Hello all,

I am having a situation where 200 OK from a GW arrives at FS and can be seen in FS CLI but no ACK is generated. Here in INVITE and 200 OK packets  I am wondering what are the problematic headers I know contact is messy though. Shouldn't it at least generate an ACK ?.

PUBLIC-IP:5070 =  FS

PUBLIC-IP or PUBLIC-IP:5060 = GW(Kamailio)

-------------------------- INVITE -------From FS to GW--------------------

   INVITE sip:81205999@public.domain.com SIP/2.0

   Via: SIP/2.0/UDP PUBLIC-IP:5070;rport;branch=z9hG4bK4rSU85e8rjj6j

   Max-Forwards: 70

   From: "UserA" <sip:16910067@PUBLIC-IP>;tag=BSNjv3XNrFU1m

   To: <sip:81205999@public.domain.com>

   Call-ID: 8fe2118a-fe89-1233-2781-069be24d4191

   CSeq: 83037069 INVITE

   Contact: <sip:gw+pcall@PUBLIC-IP:5070;transport=udp;gw=pvcall>

   User-Agent: FreeSWITCH-mod_sofia/1.4.23+git~20151023T152155Z~9fcf3e0c9a~64bit

   Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY

   Supported: timer, path, replaces

   Allow-Events: talk, hold, conference, refer

   Content-Type: application/sdp

   Content-Disposition: session

   Content-Length: 303

   X-FS-Support: update_display,send_info

   Remote-Party-ID: "UserA" <sip:16910067@PUBLIC-IP>;party=calling;screen=yes;privacy=off

   v=0

   o=FreeSWITCH 1446729346 1446729347 IN IP4 PUBLIC-IP

   s=FreeSWITCH

   c=IN IP4 PUBLIC-IP

   t=0 0

   m=audio 16920 RTP/AVP 102 0 8 9 101 13

   a=rtpmap:102 SPEEX/16000

   a=rtpmap:0 PCMU/8000

   a=rtpmap:8 PCMA/8000

   a=rtpmap:9 G722/8000

   a=rtpmap:101 telephone-event/8000

   a=fmtp:101 0-16

   a=ptime:20

 ---------------------------------- 200 OK -------From GW to FS----------------------------

    SIP/2.0 200 OK

   Via: SIP/2.0/UDP PUBLIC-IP:5070;received=PUBLIC-IP;rport=5070;branch=z9hG4bK4rSU85e8rjj6j

   To: <sip:81205999@public.domain.com>;tag=shv30apv2f

   From: "UserA" <sip:16910067@PUBLIC-IP>;tag=BSNjv3XNrFU1m

   Call-ID: 8fe2118a-fe89-1233-2781-069be24d4191

   CSeq: 83037069 INVITE

   Contact: <sip:k471p745@v3n0qcki9ah1.invalid;alias=182.178.237.31~20760~6;transport=ws>

   X-Can-Renegotiate: true

   Supported: ice,replaces,outbound

   Content-Type: application/sdp

   Content-Length: 597

   v=0

   o=- 464531514895581299 2 IN IP4 PUBLIC-IP

   s=-

   t=0 0

   a=msid-semantic: WMS QT4IzXsqqeNv2uaXsBBrmLBlUeHKFOYKSRMh

   m=audio 33416 RTP/AVP 0 8 9 101 13

   c=IN IP4 PUBLIC-IP

   a=rtpmap:0 PCMU/8000

   a=rtpmap:8 PCMA/8000

   a=rtpmap:9 G722/8000

   a=rtpmap:101 telephone-event/8000

   a=rtpmap:13 CN/8000

   a=ssrc:4081787962 cname:HWxDJwiTLUiGrbg/

   a=ssrc:4081787962 msid:QT4IzXsqqeNv2uaXsBBrmLBlUeHKFOYKSRMh 3f289eda-ce8d-4219-ac04-1147e6a14fdb

   a=ssrc:4081787962 mslabel:QT4IzXsqqeNv2uaXsBBrmLBlUeHKFOYKSRMh

   a=ssrc:4081787962 label:3f289eda-ce8d-4219-ac04-1147e6a14fdb

   a=sendrecv

   a=rtcp:33417

--

Regards

Salman

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