Polycom SoundStructure C16 Design Manual page 244

Defined Key Presses and Default Key Mapping
As an example, consider the event for the adjusting the volume of the system. In this example, the trigger
equals 59 which is the value of the volume up key on the remote. When key 59 is pressed, the fader for the
amplifier is incremented by 1dB.
Polycom, Inc. 244