Ussd development with kannel

[gautam sasikumar]

Hiii,

     I am developing USSD application which is at a basic stage. I was
looking for a patch for USSD in kannel version 1.4.3. I have searched the
whole web but in vain. I have three basic questions.

1> Does Kannel require a patch for implementing ussd??
2> If Kannel does require a patch, then where can i find a patch?
3> What parameters do i have set in kannel to avail ussd facilities.

Thanks and Regards,
Gautam Sasikumar.