[asterisk-users] Extremely choppy sound on some of ourPOTSnetwork calls; goes away with mute

[Noah Miller]

>>> You can also change some settings in the zapta and zaptel
>>> config.. to reduce
>>> echo and interference on the line..
>>
>> This is the most important thing here - what does your zapata.conf look
>> like?
>>
>  zapta.comf
>  switchtype=national

This is not necessary in your case.  It pertains to PRI lines, and not
the POTS lines you have.


>  echocancel=yes
>  echotraining=yes
>  echocancelwhenbridged=yes

You may want to turn each of these off, in turn, for testing,
especially the "echocancewhenbridged".

You can also tune the "echocancel" setting in terms of taps (a tap is
one sample from the data stream per second).   You can use the values:
16, 32, 64, 128, or 256 ('yes' just means 128).


- Noah