[SIPForum-discussion] 488 Not Acceptable Here

[Rico S. Salgado]

Hello Guys,

Just like to ask your assistance in analyzing an issue we're encountering.
We are receiving a 488 error when making a call from point B to point A.
However calls from point A to point B are working.  

I read it maybe about the supported codec but I'm not sure how to verify
this.  Below is a sample logs trace:

--------------------------------------------------------------------------

     INVITE sip:<USER1>@<POINT.A.IP>:5060 SIP/2.0 
     Via: SIP/2.0/UDP
<POINT.B.IP>:5060;rport;branch=z9hG4bK-10e8-1244098095-4944-202 
     Call-ID: 62f2-437-54200964815-aicent1-0-<POINT.B.IP>
     CSeq: 1 INVITE 
     Max-Forwards: 70 
     To: <sip:<USER1>@<POINT.A.IP>:5060> 
     From:
"emma"<sip:<USER2>@<POINT.B.IP>>;tag=95ffcd055e0f78f7d5d397020e89288d5d1a25a
8 
     User-Agent: Dialogic-SIP/X.X.X.X aicent1 0 
     Contact: <sip:<USER2>@<POINT.B.IP>:5060> 
     Allow: INVITE, BYE, REGISTER, ACK, OPTIONS, CANCEL, SUBS CRIBE, NOTIFY,
INFO, REFER, UPDATE 
     Supported: path, replaces, timer, tdialog 
     Session-Expires: 1800 
     Expires: 300 
     Organization: Dialogic 
     Content-Length: 467 
     Content-Type: multipart/mixed;boundary=ub-dialogic-sw-1
     MIME-Version: 1.0 
                        
          --ub-dialogic-sw-1 
          Content-Type: application/sdp 
          
          v=0 
          o=Dialogic_SDP 0 0 IN IP4 <POINT.B.IP> 
          s=Dialogic-SIP 
          c=IN IP4 X.X.X.X 
          t=0 0 
          m=audio 8220 RTP/AVP 18 0 8 
          a=rtpmap:0 PCMU/8000 
          a=rtpmap:8 PCMA/8000 
          a=rtpmap:18 G729/8000 
          a=fmtp:18 annexb=no 
          a=silenceSupp:off - - - - 
          
          --ub-dialogic-sw-1 
          Content-Type: application/ISUP; version=ITU-93 
          Content-Disposition: signal;handling=optional 
          
          01 00 08 00 0a 02 02 09 07 03 10 19 99 01 10 43 0a 09 83
          10 68 31 19 32 54 76 08 00  
                        
          --ub-dialogic-sw-1-- 
                       

---> [<POINT.A.IP>, 5060 -> <POINT.B.IP>, 5060]
      SIP/2.0 100 Trying 
      From: "emma"<sip:<USER2>@<POINT.B.IP>>;tag=95f
      fcd055e0f78f7d5d397020e89288d5d1a25a8 
      To: <sip:<USER1>@<POINT.A.IP>:5060>;tag=f0442598156200964144815 
      Call-ID: 62f2-437-54200964815-aicent1-0-<POINT.B.IP>
      CSeq: 1 INVITE 
      Allow: ACK,BYE,CANCEL,INVITE,OPTIONS,INFO,SUBSCRIBE,REFER,NOTIFY,PRACK

      Via: SIP/2.0/UDP <POINT.B.IP>:5060;rport=5060;branch=
z9hG4bK-10e8-1244098095-4944-202 
      Contact: <sip:<POINT.A.IP>> 
      Content-Length: 0 
                        
                       
---> [<POINT.A.IP>, 5060 -> <POINT.B.IP>, 5060]
      SIP/2.0 488 Not Acceptable Here 
      From:
"emma"<sip:<USER2>@<POINT.B.IP>>;tag=95ffcd055e0f78f7d5d397020e89288d5d1a25a
8 
      To: <sip:<USER1>@<POINT.A.IP>:5060>;tag=f0442598156200964144815 
      Call-ID: 62f2-437-54200964815-aicent1-0-<POINT.B.IP>
      CSeq: 1 INVITE 
      Server: CS2000_NGSS/9.0 
      Supported: 100rel 
      Allow: ACK,BYE,CANCEL,INVITE,OPTIONS,INFO,SUBSCRIBE,REFER,NOTIFY,PRACK

      Via: SIP/2.0/UDP
<POINT.B.IP>:5060;rport=5060;branch=z9hG4bK-10e8-1244098095-4944-202 
      Content-Length: 0

---------------------------------------------------------------------------

Any idea you could share would be highly appreciated.  Thanks.

Regards,
Rico