Usage:
%s
[OPTION...]
Options:
-h, --help Show this help message
-v, --version Print version information
-r, --cleanup Remove stale socket file (left by accident by
previous run)
-d, --debug[=level] Print additional runtime debugging data to stdout
level = 1..2
-i, --soundin=DEVICE OSS compatible device for input (recording),
default: /dev/dsp
-o, --soundout=DEVICE OSS compatible device for output (playback),
default: /dev/dsp
-m, --msn=MSN identifying MSN (for outgoing calls), 0 for master
MSN of this termination/port
default: 0
-l, --msns=MSNS MSNs to listen on, semicolon-separated list or '*'
default: *
-c, --call=NUMBER Call specified number
Note: If arguments of --soundin and --soundout are equal, a full duplex
sound device is needed.