Specifications

TC35i AT Command Set
Confidential / Released
TC35i_ATC_V01.05 Page 164 of 278 04.08.2003
double quote characters like a normal string type parameter
<pdu> For SMS: GSM 04.11 SC address followed by GSM 03.40
TPDU in hexadecimal format: ME/TA converts each octet of
TP data unit into hexadecimal numbers containing two IRA
characters (e.g. octet with integer value 42 is presented to
TE as two characters 2A (IRA 50 and 65)). In the case of
CBS: GSM 03.41 TPDU in hexadecimal format.
Reference
GSM 07.05
Note
· After invoking the commands CMGW, CMGS, CMGC wait for the
prompt ">" and then start to send text to the module. After the
prompt a timer will be started to observe the input.
· To send the message simply enter <CTRL-Z>. See Execute com-
mand for possible responses.
· Sending can be aborted by entering <ESC>. Of course, the mes-
sage will not be sent, though the operation is acknowledged with
OK.
· When sending e-mails via SMS check that, depending on the pro-
vider, the @ symbol will be recognized and correctly interpreted. If
not, make sure what character to use instead. A widely used alter-
native is typing “*”.
· At baudrates lower than 19200 it is recommended to use the line
termination character only (refer to ATS3, default <CR>, Chapter
2.21) before entering the text/pdu. Use of the line termination
character followed by the response formating character (refer to
ATS4, default <LF>, Chapter 2.22) 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 8.5 which pro-
vides 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.