[SIPForum-discussion] Can we use the same URL in From header of UA(User Agent) Message (REFER)to add in Contact header to bulid same message(in proxy)

[Tomasz Zieleniewski]

Hi,

Yes, of course.
REFER message can be sent outside of the dialog (in which case it creates
it's own one)
So the request must contain the Contact header field which contains global
scope SIP or SIPS URI
which is an address where the UAC would like to be contacted for subsequent
requests in the dialog.
UAS uses Contact header from the request as the remote target value.

Regards
Tomasz Zieleniewski

2009/2/10 <ashok.pitambar at wipro.com>

>  Hi All ,
>
>  Can we use the  same URL in From header of  UA(User Agent) Message
> (REFER)to add in Contact header to bulid same message ?.
>
> Check  this folw ...
>
> UA(A)                               ---->PROXY(domain1.com)
> ----->PROXY(domain2.com)-            --->UA(B)
>
>
> REFER                             ----->
> REFER                -------->      REFER                      -------->
> REFER
> From A at domain1.com        From A at domain1.com                    From
> A at domain1.com                    From A at domain1.com
>  To B at domain2.com           To B at domain2.com                           To
> B at domain2.com                        To B at domain2.com
>                                    * Contact:**A at domain1.com*<A at domain1.com>
> *Contact:**A at domain1.com* <A at domain1.com>*:*       *Contact:**
> A at domain1.com* <A at domain1.com>*:*
> **
>
>
>   Regards ,
> ASHOK PITAMBAR
>
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