[Asterisk-Users] Echo cancellation

[Aaron Daniel]

We currently have about 60 cisco 7940's, which were converted from cisco
call manager to be used for asterisk.  We're running 1.2.1 stable on 4
systems (primary server, backup server, gateway, and voicemail).  The
phone lines come into the gateway on a digium te405p.  The problem we're
having is that the 7940's are echoing on outgoing calls, and I'm not
sure what else to try (I did just recompile zaptel with a different echo
canceler to see if it would help), but I seem to remember asterisk
doesn't do echo cancellation on outgoing calls.  I researched a bit on
qos and latency, but there's maybe a 10ms latency between the phone and
the outgoing line, so I ruled that out pretty quick.  Any help is
greatly appreciated.

Aaron

On Tue, 2006-01-03 at 21:26 -0800, Erick Baum wrote:
> Can you provide some details about the system, what version of
> Asterisk, what kind of phones, what kind of phone lines, etc.
>  
> Erick
> 
>  
> On 1/3/06, Aaron Daniel <amdtech at shsu.edu> wrote: 
>         I've got a slight problem with echo.  Basically, most of the
>         outgoing
>         phone calls on our system echo, but as far as I can tell, the
>         incoming 
>         echo has been relatively fixed, with just a bit of work left
>         to do on
>         it.  I read somewhere that asterisk doesn't echo cancel on
>         outgoing
>         calls, am I wrong in that assumption, and if I am, what else
>         can be done
>         when the echo training and echo cancel tapping isn't working?
>         
>         Aaron
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> 
> -- 
> | Erick Baum
> | Teal Networks, Inc.
> | http://www.teal.net 
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