> so to take complete advantage of sniffing 4 time slots we need to modify
> only a ccch_scan app or some more modification also needed  ??
> and what is someone need to sniff either uplink or downlink??

You need to modify part of the ARM code as well.

There is 4 level of hierarchy: L3, L2, L1 (ARM code), L1 (DSP)

Look at luca's patch, it should be pretty evident what needs to be
done (and if it isn't then you're not familiar with the code enough to
do the modification anyway)

Cheers,

    Sylvain