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B. System Introduction
AVL-900 is a high-tech product through cooperation with mobile operators. It
combines GPS Global Positioning System and GSM/GPRS communication system,
which can clearly inform you the position & situation of your car.
GPS is the abbreviation for Global Positioning System, which is a product of the
cold war between USA and USSR. During the cold war, USA arranged 24 position
location satellites around the earth orbit, in order to measure the space coordinate
and time of the measured objects through the triangular location method. These
satellites were initially for military purpose. Then, they were allowed to be used for
civilian purpose. Their locating precision can be kept within 10 to 15 meters.
GSM is the second digital mobile communication system (GPRS, second and
fifth digital mobile communication system), and at present it is the mobile
communication system that has the largest coverage and owns the most number of
users. This product combines GPS and GSM/GPRS technologies together. It uses
GPS system to locate your car, and sends the position/ situation report back to you
via GSM/GPRS communication system.
With a delicate microphone, you can monitor the present situation in your car
from a faraway place. You can use the telephone remote control function to set
monitoring mode, which will report the situation of your car to you periodically.
Following are the function descriptions for the AVL-900 products.
1. In-Car Monitoring Function
You can monitor the situation inside the vehicle by make a call (after 5 rings) to
the unit; or by sending a SMS message (100) to the unit; it will return phone call
automatically for monitoring action.
2. GPS Position Tracking Function
With this function, the vehicle owner will be able to know the geographic
coordinates, speed, direction, and other related information of the car anytime in
any place. The report methods can be via SMS short message service, or via
GPRS. You can also select a one time report or continuous report (tracking
function).
