[SIPForum-discussion] Difference between DIALOG, SESSION and TRANSACTION

[Lokesh Agrawal]

Hi Abhishek,

Thanks for the response again. Now I am clear about that.

regards
Lokesh



On 8/17/07, mishra.abhishek at wipro.com <mishra.abhishek at wipro.com> wrote:
>
>  Hi Lokesh
>
> Do you wanna say INVITE is creating a dialog in this example or Dialog is
> created after 200 OK response only ??????
>
> <AM>  Dialogs are created through non-failure responses to the requests
> with specific methods Please see Example-2 as well.
>
>   If there is no media exchange there should not be session  Am I right
> ????
>
> <AM> There can be dialogs without sessions
>
> Hope that this helps
>
>
>  thanks & regards
> Abhishek
>
>
> Abhishek Mishra
> Wipro Tech
> Tower-8, 1st Floor, C-wing
> Electronics City Campus
> Bangalore-560100
>
>  ------------------------------
> *From:* Lokesh Agrawal [mailto:lokesh.agrawal at gmail.com]
> *Sent:* Friday, August 17, 2007 6:33 PM
> *To:* Abhishek Mishra (WT01 - TES-Enterprise Networks)
> *Cc:* discussion at sipforum.org
> *Subject:* Re: [SIPForum-discussion] Difference between DIALOG,SESSION and
> TRANSACTION
>
> Hi Abhishek,
>
> Thanks for the response. Now I am clear about transaction. I  have 1 query
> inline regarding Dialog.
>
> On 8/17/07, mishra.abhishek at wipro.com <mishra.abhishek at wipro.com> wrote:
> >
> >  Hi Lokesh,
> >
> > A transaction refers to a fundamental unit of message exchange. It
> > basically includes a request-response cycle.
> >
> >  Dialog represents a peer-to-peer relationship between two user
> > agents.It is usually created through generation of "non-failure"
> > responses to request. e.g.
> >
> >
> > Example-1:
> >
> > UAC                      UAS
> >   ---INVITE (a)--->
> > <--100 Trying (b)-----
> > <---200 OK (c)--------
> >
> > ---ACK (d)--------------->
> >
> >
> > <-----BYE(e)----------------
> > ----200OK (f)------------------>
> >
> > In the example 1, (a) to (c) are one transaction. (d) is second
> > transaction and (e)& (f) constitute third transaction.
> >
> > Together, these three transaction constitute one dialog
> >
> > Do you wanna say INVITE is creating a dialog in this example or Dialog
> > is created after 200 OK response only ??????
> >
> > Example-2:
> >
> > UAC                        UAS
> >       -----INVITE (g)----->
> >       <---100 Trying-(h)----
> >        <--486 Busy (i)------
> >        ---ACK (j)------------->
> >
> >
> > In the example-2, the messages from (g) to (j) constitute one
> > transaction. This is a "no-dialog" scenario.
> >
> >
> >
> > A session refers to the exchange of media between two or more Endpoints.
> > Also, there can be dialogs without SIP sessions.
> >
>
>       If there is no media exchange there should not be session  Am I
> right ????
>
>  Hope that this helps.
> >
> > thanks & regards
> > Abhishek
> >
> >
> > Abhishek Mishra
> > Wipro Tech
> > Tower-8, 1st Floor, C-wing
> > Electronics City Campus
> > Bangalore-560100
> >
> >
> >  ------------------------------
> >  *From:* discussion-bounces at sipforum.org [mailto:
> > discussion-bounces at sipforum.org] *On Behalf Of *Lokesh Agrawal
> > *Sent:* Friday, August 17, 2007 5:29 PM
> > *To:* SIP
> > *Subject:* [SIPForum-discussion] Difference between DIALOG,SESSION and
> > TRANSACTION
> >
> >  Hi All,
> >
> > Can Any one tell me difference between DIALOG, SESSION and TRANSACTION.
> > Please tell in detail with an example.
> >
> >
> > Thanks and Regards
> > Lokesh Agrawal
> >
> >
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