Advantech EDG-4508, Руководство пользователя

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10 EDG-4508/4516 User's Manual
If you use the type of application described in the previous paragraph,
EDG-4508/4516 with its Ethernet connection is the best solution avail-
able for adding RS-232 serial devices to your computer. It allows you to
extend the range of your operation, increase the number of ports used,
and provides high throughput. The installation procedure is as simple as
installing a traditional multi-port serial board. You don’t have to spend a
lot of time learning advanced networking concepts to configure EDG-
4508/4516 . The least you will need to do is install an Ethernet card in
your computer.
Figure 2-2. Single-Host Mode using two EDG-4508/4516
Multi-Host Mode
For advanced applications you may share one EDG-4508/4516 with mul-
tiple hosts on a Local Area Network (LAN). Unlike serial devices bun-
dled to a dedicated host, sharing one EDG-4508/4516 with several com-
puters saves resources, since you no longer need to add multi-port serial
boards to each computer. Figure 2-3 shows the basic concept of the
Multi-Host application.
For example, let’s assume that you have three hosts on the same net-
work, and each host requires 5 serial ports to communicate with five
serial devices. All you need to do is install one 16 port EDG-4508/4516 ,
and connect 5 ports to each of the three hosts. In some types of applica-
tions, such as a modem pool, or other RS-232 device pooling situations,