NPort 6000 Series Introducing Serial Port Operation Modes
Reverse Real COM Mode
Real COM mode will not work when the NPort 6000 is using a private IP address, or if the NPort 6000 is in a
dynamic IP address environment. In either of these cases, the remote host/server will not be able to connect
to the NPort 6000.
Private IP address application
Dynamic IP address application
Reserve Real COM mode is an innovative operation mode developed by Moxa. It allows NPort 6000 terminal
servers to achieve the same effect as Real COM mode, but without needing to apply for a public IP address. In
other words, Reverse Real COM mode can be used even if the NPort is using a private IP address, or is being
used in a dynamic IP address environment.
In Reserve Real COM mode, the NPort 6000 will actively initiate a connection to the remote host/server that is
listed in the destination IP field after it boots up.
RFC2217 Mode
RFC-2217 mode is similar to Real COM mode. That is, 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 6000 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 RFC-2217 are widely available on the Internet and can be used to implement Virtual
COM mapping to your NPort 6000 serial port(s).