Using and IFB as a priority speak?
The IFB can be used as a priority speak, where a panel or panels can override a set of panels speaking to a destination on the system. The destination can be a panel, 4 wire, FXO, MADI or virtual port. This override feature does not have to be a ‘true’ IFB, and will still function if a IFB source has not been assigned.
In the example below, the Prod1 panel has been set to a higher priority, if the panel keys the IFB1 destination any panel on the Interrupts list speaking to the IFB1 will be cut.