8/18/2021
LMU-2600 Hardware & Installation Guide - PULS Wiki
https://puls.calamp.com/wiki/LMU-2600_Hardware_%26_Installation_Guide
21/44
The IMEI, IMSI and ICC-ID are all available through the
ATI1
command. The IMEI should also be printed
on the bottom of the LMU.
You should also get an APN (Access Point Name) value. The APN is the device on the network that allows a
GPRS device (i.e. the LMU) to get to the internet. They tend to look like a URL, for example:
myAPN.myOperator.com
Operators can offer more than one type of APN and can even set up a custom APN just for your devices. The
rates they charge will vary depending on the APN service you want. Operators may also request you use a
blank APN. With the APN, you should also receive a username and password combination.
The last item an operator may provide is a SIM PIN. The PIN is effectively a password to the device. The
main difference here is that the PIN will restrict all the capabilities of the GSM device, where the SPC is used
just for configuration.
The activation sequence for a GSM LMU would therefore look as follows:
AT$APP PARAM 2306,0,“myAPN.myOperator.com”
AT$APP PARAM 2306,1,“myAPN.myOperator.com”
AT$APP PARAM 2314,0,“myUSername”
AT$APP PARAM 2315,0,“myPassword”
For a blank APN the following command can be used:
AT$APP PARAM 2306,0,“” (for a blank APN)
Only enter this next command if you have been given a non-zero PIN as any errors may lock you out of the
modem.
AT$APP PIN <SIM pin>
You can confirm activation by watching the Comm LED to see if it goes solid. You may also confirm
activation using
AT$APP COMM STATUS?
A good response should look similar to the following:
GSM Registered: Yes
GPRS Registered:
Yes
Connection:
Yes
RSSI:
-70 dBm
BER:
0
Channel:
0
Cell ID:
0
Base Station ID:
0
Local Area Code:
0
