[SIPForum-discussion] regarding tag parameter in From header

[Ankit Agarwal]

Hi

>From tag + to tag + call Id => call leg.

Which means it important to be in msg in order to find out which dialog it
belongs to.

Is not an option field so it must be in present in INVITE.


Ankit Agarwal




On Wed, May 5, 2010 at 2:23 PM, Roy, Nishant Kishore <nishantkr at hp.com>wrote:

>  Hi All ,
>
>
>
> Can anyone help me out with following question :
>
>
>
> 1)      What is the uses of From tag in from header .
>
> AFAIK : it will be used in dialog creation which consist of tag from TO
> header and FROM header along with Call-ID , what else ?
>
>
>
> 2)      Is this mandatory in the initial INVITE message ? If not in which
> case it will be optional ?
>
>
>
> Regards
>
> Nishant
>
>
>
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