GE Multinet 4 Instruction Manual page 239

CHAPTER 7: TERMINAL SERVER APPLICATION NOTES
Note
MULTINET4 MULTI-PORT SERIAL SERVER & MANAGED SWITCH – INSTRUCTION MANUAL
When serial port S1 is UP on each unit, a TCP connection is established between the two.
Confirmation of the connection is illustrated in the figure below.
After the connection is established, the computer system acting as a terminal can
communicate with the RTU through its local serial port.
When creating a TCP/IP tunnel between two serial ports, you should always choose one
node to be the client (the "OUT" channel) and the other to be the server (the "IN" channel).
Configuring a client and a server for the port on each side will result in redundant TCP
connections and each serial port will end up seeing "duplicate" characters.
TERMINAL SERVER APPLICATION NOTES
FIGURE 7–7: TCP Connection Established
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