[SR-Users] Audio on Calls Stopping After 15 Minutes

[Sergiu Pojoga]

900 seconds is the most common call session renegotiation period, that's
when a re-INVITE is sent from one party to the other, which similar to the
original INVITE has SDP information in it. If there's something wrong with
the re-INVITE, the call may go silent one/both ways either drop, it depends.

General recommendation would be to check SIP traffic at the 15 min mark and
analyze the re-INVITE, see if there's anything wrong with it.

Cheers,

On Thu, Aug 6, 2020 at 2:06 AM admin at conradit.com <admin at conradit.com>
wrote:

> All, hi:
>
>
>
> I’m a Kamailio newbie!
>
>
>
> I’ve managed to set up a proxy server with the minimal configuration file
> found here:
> https://github.com/kamailio/kamailio/blob/master/misc/examples/mixed/kamailio-minimal-proxy.cfg
> .
>
>
>
> The issue that I’m having is that the audio on calls simply stop precisely
> after 15 minutes. It’s always precisely at 15 minutes. The calls continue
> connected but without any audio.
>
>
>
> A summary about my set up:
>
>
>
> 1.    This is an Amazon AWS EC2 server so it doesn’t have a public IP
> directly attached to the interface. This makes me believe that the issue
> might be related to NAT.
>
> 2.    I use Flowroute as the SIP trunk for these tests.
>
> 3.    My phone system, for testing purposes, works on UDP port 6060 an
> the RTP ports are 20,000 to 30,000.
>
> 4.    I am not using, for the time being, TLS nor SRTP.
>
> 5.    My phone system is inside the same subnet as the Kamailio server.
>
>
>
> Questions:
>
>
>
> 1)    Am I missing the NATHELPER module and if so how could we combine it
> to the minimal proxy configuration described above? Assuming that my
> Kamailio server uses local IP 10.80.10.5 and the PBX 10.80.10.6, both on
> UDP port 6060 for SIP.
>
> 2)    May I simply combine the example file for nathelper.cfg as per this
> URL:
> https://github.com/kamailio/kamailio/blob/master/misc/examples/mixed/nathelper.cfg
> to the proxy example files, change IP addresses, ports, etc.? If not, how
> would one go about adding the NATHELPER module to the minimal proxy
> configuration?
>
> 3)    Could it be some other issue that is causing the 15-minute
> interruption on audio?
>
>
>
> Thank you so much for your help!
> _______________________________________________
> Kamailio (SER) - Users Mailing List
> sr-users at lists.kamailio.org
> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>
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