[SIPForum-discussion] SIP REFER and new INVITE

[praveena ss]

Hello sampath,
   I think u r talking about call transfer. see once user A is register with
either UDP or TCP the same transport protocol will be used for session. In
your case, user agent A is making a call second time the same transport
which was used in first call with user agent B.

Suppose if User agent A is in UDP and user agent C is in TCP the sip
server/proxy will take care of this.

let me know, if my answer is not suets to you question.

Regards,
Praveen

On Thu, Oct 7, 2010 at 9:08 AM, <sampath.kumar1 at wipro.com> wrote:

>  Hi All,
>
>
>
> Can some one please help in the following scenario?
>
>
>
> User agent ‘A’ calls UA ‘B’ and now ‘B’ want to refer to another UA ‘C’.
>
> Now ‘B” sends REFER method to ‘A’ and receives a NOTIFY message.
>
> And now a new INVITE message will be sent to ‘C’ and call will be
> established.
>
>
>
> My question is, if the first call is an UDP call and now who will decide
> which transport protocol it should use in the second call towards ‘C’.
>
>
>
> Thanks in advance,
>
>
>
> Regards,
>
> Sampath kumar
>
>
>
>
>
>
>
>
>
> _______________________________________________
> This is the SIP Forum discussion mailing list
> TO UNSUBSCRIBE, or edit your delivery options, please visit
> http://sipforum.org/mailman/listinfo/discussion
> Post to the list at discussion at sipforum.org
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sipforum.org/pipermail/discussion/attachments/20101007/c187dff4/attachment-0002.html>