Multi-Tech Systems MMCModem GPRS (MTMMC-G) - Manual (Page 72)

Chapter 9 – Short Messages Commands
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 72
Send Message from Storage +CMSS
Description: This command sends a message stored at location value .
Values: Location of stored message
Desination address
Type of destination address
Message reference
Syntax: Command syntax: AT+CMSS=[, [,] ]
Response syntax: +CMSS: or +CMS ERROR: if sending fails
If a new recipient address is given, it will be used instead of the one stored with the message.
Command Possible responses
AT+CMGW=0660123456
Today is my birthday
+CMGW: 5
OK
Note: Message stored with index 5
AT+CMSS=5, 0680654321
Note: Send the message 5 to a different destination number AT+CMSS:
OK
Note: Successful transmission
Set Text Mode Parameters +CSMP
Description: This command selects values for , , and .
Values: byte comprises 6 different fields:
b7 b6 b5 b4 b3 b2 b1 b0
RP UDHI SRR VPF RD MTI
Note: must be entered in DECIMAL format. Hexadecimal format would lead to
irrelevant results
RP Reply Path, not used in text mode.
UDHI User Data Header Information, b6=1 if the beginning of the User Data field contains a
Header in addition to the short message. This option is not supported in +CSMP
command, but can be used in PDU mode (+CMGS).
SRR Status Report Request, b5=1 if a status report is requested. This mode is supported.
VPF
Validity Period Format
b4=0 & b3=0 -> field is not present
b4=1 & b3=0 -> field is present in relative format
Others formats (absolute & enhanced) are not supported.
RD Reject Duplicates, b2=1 to instruct the SC to reject an SMS-SUBMIT for an SM still
held in the SC that has the same and as the previously submitted SM
from the same .
MTI Message Type Indicator
b1=0 & b0=0 -> SMS-DELIVER (in the direction SC to MS)
b1=0 & b0=1 -> SMS-SUBMIT (in the direction MS to SC)
In text mode is only coded in “relative” format. The default value is 167 (24 hours). This
means that one byte can describe different values:
VP value Validity period value
0 to 143 (VP + 1) x 5 minutes (up to 12 hours)
144 to 167 12 hours + ( (VP – 143) x 30 minutes )
168 to 196 (VP – 166) x 1 day
197 to 255 (VP – 192) x 1 week
This is used to indicate the higher layer protocol being used or indicates interworking with a
certain type of telematic device. For example, 0x22 is for group 3 telefax, 0x24 is for voice
telephone, 0x25 is for ERMES (European Radio Messaging System).
This is used to determine the way the information is encoded. Compressed text is not
supported. Only GSM default alphabet, 8 bit data and UCS2 alphabet are supported.