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USSD session
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March 30, 2017
10:31 am
Henk Helmantel
Admin
Forum Posts: 713
Member Since:
May 28, 2013
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Diafaan SMS Server only supports a single USSD request-response sequence. It does not support USSD menus or other multi-level USSD transactions. There is no way to link the USSD response to the USSD request except by comparing the time of the command with the time of the response.

The '+CUSD: 4' response means 'Operation not supported'. The AT command specifications defines the following response codes for the 'AT+CUSD' command:

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: other local client has responded
4: operation not supported
5: network time out

Regards, Henk

March 30, 2017
3:57 am
EL
Guest
Guests

Hi, i have 2 questions.

1) is there anyway we can determine USSD reply is from Which id we sent?
eg.
1) Send "*123#"
2) USSD Reply "Press 1 to Continue"
3) Send "1"
4) USSD Reply "You Have successfully ...."

How can we know that "4)" is the reply for "1)"

2) Sometimes i send USSD to the modems. it reply CUSD:4 Diafaan do not handle it.

2017/03/30 09:52:27.225 > AT+CUSD=1,"*201*91234567*10*654321#",15
2017/03/30 09:52:27.280 < OK
2017/03/30 09:52:27.381 < +CUSD: 4
2017/03/30 09:52:29.287 > AT+CMGL=4
2017/03/30 09:52:29.331 < OK
2017/03/30 09:52:34.337 > AT+CMGL=4
2017/03/30 09:52:34.381 < OK
2017/03/30 09:52:39.415 > AT+CMGL=4
2017/03/30 09:52:39.459 < OK
2017/03/30 09:52:39.470 > AT+CUSD=1,"*201*81234567*10*654321#",15
2017/03/30 09:52:39.514 < OK
2017/03/30 09:52:39.633 < +CUSD: 4
2017/03/30 09:52:44.542 > AT+CMGL=4
2017/03/30 09:52:44.586 < OK

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