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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Operating Modes
The SE5008/5016 series can function as:
1) TCP Server (Virtual COM included)
2) TCP
Client
3) Tunneling Mode (Client-Server Pair)
SE5408/5416 can either function as a “TCP server” or as a “TCP Client” at a time with a unique IP
address and Port number. When acting as a TCP server, it waits and “listens” passively for any request
from a host computer to establish a connection with the serial device. After the connection is established,
data can then flow in both directions at the same time. This is a preferred mode for most the network
administrators because it lessens the workload of the host computer.
Tunneling Mode utilizes two server ports, one acting as a server, one acting as a client, working back to
back to establish a simulated serial connection.
TCP Server Mode
The SE5408/SE5416 Multi-Port Serial Server series is designed to transmit data among multiple serial
devices via TCP/IP (or UDP/IP) on Ethernet netowrk, and hence greatly enhances the accessibility of the
serial devices. Fig 5 shows a SE5408/SE5416 Multi-Port Serial Server functioning in TCP Server mode
and the host computer is trying to establish a TCP/IP connection on the Ethernet network.
Fig 5. SE5416 in TCP Server Mode is listening for a request from a computer to connect to Serial
devices
Fig 6 shows the device’s LAN1 interface is connected to the main host computer and LAN2 interface to
the backup host computer. The connections are made over two different subnet networks. A set of 16
serial devices can be connected through a locally connected computer or a remote monitor via the
Internet.
