[asterisk-users] TDM400 native bridge echo

[Shaun Kruger]

I didn't cut and paste the whole file.  The signalling is correct.  I
was only making sure I got the parts about echo and bridging behavior.
 The setup is "working" it's just that it has bad audio quality.

Shaun

On 11/20/06, Mervyn Yeo <celerius at mervyn.org> wrote:
> Hi Shaun,
>
> I'm new at this but I do have some queries on your setup. You have two
> interfaces and three channels? And there's only signalling specified
> for channel 3? If I am not wrong, the channel inherits all the
> settings from before it.
>
> Mervyn
>
> On 11/21/06, Shaun Kruger <shaun.kruger at gmail.com> wrote:
> > I have a TDM400 with an FXS and FXO interface.  I have adjusted the TX
> > and RX gain for both the FXS and FXO channels so that everything is
> > balanced.
> >
> > I hear myself very loudly with no lag.  I also get alot of background
> > noise when the bridge is formed between the FXS and FXO channels.  I
> > have read the following articles:
> > http://www.voip-info.org/wiki/view/Asterisk+echo+cancellation
> > http://www.voip-info.org/wiki/view/Causes+of+Echo
> >
> > I have read these multiple times.  My system is now useable, but it's
> > definitely worse than when I plug the phone directly into the wall.
> >
> > My loadzone is 'us'.
> > I have the following in my zapata.conf
> > usecallerid=yes
> > transfer=yes
> >
> > channel => 1
> > context=outbound
> > mailbox=00
> > channel => 2
> >
> > echocancel=yes
> > echocancelwhenbridged=yes
> > context=inbound
> > signalling=fxs_ks
> > faxdetect=incoming
> > busydetect=yes
> > busycount=5
> > rxgain=5.2
> > txgain=-0.5
> > channel => 3
> >
> > Is there anything I'm missing?  I assume there is because it's not
> > working as well as I had hoped.  Any suggestions of what to try next,
> > what to look for, or what additional documentation I should be reading
> > would be much appreciated.
> >
> > Shaun
> >
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Visit my blog at http://hackerlog.blogspot.com
=====================================================
If more of us valued food and cheer and song above hoarded gold, it would
be a merrier world.
                -- J.R.R. Tolkien