[Freeswitch-users] question on att_xfer

hi, during a call made with att_xfer, you can resume the user A on ring? Let me explain better, with bind_meta_app and att_xfer can do this: during a bridge if B dials *1 (for example), A is parked and B can call C. After C to answer, B can to dial # and return in conversation with A. B could resume A while is calling C (for example because I noticed that I've dialed an incorrect number)? I tried with execute_on_ring, but without result. Any ideas? Thank you and good job to all. -- Rocco Lucente