Hello, I have a strange phenomenon with a phone (snomM700 DECT) behind NAT: * phone 43 is ringing (local IP is 192.168.0.56, remote IP is 195.71.aaa.bbb (anonymized) * phone 43 is answering the call * we immediately get [USER_NOT_REGISTERED] Register string is as follows <sip:43@192.168.0.56:1506 0;line=7045;fs_nat=yes;fs_path=sip:43@195.71.aaa.bbb:5060;line=7045> Here is the Freeswitch log starting with phone's SDP: 3c74476e-1ce3-46d0-874d-e75bbebce8ce 2015-11-19 15:46:38.585575 [DEBUG] sofia.c:6760 Remote SDP: 3c74476e-1ce3-46d0-874d-e75bbebce8ce v=0 3c74476e-1ce3-46d0-874d-e75bbebce8ce o=43 4408 4408 IN IP4 195.71.aaa.bbb 3c74476e-1ce3-46d0-874d-e75bbebce8ce s=- 3c74476e-1ce3-46d0-874d-e75bbebce8ce c=IN IP4 195.71.aaa.bbb 3c74476e-1ce3-46d0-874d-e75bbebce8ce t=0 0 3c74476e-1ce3-46d0-874d-e75bbebce8ce a=sendrecv 3c74476e-1ce3-46d0-874d-e75bbebce8ce m=audio 50030 RTP/AVP 8 3c74476e-1ce3-46d0-874d-e75bbebce8ce a=rtpmap:8 PCMA/8000 3c74476e-1ce3-46d0-874d-e75bbebce8ce a=ptime:20 3c74476e-1ce3-46d0-874d-e75bbebce8ce a=maxptime:80 3c74476e-1ce3-46d0-874d-e75bbebce8ce a=rtcp:50031 3c74476e-1ce3-46d0-874d-e75bbebce8ce 3c74476e-1ce3-46d0-874d-e75bbebce8ce 2015-11-19 15:46:38.585575 [DEBUG] sofia.c:6750 Channel sofia/internal/43@192.168.0.56:15060 entering state [ready][200] 3c74476e-1ce3-46d0-874d-e75bbebce8ce 2015-11-19 15:46:38.585575 [DEBUG] switch_core_media.c:4150 Audio Codec Compare [PCMA:8:8000:20:64000:1]/[PCMA:8:8000:20:64000:1] 3c74476e-1ce3-46d0-874d-e75bbebce8ce 2015-11-19 15:46:38.585575 [DEBUG] switch_core_media.c:4205 Audio Codec Compare [PCMA:8:8000:20:64000:1] ++++ is saved as a match 3c74476e-1ce3-46d0-874d-e75bbebce8ce 2015-11-19 15:46:38.585575 [DEBUG] switch_core_media.c:4150 Audio Codec Compare [PCMA:8:8000:20:64000:1]/[PCMU:0:8000:20:64000:1] 3c74476e-1ce3-46d0-874d-e75bbebce8ce 2015-11-19 15:46:38.585575 [DEBUG] switch_core_media.c:4150 Audio Codec Compare [PCMA:8:8000:20:64000:1]/[SPEEX:99:8000:20:24600:1] 3c74476e-1ce3-46d0-874d-e75bbebce8ce 2015-11-19 15:46:38.585575 [DEBUG] switch_core_media.c:4150 Audio Codec Compare [PCMA:8:8000:20:64000:1]/[GSM:3:8000:20:13200:1] 3c74476e-1ce3-46d0-874d-e75bbebce8ce 2015-11-19 15:46:38.585575 [DEBUG] switch_core_media.c:4150 Audio Codec Compare [PCMA:8:8000:20:64000:1]/[G729:18:8000:20:8000:1] 3c74476e-1ce3-46d0-874d-e75bbebce8ce 2015-11-19 15:46:38.585575 [DEBUG] switch_core_media.c:2897 Set Codec sofia/internal/43@192.168.0.56:15060 PCMA/8000 20 ms 160 samples 64000 bits 1 channels 3c74476e-1ce3-46d0-874d-e75bbebce8ce 2015-11-19 15:46:38.585575 [DEBUG] switch_core_codec.c:111 sofia/internal/43@192.168.0.56:15060 Original read codec set to PCMA:8 3c74476e-1ce3-46d0-874d-e75bbebce8ce 2015-11-19 15:46:38.585575 [DEBUG] switch_core_media.c:4472 No 2833 in SDP. Disable 2833 dtmf and switch to INFO 3c74476e-1ce3-46d0-874d-e75bbebce8ce 2015-11-19 15:46:38.585575 [DEBUG] switch_core_media.c:6019 AUDIO RTP [sofia/internal/43@192.168.0.56:15060] 144.76.47.185 port 12664 -> 195.71.aaa.bbb port 50030 codec: 8 ms: 20 3c74476e-1ce3-46d0-874d-e75bbebce8ce 2015-11-19 15:46:38.585575 [DEBUG] switch_rtp.c:3753 Starting timer [soft] 160 bytes per 20ms 3c74476e-1ce3-46d0-874d-e75bbebce8ce 2015-11-19 15:46:38.585575 [DEBUG] switch_core_media.c:6237 Activating RTCP PORT 50031 3c74476e-1ce3-46d0-874d-e75bbebce8ce 2015-11-19 15:46:38.585575 [DEBUG] switch_rtp.c:4132 RTCP send rate is: 5000 and packet rate is: 20000 Remote Port: 50031 3c74476e-1ce3-46d0-874d-e75bbebce8ce 2015-11-19 15:46:38.585575 [DEBUG] switch_rtp.c:2443 Setting RTCP remote addr to 195.71.aaa.bbb:50031 2 3c74476e-1ce3-46d0-874d-e75bbebce8ce 2015-11-19 15:46:38.585575 [DEBUG] switch_core_media.c:6348 sofia/internal/43@192.168.0.56:15060 Set rtp dtmf delay to 40 3c74476e-1ce3-46d0-874d-e75bbebce8ce 2015-11-19 15:46:38.585575 [NOTICE] sofia.c:7714 Channel [sofia/internal/43@192.168.0.56:15060] has been answered 3c74476e-1ce3-46d0-874d-e75bbebce8ce 2015-11-19 15:46:38.605579 [DEBUG] switch_channel.c:3757 (sofia/internal/43@192.168.0.56:15060) Callstate Change RINGING -> ACTIVE 3c74476e-1ce3-46d0-874d-e75bbebce8ce 2015-11-19 15:46:38.625571 [NOTICE] switch_ivr_bridge.c:1416 Hangup sofia/internal/43@192.168.0.56:15060 [CS_CONSUME_MEDIA] [USER_NOT_REGISTERED] 3c74476e-1ce3-46d0-874d-e75bbebce8ce 2015-11-19 15:46:38.625571 [DEBUG] switch_ivr_bridge.c:1689 sofia/internal/43@192.168.0.56:15060 skip receive message [UNBRIDGE] (channel is hungup already) Anybody has a clue where this may come from? Freeswitch is rather new (from 03-Nov-2015). -- With kind regards Peter Steinbach Telefaks Services GmbH mailto:lists (att) telefaks.de Internet: www.telefaks.de