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Update
Tap "Maintain"---->" Update", enter the update interface
.
Update Interface
Configuration
Meaning
System update
For ACS certification, authentication is successful
you can check the system updates
Audio
Touch "Settings" ----> "Audio", enter the detailed view.
Audio
Touch "Audio"----> "Audio" interface. After configuring the parameters, you
can click "Save" button to save successfully.
Multi-media Video Phone UTT-990 User Manual