Corridor audible isolator module for two suites. To be used with up to 2 CSM-1A modules and with 25 and 70 volt speakers only. No 24vdc applications. Includes NO yellow LED's to indicate short condition of the individual suites. To be used only with XP6-CA and FCM-1A control modules. To be used only with ONYX panels. For use with AA-100/120, DAX-3525, DAX-5025, DAA2-5025 & DAA2-7525 amplifiers only. Do Not Use on 70V DAA Series Amplifiers