Specifications

Digium, Inc.
I have echo problems on my FXO modules and I've trie
echo cancellation algorithms in dahdi_config.h, tried tw
gains, and still nothing works. What can I do?
Run the fxotune utility with the -i option (fxotune -i 4). It s
which DAHDI channels are FXO modules and tune them a
warned however, it takes a significant amount of time for e
tune. A conservative estimate would be somewhere around 2-
for each module. You only have to tune the channels once
The fxotune utility will store the calibration settings in /etc
You will need to configure your system to run fxotune wit
(fxotune -s) during the Linux boot sequence in order to in
previously discovered values which are stored in fxotune.
recommendation is to put ‘fxotune -s’ in your distribution’
at some point after the DAHDI module loads and before Aste
executes.
Note: The digit after the -i option is the digit that will br
on the line.
There is a slight echo. How can I adjust the sound qua
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