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: <[EMAIL PROTECTED]> To: <asterisk-users@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:[EMAIL PROTECTED] > 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" <[EMAIL PROTECTED]> > To: "Asterisk Users Mailing List - Non-Commercial Discussion" > <asterisk-users@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 > > _______________________________________________ > --Bandwidth and Colocation provided by Easynews.com -- > > Asterisk-Users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > > _______________________________________________ > --Bandwidth and Colocation provided by Easynews.com -- > > Asterisk-Users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > > > > > _______________________________________________ > --Bandwidth and Colocation provided by Easynews.com -- > > Asterisk-Users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > > > > > > _______________________________________________ > --Bandwidth and Colocation provided by Easynews.com -- > > Asterisk-Users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > > _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users