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GSM 09.02 - Version 5.3.0 - Digital cellular telecommunications - ETSI

GSM 09.02 - Version 5.3.0 - Digital cellular telecommunications - ETSI

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User error<br />

Page 139<br />

<strong>GSM</strong> <strong>09.02</strong> version <strong>5.3.0</strong>: August 1996<br />

This parameter is sent by the responder upon unsuccessful outcome of the service, and then takes one of<br />

the following values defined in subclause 5.6.1:<br />

- System failure;<br />

- Data missing;<br />

- Unexpected data value;<br />

This error is returned by the responder if it is not able to deal with the contents of the USSD string.<br />

- Absent Subscriber;<br />

- Illegal Subscriber;<br />

This error indicates that delivery of the unstructured supplementary service data failed because the<br />

mobile station failed authentication.<br />

- Illegal Equipment;<br />

- USSD Busy;<br />

- Unknown Alphabet.<br />

Provider error<br />

See subclause 5.6.1 for the use of this parameter.

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