<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hello,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’m new to Echo Cancellation and I was wondering how it is handled/works on pure VoIP networks using Asterisk?<o:p></o:p></p><p class=MsoNormal>I did some research on the internet about EC on VoIP networks, but I can’t really put a grasp on it. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>We currently have some Echo Cancellation chips on our Digium cards, but are planning to move to a full VoIP network based on Asterisk. So no more ISDN in the voice path.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Does Asterisk have any pre-installed Echo Cancellation software?<o:p></o:p></p><p class=MsoNormal>Which hardware cards are recommended for doing echo cancellation on VoIP networks?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I hope someone could point me into the right direction.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Regards,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Grant<o:p></o:p></p></div></body></html>