4200 series audio rescue assistance system is a time proven rescue assistance system that has received wide industry acceptance. The 4200 includes voice communication, which is initiated by simply depressing the call station button transmitting the signal to a central annunciator panel and optional access to a public telephone line. A single pulse tone and a flashing light signals the caller that the alarm has been received. The control station can then talk to the caller. The caller need not take any other action to communicate with the control station, an important feature when a caller is under stress in an emergency situation. New self cleaning ceramic polymer coating preserves and protects the annunciator surface finish. Now available in standard sizes to 44 zones. Call factory for larger applications. The control station operator, on receiving a call station signal, activates a zone switch that illuminates both a flashing red LED and a green voice LED. By depressing and releasing the talk button, voice communication is established for as long as required. Upon completion the appropriate zone button is depressed again, however, the flashing red light continues. If more than one zone is signaling, the control station accepts the calls in the same manner. When the emergency is resolved, the control station operator pushes a reset switch that restores the entire system to stand-by status. In event of a wiring fault, each annunciator zone is equipped with a yellow LED that will illuminate and an alarm will sound identifying the area requiring service. Cornell now offers as standard, vandal-resistant area of refuge call stations. This design offers heavy duty switches and speakers along with heavy guage stainless steel plates and phillips screws. Tamper proof screws are available for purchase along with the tool to install them if required. Cornell offers a complete line of rescue assistance signage. This includes powered signs including battery back-up and our Radiancetm photo luminescent room identification signs as well as direction and location signs. These signs meet ADA specifications for use with areas of rescue assistance.