HC25 AT Command Set - Portech.com.tw

HC25 AT Command Set
9.13 AT+CUSD
s
(str)(+CSCS)
String type USSD-string .
If indicates that GSM 03.38 default alphabet is used TA converts GSM alphabet into current TE character
set according to rules of GSM 07.05 Annex A. Otherwise in case of invalid or omitted conversion of
is not possible.
(num)
GSM 03.38 Cell Broadcast Data Coding Scheme in integer format (default 15). In case of an invalid or omitted
from the network side (MT) will not be given out.
(num)
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).
If =1, then user input has to be done with an additional AT+CUSD=1 command
.
2 USSD terminated by network.
3 other local client has responded, this means the interface was not idle and an
busy was send to the network already
5 network time out
Notes
• When a USSD string is sent via ATD, a "AT+CUSD=1" is executed implicitly.
• It is recommended to finalize or escape a pending USSD user interaction before further actions are done to
prevent blocking situations.
• If a network initiated operation is left unanswered, several error codes may be output. The first error code is
given when the AT command is timed out. Other network indications may follow, depending on the network.
HC25_ATC_V01.200 Page 156 of 290 7/25/07
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