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LMU Users Guide

V1.0.6 December 10 2009

- 100 - CalAmp Proprietary & Confidential

13.1

LMU Maintenance

The Mobile ID is intended to be a unique identifier that would allow a remote application to

identify which LMU sent an incoming message The Mobile ID is contained within the

options header of an LM Direct message and is normally tagged on each message created by

the LMU.

Mobile ID

Users have several options on what value can be used for the Mobile ID. They are as

follows:

• The serial number of the LMU (i.e. the ESN)

• The serial number of the Modem (IMEI for GSM and iDEN and ESN-Dec for

CDMA)

• The IMSI assigned to the SIM Card

• A user defined value (1 to 15 digits long)

• The phone number of the modem (when available)

• The IP address assigned to the modem (this is only useful when in a static IP

addressing environment)

The selection of which value is used as the Mobile ID is controlled by S-Register 145. The

available settings are:

0 = OFF/ No Mobile ID

1 = the Electronic Serial Number of the LMU (ESN)

2 = the serial number of the Modem (IMEI for GSM and iDEN devices, the ESN-

Dec for CDMA devices)

3 = the subscriber identifier (IMSI for GSM and iDEN, the IMSI_T for CDMA)

4 = User Defined

5 = Phone Number

6 = IP Address

For instance, to change the Mobile ID to be the serial number of the modem, you would

use:

ATS145=2

Both the User Defined and Phone Number Mobile IDs can be programmed by the user.

The one exception here is in the CDMA LMU which can only be programmed with a User

Defined Mobile ID value. The phone number is programmed into the LMU’s CDMA

modem and thus is always available.

To program the User Defined mobile ID, you would use: