The Cornell S-111 Staff Station includes an on/off tone switch that can be passed, green LED to indicate normal call, and red LED to indicate emergency call. The S-111 Staff station is also furnished with a pull-string to place a call on the system. Operation: The S-111 Staff Station has a tone on-off switch that is provided to silence the audible alert by staff. Normal calls are indicated with a steady green LED and slow intermittent tone. Emergency calls are indicated with flashing red LED and rapid tone. To place calls on the system, pull cord; the stations red LED, and associated corridor and annunciator panel lights, are illuminated, and a tone sounds at the annunciator panel. To cancel, slide switch to off position. S-112 Staff Station Description: The Cornell S-112 Staff Station includes a green LED to indicate normal call, and red LED to indicate emergency call. It is also furnished with an adjustable volume pot that is preset upon installation. The S-112 Staff station is also furnished with a pull-string to place a call on the system. Operation: The S-112 Staff Station indicates normal calls with steady green LED and slow intermittent tone. Emergency calls are indicated with flashing red LED and rapid tone. To place calls on the system, pull cord; the stations red LED, and associated corridor and annunciator panel lights, are illuminated, and a tone sounds at the annunciator panel. To cancel, slide switch to off position. S-111 and S-112