Do police officers use codes on their walkie talkies? If not, why don't they just say 'I need backup at this location'? Or does this happen sometimes without being coded as such? -
Roger That: How to Communicate Using Radio Lingo
What's Up With "10-4" And Other Radio Lingo? | Mental Floss
What Do 10-4 And Other Radio Codes Mean?
10 Codes | PDF | Radio | Telecommunications
10-4 Meaning & Origin | Slang by Dictionary.com
Apco 10 Codes Current Codes: Code Code | PDF
Morse code - Wikipedia
Quick Learning Some Radio Ten Codes (Tagalog) - YouTube
10 Codes - 10 CODES 10-0 Caution 10-1 Unable to copy, change location 10-2 Signal Good, Loud and - Studocu