Optional features are licensed by Avaya or its third-party vendors. You can view which features can used with either the Web Administration interface or the command-line interface.
Web Administration interface
From web administration, go to the Feature Licensing screen (Configuration Management > Feature Licensing).
The system displays the Feature Licensing screen. For information about this screen, see Feature Licensing screen.
Command-line interface
From the command prompt, type licenseQuery and press Enter.