|------------------ Trying -------------->|
|----------- 200 OK (SDP recvonly)---------->|
|<------------------ ACK -----------------|
<<<<<<<<<<<<<<<<< ALL GOOD >>>>>>>>>>>>>>>>>>>
|<------------ INVITE (no SDP) --------------|
|------------------ Trying -------------->|
|----------- 200 OK (SDP sendrcv) ---------->|
|<----------- ACK (SDP sendrcv) -----------|
But freeSWITCH never starts sending RTP after the UNHOLD... Don't know why.