AT$APP PARAM 1024,35,1,0
Auto-provisioning occurs when the TTU detects a SIM with a new operator ID (i.e. the first 6 digits of
the IMSI) or when Bit 0 of S155 is cleared and the GPRS context is blank (i.e. Parameter 2306,0).
4.3 Activating GSM or HSPA TTU using AT Commands
Check with the CalAmp Sales team for availability of the TTU-453
0™ with GSM or HSPA
modems.
For a GSM/GPRS operator you will get the TTU in one of two varieties, one with a SIM and
one without.
If you get an TTU without a SIM (which is the typical case) the operator will simply ask for the IMEI of
the TTU. The IMEI (International Mobile Equipment Identifier) is printed on the bottom of the TTU
under the TTU
’s ESN. Again, DO NOT give the operator the ESN of the TTU.
The operator will provide you with a SIM for each account activated. If they are especially nice (or you
are especially persistent) they will also give you a list tying the IMSI (International Subscriber Identifier)
of the SIM to the phone number assigned to it. Please note that the operator will likely tie the IMSI (i.e.
the SIM) to a specific IMEI. Making sure the specific SIM matches to the right IMEI isn’t strictly
necessary, but it will keep everyone’s book-keeping a little cleaner. You may also obtain this
information by running a CSV report in PULS (after the devices have connected to the network and
sent in their first ID Report). See the PULS Users Guide for more information.
If you do happen to have a SIM, the operator will ask for the IMSI and ICC-ID (Integrated Circuit Card
Identifier) along with the IMEI of the TTU. Again, in return you should get a list of IMSIs and Phone
Numbers.
The IMEI, IMSI and ICC-ID are all available through the
ATI1
command. The IMEI should also be
printed on the bottom of the TTU.
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 TTU) 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.