My configuration is Asterisk 11 + OpenVox D230E E1 card + UniMRCP + Speech recognition server.
I implemented voice barge-in during IVR playng promt ( it stops and start recognize ).
Everything working perfectly when I call from SIP phones locally connected.
When I call from analog phones from PSTN via E1 trunk I can see that speech recognition server gets its prompt. So it stops and start recognize self
I suspect echo on analog-digital conversion for such calls.
I switch on oslec echocancelation alghoritm in DAHDI config for this trunk but nothing changed.
I don't know what to do to fix that.
Any recomendations would be appreciated!