Moxa Technologies NE-4100 - Manual (Page 30)

NE-4100 Series User’s Manual Choosing the Proper Operation Mode
4-4
Real COM Mode
NE-4100 Series boards come equipped with
COM drivers that work with Windows
95/98/ME/NT/2000/XP systems. The driver
establishes a transparent connection
between host and serial device by mapping
the IP:Port of the NE-4100 Series boards’
serial port to a local COM port on the host
computer.
The driver used for Real COM Mode comes with the NE-4100 Series Windows Administrator
which is installed automatically on your computer when you install the NE-4100 Series
Administration Suite.
Real COM Mode allows users to continue using RS-232/422/485 serial communications software
that was written for pure serial communications applications. The driver intercepts data sent to the
host’s COM port, packs it into a TCP/IP packet, and then redirects it through the host’s Ethernet
card. At the other end of the connection, the NE-4100 Series boards accept the Ethernet frame,
unpack the TCP/IP packet, and then transparently send it to the appropriate serial device attached
to the NE-4100 Series boards’ serial port.
Real COM Mode allows several hosts to have access control of the same NE-4100 Series board. The
Moxa driver that comes with your NE-4100 Series controls host access to attached serial devices by
checking the host’s IP address.
Modify the Accessible IP Setting table when a public IP address is required for your application.