NPort 6000 Series
Introducing Serial Port Operation Modes
4-6
Pair Connection and Secure Pair Connection
Modes
In Pair Connection mode, two NPort 6000 servers work together to remove the 15-meter distance limitation
imposed by the RS-232 interface. One server is arbitrarily designated the “master” and the other as the
“slave”—it does not matter which is which as long as there is one of each. One server is connected from its
RS-232 port to the COM port of a PC or another type of computer, such as a hand-held PDA that has a serial port;
the other server is connected to the serial device through its RS-232 port.
The two servers are then connected to each other over the network.
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 the properly configured NPort 6000 serial port to the MS-DOS computer’s serial
port, it is possible to use legacy software to transmit data over the Ethernet when the software was originally
designed to transmit data over a modem.
