I have searched widely for this information without success.
I want to get an ATA to place a call to another ATA (both SIP registered), and then have the call go directly between the 2 ATAs.
I have been told to set REINVITE=NO to do this. But I have done that both in Asterisk (I am running Trixbox) and the ATAs (PAP2s and HT386/488s).
I have to two ATAs on the same subnet as the server and a system setup with Ethereal, so I know that the RTP flow remains handled by the server.
What do I need to do this. I cannot afford for 2 remote people to have to route their calls through my server and WAN link.