[SIPForum-discussion] Reg : Issue with 40 min call disconnection

[Sathya]

Hi,

 Thanks for your reply.

 The call flow is as follows

 Origination device  ------>  SBC -------> Destination SBC.

Suppose if  there is no Re-Invite after half of the time of session expiry
then what will happen to the ongoing call .. will it get disconnected if yes
at what time.

If session expiry is not mandatory on a sip call then what is the actual use
of this parameter.

Kindly clarify.

Regards

Sathya.



On Wed, Oct 27, 2010 at 1:22 AM, Garron, James <jgarron at sonusnet.com> wrote:

>  Inline
>
>
>  ------------------------------
>
> *From:* discussion-bounces at sipforum.org [mailto:
> discussion-bounces at sipforum.org] *On Behalf Of *Sathya
> *Sent:* Tuesday, October 26, 2010 6:13 AM
> *To:* discussion at sipforum.org
> *Subject:* [SIPForum-discussion] Reg : Issue with 40 min call
> disconnection
>
>
>
> Hi All,
>
>     I have come across one issue wherein the sip call gets disconnected
> within 40 minutes from the destination end. Also found that the issue was
> due to no session expiry parameter was set in the originating device.
>
> Kindly clarify
>
> 1. If the originating device has no settings ( fields ) for minimum session
> expiry then will the SBC automatically refresh the session.
>
>
>
> SBC can send a re-INVITE to the originating device even if session expiry
> was not sent, but can not expect the originating device to send one as it
> did not advertise that it could/would.
>
>
> 2. If 3600 is the session expiry time then at what time the re-invite
> should generate to refresh the session and which end should generate the
> re-invite ( Source or destination ).
>
>
>
> If the session expiry is set to 3600 you should expect that the re-INVITE
> will be sent at half this duration or 1800 (15 mins).  This is to ensure
> that the other end has time to respond.  The device that sends the re-INVITE
> is negotiated using refresher=uac (or uas).
>
>
> 3. Is the session expiry and min session expiry settings is mandatory on a
> sip call.
>
>
>
> No, they are not mandatory.
>
>
>
> Kindly clarify the above points
>
> Thanks
>
> Sathya.
>
>
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sipforum.org/pipermail/discussion/attachments/20101027/367c7ecc/attachment-0002.html>