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/>
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renewal of the telenor 
identity/FINAL/Toolkit/Logo/Symbol/RGB/pdf/telenor_symbol_blue.pdf]



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