D-Link DWR-961 - Ussd

58D-Link DWR-961 User Manual
Section 3 - Conguration
USSD
Unstructured Supplementary Service Data (USSD) allows ISP-specic applications to be activated with an SMS message.
Send USSD
USSD CMD Enter an application activation code and click Send. This will
allow you to activate applications by sending an SMS to your ISP.