Quectel UG Series User Manual

UMTS/HSPA Module Series
WCDMA UGxx AT Commands Manual
WCDMA_UGxx_AT_Commands_Manual Confidential / Released 181 / 247
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 error is 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
Quectel
Confidential

Quectel UG Series Specifications

General

Brand	Quectel
Model	UG Series
Category	Control Unit
Language	English