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<DIV><FONT face=Arial size=2>Stagg - I know you get a full 128ms tail of echo
can on the Sangoma. I believe that on the TE411P, the 128ms tail is shared
by all (4) spans, and as you add additional spans up to maximum of 4, the echo
can tail amount decreases accordingly. If you are running 4 spans, you
have 32ms of echo can tail on each span, not the full 128ms.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Now that I'm reading back through your post thread,
it looks like you were only running 1 span on the TE411P, so you should have
been getting the full 128ms of echo can tail. You may not find an
improvement with the Sangoma. I have never experience, nor heard of a 1-2
full second delay. Trial and error is likely your course of action.
</FONT></DIV>
<DIV> </DIV>
<DIV>Cory J Andrews<BR>++++++++++++<BR>VOIPSupply.com<BR>454 Sonwil
Drive<BR>Buffalo, NY 14225<BR>++++++++++++++<BR>voice - 716.630.1555
X22<BR>email - <A
href="mailto:Cory@VOIPSupply.com">Cory@VOIPSupply.com</A><BR>AIM - B2CORY</DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=asterisk@oneringnetworks.com
href="mailto:asterisk@oneringnetworks.com">Stagg Shelton</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=asterisk-users@lists.digium.com
href="mailto:asterisk-users@lists.digium.com">Asterisk Users Mailing List -
Non-Commercial Discussion</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, February 10, 2006 11:34
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Asterisk-Users] TE411P
Really Bad Echo</DIV>
<DIV><BR></DIV>It was Digium's opinion that perhaps the card had a VPM.
We got a replacement TE411P, I implemented it tonight and still the exact same
echo problem. At this point I feel like I can rule out failed
hardware. <BR><BR>I contacted Digium support and now they are telling me
it's something with my carrier, and I should call them. I called
Bellsouth, and they ran a full stress test on the circuit taking me offline
for about 30 minutes. <BR><BR>The end result is that the circuit test
passed with no errors. Bellsouth says it's not in their network, Digium
says its not their card, and I have a te411p with VPM disabled in the wct4xx
kernel module because something doesn't work the way it should. My
customer is wanting to know about sangoma cards with the echo cancellation,
and at this point I'm nervous to recommend any hardware. I'm going to
look into the sangoma that you suggested. Are there any other kinds of
products that I could look into either Passive or Active.<BR><BR>Thanks
<BR><BR>Stagg Shelton<BR><A class=moz-txt-link-abbreviated
href="http://www.oneringnetworks.com">www.oneringnetworks.com</A><BR><BR><BR>Matt
wrote:
<BLOCKQUOTE cite=mid003001c62c66$8adaf6d0$0301a8c0@bbzlsgmfs2be6y type="cite"><PRE wrap="">try sangoma carrier grade 104d hardware EC card. we're using it ourself.
Best Regards
Matt
----- Original Message -----
From: "Anthony Rodgers" <A class=moz-txt-link-rfc2396E href="mailto:Anthony_Rodgers@dnv.org"><Anthony_Rodgers@dnv.org></A>
To: "Asterisk Users Mailing List - Non-Commercial Discussion"
<A class=moz-txt-link-rfc2396E href="mailto:asterisk-users@lists.digium.com"><asterisk-users@lists.digium.com></A>
Sent: Tuesday, February 07, 2006 12:57 PM
Subject: Re: [Asterisk-Users] TE411P Really Bad Echo
</PRE>
<BLOCKQUOTE type="cite"><PRE wrap="">For what it's worth, we have been going through very similar issues
with a TE411P - with Digium support, we have basically gone as far as
we can with the HW EC, and are now using MG2 with much better results.
We have a Ditech EC box on order.....
Regards,
--
Anthony Rodgers
Business Systems Analyst
District of North Vancouver
Web: <A class=moz-txt-link-freetext href="http://www.dnv.org">http://www.dnv.org</A>
RSS Feed: <A class=moz-txt-link-freetext href="http://www.dnv.org/rss.asp">http://www.dnv.org/rss.asp</A>
On Feb 7, 2006, at 7:36 AM, Matthew Fredrickson wrote:
</PRE>
<BLOCKQUOTE type="cite"><PRE wrap="">On Feb 5, 2006, at 9:36 PM, Stagg Shelton wrote:
</PRE>
<BLOCKQUOTE type="cite"><PRE wrap="">I just implemented a system using a TE411P hardware echo cancellation
card. Per Digium, I setup zaptel.conf, and zapata.conf the same way
</PRE></BLOCKQUOTE><PRE wrap="">as
</PRE>
<BLOCKQUOTE type="cite"><PRE wrap="">I always have. To my surprise calls out to the PSTN had a terrible
echo. 1 - 2 second delay, and quite clear. The echo was so bad that
</PRE></BLOCKQUOTE><PRE wrap="">I
</PRE>
<BLOCKQUOTE type="cite"><PRE wrap="">had to remove the hardware echo cancellation module from the card.
</PRE></BLOCKQUOTE><PRE wrap="">We
</PRE>
<BLOCKQUOTE type="cite"><PRE wrap="">are only using the 1st span of this card right now, and we have a
tdm400p with 4 fxs modules installed as well.
If anyone has experience with this card, can you tell me if I am
missing
something.
</PRE></BLOCKQUOTE><PRE wrap="">1 to 2 seconds?! That's ridiculously huge. I don't think you'll find
a echo canceler anywhere that can fix your echo problem. If it gets
better with the VPM disabled, then definitely contact Digium
tech-support about it.
Matthew Fredrickson
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