and practically, now asterisk is run with '-G asterisk' option, eg ONLY with
group asterisk and not other ones; but udev default rule assign /dev/ttyUSB*
to 'dialout' group.
Before the '-G' options, would be suffices to have 'asterisk' user member
of 'dialout' group.
Now the approach seems to hav an udev rule that match USB dongle, and assign
them to 'asterisk' group.
Someone ahve some just ready rule? Or some better idea?