Hi, I'm using OsmoMGW version 1.9.0.20.069dd.202204110026 and OsmoHNBGW version 1.2.1.13.be9e.202204110026. Call is established, but is silent. The connection is up,but only data flowing one way: OsmoMGW# show mgcp endpoint rtpbridge/1@mgw Virtual trunk 0 endpoint rtpbridge/1@mgw: Availability: available CONN: (1701/rtp, id:0x49AD9023, ip:10.40.16.36, rtp:19856 rtcp:19857) Packets Sent: 0 (0 bytes total) Packets Received: 0 (0 bytes total) Timestamp Errs: 0->0 Dropped Packets: 0 Payload Type: 96 Rate: 16000 Channels: 1 Frame Duration: 20 Frame Denominator: 1000 FPP: 0 Packet Duration: 20 FMTP-Extra: (null) Audio-Name: VND.3GPP.IUFP/16000 Sub-Type: VND.3GPP.IUFP Output-Enabled: 1 Force-PTIME: 0 CONN: (1701/rtp, id:0x5AFEDEF8, ip:10.103.36.93, rtp:55078 rtcp:55079) Packets Sent: 918 (15606 bytes total) Packets Received: 1118 (34350 bytes total) Timestamp Errs: 0->0 Dropped Packets: 0 Payload Type: 96 Rate: 16000 Channels: 1 Frame Duration: 20 Frame Denominator: 1000 FPP: 0 Packet Duration: 20 FMTP-Extra: (null) Audio-Name: VND.3GPP.IUFP/16000 Sub-Type: VND.3GPP.IUFP Output-Enabled: 1 Force-PTIME: 0 OsmoMGW# And I can ping 10.40.16.36 with source 10.40.50.67. But there seems to be aproblem with RTP initialization on link towards core ( Ericsson MGW ) <0012> mgcp_protocol.c:855 endpoint:rtpbridge/1@mgw CRCX: creating new connection ... <0012> mgcp_protocol.c:165 endpoint:rtpbridge/1@mgw RTP-setup: Endpoint is in loopback mode, stopping here! <0012> mgcp_protocol.c:1091 endpoint:rtpbridge/1@mgw CI:C6A09234 CRCX: connection successfully created <0012> mgcp_protocol.c:1124 endpoint:rtpbridge/1@mgw MDCX: modifying existing connection ... <0012> mgcp_sdp.c:436 endpoint:rtpbridge/1@mgw CI:C6A09234 Got media info via SDP: port:55076, addr:10.103.36.93, duration:20, payload-types:96=VND.3GPP.IUFP <0000> mgcp_iuup.c:705 (rtpbridge/1@mgw I:C6A09234) No RFCI NO_DATA found, unable to send dummy packet <0012> mgcp_protocol.c:1312 endpoint:rtpbridge/1@mgw CI:C6A09234 MDCX: connection successfully modified <0012> mgcp_protocol.c:855 endpoint:rtpbridge/1@mgw CRCX: creating new connection ... <0012> mgcp_sdp.c:436 endpoint:rtpbridge/1@mgw CI:E7B356C6 Got media info via SDP: port:19008, addr:10.40.16.36, duration:20, payload-types:96=VND.3GPP.IUFP <0000> mgcp_iuup.c:705 (rtpbridge/1@mgw I:E7B356C6) No RFCI NO_DATA found, unable to send dummy packet <0012> mgcp_protocol.c:1091 endpoint:rtpbridge/1@mgw CI:E7B356C6 CRCX: connection successfully created <0019> iuup.c:537 IuUP(C6A09234)[0x562a59d9c600]{Initialisation}: Initialization: Unexpected RFCI 1 at position 0 received <0019> iuup.c:612 IuUP(C6A09234)[0x562a59d9c600]{Initialisation}: Tx Initialization NACK cause=19 orig_message=e0 00 dd b4 06 01 51 67 3c 86 27 00 00 00 01 00 <0019> iuup.c:537 IuUP(C6A09234)[0x562a59d9c600]{Initialisation}: Initialization: Unexpected RFCI 1 at position 0 received <0019> iuup.c:612 IuUP(C6A09234)[0x562a59d9c600]{Initialisation}: Tx Initialization NACK cause=19 orig_message=e0 00 dd b4 06 01 51 67 3c 86 27 00 00 00 01 00 <0019> iuup.c:537 IuUP(C6A09234)[0x562a59d9c600]{Initialisation}: Initialization: Unexpected RFCI 1 at position 0 received < . . . <0019> iuup.c:537 IuUP(C6A09234)[0x562a59d9c600]{Initialisation}: Initialization: Unexpected RFCI 1 at position 0 received <0019> iuup.c:612 IuUP(C6A09234)[0x562a59d9c600]{Initialisation}: Tx Initialization NACK cause=19 orig_message=e0 00 dd b4 06 01 51 67 3c 86 27 00 00 00 01 00 <0019> iuup.c:537 IuUP(C6A09234)[0x562a59d9c600]{Initialisation}: Initialization: Unexpected RFCI 1 at position 0 received <0019> iuup.c:612 IuUP(C6A09234)[0x562a59d9c600]{Initialisation}: Tx Initialization NACK cause=19 orig_message=e0 00 dd b4 06 01 51 67 3c 86 27 00 00 00 01 00 <0019> iuup.c:537 IuUP(C6A09234)[0x562a59d9c600]{Initialisation}: Initialization: Unexpected RFCI 1 at position 0 received <0019> iuup.c:612 IuUP(C6A09234)[0x562a59d9c600]{Initialisation}: Tx Initialization NACK cause=19 orig_message=e0 00 dd b4 06 01 51 67 3c 86 27 00 00 00 01 00 <0019> iuup.c:537 IuUP(C6A09234)[0x562a59d9c600]{Initialisation}: Initialization: Unexpected RFCI 1 at position 0 received <0019> iuup.c:612 IuUP(C6A09234)[0x562a59d9c600]{Initialisation}: Tx Initialization NACK cause=19 orig_message=e0 00 dd b4 06 01 51 67 3c 86 27 00 00 00 01 00 <0019> iuup.c:895 IuUP(C6A09234)[0x562a59d9c600]{Initialisation}: Event IuUP-DATA-ind not permitted <0000> mgcp_iuup.c:189 (rtpbridge/1@mgw I:C6A09234) Failed passing IuUP-Init to IuUP layer <0019> iuup.c:537 IuUP(C6A09234)[0x562a59d9c600]{Initialisation}: Initialization: Unexpected RFCI 1 at position 0 received <0019> iuup.c:612 IuUP(C6A09234)[0x562a59d9c600]{Initialisation}: Tx Initialization NACK cause=19 orig_message=e0 00 dd b4 06 01 51 67 3c 86 27 00 00 00 01 00 <00 Configs: ! MGW mgcp domain mgw local ip 10.40.50.67 bind ip 10.40.50.67 bind port 2427 rtp port-range 4002 16001 no rtp ip-probing rtp ip-dscp 0 rtp keep-alive once no rtcp-omit no rtp-patch sdp audio-payload send-ptime sdp audio-payload send-name number endpoints 15 allow-transcoding osmux off end !HnbGW cs7 instance 0 network-indicator national point-code 0.69.4 sccp-address msc routing-indicator PC point-code 0.27.4 sccp-address sgsn routing-indicator PC point-code 0.113.6 hnbgw log-prefix hnb-id iuh local-ip 10.40.50.69 iucs remote-addr msc iups remote-addr sgsn mgcp mgw remote-ip 10.40.50.67 mgw remote-port 2427 mgw reset-endpoint rtpbridge/* end Best Regards Sjur Thomas Lien Systems engineer Roaming & Network access Telenor Maritime +47 91602376 Kystveien 2D N-4841 Arendal, Norway www.telenormaritime.com<http://www.telenormaritime.com/> LinkedIn<https://www.linkedin.com/company/telenor-maritime/> [/Users/rinomartinsen/Dropbox (ANTI)/Telenor/2_Projects/TNO036_digitizing and renewal of the telenor identity/FINAL/Toolkit/Logo/Symbol/RGB/pdf/telenor_symbol_blue.pdf] Internal