[Asterisk-Users] How to ensure that software echo cancellation ison?

[Michael D Schelin]

Thanks Rich, seems other things are now working for me as well. good FYI!

Rich Adamson wrote:

>>Problem solved.
>>
>>this zapata.conf works (i.e echo is gone, echo cancellation is detected 
>>on "zap show channel"):
>>context=from-pstn
>>switchtype = national
>>signalling = pri_cpe
>>echocancel=yes
>>echotraining=500
>>echocancelwhenbridged=yes
>>faxdetect=incoming
>>group = 0
>>channel => 1-8
>>
>>this zapata.conf has echo cancellation not work:
>>context=from-pstn
>>switchtype = national
>>signalling = pri_cpe
>>group = 0
>>channel => 1-8
>>echocancel=yes
>>echotraining=500
>>echocancelwhenbridged=yes
>>
>>And if I add "faxdetect=incoming" as the last line in that one, asterisk 
>>doesn't even start.  I get the "Ouch" message and asterisk crashes.
>>
>>Lesson learned: the order in which lines appear in zapata.conf does matter.
>>Questions to be asked:  is that expected behavior? is it documented 
>>somewhere?
> 
> 
> Yes. For the most part, the "order" of the statements does not make
> any difference. However, what you've learned from above is not the
> order at all; its that your echo statements were not stated before
> the channel => 1-8 statement.
> 
> In other words, had those echo statements been included prior to the
> channel statement (as in your working cofig), the order within the 
> channel definition "section" is irrelavent.
> 
> 
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