Los Angeles County Sheriff's Department (LASD) RADIO Practice Exam

Which situation involves a sudden and unexplained disconnection?

1. Emergency call response

2. 9-1-1 hang up

3. Noise complaint

4. Routine check

The correct answer is: 9-1-1 hang up

A situation that involves a sudden and unexplained disconnection is best represented by a 9-1-1 hang up. This specific scenario typically occurs when a caller dials 9-1-1 but then abruptly disconnects the call before providing any information or context, leaving emergency services with questions about whether assistance is needed. The emergency dispatch protocol often mandates that the call be traced back to ensure the safety of the caller, as it may indicate an emergency situation where the person could not speak due to fear or other circumstances. In contrast, emergency call responses usually involve conversations with dispatch to relay critical information, noise complaints are typically more straightforward and involve detailed reporting by the caller, and routine checks are planned communications rather than unexpected disconnections. These other situations do not inherently involve a sudden stop of communication without context, making the 9-1-1 hang up the most appropriate choice when considering a disconnection that is both sudden and unexplained.