Table 6
                   Serial device files for use with modems

 System  Device files                      Description
 -------------------------------------------------------------------------
                      X is the number representing the card instance and N
         /dev/ttydXpN is the number representing the port. Used for
                      incoming conections, e.g. dialing in on a modem.
                      X is the number representing the card instance and N

 HP-UX   /dev/culXpN  is the number representing the port. Used for
                      outgoing connections, e.g. dialing out on a modem.
                      X is the number representing the card instance and N

         /dev/cuaXpN  is the number representing the port. Used for direct
                      connections, e.g. when debugging a modem connection.
 -------------------------------------------------------------------------
         /dev/ttymN   N is the number representing the port. Used for low
                      speed modems.
 IRIX
         /dev/ttyfN   N is the number representing the port. Used for high
                      speed modems, hardware flow control is enabled.
 -------------------------------------------------------------------------
         /dev/ttySN   The N is the number representing the port. Used for
                      incoming connections, e.g. dialing in on a modem.
 Linux
         /dev/cuaN    The N is the number representing the port. Used for
                      outgoing connections, e.g. dialing out on a modem.
 -------------------------------------------------------------------------
         /dev/term/A  A is the letter representing the port. Used for
                      incoming connections, e.g. dialing in on a modem.
 Solaris
         /dev/cua/A   The A is the number representing the port. Used for
                      outgoing connections, e.g. dialing out on a modem.