[Asterisk-Users] Echo with two IP phones through Asterisk using SIP

[trixter http://www.0xdecafbad.com]

I had echo with sjphone, upgraded to x-pro (www.xten.com) today, its $30
but it seems to have eliminated the echo entirely and made my ipaq
usable.

That may help your problem, although its not free..  sjphone did not
seem to have any more options to tweak, asterisk didnt either, so my
last choice was to buy software.  

Sorry if that is the only option for you, but it appears to be that
sjphone doesnt have any echo cancelation and on some devices (like my
ipaq) the audio in/out is so closely coupled that echo is unavoidable,
on any non headset device it also appears to be.



On Thu, 2005-05-26 at 18:00 -0400, qrss wrote:
> One component of the echo that you are hearing is likely caused by poor
> acoustic isolation in the headset of "the caller" that you described.  It
> might be eliminated by having "the caller" adjust their mic levels down
> slightly.  Better quality headsets usually have better acoustic isolation
> properties too.
> 
> 
> -----Original Message-----
> From: Davin O'Neill
> Sent: Thu, May 26, 2005 8:49 am
> 
> I have Asterisk running on my LAN with softphone clients (SJPhone) and
> > Cisco
> 7940/60s, all using SIP.  I also have a few remote sites connecting to my
> Asterisk server.  I am getting an echo back of my voice when talking with
> one particular site.  The caller does not hear an echo on their end.  All
> calls on the LAN or to other sites do not produce an echo.  When the
> > caller
> places his SJPhone on mute there is no echo.  The caller is using a
> > standard
> PC headset and not a speakerphone.  I've tried turning on echocancel and
> echotraining in the Zapata configuration, but it had no effect.
> 
> The website below states that  two IP phones going through Asterisk should
> not result in a noticeable echo, instead this is more common when
> > connecting
> to PSTN lines. The echo is about 500ms, faint but distracting.  Any
> suggestions would be greatly appreciated.
> 
> http://www.voip-info.org/wiki-Asterisk+Echo+Avoidance
> 
> Thanks!
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-- 
Trixter http://www.0xdecafbad.com
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