[SIPForum-discussion] IP Media 3000 generating BYE message

[Sylvester]

Hi Ashoke,

Please let me know what's the IP address of Media Server. if its .100, why the communication is only 1 way? I dont see an ACK, normally this is what happens when UA & CA talks to MS Via SIP/MGCP

UA                   CA                MS
-------Invite --------- X  
<--- 100 -------------X --------CRCX -->
                         X <------- 200 --
<---------180/200 --------X
<----------------------------------------------->

Even if CA wants to talk to MS, it talks Via RQNT wht ever. Please explain the call flow, I can help you.
Btw, why do you say that Media Server cannot send a BYE (If everything is SIP) ? In you case, looking at the trace, I dont see media Server (if its .100) is getting an ACK, it will time out and drop the call.

Sylvester, 
BLR, IND



From: Ashoke Kumar Ghosh 
Sent: Wednesday, June 11, 2008 7:01 PM
To: kanumuri Sreeram 
Cc: discussion at sipforum.com 
Subject: Re: [SIPForum-discussion] IP Media 3000 generating BYE message


Hi,

Thanks for your reply. I am attaching the ethereal traces again. Please use thereal network analyzer software to open these files.

The call flow mentioned by me in my earlier mail indicates that whenever the dialog is to be terminated, that would be initiated from AS and not from Media Server. Under no circumstance, media server would release the call.

Please help me understand why BYE is being generated by media server.

Best Regards..
 
*******************************************
Ashoke Kumar Ghosh
Mobile : 919324279664
Email: ashoke.k.ghosh at gmail.com
*******************************************

  ----- Original Message ----- 
  From: kanumuri Sreeram 
  To: Ashoke Kumar Ghosh 
  Sent: Tuesday, June 10, 2008 9:36 PM
  Subject: Re: [SIPForum-discussion] IP Media 3000 generating BYE message


  Hi Asjoke,

  can u resent the trace file.
  this is the error I am getting when I am trying t open in wireshark
  he capture file appears to be damaged or corrupt.
  (pcap: File has 92621609-byte packet, bigger than maximum of 65535)

  Also, you mentioned
  >But we are not able to understand why BYE message is being sent my Media Server
  But in the call flow u showed As is senting bye. pl clarify this also.
  ----------------BYE------------------>
  <-------------200 OK----------------

  -Sreeram.

  ----- Original Message ----
  From: Ashoke Kumar Ghosh <ashoke.k.ghosh at gmail.com>
  To: discussion at sipforum.com
  Sent: Tuesday, June 10, 2008 10:16:09 AM
  Subject: [SIPForum-discussion] IP Media 3000 generating BYE message


  Hi Guys,

  I am handling a application server which provides prepaid service. We are using IP Media 3000 for playing announcement and digit collection. The call flow between application server and media server is like this.

  AS                                    MS
  ---------------INVITE----------------->
  <---------100 TRYING--------------
  <-----------200 OK-------------------
  ----------------ACK------------------->
  ----------------INFO------------------>
  <----------200 OK--------------------

  <--------------INFO-------------------
  --------------200 OK---------------->
  ----------------INFO----------------->
  <------------200 OK-----------------

  <--------------INFO-------------------
  ---------------200 OK--------------->
  ----------------BYE------------------>
  <-------------200 OK----------------


  We were trying to divert some TDM network traffic through application server. But got stuck with an issue of call failure. After investigation, we found that on certain occassion, Media Server is sending BYE message at some stages. But we are not able to understand why BYE message is being sent my Media Server. As per the call flow, media server never would generate a BYE message. Moreover, it is sending a 200 OK against the previously sent INFO from AS.

  I am attaching sample trace of a call between the application server and media server. Please note that I could capture only the messages from media server to application server. Can anybody help me understand why this BYE message is being originated. Also I have noticed Cause 318 Q850 being mentioned in all the BYE messages. But I could not find this release cause in Q850. Any idea what is this release cause.


  Best Regards..
   
  *******************************************
  Ashoke Kumar Ghosh
  Mobile : 919324279664
  Email: ashoke.k.ghosh at gmail.com
  *******************************************





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