File 99-moxa_uport.rules of Package moxa

# create /dev/ttyUSBx device links for /dev/ttyMXUSBx
# only correct when no other ttyUSBx exists, otherwise the link will not succeed
# we could use dynamic numbering here, but this is against the intended usage

KERNEL=="ttyMXUSB*", SYMLINK+="ttyUSB%n"