[Asterisk-Users] TE411P Really Bad Echo

[Matt]

I vouch for Sangoma's too.

We use sangoma 104d EC card, echoes gone, works well. As to te411p, we have
not tried yet, we don't know.

Best Regards

Matt

----- Original Message ----- 
From: <chip at innovates.com>
To: <asterisk-users at lists.digium.com>
Sent: Saturday, February 11, 2006 2:53 PM
Subject: RE: [Asterisk-Users] TE411P Really Bad Echo


> I can definitely vouch for Sangoma's cards with hardware echo
> cancel.  I've been installing Asterisk boxes for about 6
> months now using Digium TDM cards and Sipura SPA-3000s in
> small installations.  This past month I installed in a small
> office with 3 pots lines.  The echo was very bad and of
> course the phone company (SBC) claims the lines pass all
> tests.  I exhausted all the echo cancel combinations in
> zaptel and still had echo and bad noise during double talk.
> I installed a Sangoma A200 with hardware echo cancel and you
> would never know there was a problem. It's the best sounding
> connection I've heard through Asterisk.
>
> Chip Schweiss
>
>
> -----Original Message-----
> From: asterisk [mailto:asterisk at oneringnetworks.com]
> Sent: Friday, February 10, 2006 10:35 PM
> To: asterisk-users
> Subject: Re: [Asterisk-Users] TE411P Really Bad Echo
>
> 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.
>
> 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.
>
> 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.
>
> Thanks
>
> Stagg Shelton
> www.oneringnetworks.com
>
>
> Matt wrote:
> try sangoma carrier grade 104d hardware EC card. we're using
> it ourself.
>
> Best Regards
>
> Matt
> ----- Original Message ----- 
> From: "Anthony Rodgers" <Anthony_Rodgers at dnv.org>
> To: "Asterisk Users Mailing List - Non-Commercial Discussion"
> <asterisk-users at lists.digium.com>
> Sent: Tuesday, February 07, 2006 12:57 PM
> Subject: Re: [Asterisk-Users] TE411P Really Bad Echo
>
>
>
> 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: http://www.dnv.org
> RSS Feed: http://www.dnv.org/rss.asp
>
>
> On Feb 7, 2006, at 7:36 AM, Matthew Fredrickson wrote:
>
>
> On Feb 5, 2006, at 9:36 PM, Stagg Shelton wrote:
>
>
> I just implemented a system using a TE411P hardware echo
> cancellation
> card. Per Digium, I setup zaptel.conf, and zapata.conf the
> same way
>
> as
>
> 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
>
> I
>
> had to remove the hardware echo cancellation module from the
> card.
>
> We
>
> 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.
>
>
> 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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