Ovislink Ether-GSH4T User manual

Ether-GSH4T Ether-GSH4T Ether-GSH4T Ether-GSH4T Ether-GSH4T
Ether-GSH4T Ether-GSH4T Ether-GSH4T Ether-GSH4T Ether-GSH4T Ether-GSH4T
Ether-GSH4T Ether-GSH4T Ether-GSH4T Ether-GSH4T Ether-GSH4T
Ether-GSH4T Ether-GSH4T Ether-GSH4T Ether-GSH4T Ether-GSH4T Ether-GSH4T
Ether-GSH4T Ether-GSH4T Ether-GSH4T Ether-GSH4T Ether-GSH4T
Ether-GSH4T Ether-GSH4T Ether-GSH4T Ether-GSH4T Ether-GSH4T Ether-GSH4T
Ether-GSH4T
All Gigabit Ethernet Switch
4 × 1000Base-TX Gigabit ports
NWay 10/100/1000BASE-TX
Smart All Gigabit Ethernet Switch
with VLAN, Priority, Broadcast Storm Control and port-mirror Function
User’s Manual
Ether-GSH4T V.1.0
August 1, 2002
Copyright © OvisLink Corp.

Trademarks
All rights reserved.
OvisLink and OvisLink Logo are registered trademarks of OvisLink Corp. Other product
names and company names are trademarks or registered trademarks of their respective
owners.
FCC Warning
This equipment has been tested and found to comply with the requirements for a Class A
digital device, pursuant to Part 15 of the FCC Rules. These requirements are designed for
reasonable protection against harmful interference when the equipment operating in a
commercial environment. This equipment can generate and radiate electromagnetic energy
and, if not installed and used in accordance with this guide, may cause significant
interference with radio communication. Operation of this equipment in a residential area is
likely to cause interference to household appliances, in which case the user will be required
to amend at his or her own expense.
CE Mark Warning
This is a Class A product. In a domestic environment, this product may cause radio
interference, in which case the user may be required to take adequate preventive measures.
Disclaimer
Contents in this manual are subject to changes without prior notice.

About
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This User’s Manual aims at helping users to know the key features of
Ether-GSH4T Gigabit Ethernet Switch and to install it in a
10/100/1000BASE-TX Gigabit Ethernet Local Area Network (LAN).

Table of Contents
i
Ether-GSH4T Gigabit Ethernet Switch
Table of Contents
TABLE OF CONTENTS........................................................................................ I
PRODUCT OVERVIEW ....................................................................... 1
Introduction ....................................................................................................................... 1
4× 1000Base-TX port Gigabit Ethernet Switch with VLAN, Priority, Broadcast Storm
Control, and Port Mirroring Capability........................................................................... 1
Port-based VLAN for Instant Connectivity and Workgroup Privacy............................. 1
4-level Priority Queuing for Class of Service (CoS)....................................................... 1
Port Configuration via Smart Console ............................................................................ 1
Best solution for Server Farm or Gigabit backbone switch ............................................ 2
Broadcast Storm Control................................................................................................. 2
Store-and-Forward Architecture against Packet Loss..................................................... 2
Active Flow Control........................................................................................................ 2
Non-blocking Wire Speed............................................................................................... 2
System/Port Status Information at a Glance ................................................................... 2
VLAN, Priority and Port-Mirroring Configuration through Console Port ................ 3
What is VLAN? ................................................................................................................. 3
Defining VLAN............................................................................................................... 3
Port-based VLAN............................................................................................................ 3
Table Maintenance via Signaling.................................................................................... 3
802.1q VLAN Standard................................................................................................... 4
What is Priority Queuing? ............................................................................................... 4
What’s Port Mirroring? ................................................................................................... 4
What’s Broadcast Storm Control .................................................................................... 4
Why Migrate to Gigabit Networking? ............................................................................ 4
Product Features ............................................................................................................... 6
Basic Features ................................................................................................................. 6
Advanced Features .......................................................................................................... 6

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Ether-GSH4T Gigabit Ethernet Switch
PREPARATION BEFORE INSTALLATION ........................................ 8
Unpack the Package .......................................................................................................... 8
The Front Panel.................................................................................................................9
The Rear Panel ..................................................................................................................9
Power Switch................................................................................................................... 9
AC Power Connector ...................................................................................................... 9
Console Port .................................................................................................................. 10
Ventilators........................................................................................................................ 10
INSTALLATION OF THE SWITCH.................................................... 12
Quick Installation............................................................................................................ 12
3 Steps to Quick Installation ......................................................................................... 12
Why Copper-wired Gigabit Connection? ..................................................................... 12
Rack Mounting ................................................................................................................ 13
Desktop Installation ........................................................................................................ 13
Installation Site Preparation .......................................................................................... 14
Cabling Requirements .................................................................................................... 14
RJ-45 station port cable requirements:.......................................................................... 15
Straight-through cabling requirements.......................................................................... 15
Crossover cabling requirements .................................................................................... 16
1000BASE-T cabling requirements .............................................................................. 16
Connecting to Power ....................................................................................................... 17

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Ether-GSH4T Gigabit Ethernet Switch
EXPANDING YOUR NETWORK ....................................................... 18
Connectivity Rules........................................................................................................... 18
10 Mbps Connection (10BASE-T)................................................................................ 18
Copper-wired 100/1000 Mbps Connection (100/1000BASE-T) .................................. 18
Connecting to another Switch/Hub ............................................................................... 19
Straight-through Cable Connection............................................................................... 19
RJ-45 Station Port Description...................................................................................... 19
RJ-45 Gigabit Port Description ..................................................................................... 20
Summary: ...................................................................................................................... 20
Copper-wired Gigabit Connection ................................................................................ 20
Connecting via Console Port to Host PC ...................................................................... 21
Summary ....................................................................................................................... 21
Transmission Modes ....................................................................................................... 22
Copper-wired Gigabit ports (1000BASE-T Transmission) .......................................... 22
Centralized Server Farms .............................................................................................. 22
Gigabit Backbone Connections ...................................................................................... 23
Benefits of VLAN ............................................................................................................ 23
Advantage of VLAN Switching over Routing.............................................................. 23
Virtual Workgroups....................................................................................................... 23
Higher Performance and Reduced Latency................................................................... 24
Ease of Administration.................................................................................................. 24
Saving Costs.................................................................................................................. 24
Security.......................................................................................................................... 24
Reduction of Routing for Broadcast Containment........................................................ 24
Infrastructural VLANs .................................................................................................. 24
LED INDICATORS............................................................................. 26
Comprehensive LEDs ..................................................................................................... 26

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Ether-GSH4T Gigabit Ethernet Switch
System LED .................................................................................................................. 26
Diagnostic LEDs ........................................................................................................... 26
Station Port LEDs.......................................................................................................... 26
Power LED.......................................................................................................................27
Diagnostic LEDs .............................................................................................................. 27
BCST/DIAG LED......................................................................................................... 27
Gigabit Port LEDs (for Port #1 ~ 4) .............................................................................. 27
10M/100M/1000M Link/Act LED................................................................................ 27
FDX/COL LED ............................................................................................................. 27
LED Summary Table ...................................................................................................... 28
CONFIGURING SMART MANAGEMENT FUNCTIONS ...................... 29
Making RS-232 Cable Connection to the Host PC....................................................... 29
Using Windows HyperTerminal for Smart Configuration of VLAN, Priority and
Port-Mirroring ................................................................................................................ 30
Run Windows HyperTerminal utility............................................................................ 30
Hot Keys ........................................................................................................................... 33
Port Status........................................................................................................................ 33
Port Configurations......................................................................................................... 34
Port Mirror Configurations ........................................................................................... 36
VLAN Configurations..................................................................................................... 37
Create a VLAN Group .................................................................................................. 38
Add/Remove a port to a VLAN Group ......................................................................... 38
Separate VLAN groups ................................................................................................. 39
Overlapping VLANs ..................................................................................................... 39
Miscellaneous Configurations ........................................................................................ 40
Reset the Device to Default Setting................................................................................ 40

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Ether-GSH4T Gigabit Ethernet Switch
VLAN CONFIGURATION BASICS....................................................... 42
Scenario: Setting up 3 Separate VLANs sharing 1 Server .......................................... 42
Procedures: .................................................................................................................... 42
APPENDIX A PRODUCT SPECIFICATIONS.................................................. 44
APPENDIX B TROUBLESHOOTING .............................................................. 46

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Ether-GSH4T Gigabit Ethernet Switch
Figures
Fig. 2-1 Package Contents............................................................................................... 8
Fig. 2-2 RS-232 Cable for Console connection .............................................................. 9
Fig. 2-3 Front Panel......................................................................................................... 9
Fig. 2-3 Rear Panel........................................................................................................ 10
Fig. 2-4 Console Port .................................................................................................... 10
Fig. 2-5 Cooling Fan housed within fan tray ................................................................ 11
Fig. 3-2 Fastening the brackets on the switch ............................................................... 13
Fig. 3-3 Attaching the Switch to a 19-inch rack ........................................................... 13
Fig. 3-4 Desktop installation ......................................................................................... 14
Fig 3-5 10/100/1000BASE-T pin assignments for RJ-45 connector ........................... 15
Fig 3-6 Pin assignments for straight-through cabling ................................................. 16
Fig 3-7 10/100BASE-TX pin assignments for crossover cabling................................. 16
Fig 3-8 Connecting the Switch to power outlet............................................................. 17
Fig. 4-1 Connecting two switches ................................................................................. 19
Fig. 4-2 Pin assignments of crossover cabling for 10/100BASE-TX ......................... 19
Fig. 4-3 Straight-through/crossover cabling for 10/100BASE-TX.............................. 20
Fig. 4-4 Using twisted-pair cables to connect the copper-wired gigabit ports.............. 21
Fig. 4-5 Connecting to the host PC via console port..................................................... 21
Fig. 4-6 Server Farm ..................................................................................................... 22
Fig 4-7 Gigabit Switch Bone......................................................................................... 23
Fig. 5-1 Front-panel LED indicators ............................................................................ 26
Fig. 6-1 RS-232 Cable................................................................................................... 29
Fig. 6-2 Console Port .................................................................................................... 29
Fig. 6-3 RS-232 Cable................................................................................................... 30
Fig 7-1 VLAN Example................................................................................................ 42
Tables
Table 3-1 Using straight-through and crossover cables ................................................ 15
Table 3-2 1000BASE-T pin assignments for RJ-45 connector..................................... 16
Table 4-1 1000BASE-T pin assignments for RJ-45 connector.................................... 20
Table 5-1 Station Port LEDs ......................................................................................... 28

1 Product Overview
1
Ether-GSH4T Gigabit Ethernet Switch
Product Overview
Introduction
4× 1000Base-TX port Gigabit Ethernet Switch with VLAN, Priority,
Broadcast Storm Control, and Port Mirroring Capability
Ether-GSH4T Gigabit Ethernet Switch is an auto-sensing and auto-negotiating Gigabit Ethernet
Switch with VLAN, ,Priority, Port-Mirroring, and Broadcast Storm Control capability. Its four
10/100/1000Mbps Gigabit ports provide 10/100/1000Mbps connections to the server group and
gigabit switches
Ether-GSH4T’s unique switching fabric provides non-blocking full wire speed for all ports. For
conventional uplinking to another switch/hub using ordinary straight-through cable, it also provides
one Uplink port (shared with port #1). Each port provides up to 2000Mbps in full duplex mode.
With its auto-sensing, Ether-GSH4T automatically detects the speed of the devices you plug into,
and routes the incoming data to its destination. Its auto-negotiating function allows existing devices
running at different speeds to communicate easily within the same network.
Port-based VLAN for Instant Connectivity and Workgroup
Privacy
Ether-GSH4T supports up to 4 port-based VLAN groups. VLAN can ensure instant connectivity
and workgroup privacy. Since each station port can be configured to whichever VLAN group, it
offers utmost flexibility for workgroup assignment as to ensure workgroup privacy. For those ports
that join a VLAN, it offers instant connectivity without further configuration efforts from network
administrator. Members of a same VLAN group will be included within a same broadcast domain,
and will feel exactly as they are on the same network segment (though they might not belong to the
same physical network segment).
4-level Priority Queuing for Class of Service (CoS)
Ether-GSH4T also provides 4-level priority queuing for small-to-medium enterprise networks that
implement regular video conference and voice streaming service. High Priority setting ensures that
traffic with a high priority, such as video and voice data, is propagated with greater urgency than
lower priority traffic.
Port Configuration via Smart Console
VLAN, ,Priority, and Port-Mirroring function of Ether-GSH4T is configurable via the console port.

1 Product Overview
2
Ether-GSH4T Gigabit Ethernet Switch
Before you can utilize console port for VLAN, ,Priority, and Port-Mirroring configuration, you must
connect the console port of Ether-GSH4T to the COM port (RS-232 interface) of the host PC, using
a RS-232 cable. For the detailed information of VLAN, Priority and Port-Mirroring configuration,
please refer to the next section, VLAN, Priority & Port-Mirroring Configuration through Console as
well as Chapter 6, Configuring Smart Management Functions
Best solution for Server Farm or Gigabit backbone switch
Ether-GSH4T Gigabit Ethernet Switch is equipped with 4 Gigabit Ethernet ports. It is most
suited to be used as the backbone switch for Server group or Mixed Gigabit switches
Broadcast Storm Control
The Ether-GSH4T automatically filters out the broadcast traffic when the broadcast packets exceed
5% of the total traffic. Broadcast storm can significantly impede the performance of the network.
The Ether-GSH4T protects your network from such situations.
Store-and-Forward Architecture against Packet Loss
When network is under heavy traffic, the shared memory buffer in the switching devices might yield
incorrect detections due to overfed memory buffer. This setback can happen either when data is
transmitted in IEEE802.3x Full Duplex or Back Pressure Flow Control mode. To solve this problem,
Ether-GSH4T utilizes a fixed memory buffer allocation with Store-and-forward transmission to
ensure an effective buffer allocation for each port.
Store-and-forward transmission controls data flow from transmitting to receiving nodes with the
receiving buffer threshold adjusted to an optimal value, thus guaranteeing against all possible packet
losses.
Active Flow Control
Ether-GSH4T Gigabit Ethernet Switch implements in full duplex mode a flow control that is
compliant to IEEE 802.3x standard. While in half duplex mode, it employs an optional Back
Pressure Flow Control to stall the incoming data when port buffers are saturated. With this flow
control mechanism, it can be ensured that frames dropped during transmission are reduced to a
minimum.
Non-blocking Wire Speed
Ether-GSH4T’s non-blocking cross-bar matrix architecture provides high-end performance for
departmental and workgroup environments at a fraction of the cost of similar devices. Typically,
this type of architecture was found only in high-end switches designed to handle huge corporate
networks. With bandwidth needs and network efficiency concerns, Ether-GSH4T’s switching
fabric design is the perfect answer for solution.
System/Port Status Information at a Glance
There are 2 sets of LEDs on the front panel: System LED and Station port LEDs,. The System LEDs
consist of the Power LED, the BCST(Broadcast Storm Control)/Diag and OvUn_Flow LED.
The station LEDs consist of the 10M Link/Act, 100M Link/Act, 1000M Link/Act, and FDX/Col

1 Product Overview
3
Ether-GSH4T Gigabit Ethernet Switch
VLAN, Priority and Port-Mirroring Configuration through
Console Port
Ether-GSH4T is pre-installed with specific firmware in its nonvolatile flash memory to enable
VLAN, Priority and Port-Mirroring configuration function. Through a RS-232 cable connection via
its console port to the COM port of host PC, Ether-GSH4T allows network administrator to
perform Smart Configuration from the host PC with convenience.
Since smart management configuration is performed through console port instead of within the
Ethernet network, it is thus called the out-of-band network management. The out-of-band network
management also allows extra security since its configuration information is not mingled with the
Ethernet network itself.
For further details concernings Smart Management configuration, please refer to Chapter 6,
Configuring your Network for VLAN, Priority and Port-Mirroring.
What is VLAN?
Defining VLAN
What is VLAN? Since VLAN solutions and implementations are still very vendor-specific, to define
precisely what VLANs will certainly cause controversy. Nevertheless, most would agree that a
VLAN can roughly be equated as a broadcast domain. More specifically, VLANs can be seen as a
group of end stations, perhaps on multiple physical LAN segments, which are not constrained by
their physical location and can communicate as if they were on a common LAN.
There are several ways to define VLAN membership: port grouping, frame tagging, MAC-layer
grouping, network-layer grouping, IP multicast grouping, etc. Ether-GSH4T utilizes port-grouping
(port-based VLAN) for the implementation of VLAN in your network.
Port-based VLAN
Ether-GSH4T Gigabit Ethernet Switch fulfills the initial VLAN implementation as defining
VLAN membership by groups of switch ports. Port grouping is the most common method of
defining VLAN membership, and its configuration is straightforward. But, when a user moves from
one port to another, it takes a network manager to manually reconfigure VLAN membership.
With manual VLAN configuration, both the initial setup and all subsequent moves and changes are
controlled by the network administrator, enabling a high degree of control. Also moving users
manually with VLANs may actually be easier than moving users across router subnets.
Table Maintenance via Signaling
When an end-station broadcasts its first frame, the switch resolves the end-station’s attached port
with its VLAN membership in cached address tables. As VLAN membership changes, these address
tables can be manually updated by a system administrator at a management console.

1 Product Overview
4
Ether-GSH4T Gigabit Ethernet Switch
802.1q VLAN Standard
In March, 1996, the IEEE 802.1 Internet-working Subcommittee completed the initial phase of
investigation for developing a VLAN standard. The standard, known as 802.1Q, represents a major
milestone in enabling VLANs to be implemented. Since the rapid deployment of LAN switching
from around 1995, the shift toward LAN switching as a replacement for local/departmental routers,
or even shared media devices (hubs) is just accelerating for now.
What is Priority Queuing?
Priority Queuing is a method of ensuring that high priority traffic gets delivered efficiently, even
when during bursts of high traffic load. In this way, traffic such as voice data and video (services
which are streaming) are prioritized, helping steady picture and sound quality.
If you have any plans to implement network telephony or any sort of video conferencing, streaming
video/audio or any real-time applications on your network you will need Ether-GSH4T for priority
queuing. The benefit of priority queuing is that it can dramatically improve the quality of priority
services on the network. If priority queuing is not implemented then the quality of these services will
depend entirely on the load on your network. If network traffic is high, the service will not work
properly.
What’s Port Mirroring?
Port Mirror function allow users to choose a port that can receive the traffic of another port or of all
ports. This function is important for users to diagnose network problem. The “monitor port” is the
port to set to be viewed by the snooping port. The “snooping port” is the port to view the traffic of
the monitored port. The Ether-GSH4T go even one step further to let you choose whether to
monitor incoming traffic, outgoing traffic, or both.
What’s Broadcast Storm Control
Broadcast Storm is the result of too much broadcast traffic in the network. Broadcast packets are
sent to every stations in the network, thus increase the overall network traffic. Broadcast storm are
likely to decrease the network performance significantly. Broadcast Storm occurs usually when
there is a loop formed in the network or when a particular application creates unordinary amount of
broadcast packets. The Ether-GSH4T has built-in broadcast storm control which filter out the
broadcast traffic when it exceeds 5% of total traffic.
Why Migrate to Gigabit Networking?
Modern enterprises and organizations rely more and more on LANs to provide network connectivity
for a growing variety of complex and mission-critical desktop applications. The increasing
multimedia transmission on network, such as video-conferencing or remote white-boarding, and
also the converging trend to integrate voice, video and data on a single physical infrastructure are all
contributing to more bandwidth-intensive traffic.
As the volume of network traffic expands, the bandwidth provided by 10 Mbps Ethernet LAN

1 Product Overview
5
Ether-GSH4T Gigabit Ethernet Switch
quickly becomes insufficient. With this consideration, 100BASE-TX Fast Ethernet becomes the
leading choice to be implemented on the connections to servers and desktops. The growing use of
100 BASE-TX Fast Ethernet connections creates a clear need for an even higher bandwidth
technology at the backbone and server level.
As higher bandwidth has been deployed more and more at the edge of the network, bandwidth at the
backbone must increase considerably to accommodate the subsequent aggregate traffic. It turns out
that the most suitable solution is Gigabit Ethernet.
As an ideal solution to the bandwidth need at the backbone or server side, Ether-GSH4T Gigabit
Ethernet Switch provides exceptional bandwidth at very effective costs, while retaining the
simplicity and manageability of Ethernet and Fast Ethernet. It also provides a natural upgrade path
for your existing Ethernet installations, enabling you to leverage current workstations, networking
hardware and support-staff training without further costs.

1 Product Overview
6
Ether-GSH4T Gigabit Ethernet Switch
Ether-GFSH4T 4-port Gigabit Ethernet Switch
Product Features
The main features of Ether-FSH4G 4-port Gigabit Ethernet Switch are as follows:
Basic Features
 Gigabit Ethernet Switch with four 10/100/1000Mbps station ports
 Fully compliant with Ethernet/Fast Ethernet standards:
- IEEE 802.3 (10BASE-T Ethernet)
- IEEE 802.3u (100BASE-TX Fast Ethernet)
- IEEE 802.3ab (1000BASE-T Gigabit Ethernet over twisted-pair)
- IEEE 802.1q VLAN
- IEEE 802.1p (CoS) Class of Service
- ANSI/IEEE Std 802.3 NWay auto-negotiation
 Easy plug-and-play installation
 Store and Forward transmission to prevent packet loss
 Half/Full Duplex function for both 10 and 100Mbps data rates and full duplex for
1000Mbps of stations ports
 Auto-sensing and auto-negotiating function for all 10/100/1000BASE-T station ports
 Auto MDI/MDI-X
 Active Flow control to minimize frame drops
- Half Duplex: Back Pressure control
- Full Duplex: IEEE 802.3x compliant flow control
 Comprehensive LED indicators for system/port status monitoring:
System LEDs
- Power (green) to indicate power on/off status
- OvUn_flow(yellow) to indicate when a unicast packet overflow status.
- Bcst/DIAG (yellow) to indicate either filtering of broadcast frames or if the switch
power on self test fails status
Station Port LEDs
For port 1 ~ port 4
- 10M Link/Act (green) to indicate linking status and activity in 10Mpbs mode
- 100M Link/Act (green) to indicate linking status and activity in 100Mpbs mode
- 1000M Link/Act (green) to indicate linking status and activity in 1000Mpbs mode
- FDX/Col (yellow) to indicate Half/Full Duplex transmission and collision status
 13-inch standard rack-mountable
 Cabling distance up to 100 meters for twisted-pair cable
Advanced Features
 Console interface for switch basic management and setup
VLAN
 Port-based VLAN support:
- Support up to 4 VLAN groups via smart console configuration

1 Product Overview
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Ether-GSH4T Gigabit Ethernet Switch
 Each port can belong to multiple VLAN groups
 Ensure workgroup security
 Minimize network administration efforts of workgroup computing
Priority
 802.1p Class of Service (CoS)
 4-level priority: High/Normal
 Ensure bandwidth utilization for video/multimedia streaming applications
Port Mirror Configuration
 Monitored Port
 Snooping Port
 Monitored Packets
Broadcast Storm Control
 The Ether-GSH4T automatically filters out the broadcast traffic when the broadcast
packets exceed 5% of the total traffic. Broadcast storm can significantly impede the
performance of the network. The Ether-GSH4T protects your network from such
situations.
Unicast Overflow Indicator
 The switch is equipped with OvUn LED to indicate when the Unicast buffer overflow.
It makes network troubleshooting much easier.

2 Preparation before Installation
8
Ether-GSH4T Gigabit Ethernet Switch
Preparation before Installation
Unpack the Package
Before you begin the installation of Ether-GSH4T Gigabit Ethernet Switch, make sure that you
have all the necessary components that come with your package. Follow the steps below to unpack
your package contents:
1. Clear out an adequate space to unpack the package carton.
2. Open the package carton and take out the contents carefully.
3. Put back all the shipping materials such as plastic bag, paddings and linings into the shipping
carton and save them for future transport need.
After unpacking and taking out the entire package contents, you should check whether you have got
all the following items:
⌧ Ether-GSH4T Gigabit Ethernet Switch
⌧ One AC power cord
⌧ Rack-mounting kit (screws and mounting brackets)
⌧ Support CD-ROM
⌧ RS-232 Cable
If any of these above items is missing or damaged, please contact your local dealer for replacement.
Fig. 2-1 Package Contents

2 Preparation before Installation
9
Ether-GSH4T Gigabit Ethernet Switch
Fig. 2-2 RS-232 Cable for Console connection
The Front Panel
The front panel is where you can find the four 10/100/1000Mbps Gigabit station ports. For the
technical specifications of the ports, please refer to Appendix A, Product Specifications for detailed
information. For information concerning LED indicators, please refer to Chapter 5, LED Indicators.
Fig. 2-3 Front Panel
The Rear Panel
The rear panel is where you can locate the power switch, AC power connector and ventilator.
Power Switch
You can turn the power switch on /off to activate/deactivate the Switch. To turn on the Switch, press
the switch to the ON position. To turn off, press the switch to the OFF position.
AC Power Connector
This is a three-pronged power connector where the power cord should be attached. Just plug the
female end of the power cord into the connector, and the male end of the power cord into an AC
power outlet. The switch supports an input voltages ranging from 100 ~ 240 VAC @ 50~60 Hz and
with a maximum power output of 40 watts.
Power
D
iagnostic LEDs
Station Port Gigabit Ports

2 Preparation before Installation
10
Ether-GSH4T Gigabit Ethernet Switch
Fig. 2-3 Rear Panel
Console Port
The console port is where you should connect, with a RS-232 cable, to the host PC for smart
configuration of VLAN, Priority and Port-Mirroring function. Using the HyperTerminal utility (on
Windows 95/98/2000/XP platform), you can easily configure VLAN on a per-port basis.
As the following illustration has shown, there are markings right below the console port that gives
the setting parameters (9600, N, 8, 1) for establishing a console port connection. For the details of
establishing console port connection, please refer to Chapter 6, Configuring your Network for VLAN,
Priority and Port-Mirroring.
Fig. 2-4 Console Port
Note: Please note that, in some cases, a higher baud rate such as 19200 will have difficulties in
establishing a console connection. If that is so, we suggest you to use ” 9600” for setting. In fact,
we recommend a “9600” setting for the actual HyperTerminal connection. For more information
on console connection, please refer to Chapter 6, configuring your Network for VLAN, Priority
and Port-Mirroring.
Ventilators
These two ventilator fans help circulate the cool air through the heated components inside the switch.
The air holes on both sides of the switch also serve as heat vents to dissipate the heat. For proper
ventilation, please be careful in your installation that in any case these openings should not be
blocked. An adequate margin space for the rear and both sides of the switch should be provided. Be
Ventilator
Power Switch
Power Connector
Console Port