The NR100 converts virtually any paging system into an after-hours night bell alert system. The economical NR100 night ringer sends an electronic tone through paging system speakers when triggered by the telephone system's night bell circuit, thus eliminating the need for loud, old-fashioned night bells thoughout a facility. The NR100 is an easy and efficient way to alert security guards or other personnel of incoming calls during non-business hours.The NR100 is easily connected to the AUX input of a paging amplifier and can be activated by either 90V ring or contact closure.Connections are included for a background music source. The ringer preempts the background music automatically.