Installation Guide

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LMU-303x Hardware & Installation Guide
2.2 Component Descriptions
2.2.1 Wireless Data Network
The Wireless Data Network provides the information bridge between the LM Direct™ server and the
LMU303x™. Wireless data networks can take a variety of forms, such as cellular networks, satellite systems or
local area networks. Contact the CalAmp sales team for the networks available to the LMU-303x™.
2.2.2 LMU-303x™
The LMU-303x™ is responsible for delivering the location and status information when and where it is needed.
Data requests mainly come from the following sources:

PEG-2™ script within the LMU-303x™

A location or status request from the LM Direct™ server
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A location or status request from LMU Manager

An SMS request made from a mobile device such as a customer’s cell-phone
In some cases, it is necessary to run an application in the vehicle while it is being tracked by the backend
software. Such examples could include instant messaging between vehicles or a central office, in-vehicle
mapping or driving directions, email or database access. In most of these cases you will be using the LMU-
303x™ as a wireless modem as well as a vehicle-location device.
2.2.3 LM Direct™ Server
LM Direct™ is a CalAmp proprietary message interface specification detailing the various messages and their
contents the LMU-303x™ is capable of sending and receiving. This interface allows System Integrators to
communicate directly with LMU-303x's™. Please refer to the LM Direct Reference Guide for details.
2.2.4 Backend Software
Backend software is a customer provided software application. Regardless of its purpose, one of its primary
functions is to parse and present data obtained from the LM Direct™ server. This allows the application to do
any of the following:

Display location database on reports received from the LMU-303x™ in a variety of formats

Present historic information received from the LMU-303x™, typically in a report/chart style format

Request location updates from one or more LMU-303xs™

Update and change the configuration of one or more LMU-303xs™