FreeSWITCH Proxy sip:1003 sip:1003 + + + + | Invite | | | |---------------->| | | | | Invite | | | |+----------------> | | | | | Invite | | |+------------------|----------------->| | | | | | | 180 with 100rel| | | 180 with 100rel|<-----------------+| | |<---------------+| | | | | | | | PRACK | | | |+--------------> | | | | | PRACK | | | | +---------------> | | | 200 OK PRACK | 200 OK PRACK | | | <--------------+| <----------------+| | | | | | | | 180 without 100rel | | <-----------------------------------------------------+| | | | | | | 200 OK to INVITE | | |<----------------|-------------------|-----------------+| | | | | | Orphan 200 Ok send ACK&BYE | | | | | | | + + | + +