asterisk users - Oct 2004 - echo questions

Got echo on my X100P FXO line and am looking for some improvement.  I
think I've read what the Wiki has to offer and the use of ztmonitor to
evaluate adjustments to rxgain and txgain seems promising but I'm lost as
to how to read the results.

{ First, please forgive this Computer Engineer who opted to
  take more microcode and digital hardware classes in school
  rather than the analog circuits and signals classes that
  would likely prove more useful here. }

The Wiki says "Place a call, let the remote party talk, then adjust them
until they sound better."  Is there a way to adjust them in the CLI or do
I need to adjust them in the conf file and restart between tests?

What am I looking for with ztmonitor?   I get that it's a "meter"
depicting volume but what does "bad" look like versus
"good".

Also, I've heard some suggest that a FXO module in a TDM400P does a better
job at echo canceling.  Could someone elaborate on this?

Paul

--
Paul A. Dugas                               Dugas Enterprises, LLC
email: paul@dugasenterprises.com            1711 Indian Ridge Drive
phone: 404.932.1355  fax: 770.516-4841      Woodstock, GA 30189 USA
   [ onsite at the Georgia DOT's West Annex, 404.463.2860 x158 ]

>From the tiki....
The purpose is to get the HASH marks about half way on both the TX and
RX for best results.


So, adjust the txgain and rxgain until you see the hash marks get to
about the 50% mark when parties are talking.  That should help a good
bit.

Jeremy

On Mon, 25 Oct 2004 14:36:46 -0400 (EDT), Paul Dugas
<paul@dugasenterprises.com> wrote:
> Got echo on my X100P FXO line and am looking for some improvement.  I
> think I've read what the Wiki has to offer and the use of ztmonitor to
> evaluate adjustments to rxgain and txgain seems promising but I'm lost
as
> to how to read the results.
> 
> { First, please forgive this Computer Engineer who opted to
>  take more microcode and digital hardware classes in school
>  rather than the analog circuits and signals classes that
>  would likely prove more useful here. }
> 
> The Wiki says "Place a call, let the remote party talk, then adjust
them
> until they sound better."  Is there a way to adjust them in the CLI or
do
> I need to adjust them in the conf file and restart between tests?
> 
> What am I looking for with ztmonitor?   I get that it's a
"meter"
> depicting volume but what does "bad" look like versus
"good".
> 
> Also, I've heard some suggest that a FXO module in a TDM400P does a
better
> job at echo canceling.  Could someone elaborate on this?
> 
> Paul
> 
> --
> Paul A. Dugas                               Dugas Enterprises, LLC
> email: paul@dugasenterprises.com            1711 Indian Ridge Drive
> phone: 404.932.1355  fax: 770.516-4841      Woodstock, GA 30189 USA
>   [ onsite at the Georgia DOT's West Annex, 404.463.2860 x158 ]
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