My SM56 (Motorola X100P clone) has echo as hight as 38%, according to fxotune -d. But when trying to take action, it fxotune simply says it can't.

./fxotune -i3 -vvvv
Running with parameters:
       doset=0
       docalibrate=1
       dodump=0
       startdev=1
       stopdev=252
       calibtype=2
       waveformtype=-1
       delaytosilence=0
       silencegoodfor=18
       dialstr=5
       debug=4
Tuning module /dev/zap/1
Unable to set impedance on fd 4
Failure!
------------------

How can I fix this? Or does fxotune only tune TDM400? (My TDM400P shows a mere 1.2% echo.) Could it do "authentic" X100P?

I use zaptel-1.2.10, fxotune.c Rev. 1348.

Yuan Liu


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