[Freeswitch-users] Audio only in one direction when calling FS from Skype

[Scott Torr]

I have used a MS-Skype client on the local area network to receive Skype
calls and do not have any audio continuity problems, and would conclude
that there is not an issue with the firewall if this is working
correctly.

To the best of my knowledge the external ip addresses and local networks
are configured properly in FS.


When I use the (linux Skpye client)<=>(mod_skypiax)<=>(FS) to recieve
Skype calls however I cannot hear the incoming audio.

This problem only occurs with an incoming Skype call (ie cannot hear
their audio, they can hear mine).

If I make an outgoing call from FS to Skype there are no audio problem.

So this is an asymmetrical problem.

I have used wireshark and can see UDP packets going in both directions
on the local area network.
So the incoming audio data is hitting the (linux Skype client).


How can I investigate where the data is being dropped?

Is it between:

(linux Skype client)-->(mod_skypiax)
or
(mod_skypiax)-->(FS)
 

I need some advice on what debug commands to use to see where the audio
is being dropped or some clues as to how to pinpoint where the problem
is occurring.


For example is (mod_skypiax) getting the audio data from (linux Skype
client)?

How do investigate that?
How do I see that?
Are there channel IO byte counters?

The machine is using snd_dummy, has no vmware sound card.

It is strange the problem is only in one direction?



Thanks,
Scott Torr



On Sat, 15 Aug 2009 17:20 -0400, "Michael Jerris" <mike at jerris.com>
wrote:
> Make sure your external ip addresses and local networks are configured  
> properly.
> 
> Mike
> 
> On Aug 15, 2009, at 1:31 PM, Scott Torr wrote:
> 
> > Freeswitch-users,
> >
> > I'm very new to Freeswitch and have installed the following in VMware
> > Server 2.0.1
> >
> >
> > ubuntu-8.04.3-server-i386.iso (udate/upgrade)
> > skype-debian_2.0.0.72-1_i386.deb
> > FreeSWITCH Version 1.0.trunk (14492)
> > mod_skypiax
> >
> >
> > Using the FS wiki to install/setup and making small changes to default
> > XML configs as required.
> >
> >
> > (phone)--(SIP ATA)--(FS)--(MS-Skype client | Skype 'online number' via
> > PSTN)
> >
> >
> > The MS-Skype client is on the same local network as FS.
> >
> >
> > I can make calls from the phone to the Skype Client and this works OK.
> > Audio path OK: phone<-->FS<-->Skype
> >
> >
> > But ,if I call from the MS-Skype client to the phone I hear no audio
> > from the MS-Skype client.
> >
> > Audio path: phone<-->FS-->Skype
> >
> > Likewise a call from a Skype 'online number' can hear for example the
> > default 5000 ivr but the DTMF tones from the PSTN phone are not  
> > detected
> > by FS when <action application="start_dtmf" /> is used.
> >
> >
> >
> > Any suggestions or pointers in the right direction would be much
> > appreciated.
> >
> > Most likely I have overlook something very obvious to others.
> >
> >
> > Thanks in advance,
> > Scott Torr
> >
> 
> 
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