iTegno 39XX GPRS Modem
AT Commands Guide
02000C17
•
v1.5
Confidential
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document. It may not be edited, copied or circulated without prior written agreement by iWOW Connections Pte Ltd. © 2011, 2012 iWOW
Connections Pte Ltd
115
8.9
Unstructured Supplementary Service Data +CUSD
Description:
This command allows control of the Unstructured Supplementary Service Data (USSD) according to 3GPP
TS22.090 [23].Both network and mobile initiated operations are supported. Parameter <n> (refer to defined
values) is used to disable/enable the presentation of an unsolicited CUSD: <m> [, <str>, <dcs>] to the
TE. In addition, value <n>=2 is used to cancel an ongoing USSD session
When <str> is given, a mobile initiated USSD-string or a response USSD-string to a network initiated operation
is sent to the network. The response USSD-string from the network is returned in a subsequent unsolicited
+CUSD result code.
Note: In case of successful mobile initiated operation, TA implemented according to a version prior to 6 of this
standard, waits the USSD response from the network and sends it to the TE before the final result code .This will
block the AT command interface for the period of the operation. Such TA does not support <n> value 2.
• Read command gives the current status of the result code presentation to the TE (disable/enable).
• Test command returns values supported as a compound value.
Syntax:
AT+CUSD=[<n>[,<str>[,<dcs>]]]
Command
Possible Responses
AT+CUSD=[<n>[,<str>[,<dcs
>]]]
OK
or
+CME ERROR: <err>
AT+CUSD?
+CUSD: <n>
OK
AT+CUSD=?
+CUSD: (list of supported <n>s)
OK
AT+CUSD=1,”*100#”
OK
Note: USSD response will display subsequently
AT+CUSD=?
+CUSD: (0,1,2)
OK
AT+CUSD=1
OK
ATD*100#
OK
+CUSD: 1,"#100# Menu
1> Top-up
2> Balance enquiry … …
