asterisk users - Aug 2005 - Activate/Deactivate Hardware echo cancellation on TE406/TE411 when briging

Hi,

How would one activate/deactivate hardware echo cancellation on the
TE406 card?
Can it be done per channel?

I'm going to run TE406 in the following scenario:

ISDN -> TE406 -> PABX

I understand from Steve Underwood's site that echo cancellation is not
good for faxes (and they do that themselves).

So what I want to do and bypass echo cancellation for selected
extensions before bridging the calls from span1 to span2.

Thanks!

If the call is a fax then the board will know that and stop the echo
cancellation, in any case when doing pri to pri calls, by default
(when using software echo can) asterisk will not do any echo can at
all (you can change that in zapata.conf). The on board echo can is not
cinfigurable AFAIK, this is what I got in response to this question
from Digium:

The hardware echo cancellation has no software settings. The echo
settings in zapata.conf are for the software echo cancellation, which
you will not be using while the hardware echo can module is installed.

I hope this helps.


On 8/29/05, Boris Bakchiev <boris@jildent.com.au>
wrote:
> Hi,
> 
> How would one activate/deactivate hardware echo cancellation on the
> TE406 card?
> Can it be done per channel?
> 
> I'm going to run TE406 in the following scenario:
> 
> ISDN -> TE406 -> PABX
> 
> I understand from Steve Underwood's site that echo cancellation is not
> good for faxes (and they do that themselves).
> 
> So what I want to do and bypass echo cancellation for selected
> extensions before bridging the calls from span1 to span2.
> 
> Thanks!
> 
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