[asterisk-users] modem passthru

[William Moore]

On 3/20/07, Mark Farver <mfarver at ticom.com> wrote:
> I suspect the issue is caused by the echo canceller, since I believe the
> issue appear about the time we turned echo cancellation on (for the IAX
> users).  We don't need echo cancellation for PRI to PRI calls.  I've
> looked around, but I am finding conflicting opinions on what the
> "echocancelwhenbridged" line does.  Some say it turns off the echo
> canceller for TDM to TDM calls if set to yes, some say if  it is set to
> no.  Which is correct?

Mark,
The name of the option is fairly clear.  If you want echo cancellation
even when the call is bridged directly from card to card, set the
option to 'yes'.  Otherwise, set the option to 'no'.  This option
should be 'no' in the majority of cases.

William