DTMF during Attended transfer

Hi all,
here is my problem:

A calls B
B press *1 (dtmf code for atx trasnfer) and tries to call C

  • is there a way for B to re-get A before atx-timeout occurs?
  • if not, is it possible to implement a custom dtmf for B to hangup the trasnfer to C and therefore re-talk to A?


it seems that asterisk 12 implements a dtmf called atxferabort that does the trick.

btw specifying it in features.conf causes asterisk to ignore the file.
you have to add it to your dialplan with something like
extens => 123,n,set(FEATURE(atxferabort)=*55)

does anyone know anything about that?