The NC-110-16 Audible-Visual Nurse Call System provides audible and visual call indication without the use of intercom communications. The basic system consists of a master annunciator/control panel, room call stations, emergency call stations, dome lights, zone lights, control unit, and power supply equipment. Emergency signals are identified at the master station by a rapid flashing of the associated station indicator light, call light, and emergency light in addition to a rapid pulsating tone. Routine calls are indicated by the steady illumination of the station selector light, call light, and a slow pulsating tone. The tone may be canceled for normal calls by depressing the tone-off button. Emergency calls take precedence over Routine calls. Call signals can be canceled at point of origin only. Tone-Off and Tone-Test functions are push button selected from the control panel. Indicator lights signal the presence of Emergency or Routine calls.