What action does Signal 19 require?

Signal 19 is used to indicate that a message or information needs to be relayed by phone. This signal is essential for ensuring that critical updates or situations are communicated efficiently and directly to the relevant parties or units who may not have immediate access to radio communication. Using a phone ensures that there is a clear and direct line of communication, which can be crucial in urgent or complex scenarios where clarity is paramount. By implementing this protocol, responders can ensure that they are effectively coordinating their actions and sharing important information without the delays that might occur through other communication channels.