Rfc2217 Mode; Tcp Server Mode - Moxa Technologies NPort 5000 Series User Manual

ATTENTION
The driver used for Real COM Mode is bundled with NPort Administrator. The driver is installed on your
computer automatically when you install NPort Administration Suite.
One of the major conveniences of using Real COM Mode is that 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 NPort accepts the
Ethernet frame, unpacks the TCP/IP packet, and then sends it transparently to the appropriate serial device
attached to one of the NPort's serial ports.
ATTENTION
Real COM Mode allows several hosts to access the same NPort. The driver that comes with your NPort
controls host access to attached serial devices by checking the host's IP address. Refer to the Accessible
IP Settings section in Chapter 2 for details.

RFC2217 Mode

RFC2217 Mode is only supported by the NPort 5000A, NPort 5000AI-M12, NPort IA5000A, NPort
5600, and NPort 5600-8-DT/DTL Series.
RFC 2217 mode is similar to Real COM mode in that a driver is used to establish a transparent connection
between a host computer and a serial device by mapping the serial port on the NPort to a local COM port on
the host computer. RFC2217 defines general COM port control options based on the Telnet protocol. Third
party drivers supporting RFC2217 are widely available on the Internet and can be used to implement Virtual
COM mapping to your NPort serial port(s).

TCP Server Mode

In TCP Server Mode, the NPort is configured with a unique
IP:Port combination on a TCP/IP network. In this case, the
NPort waits passively to be contacted by the host computer.
After the host computer establishes a connection with the
serial device, it can then proceed with data transmission.
TCP Server mode also supports up to 4 simultaneous
connections, so that multiple hosts can collect data from the
same serial device—at the same time. As illustrated in the
figure, data transmission proceeds as follows:
1. The host requests a connection from the NPort
configured for TCP Server Mode.
2. Once the connection is established, data can be
transmitted in both directions—from the host to the
NPort, and from the NPort to the host.
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