Moxa Technologies INTELLIO C218 - Manual (Page 45)

Software Installation
Intellio C218Turbo /PCI User's Manual 3-27
MOXA TTY Device Naming Convention
If the
Intellio C218Turbo/PCI 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 physical 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:
T
x R
x
/dev/ttya11
/dev/ttya12
/dev/ttya13
/dev/ttya14
/dev/ttya15
/dev/ttya16
/dev/ttya17
/dev/ttya18
Opt8A