EW50 Industrial LTE Cellular Gateway
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4.1.2 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 gateway. This will allow access, control, and management of the connected serial device through the
Internet (fixed line or cellular network). This is also known as Ethernet pass-through communication.
The Virtual COM setting screen enables user to connect a Virtual COM port based device to the Internet, so
that serial data can be accessed remotely. There are Disable, TCP Client, TCP Server, UDP, and RFC2217 modes
for remote accessing of the connected serial device.
These operation modes are illustrated below.
TCP Client Mode
When the administrator expects the gateway to
actively establish a TCP connection to a pre-defined
host computer when serial data arrives, the
operation mode for the "Virtual COM" function is
required to be "TCP Client" and when the connection
control of virtual COM is "On-demand", once the
gateway receives data from the connected serial
device, it will establish a TCP connection to transfer
the received serial data to the remote host. After the
data
has
been
transferred,
the
gateway
automatically disconnects the established TCP
session from the host computer by using the TCP
alive check timeout or idle timeout settings.
