[SIPForum-discussion] What are the uses of P-Preferred-Identity??

Gopalakrishnan N saigop at gmail.com
Mon Aug 17 14:17:17 UTC 2015

I have seen some kind of senario, where the caller-id is spoofed when the
call is getting transferred from one PBX to another PBX, where the
caller-id changes and sometimes call won't land properly. In this scenario
>From header won't change.

Hope this helps.


On Mon, 17 Aug 2015 at 01:26 pendyala syam <psyam545 at gmail.com> wrote:

> Hi All,
> As far I understand, P-Preferred-Identity will be shown as caller display
> name in callee UI. When SIP already have From header which carriers the
> caller identity, why is this P-Preferred-Identity header required? Why
> can't we use From header to show caller display name at callee UI?. Is
> there any added advantage of this header. Some body please explain. Thanks
> in advance.
> Regards,
> Pendyala
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