3a5f41b7_r_the_Deaf_and_Hard_of_Hearing__Description
[Technology] Alerting Systems [Providers] Central Alert CA 360 Notification Safe Awake Homeland Security FEMA The National Weather Service [Description] 
These systems can alert people who are deaf or hard of hearing by using lights, high-frequency sounds and vibrating notifications that work by way of traditional alarms. Alerting systems can be used for alarm clocks, doorbells, door knocks, phone calls, baby monitors, weather alerts, motion detectors, smoke alarms, and a wide range of other traditional alerting technologies.
NC DHHS: Telecommunications Access for the Deaf and Hard of Hearing
Description