This may be of some use to you on your quest:
http://bugs.digium.com/bug_view_page.php?bug_id=0002820
> -----Original Message-----
> From: Kris Boutilier
> Sent: Tuesday, March 08, 2005 2:01 AM
> To: [EMAIL PROTECTED]; Asterisk Users Mailing List -
> Non-Commercial
> Discussion
> Subject: RE: [Asterisk-Users] Tweaking AGGRESSIVE_SUPPRESSOR
>
>
> The style of echo canceller in use in MEC2 cannot cope with
{clip}
>
> -----Original Message-----
> From: Dennis Webb [mailto:[EMAIL PROTECTED]
> Sent: Monday, March 07, 2005 10:51 AM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [Asterisk-Users] Tweaking AGGRESSIVE_SUPPRESSOR
>
>
> This seems to be how AGGRESSIVE_SUPPRESSOR works. To make
> sure you don't get echo, it does what a speakerphone does,
> mute the other party if it hears audio from your end. There
> is a setting in mec2_const.h for AGGRESSIVE_HCNTR=160 that
> says in the comments 20ms, I'm assuming this is to tell how
> long to suppress the other party. There is nothing on this
> that I have found anywhere and since we are live, I can't
> change until later to see how it works.
> {clip}
>
>
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