[SIPForum-discussion] Cancel transaction

[Dileep Ravindran]

Thanks all for the clarification on PRACK
If every request is a new transaction then i see that CANCEL has the same braNch parameter as INVITE ..... then is CANCEL a new transaction? if yes how do we differ it as a new transaction??


Thanks
Dileep
  ----- Original Message ----- 
  From: Vijay Tiwari 
  To: Dileep Ravindran 
  Cc: discussion at sipforum.org 
  Sent: Tuesday, May 18, 2010 1:20 PM
  Subject: Re: [SIPForum-discussion] Prack


  Yes, PRACK will be a new transaction and it will be identity by Vai branch parameter. please find the below logs for the same


   SIP/2.0 183 Session Progress
  Via: SIP/2.0/UDP 8.19.19.06:5060;branch=z9hG4bK4545
  From: <sip:filo.farnsworth at television.tv>;tag=12
  To: <+12025551313 at gw.carrier.com;user=phone>;tag=37 
  Call-ID: 49235243082018498 at television.tv
  CSeq: 1 INVITE
  RSeq: 08071
  Contact: <sip:50.60.70.80>
  Content-Type: application/sdp
  Content-Length: 139
  v=0
  o=Port1723 2890844535 2890844535 IN IP4 50.60.70.80
  s=-
  t=0 0
  c=IN IP4 50.60.70.80
  m=audio 62002 RTP/AVP 0
  a=rtpmap:0 PCMU/8000


   

   PRACK sip:50.60.70.80 SIP/2.0
  Via: SIP/2.0/UDP 8.19.19.06:5060;branch=z9hG4bK454
  Max-Forwards: 70
  From: <sip:filo.farnsworth at television.tv>;tag=37
  To: <sip:+12025551313 at gw.carrier.com;user=phone>;tag=12
  Call-ID: 49235243082018498 at television.tv
  CSeq: 2 PRACK
  Contact: sip:filo.farnsworth at studio.television.tv
  RAck: 08071 1 INVITE
  Content-Length: 0

  both Branch id are different


  thanks
  vijay

  On Fri, May 14, 2010 at 10:27 AM, Dileep Ravindran <dileepravindran at tataelxsi.co.in> wrote:

    Hi All,

       Can anyone please tell whether  PRACK  a new transaction?? and if yes which  parameter that tells that its a new transaction??
    \Thanks
    Dileep

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