Hi all, I'm wondering what influences Freeswitch's signalling response when it responds to an INVITE. In some instances it appears to follow this sequence: Peer -> INVITE (SDP) -> FS Peer <- 100 <- FS Peer <- 183 (SDP) <- FS Peer <- 200 (SDP) <- FS Peer -> ACK -> FS Which leads to a successful bridge between two legs. But in other instances it appears to follow the sequence: Peer -> INVITE (SDP) -> FS Peer <- 100 <- FS Peer <- 180 (SDP) <- FS Peer <- 200 (SDP) <- FS (1st attempt) Peer <- 200 (SDP) <- FS (2nd attempt) .... Peer <- 200 (SDP) <- FS (nth attempt) ....timeout I'm not 100% sure whether the remote peer (itself a SIP trunk) doesn't like the 100/180/200 sequence (as opposed to 100/183/200), so I need to find that out for myself. But I am wondering what factors influence Freeswitch's decision of what sequence signals to send in response to an INVITE. Any pointers appreciated, Ben