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Hi Bobby,<br>
<br>
The default behavior of RTPProxy is to send timeout notifications
only when both parties stop sending media. This is useful in your
situation, when only one phones sends media. But for solving "ghost
calls" situations, RTPProxy must detect if the media session is
disconnected in only one direction. To enable this feature you must
start RTPProxy with "-i" parameter, but a timeout will be triggered
when the party that has been put on hold stops sending media.<br>
<br>
I have just added an improvement to the nathelper module that allows
you to specify which calls require notifications, by calling
rtpproxy_offer function with 'n' flag.<br>
<br>
Regards,<br>
<br>
<br>
<br>
On 12/16/2010 09:09 PM, Bobby Smith wrote:
<blockquote
cite="mid:AANLkTimoaRu9SWnSHZDkWwk8zdJu22dX4g8OD8PkM2U9@mail.gmail.com"
type="cite">Quick question about this -- does the timeout happen
in the case where two joined sessions are in "sendonly" (ie,
listening to hold music)? If so, is there an easy way around this
and can this feature be enabled on a per force/unforce rtpproxy
function call?<br>
<br>
<div class="gmail_quote">On Thu, Dec 16, 2010 at 1:14 PM, Razvan
Crainea <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:razvancrainea@opensips.org">razvancrainea@opensips.org</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">
Hello all,<br>
<br>
<br>
<br>
Problem<br>
--------<br>
<br>
I just added to OpenSIPS a new feature that makes possible to
deal with "ghost" calls in proper and complete way (detection,
reporting and termination).<br>
<br>
"Ghost calls" are calls where (due network or hardware issue),
one of the end-points simply died without hanging up the call
- so for all the proxies in the middle and for the other end
point, the call will still look like ongoing. This is a huge
problem when dealing with accounting and charging of PSTN
calls.<br>
<br>
As OpenSIPS is a proxy and at signaling level there is no
continues traffic to help in detecting the ghost calls, such
detection must be done at media level.<br>
<br>
A new feature has been added to the nathelper module, that
allows OpenSIPS proxy to terminate calls when a media timeout
occurs in an ongoing call.<br>
<br>
<br>
<br>
Solution<br>
--------<br>
<br>
The overall solution includes the usage of rtpproxy (as media
relay) and opensips (signaling part).<br>
<br>
RTPProxy is used to detect the media timeouts and to report
them back to opensips (via the nathelper module). The
nathelper module binds to dialog module and it will terminate
the call (by sending BYEs in both directions) when such
notification is received. By closing the call at signaling
level, you will have the opportunity (using the "local" route)
to do certain script operations when the BYEs are fired (like
doing accounting, logging, etc).<br>
<br>
This new functionality is very useful for various scenarios
where having a precise call stats is required, like:<br>
- load balancing based on call load<br>
- precise accounting (for PSTN termination)<br>
- dialog profiling (parallel call limitation).....<br>
<br>
<br>
For more information about usage and configurations, visit <a
moz-do-not-send="true"
href="http://www.opensips.org/html/docs/modules/devel/nathelper.html"
target="_blank">http://www.opensips.org/html/docs/modules/devel/nathelper.html</a><br>
<br>
This new feature is available in trunk and in branch 1.6 (it
will be part of the future 1.6.4 stable release).<br>
<br>
Regards,<br>
<br>
-- <br>
Razvan Crainea<br>
<a moz-do-not-send="true" href="http://www.voice-system.ro"
target="_blank">www.voice-system.ro</a><br>
<br>
<br>
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</blockquote>
</div>
<br>
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</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Razvan Crainea
<a class="moz-txt-link-abbreviated" href="http://www.voice-system.ro">www.voice-system.ro</a></pre>
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