Справочник Пользователя для Altech Auto Security AL7024S
AL7024S Quick Start Manual
No. AL7020S-QSM-101
Altec Electronic AG
Seite 16 / 18
4. Troubleshooting-guide
SIM-card recognized?
SIM-card can be tested by
SIM-card can be tested by
AT+CPIN?
Answer:
+CPIN: READY
. (Answer
:+CPIN: SIM
PIN
: you should enter PIN first).
Verify the signal-quality
with
AT+CSQ?
. (repeat command a couple of times every 10secs.) It should never
drop below 10, critical connections could work down to about 7. Find best antenna-
location with mobile phone.
location with mobile phone.
Network-attached?
To control that the module is connected to the network, you see the response of
AT+CREG
with the HEX-info about the cell. (First, enable CREG with
AT+CREG=2
)
DTE-baud-rates
Control if on both sides the data-rate of the DTE-DCE connection (of the computer-
terminal) is set higher than 9600 (best is 115200 as default for all applications). The
GSM-module can stay at autobaud (
terminal) is set higher than 9600 (best is 115200 as default for all applications). The
GSM-module can stay at autobaud (
AT+IPR=0
). For GPRS, set data-rate to 115200
baud.
If your application will work with lower DTE-rates, you can test these settings of
If your application will work with lower DTE-rates, you can test these settings of
AT+CBST
later, because 9600 is the standard of many modems. (19200/2400/1200
not working always). Set baud-rate on GSM-Module: use
AT+IPR
command.
Regarding hyper-terminal: We made bad experiences with it, sometimes it hangs up
and there is no comfort. We use Procomm 4.8 from Symantec, there you can also write
very comfortable scripts with window-support. Also as a dumb terminal, it is much more
reliable. They have also very good support in one day.
and there is no comfort. We use Procomm 4.8 from Symantec, there you can also write
very comfortable scripts with window-support. Also as a dumb terminal, it is much more
reliable. They have also very good support in one day.
The following steps apply to analog-modems and ISDN-TA's (digital phone-
connection).
Exceptions are marked.
connection).
Exceptions are marked.
There is never a simple "no connection". There are many causes for
this, which can be excluded step-by-step. If you never had a
successful data-connection, you should test first with an analog
modem at the other side. Also, if possible, avoid problems with local
company-exchanges, using a direct phone-line. This applies specially
if you call to a digital "modem" (ISDN-TA). You can test these
configurations later. It is also helpful, to test different numbers on both
sides. (ISDN/analog, direct/local exchange, mobile phone on called
side. Different providers for GSM-Module.
It is very recommended to make all tests in both directions, because in
many cases of failure, the other direction is working. This helps to find
the error.
this, which can be excluded step-by-step. If you never had a
successful data-connection, you should test first with an analog
modem at the other side. Also, if possible, avoid problems with local
company-exchanges, using a direct phone-line. This applies specially
if you call to a digital "modem" (ISDN-TA). You can test these
configurations later. It is also helpful, to test different numbers on both
sides. (ISDN/analog, direct/local exchange, mobile phone on called
side. Different providers for GSM-Module.
It is very recommended to make all tests in both directions, because in
many cases of failure, the other direction is working. This helps to find
the error.