Add Time Controlled Alert Tones and Emergency Signals to your Paging System Viking's CTG-1 Clock Controlled Tone Generator will provide accurately timed alert tones over an existing paging system. The CTG-1 can be programmed to output single, double, or triple alert tones or buzzer sounds on up to 128 events in a 24 hour period. The CTG-1also provides three contact inputs for triggering and emergency siren, an evacuation signal, or a doorbell sound. Applications: Signal the beginning and end of class periods, breaks, and lunch periods for schools Signal the beginning and end of shifts, breaks, and lunch periods for factories and other businesses Provides a door bell and /or alarm sounds over an existing paging system, for door entry, fire, severe weather applications Use with Viking's digital announcers, to provide timed messages