All police communication codes in AL
10-01: Unable to Copy
10-02: Copy Readable
10-03: Affirmative
10-04: OK (Acknowledgement)
10-09: Repeat
10-11: Negative
10-18: Any Traffic/Messages Query
10-19: No Traffic (Response to 10-18)
10-20: Location
10-21: Call Headquarters
10-22: Call This Number
10-25: Disregard Last Statement