[SIPForum-discussion] Require Header Field In SIP

[Arunachala]

Hi Bilal,
   I can confirm that 'Require: Timer' indicates that the UA needs the
support for Session-Expires header and subsequent handling of this header,
which is used to refresh session parameters.

RFC 4028 describes Session-Expires header and timer extension.

Regards,
Arun

On Sun, Dec 21, 2008 at 12:03 PM, Bilal Ahmed <bilal.ah at gmail.com> wrote:

>
> Hi,
>
> 1.I am having a problem with my SIP server which is continuously sending
> the value of Timer in Require header field as *Require:Timer; *in 200 OK
> messages after call establishment. Is there any way we can figure out which
> timer is exactly required by the SIP server(Any relevant RFCs?) I have
> attached the wireshark dump(Kindly enable a filter on SIP messages)
>
> 2.Moreover its a breakout SIP call from an IMS network to GSM subscriber
> via a third party MGCF(our SIP server), call continues for 14 secs exaclty
> and then drops by reception of CANCEL message from IMS BGCF to our SIP
> server and what i am suspecting is that IMS BCGF issues CANCEL when it
> cannot fulfull *Require:Timer *from SIP server. Can anyone confirm this as
> well in attached wireshark dump?
>
> Thanks in advance,
>
> --
> Regards,
> Bilal Ahmed
>
>
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