10-1
Emergency! The officer needs immediate assistance.
10-2
An officer requested backup.
10-3
All units, stand by.
10-4
Acknowledged, message received.
10-5
Arrived at the scene.
10-6
Busy on another task; unable to respond immediately.
10-7
Out of service, not available.
10-8
Available for new tasks.
10-9
Repeat message.
10-10
Negative response or no further action.