[Freeswitch-users] Port changes in multiple 183s cause no audio after 200

Jeff Pyle jpyle at fidelityvoice.com
Mon Mar 16 17:18:34 MSK 2015


Michael,

I don't believe so.  I haven't seen any activity in the Jira
<https://freeswitch.org/jira/browse/FS-7207>.


- Jeff


On Fri, Mar 13, 2015 at 10:18 PM, Michael St-Georges <
m.stgeorges at csl-technologies.com> wrote:

> Steven Ayre <steveayre at ...> writes:
>
> >
> >
> > This sounds like it belongs on Jira so the issue can be tracked.
> >
> > On 27 January 2015 at 00:04, Jeff Pyle <jpyle-
> eOOfO1YW0K2EOSkOl7zanAC/G2K4zDHf at public.gmane.org> wrote:
> > Hello,
> > The following is on FreeSWITCH Version
> 1.5.15b+git~20150126T215733Z~c16f9ec1d9~64bit (git c16f9ec 2015-01-26
> 21:57:33Z 64bit).
> >
> > The design goal for this configuration is that of a simple transcoding
> SBC.  SIP calls arrive with various supported codecs, SIP calls bridge
> out on PCMU.  No users, no auth, etc.  Overall, it seems to work but
> there is one call flow I'm struggling with.
> >
> > The B-leg of calls are bridged to a PSTN gateway.  If the gateway's
> signaling follows 100, 183, 200, all is well.  But if the gateway sends
> multiple 183s with different RTP ports, there is no audio when the call
> goes to 200.  See the following example:
> >
> >  - Gateway signals 183 with SDP indicating audio on port 16384. -
> Gateway signals 183 with SDP indicating audio on port 16386. - Gateway
> signals 200 with SDP indicating audio on port 16384 (same as original
> 183).
> >
> > In the debug I see where it detects the port change from 183 #1 to 183
> #2.  As such, I hear early media from both until the 200 OK.  When the
> call connects, I see no such port change in the debug, and since it's
> still listening on the wrong port (from 183 #2), there is no audio.
> >
> > I've seen some older posts where Anthony seemed against even the port
> change from 183 #1 to 183 #2, yet that seems to work okay today.  It
> just doesn't sense the port change from 183 --> 200.  I don't know if
> this is a feature, bug, or misconfigured option.  Thoughts are welcome!
> >
> >
> > - Jeff
> >
> >
> >
> >
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> Was this ever fixed? I have a similar problem with the behavior of a
> Samsung PBX that connects to a FreeSwitch.
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