If you are experiencing problems connecting to the cellular network, you can verify if the
issue is between the computer and the modem or between the modem and the cellular
network. To test, open your terminal emulation software as described in the
"Using
Terminal Emulation Software To Talk To The Modem"
section 3.0 above. Once the
modem is ready to accept commands, type:
AT&V
†
and press enter. The modem should
respond with several lines of configuration information. If you receive the lines of code,
then your computer and the modem are properly communicating.
To test the link between your modem and the cellular network, type:
ATDT
<phone
number to call>
.
This command will perform a circuit-switched call similar to the type a
standard home phone or modem would make. If the modem is communicating with the
cellular network, then you should connect to the phone number specified. If you are
properly communicating with the modem using the steps above and still cannot connect
through the cellular network, here are a few items to check:
1. Call the phone number of the modem. If the phone number is not active, the cellular
service will inform you of this.
2. Contact your cellular provider and make certain that the Electronic Serial Number
(ESN) of the modem is active in their system.
3. Check the signal strength reaching the modem using the following command:
AT+CSQ?
†
See also the FAQ for more information on
"No Carrier"
issues.
4. Attempt to relocate the modem and/or antenna to receive a stronger signal.
5. Make certain that the modem has been provisioned by the cellular network. To
provision the unit, issue this command:
AT+CDV*22899
†
For more information, see the
"How Do I Perform An Over-the-Air Activation Of The Unit?"
section 11.3 in the FAQ.
NOTE: Running diagnostics from Modem Properties may not work if the computer
attempts to communicate with the modem at an improper baud rate.
5.3 Altering The Modem’s Cellular Parameters
If you have subscribed to a cellular provider using the serial number printed on the case
of the modem, but still cannot provision the unit, you may need to program the
Mobile
Identification Number
(MIN),
Mobile Country Code
(MCC) and/or the
Mobile Network
Code
(MNC). The next five sub-sections explain how to change these parameters.
If you simply need to enter the phone number (MIN), then follow these steps below:
AT+LCPAST=1
AT$KWMODE=1
AT$KWSPC=000000
AT$KWDIR=
10-Digit Phone Number From Cellular Carrier (Without Hyphens)
AT$KWMODE=2
AT+CDV*22899
NOTE: The commands to alter the MIN, MCC and MNC communicate with the RF
module directly and as such require that the
AT+LCPAST=1
command be issued before
proceeding. See the sections below for more information on altering the MIN, MCC and
MNC.
5.4 Entering Offline Digital Mode
In order to change the MIN, MCC or the MNC, you must first change the operational
