Mousto, ok for TCH, but the SDCCH is a bit of a mystery.
Optimiser,
as far as i recall (but i might be wrong.. please confirm), the state “BARRED” is transmitted on the BCCH, so the MS would not even camp on this cell. Therefore you are right : a MS should not be able to even request for a connection.
so …
did you activate SDCCH Handover perhaps ?