Zonar tracking that is used by your company works not like you think it works. They have the tracking device called V2J and the improved version called Wombat. I guess your company is using the second one because it is developed to work in any conditions like rain, dust, snow, dirt and so on. And now some details about how it really works.
Wombat works as GPS tracking device that provides your company with performance data of your vehicle, its location and real-time position tracking. Thus your location and the condition of your vehicle will be known to your company at all times and tracked in any place. You cannot reach it because Wombat is the rugged case with V2J tracking device working inside of it.
Still you can avoid being tracked by your company. To do that you need to block the Zonar tracking in your truck and its location tracking data will not be available to your company's operators. This will be done by means of GPS jammer:
answered Jan 11 '12 at 05:50