LTE Module Series
EC25&EC21 AT Commands Manual
EC25&EC21_AT_Commands_Manual 186 / 231
Parameter
1. When <n>=1 and a supplementary service notification is received after a mobile originated call setup,
the +CSSI intermediate result code is sent to TE before any other MO call setup result codes:
+CSSI: <code1>
2. When <m>=1 and a supplementary service notification is received during a mobile terminated call
setup or during a call, the +CSSU unsolicited result code is sent to TE:
+CSSU: <code2>
11.8. AT+CUSD Unstructured Supplementary Service Data
The command allows control of the Unstructured Supplementary Service Data (USSD) according to
3GPP TS 22.090. Both network and mobile initiated operations are supported.
Parameter <mode> is used to disable/enable the presentation of an unsolicited result code. The value
<mode>=2 is used to cancel an ongoing USSD session. For an USSD response from the network, or a
network initiated operation, the format is: +CUSD: <status>[,<rspstr>,[<dcs>]].
<n> Integer type. Sets/shows the +CSSI intermediate result code presentation status to the
TE
0 Disable
1 Enable
<m> Integer type. Sets/shows the +CSSU unsolicited result code presentation status to the
TE
0 Disable
1 Enable
<code1> Integer type. It is manufacturer specific and supports the following codes:
0 Unconditional call forwarding is active
1 Some of the conditional call forwardings are active
2 Call has been forwarded
3 Waiting call is pending
5 Outgoing call is barred
<code2> Integer type. It is manufacturer specific and supports the following codes:
0 The incoming call is a forwarded call
2 Call has been put on hold (during a voice call)
3 Call has been retrieved (during a voice call)
5 Held call was terminated by another party
10 Additional incoming call forwarded
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