Common errors such as entering an incorrect expiration date or incorrectly
entering a digit in a credit card number can result in an authorization failure. If
all of your billing information looks correct, please contact your financial institu-
tion for resolution.
GPS Technology
GPS Accuracy
GPS is the most widely used global positioning technology. Originally devel-
oped by the US Department of Defense, GPS is used for many different appli-
cations including, offshore ocean navigation, direction finding, exploration and
vehicle locating. Without Selective Availability, GPS is accurate to within a
radius of 6.3 meters of a location (95% of the GPS points fall within this radius).
There are inherent limitations to wireless communications and the Global
Positioning System (GPS).
Future of GPS Technology
VIPER
®
210V services leverage stable, reliable technology platforms with the
ability to implement future technological advancements. VIPER
®
210V is devel-
oped to support emerging wireless platforms and devices to ensure future
value and avoid obsolescence.
The VIPER
®
210V uses industry standard cellular wireless communications
networks (cellular) to communicate with vehicles. Therefore, vehicles must be
within cellular coverage to communicate. Cellular networks currently cover
approximately 95% of populated North America.
The GPS transceiver in the onboard device must have a direct line of sight with
three or more of the 24 satellites in the GPS constellation to provide accurate loca-
tion information. Underground parking garages, concrete enclosures and urban
26
© 2006 Directed Electronics all rights reserved
