Udp Mode; Pair Connection Mode; Ethernet Modem Mode - Moxa Technologies NPort 5200A Series User Manual

NPort 5200A Series

UDP Mode

Compared to TCP communication, UDP is faster and more
efficient. In UDP mode, you can unicast or multicast data
from the serial device to one or multiple host computers, and
the serial device can also receive data from one or multiple
host computers, making this mode ideal for message display
applications.

Pair Connection Mode

Pair Connection Mode employs two NPort 5200A in tandem, and can be used to remove the 15-meter distance
limitation imposed by the RS-232 interface. One NPort 5200A is connected from its RS-232/422/485 port to the
COM port of a PC or other type of computer, such as hand-held PDAs that have a serial port, and the serial
device is connected to the RS-232/422/485 port of the other NPort 5200A. The two NPort 5200A are then
connected to each other with a cross-over Ethernet cable, both are connected to the same LAN, or in a more
advanced setup, they communicate with each other over a WAN (i.e., through one or more routers). Pair
Connection Mode transparently transfers both data and modem control signals (although it cannot transmit the
DCD signal) between the two NPorts.

Ethernet Modem Mode

Ethernet Modem Mode is designed for use with legacy operating systems, such as MS-DOS, that do not support
TCP/IP Ethernet. By connecting one of the NPort 5200A's serial ports to the MS-DOS computer's serial port, it
is possible to use legacy software originally designed to transmit data via modem, but now transmit the data
over the Ethernet.
Choosing the Proper Operation Mode
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