asterisk users - Jan 2006 - zaptel echo canceller preload patch

I've just posted the patch across to the dev list. I'll post it here if
anyone asks for it, but didn't want to initially, lest the crossposting
gods strike me down from above :)

James

James Harper wrote:
>I've just posted the patch across to the dev list. I'll post it here
if
>anyone asks for it, but didn't want to initially, lest the crossposting
>gods strike me down from above :)
>
>James
>  
>
As someone who doesn't appreciate what parts this effects, does this 
enhancement mean that after we :

zt_ec_preload -d 1 <echo_data_chan_1

that there would be no reason to use echotraining because this sets the 
channel up ahead of time and only changes caused by the echocancel's 
live adjusting would make any changes to the echocanceling settings/affect?

Sorry if these are obvious questions, but I would like to know what I 
need to setup to properly test it ;).

thanks,
JES
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> As someone who doesn't appreciate what parts this effects, does this
> enhancement mean that after we :
> 
> zt_ec_preload -d 1 <echo_data_chan_1
> 
> that there would be no reason to use echotraining because this sets
the
> channel up ahead of time and only changes caused by the echocancel's
> live adjusting would make any changes to the echocanceling
> settings/affect?
> 
> Sorry if these are obvious questions, but I would like to know what I
> need to setup to properly test it ;).
> 
Preloading the ec is only going to be useful when you have echo
characteristics which are constant from call to call. Basically if the
bulk of the echo you are experiencing is occurring somewhere between
your FXO card and the exchange, then this should help. If it is
occurring somewhere beyond that, it will be different every time and so
it probably won't be useful to do any form of preloading.

James