Hi All,

I'm facing a strange behaviour in FS after a Attended Transfer.

For the A leg listen the C leg, C needs to press some DTMF key. Otherwise only C leg can listen A leg.

My scenario is:

A (external) ---> TDM/SIP Gateway ---> FS ---> B (extension) ---> Attended Transfer ---> C (extension).

Both extensions are SIP Phones registered in FS.

If the transfer is Blind, the audio works fine.

Other test: If the A leg is also a local extension, the audio on Attended Transfer works fine too.

An important point is that all transfers are made pressing "Flash" key in SIP Phone not by att_xfer in Dialplan.

So, any clue to start?

Thank you,

Alex.