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Reply To: SDCCH & TCH



During a call the SDCCH is not used : it was released at the end of the call setup.

If a call is originated while a SMS is being sent, then, as far as i know, the sending of the SMS will have to finish being transmitted first, then this SDCCH will be released, and then a new SDCCH will be requested in order to perform the call setup.

The first (SMS) SDCCH was established in order to perform a SMS transmission and only that. It cannot be re-used to perform a call setup.

I hope i got your question right…