What does "code and signal 21" refer to in communication?

"Code and signal 21" typically refers to an alarm status check in communication within law enforcement and emergency response contexts. This designation is used to prompt personnel to verify the status of alarm systems, ensuring that any alerts or notifications are addressed appropriately. It serves as a crucial reminder for dispatchers and responders to confirm whether an alarm is operational or if there is a need to investigate further based on the nature of the alarm.

Understanding this code is essential for effective communication in emergency situations, where quick response times can make a significant difference in outcomes. The use of specific codes and signals, such as "code and signal 21," helps streamline communication, reduces misunderstandings, and allows for quicker deployment of resources when necessary.