[SIPForum-discussion] SIP Transaction Layer

[banu Priya K]

Ok as you say it realiable transport ensures delivery of messages to other
end, then why should we start timer B?
  -----Original Message-----
  From: gaurav katiyar [mailto:gaurav_katiyar at yahoo.com]
  Sent: Thursday, May 08, 2008 11:23 AM
  To: banupriya at tataelxsi.co.in; discussion at sipforum.org
  Subject: Re: [SIPForum-discussion] SIP Transaction Layer


  Hi Banu,
      In case of un-reliable transport, as you know that there are chances
of dropping sip message on network. Because of that SIP ensures that if a
UAC won't get response in a certain period of time it would retransmit the
message. Because transport is not ensuring the packet delivery so SIP takes
this responsibility and ensures deliver a message on other end. But in case
of reliable transport, transport ensures delivery of sip message on other
end and takes care of any data loss. So there is no need to start timer to
re-transmit data as it is ensured by transport layer.

  is what i understand.

  Gaurav


  banu Priya K <banupriya at tataelxsi.co.in> wrote:
    Hi,

    In case of reliable transport, why timer A is not set to fire.. i.e
    retransmission timer,
    Only timer B is set.

    Regds,
    Banupriya K


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  Gaurav Katiyar | Lead - Engineering | GlobalLogic Inc.
  The Global Product Development Leader


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