[SIPForum-discussion] Issue to use Tag

[Santosh Iyer]

>From a system perspective from-tag, to-tag and call-id define a unique dialog. Please refer to RFC 3261 section 12 "Dialogs". Pasted excerpt of the same
A dialog is identified at each UA with a dialog ID, which consists of
   a Call-ID value, a local tag and a remote tag.  The dialog ID at each
   UA involved in the dialog is not the same.  Specifically, the local
   tag at one UA is identical to the remote tag at the peer UA.  The
   tags are opaque tokens that facilitate the generation of unique
   dialog IDs.
Santosh
--- On Wed, 9/26/12, Kareena K <kareenaf1 at gmail.com> wrote:

From: Kareena K <kareenaf1 at gmail.com>
Subject: [SIPForum-discussion] Issue to use Tag
To: discussion at sipforum.org
Date: Wednesday, September 26, 2012, 11:58 AM

Hi all,
why tag(i.e to-tag and from-tag) had been used if we can identity the call by using Call-id.



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