D-Link DES-1008D User manual

DES-1008D
10/100 Dual-Speed
Ethernet/Fast Ethernet
Switch
User’s Guide
Rev. 04 (Dec., 1999)
6DES1008D.04
Printed In Taiwan
RECYCLABLE

Trademarks
Copyright 1999 D-Link Corporation.
Contents subject to change without prior notice.
D-Link is a registered trademark of D-Link Corporation/D-Link
Systems, Inc.
All other trademarks belong to their respective proprietors.
Copyright Statement
No part of this publication may be reproduced in any form or by
any means or used to make any derivative such as translation,
transformation, or adaptation without permission from D-Link
Corporation/D-Link Systems Inc., as stipulated by the United
States Copyright Act of 1976.

Wichtige Sicherheitshinweise
1. Bitte lesen Sie sich diese Hinweise sorgfältig durch.
2. Heben Sie diese Anleitung für den spätern Gebrauch auf.
3. Vor jedem Reinigen ist das Gerät vom Stromnetz zu trennen. Vervenden Sie keine Flüssig-
oder Aerosolreiniger. Am besten dient ein angefeuchtetes Tuch zur Reinigung.
4. Um eine Beschädigung des Gerätes zu vermeiden sollten Sie nur Zubehörteile verwenden,
die vom Hersteller zugelassen sind.
5. Das Gerät is vor Feuchtigkeit zu schützen.
6. Bei der Aufstellung des Gerätes ist auf sichern Stand zu achten. Ein Kippen oder Fallen
könnte Verletzungen hervorrufen. Verwenden Sie nur sichere Standorte und beachten Sie
die Aufstellhinweise des Herstellers.
7. Die Belüftungsöffnungen dienen zur Luftzirkulation die das Gerät vor Überhitzung schützt.
Sorgen Sie dafür, daß diese Öffnungen nicht abgedeckt werden.
8. Beachten Sie beim Anschluß an das Stromnetz die Anschlußwerte.
9. Die Netzanschlußsteckdose muß aus Gründen der elektrischen Sicherheit einen
Schutzleiterkontakt haben.
10. Verlegen Sie die Netzanschlußleitung so, daß niemand darüber fallen kann. Es sollete auch
nichts auf der Leitung abgestellt werden.
11. Alle Hinweise und Warnungen die sich am Geräten befinden sind zu beachten.
12. Wird das Gerät über einen längeren Zeitraum nicht benutzt, sollten Sie es vom Stromnetz
trennen. Somit wird im Falle einer Überspannung eine Beschädigung vermieden.
13. Durch die Lüftungsöffnungen dürfen niemals Gegenstände oder Flüssigkeiten in das Gerät
gelangen. Dies könnte einen Brand bzw. Elektrischen Schlag auslösen.
14. Öffnen Sie niemals das Gerät. Das Gerät darf aus Gründen der elektrischen Sicherheit nur
von authorisiertem Servicepersonal geöffnet werden.
15. Wenn folgende Situationen auftreten ist das Gerät vom Stromnetz zu trennen und von einer
qualifizierten Servicestelle zu überprüfen:
a – Netzkabel oder Netzstecker sint beschädigt.
b – Flüssigkeit ist in das Gerät eingedrungen.
c – Das Gerät war Feuchtigkeit ausgesetzt.
d – Wenn das Gerät nicht der Bedienungsanleitung ensprechend funktioniert oder Sie mit
Hilfe dieser Anleitung keine Verbesserung erzielen.
e – Das Gerät ist gefallen und/oder das Gehäuse ist beschädigt.
f – Wenn das Gerät deutliche Anzeichen eines Defektes aufweist.
16. Bei Reparaturen dürfen nur Orginalersatzteile bzw. den Orginalteilen entsprechende Teile
verwendet werden. Der Einsatz von ungeeigneten Ersatzteilen kann eine weitere
Beschädigung hervorrufen.
17. Wenden Sie sich mit allen Fragen die Service und Repartur betreffen an Ihren
Servicepartner. Somit stellen Sie die Betriebssicherheit des Gerätes sicher.
18. Zum Netzanschluß dieses Gerätes ist eine geprüfte Leitung zu verwenden, Für einen
Nennstrom bis 6A und einem Gerätegewicht gr ßer 3kg ist eine Leitung nicht leichter als
H05VV-F, 3G, 0.75mm2 einzusetzen.

Limited Warranty
Hardware:
D-Link warrants each of its hardware products to be free from defects in workmanship and
materials under normal use and service for a period commencing on the date of purchase from
D-Link or its Authorized Reseller and extending for the length of time stipulated by the
Authorized Reseller or D-Link Branch Office nearest to the place of purchase.
This Warranty applies on the condition that the product Registration Card is filled out and
returned to a D-Link office within ninety (90) days of purchase. A list of D-Link offices is
provided at the back of this manual, together with a copy of the Registration Card.
If the product proves defective within the applicable warranty period, D-Link will provide repair
or replacement of the product. D-Link shall have the sole discretion whether to repair or
replace, and replacement product may be new or reconditioned. Replacement product shall be of
equivalent or better specifications, relative to the defective product, but need not be identical.
Any product or part repaired by D-Link pursuant to this warranty shall have a warranty period
of not less than 90 days, from date of such repair, irrespective of any earlier expiration of original
warranty period. When D-Link provides replacement, then the defective product becomes the
property of D-Link.
Warranty service may be obtained by contacting a D-Link office within the applicable warranty
period, and requesting a Return Material Authorization (RMA) number. If a Registration Card
for the product in question has not been returned to D-Link, then a proof of purchase (such as a
copy of the dated purchase invoice) must be provided. If Purchaser's circumstances require
special handling of warranty correction, then at the time of requesting RMA number, Purchaser
may also propose special procedure as may be suitable to the case.
After an RMA number is issued, the defective product must be packaged securely in the original
or other suitable shipping package to ensure that it will not be damaged in transit, and the RMA
number must be prominently marked on the outside of the package. The package must be
mailed or otherwise shipped to D-Link with all costs of mailing/shipping/insurance prepaid.
D-Link shall never be responsible for any software, firmware, information, or memory data of
Purchaser contained in, stored on, or integrated with any product returned to D-Link pursuant
to this warranty.
Any package returned to D-Link without an RMA number will be rejected and shipped back to
Purchaser at Purchaser's expense, and D-Link reserves the right in such a case to levy a
reasonable handling charge in addition mailing or shipping costs.
Software:
Warranty service for software products may be obtained by contacting a D-Link office within the
applicable warranty period. A list of D-Link offices is provided at the back of this manual,
together with a copy of the Registration Card. If a Registration Card for the product in question
has not been returned to a D-Link office, then a proof of purchase (such as a copy of the dated
purchase invoice) must be provided when requesting warranty service. The term "purchase" in
this software warranty refers to the purchase transaction and resulting license to use such
software.
D-Link warrants that its software products will perform in substantial conformance with the
applicable product documentation provided by D-Link with such software product, for a period of
ninety (90) days from the date of purchase from D-Link or its Authorized Reseller. D-Link
warrants the magnetic media, on which D-Link provides its software product, against failure

during the same warranty period. This warranty applies to purchased software, and to
replacement software provided by D-Link pursuant to this warranty, but shall not apply to any
update or replacement which may be provided for download via the Internet, or to any update
which may otherwise be provided free of charge.
D-Link's sole obligation under this software warranty shall be to replace any defective software
product with product which substantially conforms to D-Link's applicable product
documentation. Purchaser assumes responsibility for the selection of appropriate application
and system/platform software and associated reference materials. D-Link makes no warranty
that its software products will work in combination with any hardware, or any application or
system/platform software product provided by any third party, excepting only such products as
are expressly represented, in D-Link's applicable product documentation as being compatible.
D-Link's obligation under this warranty shall be a reasonable effort to provide compatibility, but
D-Link shall have no obligation to provide compatibility when there is fault in the third-party
hardware or software. D-Link makes no warranty that operation of its software products will be
uninterrupted or absolutely error-free, and no warranty that all defects in the software product,
within or without the scope of D-Link's applicable product documentation, will be corrected.
LIMITATION OF WARRANTIES
IF THE D-LINK PRODUCT DOES NOT OPERATE AS WARRANTED ABOVE, THE
CUSTOMER'S SOLE REMEDY SHALL BE, AT D-LINK'S OPTION, REPAIR OR
REPLACEMENT. THE FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE
AND ARE IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, EITHER IN
FACT OR BY OPERATION OF LAW, STATUTORY OR OTHERWISE, INCLUDING
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. D-
LINK NEITHER ASSUMES NOR AUTHORIZES ANY OTHER PERSON TO ASSUME FOR IT
ANY OTHER LIABILITY IN CONNECTION WITH THE SALE, INSTALLATION,
MAINTENANCE OR USE OF D-LINK'S PRODUCTS.
D-LINK SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND
EXAMINATION DISCLOSE THAT THE ALLEGED DEFECT IN THE PRODUCT DOES NOT
EXIST OR WAS CAUSED BY THE CUSTOMER'S OR ANY THIRD PERSON'S MISUSE,
NEGLECT, IMPROPER INSTALLATION OR TESTING, UNAUTHORIZED ATTEMPTS TO
REPAIR, OR ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE, OR BY
ACCIDENT, FIRE, LIGHTNING OR OTHER HAZARD.
LIMITATION OF LIABILITY
IN NO EVENT WILL D-LINK BE LIABLE FOR ANY DAMAGES, INCLUDING LOSS OF
DATA, LOSS OF PROFITS, COST OF COVER OR OTHER INCIDENTAL, CONSEQUENTIAL
OR INDIRECT DAMAGES ARISING OUT THE INSTALLATION, MAINTENANCE, USE,
PERFORMANCE, FAILURE OR INTERRUPTION OF A D- LINK PRODUCT, HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY. THIS LIMITATION WILL APPLY EVEN IF
D-LINK HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
IF YOU PURCHASED A D-LINK PRODUCT IN THE UNITED STATES, SOME STATES DO
NOT ALLOW THE LIMITATION OR EXCLUSION OF LIABILITY FOR INCIDENTAL OR
CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.

D-Link Offices for Registration and Warranty Service
The product's Registration Card, provided at the back of this manual, must be sent to a D-Link
office. To obtain an RMA number for warranty service as to a hardware product, or to obtain
warranty service as to a software product, contact the D-Link office nearest you. An addresses/
telephone/fax list of D-Link offices is provided in the back of this manual.
FCC Warning
This equipment has been tested and found to comply with the
limits for a Class A digital device, pursuant to Part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in
accordance with this user’s guide, may cause harmful interference
to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference in which
case the user will be required to correct the interference at his own
expense.
CE Mark Warning
This is a Class B product. In a domestic environment, this product
may cause radio interference in which case the user may be
required to take adequate measures.
VCCI A Warning

About This Guide vii
TABLE OF CONTENTS
0ABOUT THIS GUIDE......................................................................... IX
PURPOSE ......................................................................................................IX
CONVENTIONS..............................................................................................IX
OVERVIEW OF THIS USER’S GUIDE ...............................................................IX
1INTRODUCTION...................................................................................1
DUAL-SPEED ETHERNET TECHNOLOGY.........................................................1
SWITCHING TECHNOLOGY.............................................................................3
Eliminating Network Bottlenecks..............................................................4
Increasing Network Bandwidth.................................................................5
High-speed Backbones and Servers..........................................................5
Extending Fast Ethernet Networks............................................................6
10 Mbps to 100 Mbps Switching...............................................................6
DES-1008D DUAL-SPEED SWITCH ...............................................................7
Performance Features...............................................................................7
2UNPACKING AND SETUP..................................................................9
UNPACKING...................................................................................................9
SETUP..........................................................................................................10
DESKTOP OR SHELF INSTALLATION .............................................................11
WALL INSTALLATION ..................................................................................11
POWER ON...................................................................................................13
LED Indicators........................................................................................13
Power Failure .........................................................................................14
3IDENTIFYING EXTERNAL COMPONENTS..................................15
FRONT PANEL..............................................................................................15
REAR AND SIDE PANELS..............................................................................16
LED INDICATORS........................................................................................17

10/100 Fast Ethernet Switch User’s Guide
viii About This Guide
4CONNECTING THE SWITCH...........................................................19
CABLES .......................................................................................................19
PC TO SWITCH.............................................................................................20
HUB TO SWITCH ..........................................................................................22
Using a straight cable.............................................................................22
Using a crossover cable..........................................................................23
10BASE-T Hubs ......................................................................................23
10/100 Dual-speed and 100Base-TX Hubs.............................................24
SWITCH TO SWITCH (OR OTHER DEVICES)....................................................24
Using a straight cable.............................................................................25
Using a crossover cable..........................................................................25
5TECHNICAL SPECIFICATIONS......................................................27
6CABLES AND CONNECTORS ..........................................................29
7INDEX....................................................................................................32

10/100 Dual-Speed Switch User’s Guide
About This Guide ix
0 ABOUT THIS GUIDE
Congratulations on your purchase of the 10/100 Dual-speed Switch.
This device integrates 100Mbps Fast Ethernet and 10Mbps
Ethernet network capabilities in a highly flexible desktop package.
Purpose
This manual provides detailed specifications and discusses how to
install your DES-1008D Dual-speed Switch.
Conventions
For simplicity, the term ‘switch’ refers to all Dual-speed, Ethernet
or Fast Ethernet switches, including the DES-1008D. The model
number is used only to explain features specific to the DES-1008D
switch.
Overview of this User’s Guide
♦Chapter 1, Introduction. Describes the switch and its
features.
♦Chapter 2, Unpacking and Setup. Helps you get started with
the basic installation of the switch.

10/100 Dual-Speed Switch User’s Guide
xAbout This Guide
♦Chapter 3, Identifying External Components. Describes the
front panel, rear panel and LED indicators of the switch.
♦Chapter 4, Connecting the Switch. Tells how you can connect
the DES-1008D to your Ethernet/Fast Ethernet network.
♦Appendix A, Technical Specifications. Lists the technical
(general, physical and environmental, and performance)
specifications of the switch.
♦Appendix B, Cables and Connectors. Describes the RJ-45
receptacle/connector and the straight and crossover cable
connector.

10/100 Dual-Speed Switch User’s Guide
Introduction 1
1
1 INTRODUCTION
This section describes the features of the DES-1008D, and gives
some background information about Ethernet/Fast Ethernet
switching technology.
Dual-Speed Ethernet Technology
The growing importance of LANs and the increasing complexity of
desktop computing applications are fueling the need for higher
performance networks. A number of high-speed network
technologies have been proposed to provide greater bandwidth and
improve client/server response times. Among them, Fast Ethernet,
or 100Base-T, provides a non-disruptive and smooth evolution from
the current 10Base-T Ethernet technology.
Fast Ethernet is a new standard specified by the IEEE 802.3 LAN
committee. It is an extension of the 10 Mbps Ethernet standard
with the ability to transmit and receive data at 100 Mbps, while
maintaining the CSMA/CD Ethernet protocol. Since 100 Mbps
Fast Ethernet is compatible with 10 Mbps Ethernet environments,
it provides a straightforward upgrade and takes advantage of the
company’s existing investment in hardware, software, and
personnel training.

10/100 Dual-Speed Switch User’s Guide
2Introduction
One of the biggest advantages of Fast Ethernet over other high
speed networking solutions is the ability of existing 10 Mbps
Ethernet networks to be gradually upgraded; network performance
can be improved by adding Fast Ethernet components only when
and where needed. This cost-efficient migration strategy is realized
through dual-speed devices which can operate at either 10 Mbps or
100 Mbps, depending on the speed of the device it is connected to.
Fast, efficient and relatively inexpensive dual-speed devices are
made possible because there is no need to translate between
Ethernet and Fast Ethernet protocols. This allows for much lower
latencies (making your network faster), and easy installation,
especially if the devices use NWay Auto-Negotiation technology.
NWay is implemented on a port-by-port basis on dual-speed
devices. If NWay is implemented on a port it will automatically
sense the connection speed (10 or 100 Mbps) and duplex mode (full
or half) of any device connected to that port. NWay will establish
the connection at the highest speed attainable by both devices and
will use full duplex transmission if both devices have this
capability.
Your DES-1008D has 8 ports, all of which are dual-speed, capable
of full/half duplex operation and NWay enabled. All Ethernet and
Fast Ethernet devices connected to the switch will be able to
intercommunicate.

10/100 Dual-Speed Switch User’s Guide
Introduction 3
Switching Technology
Switches can increase network performance by:
•Eliminating network bottlenecks.
•Increasing data throughput (also called aggregate bandwidth)
to support more traffic.
•Providing high-speed, dedicated (collision-free) data paths for
network backbones and servers.
•Extending Fast Ethernet networks beyond the intrinsic two
repeater, 205 meter network diameter limits.
•In the case of dual-speed switches, connecting 10 Mbps
Ethernet networks with 100 Mbps Fast Ethernet networks.
In general, a switch receives incoming data packets, temporarily
stores them, then forwards the packets out the switch port that
leads to the destination. Unlike a hub, which receives a signal from
one port and repeats it to all other ports, a switch is selective as to
which port will receive the data being sent, involving only two
ports of the switch (the source and destination ports).
The CSMA/CD medium access scheme which Ethernet and Fast
Ethernet are based on requires all stations connected to the
network to compete for use of the wires. If one station is
transmitting data, the data is broadcast (by hubs) throughout the
network and during this time, no other station can transmit. If a
station tries to transmit at the same time as another, a collision
will occur, both stations data will be destroyed and the stations will
wait for a random period before trying to retransmit the data
again.

10/100 Dual-Speed Switch User’s Guide
4Introduction
Eliminating Network Bottlenecks
Collisions are a normal occurrence when using Ethernet and they
don’t usually have a noticeable affect on overall network
performance. However, when too many stations are competing for
use of the network, collision rates can become very high and
network performance can be affected. Degraded performance is
characterized by long delay times, usually the result of high
collision rates in certain components or network segments. These
congested areas are called bottlenecks.
An area of the network where collisions can occur is called a
collision domain or segment. Switches, by their very nature are
outside collision domains; each port on a switch is a separate
collision domain, and stations connected to different ports on a
switch reside in different collision domains. A switch allows high-
speed, collision-free communication between the collision domains
connected to it.
If, for example, eight Ethernet stations are connected to an
Ethernet hub, they share the 10 Mbps Ethernet bandwidth. This
results in an average bandwidth per station of 1.25 Mbps. If the
same eight stations are connected to an Ethernet switch, each
station has 10 Mbps of dedicated, collision-free bandwidth. Since
collisions cannot occur, traffic is sure to flow between the connected
segments.
Eliminating network bottlenecks involves identifying the major
sources of network traffic (network servers for example) and giving
them their own Fast Ethernet and/or switched connections. Also,
switches can be used to divide collision domains containing many
users into smaller, less populated segments, thus distributing the
network load and reducing competition for the wire.

10/100 Dual-Speed Switch User’s Guide
Introduction 5
Increasing Network Bandwidth
A switch is capable of receiving and forwarding transmissions for
more than one port at the same time. In the case of half-duplex
ports which can either send or receive data, the switch can handle
transmissions from up to half of its ports (since the other half are
presumably receiving). In the case of full-duplex ports which can
send and receive at the same time, the switch can handle
simultaneous transmissions from all of its ports.
When a switch is handling two transmissions simultaneously, it
actually increases the bandwidth of the network. If, for example, a
switch is simultaneously transferring data from two 100 Mbps
ports to two other ports, the switch is handling 200 Mbps of traffic.
The switch has effectively doubled the overall network capacity. If
the ports are using full-duplex connections and the receiving ports
are simultaneously transmitting, then the switch is handling 400
Mbps of data, doubling the overall network bandwidth once again.
A switch that can process simultaneous full-duplex traffic from all
of its ports is able to operate at full wire speed. The total amount of
traffic a switch can handle is called the aggregate bandwidth.
This multiplication of network bandwidth allows high-speed,
collision-free communications between different network segments
that are interconnected through the switch.
High-speed Backbones and Servers
The ability of switches to support high-bandwidth, full-duplex,
collision-free connections makes them perfect for interconnecting
network segments, in other words, operating as the backbone of
the network. Full-duplex Fast Ethernet switch to switch
connections operate at 200 Mbps. Network servers (or any other
computer) using full-duplex Fast Ethernet NIC’s can also have a
200 Mbps collision-free connection to the network.

10/100 Dual-Speed Switch User’s Guide
6Introduction
Since bottlenecks most commonly occur in the backbone and
servers, installing a switch to service these areas can greatly
increase the speed of a network without having to replace other
network components such as the servers themselves, hubs, client
NIC’s, etc.
Extending Fast Ethernet Networks
Due to the increased speed in Fast Ethernet and adherence to the
IEEE 802.3u specifications, the network diameter of 100BASE-TX
collision domains is limited to 205 meters; in contrast, the
maximum 10BASE-T Ethernet collision domain can be up to 500
meters in diameter. Likewise, Fast Ethernet can only support two
repeaters (hubs or hub stacks) in a collision domain while Ethernet
supports up to four.
As discussed earlier, switches are not subject to collision domain
restrictions. Connections to switches are only subject to the 100
meter limit placed on lengths of twisted-pair cabling. Thus, Fast
Ethernet or dual-speed switches can be used at one or both ends of
a Fast Ethernet collision domain and more Fast Ethernet devices
can be connected to the network through the switch.
The new devices connected through the switch will be able to
communicate with everyone on the network, but will not be part of
the original collision domain. This condition is actually beneficial,
since traffic on one segment will not pass through the switch to any
other segment unless its destination lies in that direction. This
selective forwarding feature leaves segments connected through
the switch free of unnecessary traffic.
10 Mbps to 100 Mbps Switching
Dual-speed Ethernet/Fast Ethernet switches seamlessly link
10Base-T Ethernet segments with 100Base-TX Fast Ethernet

10/100 Dual-Speed Switch User’s Guide
Introduction 7
segments. NWay enabled ports are automatically configured,
making these connections even easier.
This conversion feature inherent in dual-speed switches allows for
gradual migrations to Fast Ethernet allowing older Ethernet
stations to communicate with newer Fast Ethernet devices and
vice-versa.
DES-1008D Dual-Speed Switch
Performance Features
♦Eight UTP/STP ports. All ports are 10/100 Mbps dual-speed,
NWay enabled Full/Half duplex.
♦Uplink (MDI-II) port for straight-through connections to
another switch, hub or repeater.
♦Store and forward switching scheme ensures data integrity.
♦Auto-polarity feature corrects reversed polarity on the
transmit and receive twisted-pairs for each port.
♦100% full wire speed data forwarding for 100 Mbps Fast
Ethernet (148,800 pps) and 10 Mbps Ethernet (14,880 pps)
on all ports.
♦1.6 gigabit per second aggregate bandwidth supports Full-
duplex Fast Ethernet connections on every port.
♦Data filtering eliminates all bad packets (CRC Align errors,
runts, fragments, etc.) at 100% wire-speed for all ports.
♦Half-duplex collision-based back-pressure jamming and Full-
duplex IEEE 802.3x flow control enabled.

10/100 Dual-Speed Switch User’s Guide
8Introduction
♦1K active MAC address table with self learning and table
aging.
♦1 MB memory with dynamic port buffering reduces lost
packets.

10/100 Dual-Speed Switch User’s Guide
Unpacking and Setup 9
2
2 UNPACKING AND
SETUP
This chapter provides unpacking and setup information for the
DES-1008D 10/100 Dual-speed Switch.
Unpacking
Open the shipping carton of the switch and carefully unpack its
contents. The carton should contain the following items:
♦One DES-1008D 10/100 Dual-speed Switch
♦One AC power adapter
♦One AC power cord
♦This User’s Guide
♦Four rubber feet with adhesive backing
♦Wall mount kit, consisting of two tapping screws and two
nylon anchors
If any item is found missing or damaged, please contact your local
D-Link Reseller for replacement.

10/100 Dual-Speed Switch User’s Guide
10 Unpacking and Setup
Setup
The site where you install the DES-1008D Switch may greatly
affect its performance. Please follow these guidelines for setting up
the switch.
♦Install the switch on a sturdy, level surface that can support
at least 2 kg of weight. Do not place heavy objects on the
switch.
♦The power outlet should be within 1.82 meters (6 feet) of the
switch.
♦Visually inspect the power adapter cord and see that it is
fully secured to the DC power port.
♦Make sure that there is proper heat dissipation from and
adequate ventilation around the switch. Leave at least 10 cm
of space at the front and rear of the switch for ventilation.
♦Install the switch in a fairly cool and dry place. See
Appendix A, Technical Specifications, for the acceptable
temperature and humidity operating ranges.
♦Install the switch in a site free from strong electromagnetic
field generators (such as motors), vibration, dust, and direct
exposure to sunlight.
♦When installing the switch on a level surface, attach the
rubber feet to the bottom of the device. The rubber feet
cushion the switch, protect the casing from scratches and
prevent it from scratching other surfaces.