Item Notes Description
The number of serial ports varies depending on the model you
purchased.
Operation
Mode
Disabled by default The current operation mode for the serial interface.
Depending on the model you purchased, the available modes
are: Virtual COM, Modbus, or IEC 60870-5
Interface Default setting: RS-
232
Select RS-232 as the physical interface for connecting to access
device(s) with the same interface specification.
Baud Rate Default setting: 19200 Select the appropriate baud rate for serial device
communication.
RS-232: 1200 / 2400 / 4800 / 9600 / 19200 / 38400 / 57600 /
115200
Data Bits Default setting: 8 Select 8 or 7 for data bits.
Stop Bits Default setting: 1 Select 1 or 2 for stop bits.
Flow Control Default setting: None Select None, RTS, CTS, DTS or DSR for Flow Control in RS-232
mode.
Flow Control may not be supported depending on the model
you have purchased.
Parity Default setting: None Select None, Even or Odd for Parity bit.
Action Button Click Edit to change the operation mode, or modify the
parameters mentioned above for the serial interface
communication.
Save Button Click Save button to save the settings.
Undo Button Click Undo to cancel the changes to settings.
Table 128 – Serial Port settings
5.1.2 Virtual COM
Create a virtual COM port on user’s PC/Host to provide access to a serial device connected to the serial port on the router.
Once set up, users can access, control, and manage the connected serial device through Internet (fixed line, or cellular
network) anywhere. This application is also known as Ethernet pass-through communication.
Virtual COM setting screen enables user to connect a Virtual COM port based device to the Internet using one of four modes:
TCP Client, TCP Server, UDP, and RFC-2217
Figure 221 – Virtual COM Serial Port Operation Mode Selector
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