Siemens TC37 Module At Command Reference page 129

AT Command Set
Reference
GSM 07.05
TC3X_ATC_01_V04.00
Note
· After invoking the commands CMGW, CMGS, CMGC wait for the
prompt ">" and then start to send text to the module.
· To send the message simply enter <CTRL-Z>. See Execute
command for possible responses.
· Sending can be aborted by entering <ESC>. Of course, the
message will not be sent, though the operation is acknowledged
with OK.
· Sending e-mails via SMS: Note that some providers do not
recognize @ symbol. Possible alternative "!" for "@"
· At baudrates lower than 19200 it is recommended to use the line
termination character only (refer to +ATS3, default <CR>, pg. 28)
before entering the text/pdu. Use of the line termination character
followed by the response formating character (see +ATS4, default
<LF>, pg. 28) can cause problems.
· All characters entered behind the ">" prompt will be recognized as
GSM characters. For example, "Backspace" (ASCII character 8)
does not delete a character, but will be inserted into the SMS as an
additional physical character. As a result, the character you wanted
to delete still appears in the text, plus the GSM code equivalent of
the Backspace key. See also Chapter 7.5 which provides the
supported alphabet tables.
· In text mode, the maximum length of an SMS depends on the used
coding scheme: It is 160 characters if the 7 bit GSM coding scheme
is used, and 140 characters according to the 8 bit GSM coding
scheme.
Page 129 of 204 29.05.2002