GPI Control

General Purpose Interface (GPI) is a high/low voltage signalling protocol that allows the switcher to send simple commands to an external device, or receive commands from a device. Each pin on the GPI is set as either high (+5 Volts), or low (0 Volts), and it is the switching between high and low that sends commands to the external device, or to the switcher.

Note: The Tally and GPI ports are located on the first 1RU Audio Breakout Module (ABM 1). The Tally and GPI ports on the remaining 1RU Audio Breakout Modules are not available for use.