Nokia-N900:~# pnatd --help pnatd: invalid option -- - Usage: pnatd [/dev/<tty_device_name> | -p] [-r] Open a TTY line and handle AT commands from it using Phonet. -h print this help and exit -p create a pseudo-terminal instead of opening an existing terminal -r restart whenever the terminal is hung up (until fatal error) -V print version informations and exit