Hello, LetMeKnow schrieb: > Hello jens, > > > OpenSER is pure signaling to end to ends, > Can you see any T.38 header in SDP session in Linksys ATA , in invite > method > Yes, I see the T.38 header and also the Linksys starts the T.38 transmission to RTPproxy, but the proxy don't sent it to T.38-GW.