Thanks for the suggestion.  I am using a tdm400p with 4 fxo channels.  I am
in the US, so opermode should not be ok at default settings.  I just
recently got fxotune working on my system.  The version that comes with
zaptel 1.2.16 would simply hang.  I am using the 1.4 fxotune now with the
1.2.16 driver.  That has reduced the echo coefficient from 35% to 8%.  We
will see how that does.

--
Michael Boers

On 4/6/07, Tzafrir Cohen <[EMAIL PROTECTED]> wrote:

On Fri, Apr 06, 2007 at 04:11:45PM -0400, Michael Boers wrote:
> In an article on voip-info.org (
> http://www.voip-info.org/wiki/view/Asterisk+setup+research+lab ) , it is
> suggested that one thing you can try to reduce echo is to insert a 500
ohm
> resister on the ring line of the POTS line.  Has anyone successfully
tried
> this?  What was your experience.  Also, what size 500 ohm resister would
you
> use?  I am not an electrical engineer, but I can wire a circuit in
series.

Which adapter do you have?

for most of those that are not x100p, start with setting a proper
opermode. If that is not good enough, try fxotune.

Both of these play with characteristics of the card that are equivalent
to adding an extra resitor and also other similar changes.

--
               Tzafrir Cohen
icq#16849755                    jabber:[EMAIL PROTECTED]
+972-50-7952406           mailto:[EMAIL PROTECTED]
http://www.xorcom.com  iax:[EMAIL PROTECTED]/tzafrir
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