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Welcome to Teletrac's Prism TM Information and Installation Guide. The goal of this guide is
to give you an understanding of how the Prism TM functions and how the different systems it
uses function, as well as, how to install the Prism TM itself. As you make your way through this
guide, you will start to become familiar with many aspects of the Prism TM, however, nothing will
replace the hands-on experience of installing a unit and seeing how it functions in person. It is
hoped that you will use this guide as a reference to give you guidance whenever a problem is
encountered.
This guide starts with a discussion of the physical characteristics of the Prism TM and the
equipment it requires to function. Next is a brief introduction to the systems the Prism TM relys
upon to do it's job. After that will be a feature list to compare the Prism TM to an RF & CDPD
VLU along with descriptions of the features. Lastly is a section on how to install and test the
Prism TM. Now, let's get going...
P
TM
RISM
The Prism TM is a custom built
transceiver made for Teletrac. The
device
is
a
black
aluminum box roughly the same
size as a CD carrying case.
Internally it consists of a GPRS
modem,
a
GPS
receiver,
controller board and a SIM card.
The GPRS modem and GPS
receiver are basically off-the-shelf
devices. It's the SIM card that
makes this product unique.
1622-0300 B1 3/18/04
Teletrac, Inc. - Prism TM Information and Installation Guide
I
NTRODUCTION
--------------Unit One--------------
P
HYSICAL CHARACTERISTICS
anodized
a
The SIM (subscriber identity module) card is a small electronic board
that contains the "personality" of the unit. The SIM is a programmable
card that can easily be moved from one unit to the next so that in the
event of hardware failure the card can be remove and placed in a new
unit without any reprogramming. SIM cards and the GPRS system run
on the GSM network which is considered to be one of the most secure
communication systems since both data and voice are encrypted to
prevent eavesdropping. See Section Two for more information about
how GSM, GPRS and SIM cards work.
In theory, the Prism TM should work about the same as a VLU
has been purposefully designed to have a similar wiring scheme and
to use the same installed peripherals. See Unit Five for installation
information.
plus
. It
7
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