[Freeswitch-users] att_xfer and blind transfer

Hello, Is there anyway to do blind transfer with att_xfer? Also, based on wiki for att_xfer, to cancel transfer and go back to the caller, you can press # ONLY after C-leg (last party) answers. However, most users would need to be able cancel transfer while the last party is ringing and hasn't answered. Is that possible? Thanks, Ali Pey