The FIM-VC is a T-branch field-isolator-module with integrated volume control for the T-branch speaker load. A pilot-tone send over the speaker line will force the FIM-VC into ‘override’ mode forcing the attached volumecontrole to switch to MAX. audio level.
 
Any local music source connected to the FIM-VC through the AUX input will mute.
 
The FIM-VC comes with a 11-step wall-controller. -9 / MAX / AUX.
 
The FIM-VC volume controller is equipped with an AUX entry for a local audio source that overrides by paging and emergencies.