The SF101C Audible-Visual Room Station incorporates push-button operation of call and cancel functions. A call is registered at the annunciator panel and on a corridor light or corridor zone light (if installed) when the call switch with integral call-placed LED is pushed. The call-placed LED will also illuminate. Calls are canceled by simply depressing the cancel button. The call-placed LED will also be extinguished All station components are mounted on a rugged UL® 94V-0 plastic faceplate.