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GSM M1 Module, English: A24859-N4000-A100-1-7677
gsm-m1-e.fm
Installation / startup
6.3.96
In order to test the interface and your settings, enter AT. The GSM module should then
respond with OK. If it does not do so, configure a different interface in the communi-
cation program and try again. Also check the cable. When this test has been success-
fully completed, check the functionality of the GSM module by entering AT&T1. This
command activates a test loop. From now on, all the characters entered from your
GSM module should be echoed on the computer. Terminate the test by entering the
escape sequence +++. If the test is acknowledged by the NO CARRIER code, the
GSM module’s data functionality is operating correctly.
The transfer rate (baud rate) via the radio interface can be set, for example, using a ter-
minal program. The ATBn command allows you to set the transfer rate in the GSM net-
work.
Enter the ATI8 command to display the current list.
Example:
Enter: ATB13
M1 Permanently switches mode to 9600 bit/s.
Enter: ATB7
M1 Permanently switches mode to 2400 bit/s.
Setting the GSM radio transfer rate
ATBn [n=7,11,13,25,27,29,70,99]
Option Effect
Bit/s Synchronism Distant station
ATB99 9600 Asynchronous Mode set to automode
ATB7 2400 Asynchronous V.22bis
ATB11 4800 Asynchronous V.32
ATB13 9600 Asynchronous V.32
ATB25 2400 Asynchronous V.110 ISDN
ATB27 4800 Asynchronous V.110 ISDN
ATB29 9600 Asynchronous V.110 ISDN
ATB70 9600 Fax Fax Group 3
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