My experience is that both T1 and TDM cards from Sangoma which come with HWEC (hardware echo cancellation) give you excellent sound quality, better than those without HWEC. They do something which not only removes echo, but improves sound quality as well. Digium I haven't tried because of motherboard conflict issues. Sangoma's reviews are better than Digium's.
<br><br><div><span class="gmail_quote">On 9/24/07, <b class="gmail_sendername">Leon de Rooij</b> <<a href="mailto:leon@scarlet-internet.nl">leon@scarlet-internet.nl</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi all,<br><br>We need to get better echo cancellation on an Asterisk gateway.<br><br>Currently it has two TE410P (1st gen) cards. So would it be possible to<br>just buy two VPM450M cards ? Or do we need to buy two new TE412P cards ?
<br>In that case a Sangoma A108d card would be nice as well ?<br><br>What configuration gives the best audio quality ?<br><br>Thanks,<br><br>Leon de Rooij<br><a href="mailto:leon@scarlet-internet.nl">leon@scarlet-internet.nl
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