User`s manual

3-20 Intellio C218Turbo User's Manual
MOXA TTY Device Naming Convention
If the C218Turbo is successfully configured, there will be two tty devices created
for each port at /dev directory: one is non-MODEM tty (e.g. ttya11), and the other
is MODEM tty (e.g. ttyA11). The two devices are actually accessing the same port
except that the MODEM tty has to check the ON status of DCD signal to be able to
open device, and closing device automatically as DCD signal is OFF.
The convention of the MOXA tty device name is /dev/tty{a-d}{1}{1-8}, where:
“tty” + “A” + “B” + “C”
Port ordinal number
Always 1
Board ordinal number
“a” or “A”: 1st MOXA board
“b” or “B”: 2nd MOXA board
“c” or “C”: 3rd MOXA board
“d” or “D”: 4th MOXA board
Capitals indicate a MODEM port
Standard tty device prefix
For example:
/dev/ttya11
/dev/ttya12
/dev/ttya13
/dev/ttya14
/dev/ttya15
/dev/ttya16
/dev/ttya17
/dev/ttya18
Opt8A