DESCRIPTION
 The 
ucom driver attaches to USB modems, serial ports, and other devices that need to look like a tty. The 
ucom driver shows a behaviour like a 
tty(4). This means that normal programs such as 
tip(1) or 
pppd(8) can be used to access the device.
The portno locator can be used to decide which port to use for device that have multiple external ports.