User manual Version 1.1
SE5408/SE5416 Multi-port
Serial Server
Copyright © 2010 ATOP Technologies, Inc.
All rights reserved. Designed in Taiwan
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Appendix A. Virtual COM Setup
In the Virtual COM setup, ATOP’s software “Serial-IP” emulates a remote serial port on a host computer.
The emulated port is called the “Virtual COM port”. The maximum number of Virtual COM ports supported
by “Serial-IP” is 4096.
Fig 56 illustrates a Virtual COM connection diagram. On the right of the diagram, there are four serial
devices physically plugged into the first four serial ports of the SE5408/SE5416 Multi-Port Serial Server
device. On the left is a host computer connected to the device’s LAN1 via a CAT 5 cable which runs on
socket mode.
Note: If the host computer has two “physical” COM ports (COM1 and COM2), the virtual COM
begins with COM3.
Fig 56. Virtual COM Connection Diagram
Once the “Serial-IP” program is called up, COM3, COM4…COM4096 ports appear on the screen, each
can be assigned to a physical serial device. Since we have only four serial devices, four virtual COM ports
COM3 - COM6 are used, each of which correspond to one of the four serial devices are selected. Since
all four serial devices are communicating with the host computer via the same LAN1, the data must be
multiplexed, each assigned with a different TCP port number: 4660, 4661, 4662, and 4663.
It is important to note that the TCP port numbers (4660…4663) are unique and are used to “map” a virtual
port on the host computer to a COM port (plug) on the SE5408/SE5416 Multi-Port Serial Server.
Note: Many newer computers do not have any “physical COM” port. A USB-to-serial driver must
be installed to use a USB port to “simulate” a COM port on the computer.
A.1. Minimum System Requirements
Processor: Intel-compatible, Pentium class
Operation system: Windows Server 2003, Windows XP, Windows 2000, Windows NT 4.0 SP5
or later, Windows Me, Windows 98, Windows 95, Microsoft NT/2000 Terminal Server, Citrix
Meta Frame
Windows Installer 2.0
Network: Microsoft TCP/IP networking software (only for the older OS’s)
