Final answer:
A fire alarm receiver is a device essential for public safety that ensures emergency signals are forwarded to fire communication departments, especially during significant crises.
Step-by-step explanation:
A fire alarm receiver is a device that receives alarm signals from protected premises and re-transmits those signals to the Fire Department's Bureau of Fire Communication. This is a critical component in the public safety infrastructure, particularly in the context of the Public Safety and Homeland Security Bureau, which is responsible for developing and implementing communications for use during emergencies and crises. Following events like Hurricane Katrina, it's clear that effective communication systems are essential for coordinating response efforts and ensuring the safety of both emergency personnel and the general public.