The script prints all status with puts, but for some reason when the debugs above are enabled, some output is missing. So you did not see ls_054 for transfer failure. To see it, enable "debug voice application script" only.
Below the simplest script that reproduces the problem. Destination is supposed to be an FXS port. As soon the call is answered, a blind transfer is attempted to the number configured with param xferTo. When it fails, leg are re-conferenced but there is one way audio because the remote gateway is still place in recvonly mode.
proc setup {} {leg setup [infotag get leg_dnis] callInfo leg_incoming}
proc iSetupDone {} { connection destroy con_all }
proc destroyDone {} {
set callInfo(mode) redirect
leg setup [infotag get cfg_avpair xferTo] callInfo leg_incoming
}
proc xSetupDone {} {
puts -nonewline "[infotag get evt_status]"
if {[infotag get evt_status] != "ls_041"} {connection create leg_incoming leg_outgoing}
}
proc disc {} {call close}
set fsm(I,ev_setup_indication) {setup same_state}
set fsm(I,ev_setup_done) {iSetupDone I}
set fsm(I,ev_destroy_done) {destroyDone X}
set fsm(X,ev_setup_done) {xSetupDone same_state}
set fsm(any_state,ev_disconnected) {disc same_state}
fsm define fsm I
