Siemens MC55 AT manual 14 AT+CUSD Supplementary service notifications, At+Cusd=?, At+Cusd?

9.14AT+CUSD Supplementary service notifications

AT+CUSD allows control of the Unstructured Supplementary Service Data (USSD) according to GSM 02.90. Both network and mobile initiated operations are supported. The interaction of this command with other commands based on other GSM supplementary services is described in the GSM standard.

Parameter <n> is used to disable/enable the presentation of an unsolicited result code (USSD response from the network, or network initiated operation) "+CUSD: <m>[<str_urc>[<dcs>]]" to the TE.

When parameter <str_write> 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 result code "+CUSD"

Syntax

Test Command

AT+CUSD=?

Response(s)

+CUSD: (list of supported<n>s)

OK

Read Command

AT+CUSD?

Response(s)

+CUSD: <n>

OK

Write Command

AT+CUSD=<n>[, <str_write>[, <dcs>]]

Response(s)

OK

+CME ERROR

Reference(s)

GSM 07.07, GSM 02.90, GSM 03.90, GSM 04.90

PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge  Last

% % % % % % ! ! !

Unsolicited Result Code

+CUSD: <m>[<str_urc>[<dcs>]]

URC "+CUSD" indicates an USSD response from the network, or network initiated operation

Parameter Description

<n>(num)

0(&F)	Disable the result code presentation in the TA
1	Enable the result code presentation in the TA
2	Cancel session (not applicable to read command response)

<str_write>(str)

String type USSD-string (when <str_write> parameter is not given, network is not interrogated). For the write command, only <dcs>= 15 is supported.

MC55_ATC_V04.00	Page 217 of 475	3/17/06
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