[Freeswitch-users] Early Media troubles

[Jock McKechnie]

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

On Mon, Aug 30, 2010 at 1:57 PM, Brian West <brian at freeswitch.org> wrote:

> I already emailed you the solution but i'll reply so everyone will know.
>
> Set ringback before you pre_answer.
>
> /b
>
> On Aug 30, 2010, at 1:49 PM, Jock McKechnie wrote:
>
> > Good arvo, all;
> >
> > I'm battling with a problem in making Early Media play and getting
> nowhere. I've searched the wiki, forums and the web in general without
> anything that seems to help. This suggests to me that I'm either doing
> something stupendously stupid, or there's a very, very odd thing going on
> here.
> >
> > I've been tasked with something that should be fairly simple:
> > Accept an inbound call
> > Play a specific audio file as early media
> > Pickup the call after a certain time interval
> > Play another audio file into the off-hook channel
> > Disconnect the call.
> >
> > Sounds simple. My extension looks like so:
> >    <extension name="Inbound">
> >       <condition field="destination_number" expression="^\+12125551212$">
> >           <action application="pre_answer"/>
> >           <action application="set"
> data="ringback=/usr/local/freeswitch/sounds/early-media.wav"/>
> > <!--          <action application="set" data="ringback=%(2000, 4000,
> 440.0, 480.0)"/> -->
> >           <action application="sleep" data="10000"/>
> >           <action application="answer"/>
> >           <action application="playback"
> data="/usr/local/freeswitch/sounds/playback"/>
> >           <action application="hangup" data="16"/>
> >       </condition>
> >    </extension>
> > (Replace the 212 number with a real inbound DID which is being routed
> from Verizon (via SIP) to this FreeSWITCH machine)
> >
> > The call is received, a 183 is sent by FreeSWITCH (pre_answer), it waits
> the 10 seconds, picks up the call and plays the playback.PCMU file... but
> there's no early media. I've tcpdumped on the FS machine and verified it
> definitely is /not/ sending out RTP until the call 200 OKs and the Playback
> begins.
> >
> > As you can see, I've also attempted to replace the ringback= to a cadence
> instead of a WAV file, just to ensure it isn't unhappy with the WAV format,
> with the same results.
> >
> > Boy, I'd sure love it if someone could point out what potentially brain
> damaged thing I'm doing (assuming it's nothing arcane).
> >
> > My thanks to all;
> >  - Jock
>
>
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