Installation guide

LMU Users Guide

V1.0.6 December 10 2009

- 118 - CalAmp Proprietary & Confidential

As far as the LMU’s setup goes, we need to know the follow about the application:

• Messaging occurs at 19200 BAUD, 8 Data Bits, No Parity and 1 Stop Bits.

• Every Message is terminated by a Line Feed character (0x0A)

For our credit card reader we will be using some measure of Point of Sale Terminal

. The

terminal itself would need a serial connection and a printer to meet our needs. For this

example we will assume that the serial port settings are the same as the Net955.

For the Inbound side we will be using another server in our data center, though we will not

be accessing it from its public IP address. We have purchased a frame-relay link from the

CDMA carrier in order to have a secure path between the LMU and data center. All LMUs

will be assigned a 10.90.81.x address and our server will appear as 10.90.80.242.

14.3.4 LMU Setup – Development

14.3.4.1 Setting up the Inbound Address

The frame relay link we have between the CDMA carrier and our data center has defined

what Inbound IP Address we should use, namely 10.90.80.242. We have not bothered to set

up a URL as we are in a closed network and thus have no need for DNS services from the

carrier.

Our first two setup commands therefore are:

AT$APP INBOUND 10.90.80.242:20500

AT$APP PARAM 2319,0,””

14.3.4.2 Configuring the Host Port

We will be using the Host Port in MDT mode to manage the Net955 connection for the

dispatch application. This part of our setup will therefore focus on S-Registers 130-138.

Our starting point will be in selecting the type of User Message to work with, either the

standard User Message or the User Message with Accumulators. In looking at the PEG

Script we find that the accumulators are only meaningful after certain events (e.g. Ignition

off, moving, etc…) so there’s no point in reporting them as part of the User Message. This

means we should clear bit 1 of S-Register 140.

AT$APP PARAM 1024,20,2,0

Keep in mind that this setting affects the User Messages created by both the Host Port and

Aux Port.

At this point we should also choose the disposition of the message, that is, should it be

logged. In this case the answer is yes. Even if the vehicle is out of coverage we will want the

HyperCom or VeriFone would be likely sources.