To signify effectively that a transmission should be stopped, which code should be used?

The code that is used to signify that a transmission should be stopped is 10-3. This code is widely recognized in law enforcement communication as a request for silence or for radio traffic to cease, particularly in situations where sensitive information may be discussed, or when a specific scenario requires reduced noise to ensure clarity or security.

In contrast, while other codes have their respective meanings, they do not serve the purpose of requesting that a transmission be halted. For instance, 10-5 generally refers to relaying information from one unit to another, 10-7 indicates an out-of-service status, and 10-4 is an acknowledgment of receipt of a message rather than a directive to stop communicating. Understanding the distinct function of each code is crucial for maintaining effective communication within law enforcement operations.