pbx ~ # fxotune
Usage: fxotune [-v[vv] (-s | -i <options> | -d <options>)
-s : set priviously calibrated echo settings
-i : calibrate echo settings
options : [<dialstring>] [-t <calibtype>]
[-b <startdev>][-e <stopdev>]
[-n <dialstring>][-l <delaytosilence>][-m <silencegoodfor>]
-d : dump input and output waveforms to ./fxotune_dump.vals
options : [-b <device>][-w <waveform>]
[-n <dialstring>][-l <delaytosilence>][-m <silencegoodfor>]
-v : more output (-vv, -vvv also)
<calibtype> - type of calibration
(default 2, old method 1)
<startdev>
<stopdev> - defines a range of devices to test
(default: 1-252)
<dialstring> - string to dial to clear the line
(default 5)
<delaytosilence> - seconds to wait for line to clear (default 0)
<silencegoodfor> - seconds before line will no longer be clear
(default 18)
<device> - the device to perform waveform dump on
(default 1)
<waveform> - -1 for multitone waveform, or frequency of
single tone (default -1)