[asterisk-users] Simplex voice on TDM410P

Andres andres at telesip.net
Sun May 31 11:14:59 CDT 2009


jonas kellens wrote:

> On my TDM410P pci-card I have an hardware echo cancellation module 
> (Digium VPMADT032 EC Modul).
> I have set 'echocancel=yes' in my chan_dahdi.conf to activate this 
> hardware module.
>
> Do I now have 2 echo cancellers that are activated ? A software echo 
> canceller and a hardware echo canceller ??
>
> Form the documentation on DAHDI :
>
> ; Note that if any of your DAHDI cards have hardware echo cancellers,
>
>; then this setting only turns them on and off;
>  
>
> ;
>
>echocancel=yes
>  
>
I don't think that would happen.   Nevertheless try to disable the echo 
cancel and see if the simplex voice is corrected.  If it is, you might 
want to open a ticket with Digium since you have a problem with the 
Hardware Echo Cancel module.

Andres
http://www.neuroredes.com

>;
>  
>
>
> That's al I have for echo cancellation... I thought the hardware 
> module of Digium was of great quality ?!
>
>>I have seen this happen with the aggressive echo cancel algorithms.  You 
>>might want to look into that.
>>
>>Andres
>>http://www.neuroredes.com
>>    
>>
>
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