[Freeswitch-users] Early Media troubles

[Jock McKechnie]

And I agree that it must work, somewhere. But it does not.

Work with me here: Firstly, I tcpdumped on the FreeSWITCH machine. If I'm
not seeing the RTP on the FS machine, it's not going to be anything like a
firewall or a NAT issue. Secondly, and far more telling (as the above could
be related to me screwing up the tcpdump somehow): I get the Playback audio,
so it is possible to get audio back down the line eventually and the RTP
does reach the caller, so RTP is able to flow from FS to caller without
interference (as I said in the initial mail, the only RTP sent from FS
starts _after_ the 200 OK). It simply is that FS is not sending out early
media.

Like I said, either I'm doing something remarkably stupid, or there is
something extremely strange going on here.

Should I try to use ring_ready AND pre_answer in combination? I have not
attempted that yet. If so, in what order?

 - JP

On Mon, Aug 30, 2010 at 2:15 PM, Brian West <brian at freeswitch.org> wrote:

> I can tell you without a doubt it works. Ring_Read == 180 ringing,
> pre_answer == 183 early media.  I suspect your firewall or you have nat
> involved and you're not catching on to what is going on.
>
> /b
>
> On Aug 30, 2010, at 2:10 PM, Jock McKechnie wrote:
>
> > Thank you, Brian.
> >
> > I have actually omitted an awful lot of "grasping at straws" steps,
> however I have tried this (and I did it again, just now, both with the .wav
> ringback and the cadence ringback, just to be certain I hadn't imagined it)
> and there is still no RTP coming out after the 183.
> >
> > The ringback after pre_answer was tried because of this:
> http://wiki.freeswitch.org/wiki/Misc._Dialplan_Tools_ring_ready
> > (I also tried ring_ready instead of a pre_answer without any particular
> progress - although I don't understand, for the same reason as above, why
> ringback being set after ring_ready actually works... Not that it does for
> me, anyway ;)
> >
> > So, apparently, not quite _that_ easy. Perhaps something else I've
> missed?
> >
> >  - JP
>
>
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