Specifications

Chapter 13 – Short Message Service (SMS) Commands
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371B) 171
Chapter 13. Short Message Service
(SMS) Commands
The AT Commands described in this chapter allow an external application to use the Short Message Service with the
Multi-Tech wireless modem.
13.1 SMS Parameters
Parameter Descriptions:
<ackpdu>
Format is same for <pdu> in case of SMS, but without GSM 24.11 SC address field and parameter shall be
bounded by double quote characters like a normal string type parameter.
<alpha>
String type alphanumeric representation of <da> or <oa> corresponding to the entry found in phonebook;
implementation of this feature is manufacturer specific.
<cdata>
Command Data
GSM 03.40 TP-Command-Data in text mode responses; ME/TA converts each 8-bit octet into two IRA character
long hexadecimal numbers (e.g., octet with integer value 42 is presented to TE as two characters 2A (IRA 50
and 65))
<ct>
Command Type GSM 03.40 TP-Command-Type in integer format.
0...255. Default = 0.
<da>
Destination Address
Type of address given by <toda>. GSM 03.40 TP- Destination-Address Address-Value field in string format; BCD
numbers (or GSM default alphabet characters) are converted into characters;
<data>
User Data
In case of SMS: GSM 03.40 TP-User-Data in text mode responses; format:
• If <dcs> indicates that GSM 03.38 default alphabet is used and <fo> indicates that GSM 03.40 TP-User-
Data-Header-Indication is not set: ME/TA converts GSM alphabet into current TE character set according
to rules covered in Annex A.
• If <dcs> indicates that 8-bit or UCS2 data coding scheme is used or <fo> indicates that GSM 03.40
TPUser-Data-Header-Indication is set, then the ME/TA converts each 8-bit octet 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 case of CBS: GSM 03.41 CBM Content of Message in text mode responses; format:
• If <dcs> indicates that GSM 03.38 default alphabet is used: ME/TA converts GSM alphabet into current
TE character set according to rules covered in Annex A.
• If <dcs> indicates that 8-bit or UCS2 data coding scheme is used: ME/TA converts each 8-bit octet into
hexadecimal numbers containing two IRA characters.
<dt>
Discharge Time
GSM 03.40 TP-Discharge-Time in time-string format: “yy/MM/dd,hh:mm:ss+zz”, where characters indicate year
(two last digits), month, day, hour, minutes, seconds and time zone. For example, 6
th
of May 1994, 22:10:00
GMT+2 hours equals “94/05/06,22:10:00+08”
<ieia>
IEIa (Information Element Identifier octet) of the concatenated SMS.
8 Concatenated short messages, 8-bit reference number.
16 Concatenated short messages, 16-bit reference number.
<index>
Integer type; value in the range of location numbers supported by the associated memory .