Dahdi Gains

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Hi, I’m trying to find the differences between the two CLI gain parameters of DAHDI : “dahdi set swgain” and “dahdi set hwgain”. When I change one of these parameters the output of :
asterisk -rx “dahdi show channel X” | grep Gains don’t show me any changes.

Did “dahdi show channel X” shows HW or SW Gains ?
Whan I set rxgain and txgain in my chan_dahdi.conf file, is it a HW or SW gain ?

Thanks in advance, Sil

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