[asterisk-users] fxotune unable to set impedence

[Yuan LIU]

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