The PS711 provides up to 3 separate ring intercom rings (or circuits) and can support up to 16 beltpacks simultaneously.
The 3 front panel switches can be used to re configure the 3 front panel XLR outputs to function as: 3 independent circuits each with one XLR output, 2 circuits - 1 with 2 XLR outputs and 1 with 1 XLR output, or 1 circuit with three XLR outputs.