When originating a call the respective call channel's call state is set to RINGING right after progress 100 is received. Here's the captured flow: |Time | <src ip> | | | | <dst ip> | |2.848 | INVITE SDP (g711A g711U GSM telephone-eventRTP...e-101 CN) |SIP From: "" <sip:endpoint removed To:<sip:endpoint removed | |(5080) ------------------> (5060) | |2.848 | 407 Proxy Authentication Required |SIP Status | |(5080) <------------------ (5060) | |2.849 | ACK | |SIP Request | |(5080) ------------------> (5060) | |2.849 | INVITE SDP (g711A g711U GSM telephone-eventRTP...e-101 CN) |SIP From: "" <sip:endpoint removed To:<sip:endpoint removed | |(5080) ------------------> (5060) | |2.850 | 100 Trying| |SIP Status | |(5080) <------------------ (5060) | |13.444 | 180 Ringing |SIP Status | |(5080) <------------------ (5060) | |13.445 | 183 Session Progress SDP (g711A g711U GSM tele...ne-eventRTPType-101) |SIP Status | |(5080) <------------------ (5060) | |13.445 | RTP (g711A) |RTP Num packets:230 Duration:4.574s SSRC:0x1E777E26 | |(26056) <------------------ (19312) | |13.601 | RTP (g711A) |RTP Num packets:220 Duration:4.419s SSRC:0xA530C519 | |(26056) ------------------> (19312) | After the 100 Trying is received the switch executes switch_channel_perform_set_running_state (switch_channel.c) and the channel call state is set to RINGING and ESL event CHANNEL_CALLSTATE:RINGING is generated. I would expect the channel call state to be set to RINGING only after 180 Ringing is received from the far endpoint. Could anybody give me a hint what could be wrong or what steps to take to figure out? I am already out of ideas. Thanks! Hynek