Siemens M1 User Manual
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GSM M1 Module, English: A24859-N4000-A100-1-7677
gsm-m1-e.fm
Technical reference section
6.3.96
The user memory can hold 4 telephone numbers. The AT&Zn= command allows you
to store a dial string in telephone number memory "n" (n represents a value from "0" to
"3").
Example:
Enter:
AT&Z0 = 01999341
GSM module:
OK
The AT&Zn= command saves only digits and special characters ("i", "+"). It ignores punc-
tuation, spaces and all meaningless characters. The dial string must contain no more
than 20 characters. If you enter a longer dial string, it is not stored and the ERROR code
is displayed on the screen. The AT&Zn= command itself is not stored with the dial
string.
The ATDS=n command allows you to dial the "n"-th stored telephone number (n repre-
sents a value from "0" to "3"). This command dials the dial string as though it were a
telephone number entered directly via the keyboard.
Example:
Enter:
ATDS=0
GSM module:
01999341
and initiates the dialing procedure.
When you modify the active configuration profile using AT or S-register commands,
these modifications exist only in the RAM and are deleted when you switch off your
GSM module. When switched on again, the GSM module loads the configuration from
a nonvolatile memory. The AT&Wn command allows you to store your modifications in
this nonvolatile memory. Two separate memory areas are available for this purpose.
Consequently, you always have two different user profiles in your GSM module ready
to be called up.
AT&Zn=x - Store telephone number
ATDS=n - Dial stored telephone number
AT&Wn - Store configuration
AT&Wn
[n=0,1]
Option
Result
AT&W0
Stores the active configuration profile in user memory "0".
AT&W1
Stores the active configuration profile in user memory "1".