnosing the Network
123
Rebooting Your Phone
123
Resetting to Factory Settings
124
Updating the Phone Configuration
124
Clearing User's Personalized Configuration Settings
125
Appendix - Menu Structure
126
For the T48S/T48G Phone
126
For the T46S/T46G Phone
127
For the T42S/T42G/T41S/T41P/T40P/T40G Phone
128