| 摘要 |
A vehicle tracking unit may include a user indicator, a vehicle position determining device, a wireless communications device, and a controller. The controller is preferably switchable between an unregistered mode and a registered mode. In the registered mode, the controller may cooperate with the wireless communications device and the vehicle position determining device to determine and send vehicle position information to the monitoring station. In the unregistered mode, the controller may activate the user indicator to encourage registration by the user. The controller may be switchable to the registered mode based upon an activation message from the monitoring station, and, conversely, the controller may be switchable to the unregistered mode based upon a deactivation message from the monitoring station. The user indicator may also be activated based upon a warning message from the monitoring station indicating that the user's registration is about to expire.
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