LTE Module Series
EC25&EC21 AT Commands Manual
EC25&EC21_AT_Commands_Manual 187 / 231
When
<reqstr>
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
+CUSD
URC.
Parameter
AT+CUSD Unstructured Supplementary Service Data
Test Command
AT+CUSD=?
Response
+CUSD:
(list of supported
<mode>
s)
OK
Read Command
AT+CUSD?
Response
+CUSD: <mode>
OK
Write Command
AT+CUSD[=<mode>[,<reqstr>[,<dcs>
]]]
Response
OK
ERROR
If there is any error related to ME functionality:
+CME ERROR: <err>
Maximum Response Time
120s, determined by network.
Reference
3GPP TS 27.007
<mode>
Integer type. Sets/shows the result code presentation status to the TE
0 Disable the result code presentation to the TE
1 Enable the result code presentation to the TE
2 Cancel session (not applicable to Read Command response)
<reqstr>
Unstructured Supplementary Service Data (USSD) to be sent to the network. If this
parameter is not given, network is not interrogated.
<rspstr>
Unstructured Supplementary Service Data (USSD) received from the network
<dcs>
Integer type. 3GPP TS 23.038 Cell Broadcast Data Coding Scheme (default 15)
<status>
USSD response from the network or the network initiated operation
0 No further user action required (network initiated USSD Notify, or no further
information needed after mobile initiated operation)
1
Further user action required (network initiated USSD Request, or further
information needed after mobile initiated operation)
2
USSD terminated by network
3
Another local client has responded
4
Operation not supported
5
Network time out