The Feature Codes menu shows all feature codes, speed dials, and ring groups that are currently built into Kerauno. The feature codes under the System Reserved menu include the dial codes required to access voicemail, log in and out of ring groups, configure a phone, etc.
The second section of this menu, Application Speed Dials, contains all extension shortcuts for speed dials and ring groups built into Kerauno. For example, if in the Call Routing menu a speed dial 8000 and ring group 5002 were created, both would be labeled and displayed under the Application Speed Dials menu.