서비스 State (ServiceState)

ServiceState ::= ENUMERATED {
    unknown                   (0),
    outOfService              (1), -- Vehicle is not being used for official purposes
                                   -- and does not have any special rights or
                                   -- requirements.
    inServiceNotActive        (2), -- No call is active. Vehicle is officially on duty
                                   -- but not currently responding to a service
                                   -- request.
    inServiceNonEmergency     (3), -- Non-emergency call active. Vehicle is officially
                                   -- on duty and is actively handling a non-emergency
                                   -- service call.
    inServiceEmergency        (4), -- Emergency call active. Vehicle is officially
                                   -- on duty and is actively handling an emergency
                                   -- service call.
    inServiceEmergencyStealth (5), -- Emergency call active (stealth mode).
                                   -- Vehicle is officially on duty and is actively
                                   -- handling an emergency service call without
                                   -- lightbars or sirens. This may include the
                                   -- requirement for silent channel access priority.
    ...
}