GSM Codes with Osmocombb

Sylvain Munaut 246tnt at
Sun Jan 9 13:55:23 UTC 2011


> Now I tried to send GSM codes (like *#21#, oder *21*{NUMBER}#) to set and
> unset call diverts. It seems, that "call 1 *21*{NUMBER}#" does not work.
> Normal GSM cellphones seem to handle these codes not as a normal call.

Theses are called USSD and are not implemented in mobile yet

Unstructured Supplementary Service Data (USSD)
GSM 03.90 IIRC.

> Does anybody know how one could send GSM codes to the network?

Read the specs for USSD, implement them and submit the patch :)



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