
Installation Manual
INTRODUCTION
Page 3
1.1 System overview
The figure below gives an overview of where the Dupline-Online Server fits, how the Dupline® Data Logger
can communicate with the Dupline-Online Server and how users can access the web pages provided by the
Dupline-Online Server.
LAN
GSM
modem
RS-232
RS-232
Ethernet
Internet
Firewall
A
B
B
C
F
RS-232
C
D
E
F
User
MOXA
NPort
MOXA
NPort
Dupline-Online
Server
• A – Dupline-Online Server
The server running the Dupline-Online Server software and Microsoft SQL Server (MSDE).
• B & C – Serial to Ethernet converter and Dupline Data Logger
As the figure shows, the Dupline-Online Server can communicate with the Dupline Data Logger over
either a LAN (local area network) or over the Internet.
• D & E – Dupline Data Logger with GSM modem and server GSM modem
When using GSM modem, the Dupline-Online Server communicates with the Dupline Data Logger by
sending and receiving SMS messages. The GSM modem can also be used to send alarm messages.
• F - User
User browsing the web pages provided by the Dupline-Online Server.
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