Which signal requires officers to use a phone to contact home?

Signal 16 is indeed the correct response, as it specifically refers to a situation where officers are required to use a phone to contact their home base or command center. In law enforcement communication codes, different signals are coded to identify specific situations or actions that officers should take.

In this case, Signal 16 highlights the necessity for officers to make a phone call, which may be critical for reporting significant information or coordinating responses. Understanding this code and its implications allows officers to efficiently follow protocol and maintain proper communication with their peers and superiors. The other signals mentioned pertain to different meanings and situations that do not involve the specific task of making a phone call to home. This distinction is key for ensuring clarity in operational communication.