Terms to know

Mutual Aid - giving assistance to another officer and/or department
Call for Service - any action done by an officer
Dispatched Call - when an officer is sent to respond to a situation
Non-Dispatched Call - an officer-initiated response
Alarm Drop - when a security alarm alerts law enforcement of a potential breach
Stationary Traffic Enforcement - enforcing traffic laws while parked
On Patrol - when an officer is actively patrolling an area