User manual

Chapter 1 Overview
1.1 Introduction
To create reliability in your network, the EKI-2748FI comes equipped with a proprietary
redundant network protocol—X-Ring that was developed by Advantech, which
provides users with an easy way to establish a redundant Ethernet network with ultra
high-speed recovery time less than 10 ms.
Aside from 4 x 10/100/1000Base-T(X) Fast Ethernet ports, the EKI-2748FI come
equipped with 4 SFP (mini-GBIC) fiber optic ports. Traditional RJ-45 ports can be used
for uplinking wide-band paths in short distance (< 100 m), while the SFP slots can be
used for the application of wideband uploading and long distance transmissions to fit
the field request flexibility. Also, the long MTBF (Mean Time Between Failures)
ensures that the EKI-2748FI will continue to operate until a Gigabit network
infrastructure has been established, without requiring any extra upgrade costs.
1.1.1 The SFP Advantage
The EKI-2748FI’s four SFP fiber slots provide a lot of flexibility when planning and
implementing a network. The slots can accept any SFP-type fiber transceivers and
these transceivers are designed for transmitting over distances of either 500m (multi-
mode), 10km, 30km, 50km, 70km or 110km (single-mode) – and the slots support SFP
transceivers for WDM single-fiber transmissions. This means that you can easily
change the transmission mode and distance of the switch by simply pulling out the
SFP transceiver and plugging in a different one. The SFP transceivers are hot-
swappable and plug-and-play! Also, the fact that the switch has four of these slots,
means that the network manager can, for example, have one 10km transceiver in one
slot and one 110km in the other.
1.1.2 SFP with DMI Function
The SFP supports DMI (Digital Monitoring Interface) function which allows real-time
access to device operating parameters, and includes optional digital features such as
soft control and monitoring of SFP I/O signals. In addition, you can set up the action of
alarms and warnings by ports to manage your device.
1.1.3 High-Speed Transmissions
The EKI-2748FI includes a switch controller that can automatically sense transmission
speeds (10/100 Mbps). The RJ-45 interface can also be auto-detected, so MDI or MDI-
X is automatically selected and a crossover cable is not required. All Ethernet ports
have memory buffers that support the store-and-forward mechanism. This assures that
data is properly transmitted.
1.1.4 Dual Power Inputs
To reduce the risk of power failure, the EKI-2748FI provides +12 ~ 48 V
DC
dual power
inputs. When one of the power inputs fails, P-Fail LED will turn on and send an alarm
through a relay output for notifying the user; and the switch will toggle to the secondary
power input.
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