DGS-1008T
8-Port 10/100/1000Mbps
Gigabit Ethernet Switch
User’s Guide
TABLE OF C ONTENTS
ABOUT THIS GUIDE...........................................................................1
T ERMS ................................................................................................1
OVERVIEW OF THIS USER’S GUIDE........................................................1
INTRODUCTION.................................................................................3
GIGABIT ETHERNET T ECHNOLOGY ......................................................3
S WITCHING TECHNOLOGY ..................................................................4
FEATURES...........................................................................................5
UNPACKING AND SETUP..................................................................7
UNPACKING........................................................................................7
S ETUP .................................................................................................7
DESKTOP OR S HELF INSTALLATION.....................................................8
RACK INSTALLATION ..........................................................................9
IDENTIFYING EXTERNAL COMPONENTS .....................................11
FRONT PANEL ...................................................................................11
REAR PANEL.....................................................................................11
LED INDICATORS..............................................................................12
TECHNICAL SPECIFICATIONS......................................................15
A BOUT THIS GUIDE
This user’s guide tells you how to install your 8-Port
10/100/1000Mbps Gigabit Ethernet Switch, how to connect it to
your Gigabit Ethernet network.
Terms
For simplicity, this documentation use s the terms “Switch” (first
letter upper case) to refer to the 8-Port 10/100/1000Mbps Gigabit
Ethernet Switch, and “switch” (first letter lower case) to refer to
all Ethernet switches, including the 8-Port 10/100/1000Mbps
Gigabit Ethernet Switch.
Overview of this User’s Guide
♦ Introduction. Describes the Switch and its features.
♦ Unpacking and Setup. Helps you get started with the basic
installation of the Switch.
♦ Identifying External Components. Describes the front
panel, rear panel, and LED indicators of the Switch.
♦ Technical Specifications. Lists the technical specifications
of the Switch.
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INTRODUCTION
This section describes the features of the 8-Port
10/100/1000Mbps Gigabit Ethernet Switch, as well as giving
some background information about Gigabit Ethernet and
switching technology.
Gigabit Ethernet Technology
Gigabit Ethernet is an extension of IEEE 802.3 Ethernet utilizing
the same packet structure, format, and support for CSMA/CD
protocol, full duplex, flow control, and management objects, but
with a tenfold increase in theoretical throughput over 100-Mbps
Fast Ethernet and a hundredfold increase over 10-Mbps
Ethernet. Since it is compatible with all 10-Mbps and 100-Mbps
Ethernet environments, Gigabit Ethernet provides a
straightforward upgrade without wasting a company’s existing
investment in hardware, software, and trained personnel.
The increased speed and extra bandwidth offered by Gigabit
Ethernet is essential to coping with the network bottlenecks
that frequently develop as computers and their busses get
faster and more users use applications that generate more
traffic. Upgrading key components, such as your backbone and
servers to Gigabit Ethernet can greatly improve network
response times as well as significantly speed up the traffic
between your subnets.
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Gigabit Ethernet supports video conferencing, complex imaging,
and similar data-intensive applications. Likewise, since data
transfers occur 10 times faster than Fast Ethernet, servers
outfitted with Gigabit Ethernet NIC’s are able to perform 10
times the number of operations in the same amount of time.
Switching Technology
Another key development pushing the limits of Ethernet
technology is in the field of switching technology. A switch
bridges Ethernet packets at the MAC address level of the
Ethernet protocol transmitting among connected Ethernet or
fast Ethernet LAN segments.
Switching is a cost -effective way of increasing the total network
capacity available to users on a local area network. A switch
increases capacity and decreases network loading by making it
possible for a local area network to be divided into different
segments which don’t compete with each other for network
transmission capacity, giving a decreased load on each.
The switch acts as a high-speed selective bridge between the
individual segments. Traffic that needs to go from one segment
to another is automatically forwarded by the switch, without
interfering with any other segments. This allows the total
network capacity to be multiplied, while still maintaining the
same network cabling and adapter cards.
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Switching LAN technology is a marked improvement over the
previous generation of network bridges, which were
characterized by higher latencies. Routers have also been used
to segment local area networks, but the cost of a router and the
setup and maintenance required make routers relatively
impractical. Today’s switches are an ideal solution to most
kinds of local area network congestion problems.
Features
The 8-Port 10/100/1000Mbps Gigabit Ethernet Switch was
designed for easy installation and high performance in an
environment where traffic on the network and the number of
users increase continuously.
u 8 10/100/1000Mbps NWay Auto-MDI Ethernet ports
u Full/half duplex transfer mode for 10Mbps and 100Mbps
u Full duplex transfer mode for 1000Mbps
u Wire speed reception and transmission
u Store-and-Forward switching method
u Integrated address Look-Up Engine, supports 8K
absolute MAC addresses
u Supports 512K Bytes data buffer per device
u Extensive front-panel diagnostic LEDs
u IEEE 802.3x flow control for full-duplex
u Back pressure flow control for half-duplex
U NPACKING AND SETUP
This chapter provides unpacking and setup information for the
Switch.
Unpacking
Open the shipping carton of the Switch and carefully unpack its
contents. The carton should contain the following items:
♦ One 8-Port 10/100/1000Mbps Gigabit Ethernet Switch
♦ Accessory pack : 2 mounting brackets and screws
♦ Four rubber feet with adhesive backing
♦ One AC power cord
♦ User’s guide
If any item is found missing or damaged, please contact your
local reseller for replacement.
Setup
The setup of the Switch can be performed using the following
steps:
♦ The surface must support at least 5 kg.
♦ The power outlet should be within 1.82 meters (6 feet) of the
device.
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♦ Visually inspect the power cord and see that it is secured
fully to the AC power connector.
♦ Make sure that there is proper heat dissipation from and
adequate ventilation around the Switch. Do not place heavy
objects on the Switch.
Desktop or Shelf Installation
When installing the Switch on a desktop or shelf, the rubber
feet included with the device must be first attached. Attach
these cushioning feet on the bottom at each corner of the
device. Allow enough ventilation space between the device and
the objects around it.
Gigabit Ethernet Switch installed on a Desktop or Shelf
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Rack Installation
The Switch can be mounted in an EIA standard size, 19-inch
rack, which can be placed in a wiring closet with other
equipment. To install, attach the mounting brackets on the
switch’s front panel (one on each side) and secure them with
the screws provided.
Attaching the mounting brackets to the Switch
Then, use the screws provided with the equipment rack to
mount the Switch in the rack.
Installing the Switch in an equipment rack
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IDENTIFYING E XTERNAL COMPONENTS
This chapter describes the front panel, rear panel and LED
indicators of the Switch
Front Panel
The front panel of the Switch consists of 8 1000BASE-T ports
and LED indicators.
Front panel view of the Switch
♦ Eight Gigabit Ethernet ports of 10/100/1000Mbps Auto-
Negotiation interface.
♦ Comprehensive LED indicators that display the conditions
of the Switch and status of the network. A description of
these LED indicators follows (see LED Indicators).
Rear Panel
The rear panel of the Switch consists of an AC power
connector. The following shows the rear panel of the Switch.
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Rear panel view of the Switch
♦ AC Power Connector This is a three-pronged connector
that supports the power cord. Plug in the female connector
of the provided power cord into this connector, and the
male into a power outlet. Supported input voltages range
from 100 ~ 240 VAC at 50 ~ 60 Hz.
LED Indicators
The LED indicators of the Switch include Power, 10/100/1000M
Link/Act, and Full-Duplex/Collision. The following shows the
LED indicators for the Switch along with an explanation of each
indicator.
The Switch LED indicators
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Per unit:
♦ Power This indicator lights green when the Switch is
receiving power , otherwise, it is off.
Per port:
♦ 1000M LINK/ACT. These LED indicators are lit when there
is a secure connection (or link) to 1000Mbps Gigabit
Ethernet device at any of the ports. The LED indicators
blink whenever there is reception or transmission (i.e.
Activity--Act) of data occurring at a port.
♦ 100M LINK/ACT. These LED indicators are lit when there
is a secure connection (or link) to 100Mbps Fast Ethernet
device at any of the ports. The LED indicators blink
whenever there is reception or transmission (i.e. Activity-Act) of data occurring at a port.
♦ 10M LINK/ACT. These LED indicators are lit when there is
a secure connection (or link) to 10Mbps Ethernet device at
any of the ports. The LED indicators blink whenever there is
reception or transmission (i.e. Activity--Act) of data
occurring at a port.
♦ FDX/COL. These LED indicators are lit when there
respective ports are in full duplex mode . Otherwise, they are
blinking when collisions are occurring on the respective
ports.
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T ECHNICAL SPECIFICATIONS
General
Standards: IEEE 802.3ab 1000BASE -T
IEEE 802.3u 100BASE -TX
IEEE 802.3 10BASE -T
Protocol: CSMA/CD
Data Transfer
Rate:
Gigabit Ethernet: 2000Mbps (Full-duplex)
Topology: Star
Network Cables: Ethernet: 2-pair UTP Cat. 3,4,5,
Fast Ethernet: 2-pair UTP Cat. 5, EIA/TIA-
Gigabit Ethernet: 4-pair UTP Cat. 5, EIA/TIA-
Number of
Ports:
Eight (8) 10/100/1000Mbps Auto-Negotiation
10Mbps (Half-duplex) Ethernet:
20Mbps (Full-duplex)
100Mbps (Half-duplex) Fast Ethernet:
200Mbps (Full-duplex)
EIA/TIA-568 100-ohm
screened twisted-pair (STP)
568 100-ohm screened twisted-
568 100-ohm screened twisted-
ports
pair (STP)
pair (STP)
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Physical and Environmental
AC inputs: 100 – 240 VAC Universal, 50/60 Hz
Power Consumption: 40 watts maximum
Operating Temperature: 0 ~ 50 degrees Celsius
Storage Temperature: -10 ~ 55 degree Celsius
Humidity: 5% ~ 95% RH, non-condensing
Dimensions:
EMI:
Safety: cUL, TUV/GS
440 mm x 200 mm x 44 mm (1U), 19
inch rack-mount width
FCC Class A, CE Mark Class A, VCCI
Class A
Performance
Transmission Method: Store-and-forward
RAM Buffer: 512K Bytes per device
Filtering Address Table: 8K MAC address per device
Packet Filtering/Forwarding Rate: Full wire speed
MAC Address Learning: Self-learning, auto-aging
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