Hi all, I am working on 1.10.5 (today's build) with proxy_media=true configuration set in dialplan config. Around 2-3% of total call attempts are CANCELed with "INCOMPATIBLE_DESTINATION" / "AUDIO RTP REPORTS ERROR: [Missing local host]" notification. I assume that the problem is probably closely connected with codec negotiation, but in my case (proxy_media=true) FS does forward the packets onward and endpoints must agree on the same codec to accept the call. I have compared all the SIP call flows incoming and outgoing (INVITES, 183) and found no clue. Some of the important log snippets: - the call is CANCELed once FS receives 183 and gets first early media packets 8b93b671-b90e-4a0e-aa73-6510a8b9caaf 2020-11-06 19:58:36.832494 [INFO] switch_ivr_originate.c:3801 Sending early media 8b93b671-b90e-4a0e-aa73-6510a8b9caaf 2020-11-06 19:58:36.832494 [DEBUG] switch_core_media.c:8729 PROXY AUDIO RTP [sofia/outside_1/ 4916222112233@10.20.30.20] 10.20.30.6:26502->10.20.30.6:26502 codec: 18 ms: 20 8b93b671-b90e-4a0e-aa73-6510a8b9caaf 2020-11-06 19:58:36.832494 [ERR] switch_core_media.c:9669 AUDIO RTP REPORTS ERROR: [Missing local host] 8b93b671-b90e-4a0e-aa73-6510a8b9caaf 2020-11-06 19:58:36.832494 [NOTICE] switch_core_media.c:9670 Hangup sofia/outside_1/4916222112233@10.20.30.20 [CS_EXECUTE] [INCOMPATIBLE_DESTINATION] a0f2b4f7-8ecd-435d-b66e-444e4d2c65e6 2020-11-06 19:58:36.832494 [DEBUG] switch_ivr_originate.c:3808 sofia/outside_1/4916222112233@10.20.30.20 Media Establishment Failed. a0f2b4f7-8ecd-435d-b66e-444e4d2c65e6 2020-11-06 19:58:36.832494 [NOTICE] switch_ivr_originate.c:3810 Hangup sofia/outside_1/3144917111223344 [CS_CONSUME_MEDIA] [INCOMPATIBLE_DESTINATION] 8b93b671-b90e-4a0e-aa73-6510a8b9caaf 2020-11-06 19:58:36.832494 [DEBUG] switch_ivr_originate.c:3995 Originate Resulted in Error Cause: 88 [INCOMPATIBLE_DESTINATION] a0f2b4f7-8ecd-435d-b66e-444e4d2c65e6 2020-11-06 19:58:36.832494 [DEBUG] switch_channel.c:3565 (sofia/outside_1/3144917111223344) Callstate Change DOWN -> EARLY a0f2b4f7-8ecd-435d-b66e-444e4d2c65e6 2020-11-06 19:58:36.832494 [DEBUG] sofia.c:7339 sofia/outside_1/3144917111223344 skip receive message [PROGRESS_EVENT] (channel is hungup already) 8b93b671-b90e-4a0e-aa73-6510a8b9caaf 2020-11-06 19:58:36.832494 [INFO] mod_dptools.c:3631 Originate Failed. Cause: INCOMPATIBLE_DESTINATION a0f2b4f7-8ecd-435d-b66e-444e4d2c65e6 2020-11-06 19:58:36.832494 [DEBUG] switch_core_media.c:12291 sofia/outside_1/3144917111223344 too late. - incoming (Originator -> FS) SIP INVITE has following SDP v=0 o=- 1604689110 1604689110 IN IP4 10.20.30.6 s=- c=IN IP4 10.20.30.6 t=0 0 m=audio 26502 RTP/AVP 18 0 8 101 a=rtpmap:18 G729/8000 a=fmtp:18 annexb=no a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 a=ptime:20 a=sendrecv a=silenceSupp:off - - - - - outgoing (FS -> Terminator) SDP of SIP INVITE looks like this (codec transparent) v=0 o=FreeSWITCH 4241000132 4241000133 IN IP4 10.20.30.20 s=FreeSWITCH c=IN IP4 10.20.30.20 t=0 0 m=audio 31034 RTP/AVP 18 0 8 101 a=rtpmap:18 G729/8000 a=fmtp:18 annexb=no a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 a=ptime:20 a=silenceSupp:off - - - - - 183 that is received (Terminator -> FS) v=0 o=JOANO_SDP 24930105 0 IN IP4 10.20.30.40 s=JOANO-SIP c=IN IP4 79.133.196.167 t=0 0 m=audio 18200 RTP/AVP 8 101 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 a=silenceSupp:off - - - - a=ptime:20 As a result FS tears down the call attempt by sending (FS -> Originator) SIP/2.0 488 Not Acceptable Here Via: SIP/2.0/UDP 10.20.30.10:5060 ;received=10.20.30.10;rport=5060;branch=z9hG4bK0609c6993b9c-30-16a290 Via: SIP/2.0/UDP 10.20.30.2:5060;branch=z9hG4bK5765.136934e2.0 Max-Forwards: 66 From: <sip:4916222112233@10.20.30.5:5061;user=phone>;tag=b6b8aec94s To: <sip:3144917111223344@10.20.30.20;user=phone>;tag=DcUe4343Uvj8Q Call-ID: 684d5998-d859dd12-ca30a685-551b1244 CSeq: 1 INVITE User-Agent: FreeSWITCH-mod_sofia/1.10.5-release~64bit Accept: application/sdp Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY Supported: timer, path, replaces Allow-Events: talk, hold, conference, refer Reason: Q.850;cause=88;text="INCOMPATIBLE_DESTINATION" Content-Length: 0 and CANCEL (FS -> Terminator) CANCEL sip:3144917111223344@10.20.30.30:5060 SIP/2.0 Via: SIP/2.0/UDP 10.20.30.20:5080;rport;branch=z9hG4bKK01B9mcmpp5jS Max-Forwards: 70 From: <sip:4916222112233@10.20.30.20>;tag=g76r9mQeKQN0a To: <sip:3144917111223344@10.20.30.30:5060> Call-ID: e788fdfd-9b04-1239-6881-fc15b4264fc0 CSeq: 27790763 CANCEL Reason: Q.850;cause=88;text="INCOMPATIBLE_DESTINATION" Content-Length: 0 Could somebody help me to address the issue I am struggling with ? Detailed debugging logs and sip signalization might be found here: https://pastebin.com/G0sjGiw8 - FS logs https://pastebin.com/2Zt6r2mF - SIP logs Many thanks in advance, Maciej