DES-1008D/ DSS-8+ 8-Port 10/100Mbps Switch Manual
RECYCLABLE (Sep., 2006) Rev.1.04 6DES1008D.07G

C ONTENTS

ABOUT THIS GUIDE... 1
PURPOSE...1 CONVENTIONS...1

INTRODUCTION... 2

FAST ETHERNET TECHNOLOGY...2 SWITCHING TECHNOLOGY...2 FEATURES...4

UNPACKING AND SETUP.. 6

UNPACKING...6 SETUP....6
IDENTIFYING EXTERNAL COMPONENTS.. 7
FRONT PANEL...7 LED INDICATORS...7 REAR PANEL...8
CONNECTING THE DES-1008D/ DSS-8+. 9
COMPUTER TO DES-1008D/ DSS-8+...9 HUB TO DES-1008D/ DSS-8+...9 DES-1008D/ DSS-8+ TO OTHER DEVICES..9 PORT SPEED & DUPLEX MODE...10
MOUNTING THE SWITCH ON A WALL.. 11 TECHNICAL SPECIFICATIONS.. 12 RJ-45 PIN SPECIFICATION... 14

A BOUT T HIS G UIDE

Congratulations on your purchase of the DES-1008D/ DSS-8+ Switch. This device integrates 100Mbps Fast Ethernet and 10Mbps Ethernet network capabilities into one high-performance, easy-touse solution.

Purpose

This manual will familiarize you with the DES-1008D/ DSS-8+ Switch and guide you through the installation process.

Conventions

For simplicity, this documentation uses the term Switch (first letter upper case) to refer to the DES-1008D/ DSS-8+ Ethernet Switch, and switch (first letter lower case) to refer to other Ethernet switches.

I NTRODUCTION

Fast Ethernet Technology
The growing importance of LANs and the increasing complexity of desktop computing applications are fueling the need for high performance networks. 100BASE-T (Fast Ethernet) provides a costeffective and high-performance solution for small workgroups, SMBs (Small to Medium Businesses), and any network supporting bandwidth-intensive applications. Fast Ethernet technology operates at 10 times the speed of traditional Ethernet, offering maximum performance and enhanced capability for existing Ethernet-based networks. 100Mbps Fast Ethernet is a standard specified by the IEEE 802.3 LAN committee. It is an extension of the 10Mbps Ethernet standard with the ability to transmit and receive data at 100Mbps, while maintaining the CSMA/CD Ethernet protocol. Since the 100Mbps Fast Ethernet is compatible with all other 10Mbps Ethernet environments, it provides a straightforward upgrade path and takes advantage of the existing investment in hardware, software, and personnel training.

Switching Technology

Switching is a cost-effective way of increasing the total network capacity available to users on a LAN. If an Ethernet network begins to display symptoms of congestion, low throughput, slow response times, and high rates of collision, installing a switch to a network can preserve much or all of the existing network's cabling and workstation interface card infrastructure, while still greatly enhancing the throughput for users. A switch is a viable solution even if demanding applications, such as multimedia production and video conferencing, are on the horizon. The most promising techniques, as well as the best return on investment, could well consist of installing the right mixture of Ethernet switches. 2
A switch increases capacity and decreases network loading by dividing a local area network into different LAN segments. Dividing a LAN into multiple segments is one of the most common ways of increasing available bandwidth. If segmented correctly, most network traffic will remain within a single segment, enjoying the fullline speed bandwidth of that segment. Switches provide full-line speed and dedicated bandwidth for all connections. This is in contrast to hubs, which use the traditional shared networking topology, where the connected nodes contend for the same network bandwidth. When two switching nodes are communicating, they are connected with a dedicated channel between them, so there is no contention for network bandwidth with other nodes. As a result, the switch reduces considerably, the likelihood of traffic congestion. For Ethernet networks, a switch is an effective way of eliminating the problem of chaining hubs beyond the two-repeater limit. A switch can be used to split parts of the network into different collision domains, making it possible to expand your Ethernet network beyond the 205-meter network diameter limit for 100BASETX networks. Switches supporting both 10Mbps Ethernet and 100Mbps Fast Ethernet are also ideal for bridging between existing 10Mbps networks and newer 100Mbps networks. Switching LAN technology is a marked improvement over the previous generation of network hubs and bridges, which were characterized by higher latencies. Routers have also been used to segment local area networks, but the cost of a router, the setup and maintenance required, make routers relatively impractical. Today switches are an ideal solution for most kinds of local area network congestion problems.

Features

The DES-1008D/ DSS-8+ is a high performance switch designed specifically for environments where traffic on the network and the number of users increase continuously. The DES-1008D/ DSS-8+, with its small, compact size, was specifically designed for small to mid-sized workgroups. The DES1008D/ DSS-8+ can be installed where space is limited; moreover, it provides immediate access to a rapidly growing network through a wide range of user-reliable functions. The DES-1008D/ DSS-8+ is ideal for deployment with multiple highspeed servers for 10Mbps or 100Mbps shared-bandwidth workgroups. With the highest bandwidth at 200Mbps (100Mbps fullduplex mode), any port can provide workstations with a congestionfree data pipe for simultaneous access to the server. The DES-1008D/ DSS-8+ is scalable, allowing two or more DES1008D/ DSS-8+s to be cascaded together. Since all ports support 200Mbps, any one of its eight ports may be used to cascade to an additional switch to open a Full-Duplex Fast Ethernet pipe. The DES-1008D/ DSS-8+ is the perfect choice for a department or office planning to upgrade to Fast Ethernet. The DES-1008D/ DSS8+ can accommodate 10Mbps or 100Mbps devices, providing a flexible solution for existing (10Mbps) Ethernet workgroups. The DES-1008D/ DSS-8+ combines dynamic memory allocation with store-and-forward switching to ensure that the buffer is effectively allocated for each port; and it controls the data flow between the transmit and receive nodes to guarantee against possible packet loss. The DES-1008D/ DSS-8+ is an unmanaged 10/100Mbps Fast Ethernet switch that offers solutions for the accelerating bandwidth needs of small Ethernet workgroups. Other key features include: Store-and-forward switching scheme capability. As the result of 4
complete frame checking and error frame filtering, this scheme prevents error packages from transmitting among segments.
Auto-MDI/MDI-X. Detects the type of cable you are using, Crossover or Straight-Through, and automatically adjusts per port, allowing you to also use any port as an uplink portthe choice is yours. No more worries about whether you are using the right cable type or not. Auto MDI/MDI-X cable-type detection gives you true plug and play capability. Nway Auto-negotiation for any port. This allows for autosensing of speed (10/100Mbps) and duplex mode (10/20/100/200Mbps), providing an automatic and flexible solution for the network. Flow control for any port. This minimizes dropped packets by sending out collision signals when the ports receiving buffer is full. Note that flow control is only available in half duplex mode. Data filtering rate eliminates all error packets, runts, etc., per port at wire-speed for 100Mbps operation and 10Mbps operation.

U NPACKING

Unpacking

S ETUP

Open the box and carefully unpack it. The box should contain the following items: 1. One DES-1008D/ DSS-8+: 8-Port 10/100Mbps Ethernet Switch 2. One External Power Adapter 3. Four Rubber Feet 4. Nylon screw anchors and T3 x 15L screws 5. This Manual 6. Quick Installation Guide If any item is missing or damaged, please contact your local reseller for a replacement.
The setup of the DES-1008D/ DSS-8+ can be performed using the following steps: The power outlet should be within 1.82 meters (6 feet) of the Switch. Visually inspect the DC power jack and make sure that it is fully secured to the power adapter. Do not cover the ventilation holes on the sides of the Switch, and make sure there is adequate ventilation around it. Do not place heavy objects on the switch.
I DENTIFYING E XTERNAL C OMPONENTS

Front Panel

The figure below shows the front panel of the DES-1008D/ DSS-8+.
Front Panel LED Indicators

LED Indicators

Power Indicator This green indicator light is on when the DES-1008D/ DSS-8+ is receiving power; otherwise, it is off. 100Mbps Link/Activity, 10Mbps Link/Activity Indicator (100 Link/Act (green), 10 Link/Act (amber)) This LED indicator light is green when the port is connected to a 100Mbps Fast Ethernet station. The green indicator blinks as Fast Ethernet data is transmitted or received. The indicator light is amber when the port is connected to a 10Mbps Ethernet station, or other network device. The amber indicator blinks as Ethernet data is transmitted or received.

Rear Panel

DES-1008D/ DSS-8+ 10/100Mbps Fast Ethernet Switch
Auto MDI/MDI-X Ports: All ports support automatic MDI/MDI-X cable-type detection, which eliminates the issue of choosing the right cable (Crossover or Straight-Through). The Auto MDI/MDI-X function makes it simple to connect to the Switch using either a Crossover or Straight-Through CAT5 cable into any portthe choice is yours. DC Power Jack: Power is supplied through an external DC power adapter. Check the technical specification section for information about the DC power input voltage. Since the DES-1008D/ DSS-8+ does not include a power button, plugging its power adapter into a power outlet will immediately power it on.

CONNECTING THE

DES-1008D/ DSS-8+
Computer to DES-1008D/ DSS-8+
A computer can be connected to the DES-1008D/ DSS-8+ via a two-pair Category 3, 4, 5 UTP/STP Straight-Through or Crossover cable. A computer equipped with a RJ-45 10/100Mbps port can be connected to any of the eight DES-1008D/ DSS-8+ ports. The LED indicators for the computer connection depend on the capability of the computers Ethernet card. If the LED indicators are not lit after making a proper connection, check the computers Ethernet card, the cable, or the DES-1008D/ DSS-8+s conditions and connections.

Hub to DES-1008D/ DSS-8+

A hub (10BASE-T or 100BASE-TX) can be connected to the DES1008D/ DSS-8+ via a two-pair Category 3, 4, or 5 UTP/STP Straight-Through or Crossover cable. For 100Mbps operation a Category 5 cable must be used. The connection is accomplished from any port of the hub to any port of the DES-1008D/ DSS-8+.
DES-1008D/ DSS-8+ to other devices
The DES-1008D/ DSS-8+ can be connected to another switch or other devices (routers, bridges, etc.) via a two-pair Category 3, 4, 5 UTP/STP Straight-Through or Crossover cable. A Category 5 cable must be used for 100Mbps operation. The connection can be accomplished from any (MDI-X) port on the DES-1008D/ DSS-8+ to any of the 10Mbps or 100Mbps (MDI-X) ports on another switch or other devices.
Port Speed & Duplex Mode
After plugging the selected cable to a specific port, the system uses auto-negotiation to determine the transmission mode, autodetecting the network speed (10Mbps or 100Mbps) for any new twisted-pair connection. If the attached device does not support auto-negotiation or has auto-negotiation disabled, an auto-sensing process is initiated to select the speed and half-duplex mode is selected.

M OUNTING

S WITCH
The DES-1008D/ DSS-8+ can also be mounted on a wall. Two mounting slots are provided on the bottom of the switch for this purpose. Please make sure that the front panel is exposed in order to view the LEDs. Please refer to the illustration below:
A.) Mounting on a cement wall
1. Mount the Nylon screw anchors into a cement wall. 2. Drive the T3 x 15L screws into the Nylon screw anchors. 3. Hook the mounting holes of the switch back on the screws; you have completed the wall-mount.
B.) Mounting on a wood wall
1. Drive the T3 x 15 L screws into the wood wall. 2. Hook the mounting holes of the switch back on the screws; you have completed the wall-mount.
(1) 3/4 inch minimum for wood wall (2) 3 inch minimum for cement wall.
T ECHN ICAL S PECIFIC ATIONS

General

Standards IEEE 802.3 10BASE-T Ethernet IEEE 802.3u 100BASE-TX Fast Ethernet IEEE 802.3x Flow Control Protocol Data Transfer Rate CSMA/CD Ethernet: 10Mbps (half duplex), 20Mbps (full-duplex) Fast Ethernet: 100Mbps (half duplex), 200Mbps (full- duplex) Topology Network Cables Star 10BASET: 2-pair UTP Cat. 3,4,5 (100 m), EIA/TIA- 568 100-ohm STP (100 m) 100BASE-TX: 2-pair UTP Cat. 5 (100 m), EIA/TIA-568 100-ohm STP (100 m) Number of Ports 8 x 10/100Mbps auto-negotiation, auto MDI-X ports
Physical and Environmental
DC inputs DC 7.5V / 1A DC 5V/1.2A AC 9V /1A [Different power lists would be packed for different shipping regions ] Power Consumption Temperature Humidity Dimensions EMI: Safety: 3.37 Watts (Max) Operating: 0 ~ 50 C (32 to 122 F), Storage: -10 ~ 70 C (14to 158 F) Operating: 10% ~ 90%, Storage: 5% ~ 90% 192.5 x 118.5 x 32 mm (W x H x D) (approx. 7.5 x 4.5 x 1.25 inches) FCC Class B, ICES-003 Class B, CE Mark B, VCCI Class B CSA International

Performance

Transmission Method: RAM Buffer Filtering Address Table Packet Filtering / Forwarding Rate: MAC Address Learning: Store-and-forward 64KBytes per device 1K entries per device 10Mbps Ethernet: 14,880/pps 100Mbps Fast Ethernet: 148,800/pps Automatic update
RJ-45 P IN S PECIFICATION
The following diagram and tables show the standard RJ-45 receptacle/connector and their pin assignments.
RJ-45 Connector pin assignment Contact Media Direct Interface Signal Tx + (transmit) Tx - (transmit) Rx + (receive) Not used Not used Rx - (receive) Not used Not used

RJ-45 pin assignment

Standard RJ-45 receptacle/connector

DES-1008D 8-Port 10/100Mbps Dual Speed Ethernet Switch Users Guide
Rev. 02 (Mar. 2000) 6012-9600011 Printed In Taiwan

RECYCLABLE

LIMITED WARRANTY
D-Link Systems, Inc. (D-Link) provides this limited warranty for its product only to the person or entity who originally purchased the product from D-Link or its authorized reseller or distributor. Limited Hardware Warranty: D-Link warrants that the hardware portion of the D-Link products described below (Hardware) will be free from material defects in workmanship and materials from the date of original retail purchase of the Hardware, for the period set forth below applicable to the product type (Warranty Period) if the Hardware is used and serviced in accordance with applicable documentation; provided that a completed Registration Card is returned to an Authorized D -Link Service Office within ninety (90) days after the date of original retail purchase of the Hardware. If a completed Registration Card is not received by an authorized D-Link Service Office within such ninety (90) period, then the Warranty Period shall be ninety (90) days from the date of purchase. Product Type Warranty Period
Product (excluding power supplies and fans), if purchased and delivered in the fifty (50) United States, or the District of Columbia (USA)
Product purchased or delivered outside the USA Power Supplies and Fans
As long as the original purchaser still owns the product
One (1) Year One (1) Year Ninety (90) days
Spare parts and spare kits
D-Links sole obligation shall be to repair or replace the defective Hardware at no charge to the original owner. Such repair or replacement will be rendered by D-Link at an Authorized D-Link Service Office. The replacement Hardware need not be new or of an identical make, model or part; D-Link may in its discretion may replace the defective Hardware (or any part thereof) with any reconditioned product that D-Link reasonably determines is substantially equivalent (or superior) in all material respects
to the defective Hardware. The Warranty Period shall extend for an additional ninety (90) days after any repaired or replaced Hardware is delivered. If a material defect is incapable of correction, or if D-Link determines in its sole discretion that it is not practical to repair or replace the defective Hardware, the price paid by the original purchaser for the defective Hardware will be refunded by D-Link upon return to D-Link of the defective Hardware. All Hardware (or part thereof) that is replaced by D Link, or for which the purchase price is refunded, shall become the property of D-Link upon replacement or refund. Limited Software Warranty: D-Link warrants that the software portion of the product (Software) will substantially conform to D -Links then current functional specifications for the Software, as set forth in the applicable documentation, from the date of original delivery of the Software for a period of ninety (90) days (Warranty Period), if the Software is properly installed on approved hardware and operated as contemplated in its documentation. D -Link further warrants that, during the Warranty Period, the magnetic media on which D-Link delivers the Software will be free of physical defects. D-Links sole obligation shall be to replace the nonconforming Software (or defective media) with software that substantially conforms to D-Links functional specifications for the Software. Except as otherwise agreed by D-Link in writing, the replacement Software is provided only to the original licensee, and is subject to the terms and conditions of the license granted by D-Link for the Software. The Warranty Period shall extend for an additional ninety (90) days after any replacement Software is delivered. If a material non-conformance is incapable of correction, or if D -Link determines in its sole discretion that it is not practical to replace the non-conforming Software, the price paid by the original licensee for the non-conforming Software will be refunded by D Link; provided that the non-conforming Software (and all copies thereof) is first returned to D-Link. The license granted respecting any Software for which a refund is given automatically terminates. What You Must Do For Warranty Service: Registration Card. The Registration Card provided at the back of this manual must be completed and returned to an Authorized D -Link Service Office for each D-Link product within ninety (90) days after the product is purchased and/or licensed. The addresses/telephone/fax list of the nearest Authorized D-Link Service Office is provided in the back of this manual. FAILURE TO PROPERLY COMPLETE AND TIMELY RETURN THE

REGISTRATION CARD MAY AFFECT THE WARRANTY FOR THIS PRODUCT. Submitting A Claim. Any claim under this limited warranty must be submitted in writing before the end of the Warranty Period to an Authorized D-Link Service Office. The claim must include a written description of the Hardware defect or Software nonconformance in sufficient detail to allow DLink to confirm the same. The original product owner must obtain a Return Material Authorization (RMA) number from the Authorized D-Link Service Office and, if requested, provide writte proof of purchase of the product n (such as a copy of the dated purchase invoice for the product) before the warranty service is provided. After an RMA number is issued, the defective product must be packaged securely in the original or other suitable shi ping p 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 packaged product shall be insured and shipped to D -Link, 53 Discovery Drive, Irvine CA 92618, with all shipping costs prepaid. D-Link may reject or return any product that is not packaged and shipped in strict compliance with the foregoing requirements, or for which an RMA number is not visible from the outside of the package. The product owner agrees to pay D-Links reasonable handling and return shipping charges for any product that is not packaged and shipped in accordance with the foregoing requirements, or that is determined by D-Link not to be defective or non-conforming. What Is Not Covered: This limited warranty provided by D-Link does not cover: Products that have been subjected to abuse, accident, alteration, modification, tampering, negligence, misuse, faulty installation, lack of reasonable care, repair or service in any way that is not contemplated in the documentation for the product, or if the model or serial number has been altered, tampered with, defaced or removed; Initial installation, installation and removal of the product for repair, and shipping costs; Operational adjustments covered in the operating manual for the product, and normal maintenance; Damage that occurs in shipment, due to act of God, failures due to power
surge, and cosmetic damage; and Any hardware, software, firmware or other products or services provided by anyone other tha n D-Link. Disclaimer of Other Warranties: EXCEPT FOR THE LIMITED WARRANTY SPECIFIED HEREIN, THE PRODUCT IS PROVIDED ASIS WITHOUT ANY WARRANTY OF ANY KIND INCLUDING, WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AN NON-INFRINGEMENT. IF ANY D IMPLIED WARRANTY CANNOT BE DISCLAIMED IN ANY TERRITORY WHERE A PRODUCT IS SOLD, THE DURATION OF SUCH IMPLIED WARRANTY SHALL BE LIMITED TO NINETY (90) DAYS. EXCEPT AS EXPRESSLY COVERED UNDER THE LIMITED WARRANTY PROVIDED HEREIN, THE ENTIRE RISK AS TO THE QUALITY, SELECTION AND PERFORMANCE OF THE PRODUCT IS WITH THE PURCHASER OF THE PRODUCT. Limitation of Liability: TO THE MAXIMUM EXTENT PERMITTED BY LAW, D-LINK IS NOT LIABLE UNDER ANY CONTRACT, NEGLIGENCE, STRICT LIABILITY OR OTHER LEGAL OR EQUITABLE THEORY FOR ANY LOSS OF USE OF THE PRODUCT, INCONVENIENCE OR DAMAGES OF ANY CHARACTER, WHETHER DIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL (INCLUDING, BUT NOT LIMITED TO, DAMAGES FOR LOSS OF GOODWILL, WORK STOPPAGE, COMPUTER FAILURE OR MALFUNCTION, LOSS OF INFORMATION OR DATA CONTAINED IN, STORED ON, OR INTEGRATED WITH ANY PRODUCT RETURNED TO D-LINK FOR WARRANTY SERVICE) RESULTING FROM THE USE OF THE PRODUCT, RELATING TO WARRANTY SERVICE, OR ARISING OUT OF ANY BREACH OF THIS LIMITED WARRANTY, EVEN IF D LINK HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. THE SOLE REMEDY FOR A BREACH OF THE FOREGOING LIMITED WARRANTY IS REPAIR, REPLACEMENT OR REFUND OF THE DEFECTIVE OR NON-CONFORMING PRODUCT. GOVERNING LAW: This Limited Warranty shall be governed by the laws of the state of California. Some states do not allow exclusion or limitation of incidental or consequential damages, or limitations on how long an implied warranty lasts, so the foregoing limitations and exclusions may not apply This limited warranty provides.

specific legal rights and the product owner may also have other rights which vary from state to state.

FCC Warning

This equipment has been tested and found to comply with the regulations for a Class B 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 users 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 Mark Warning

C ONTENTS

ABOUT THIS GUIDE..1

P URPOSE....1 OVERVIEW OF THIS USERS GUIDE...1

INTRODUCTION...2

FAST ETHERNET T ECHNOLOGY...2 SWITCHING T ECHNOLOGY...2 FEATURES....4 UNPACKING...6 SETUP...6
IDENTIFYING EXTERNAL COMPONENTS.7
FRONT P ANEL....7 LED I NDICATORS....7 REAR P ANEL....8
CONNECTING THE DES -1008D...10
PC TO DES-1008D...10 HUB TO DES-1008D...10 A. 10BASE-T Hub...11 B. 100BASE-TX Hub..11 HUB WITHOUT UPLINK (MDI-II) PORT..11 A. Using straight cable...11 B. Using crossover cable...11 DES-1008D TO SWITCH (OTHER DEVICES)..11 A. Using straight cable...12 B. Using crossover cable...12 P ORT SPEED & DUPLEX MODE..12
RJ-45 PIN SPECIFICATION...13 TECHNICAL SPECIFICATIONS..15

A BOUT T HIS G U I D E

Congratulations on your purchase of the DES-1008D. This device integrates 100Mbps Fast Ethernet and 10Mbps Ethernet network capabilities in a highly flexible desktop package.

Purpose

The purpose of this manual is to show you how to install and configure your DES-1008D.
Overview of this Users Guide
? Chapter 1, Introduction. Describes the DES-1008D and its features. ? Chapter 2, Unpacking and Setup. Helps you get started with the basic installation of the DES-1008D. ? Chapter 3, Identifying External Components. Describes the front panel, rear panel and LED indicators of the DES-1008D. ? Chapter 4, Connecting the DES-1008D. Tells how you can connect the DES-1008D to your Ethernet network. ? Appendix A, Technical Specifications. Lists the technical (general, physical and environmental, and performance) specifications of the DES-1008D. ? Appendix B, RJ-45 Pin Specification. Describes the RJ-45 receptacle/connector and the straight and crossover cable connector.

IN T R O D U C T I O N

This chapter describes the features of the DES-1008D and some background information about Ethernet/Fast Ethernet switching technology.

Fast Ethernet Technology

The growing importance of LANs and the increasing complexity of desktop computing applications are fueling the need for high performance networks. A number of high-speed LAN technologies have been proposed to provide greater bandwidth and improve client/server response times. Among them, 100BASE-T (Fast Ethernet) provides a non-disruptive, smooth evolution from the current 10BASE-T technology. The non-disruptive and smooth evolution nature, and the dominating potential market base, virtually guarantee cost effective and high performance Fast Ethernet solutions in the years to come. 100Mbps Fast Ethernet is a new standard specified by the IEEE 802.3 LAN committee. It is an extension of the 10Mbps Ethernet standard with the ability to transmit and receive data at 100Mbps, while maintaining the CSMA/CD Ethernet protocol. Since the 100Mbps Fast Ethernet is compatible with all other 10Mbps Ethernet environments, it provides a straightforward upgrade and takes advantage of the existing investment in hardware, software, and personnel training.

Switching Technology

Another approach to pushing beyond the limits of Ethernet technology is the development of switching technology. A switch bridges 2
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 dividing a local area network into different segments, which dont compete with each other for network transmission capacity. The DES-1008D acts as a high-speed selective bridge between the individual segments. The DES-1008D, without interfering with any other segments, automatically forwards traffic that needs to go from one segment to another. By doing this the total network capacity is multiplied, while still maintaining the same network cabling and adapter cards. For Fast Ethernet networks, a DES-1008D is an effective way of eliminating problems of chaining hubs beyond the two-repeater limit. A DES-1008D can be used to split parts of the network into different collision domains, making it possible to expand your Fast Ethernet network beyond the 205-meter network diameter limit for 100BASE-TX networks. DES-1008Ds supporting both traditional 10Mbps Ethernet and 100Mbps Fast Ethernet are also ideal for bridging between the existing 10Mbps networks and the new 100Mbps networks. 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, the setup and maintenance required make routers r latively impractical. Today switches are an ideal e solution to most kinds of local area network congestion problems.

Features

The DES-1008D was designed for easy installation and high performance in an environment where traffic on the network and the number of users increase continuously. The DES-1008D with its small, compact size was specifically designed for small to middle workgroups. The DES-1008D can be installed where space is limited; moreover, the DES-1008D provides immediate access to a rapidly growing network through a wide range of functions. The DES-1008D is ideal for deployment with multiple high-speed servers for shared bandwidth 10Mbps or 100Mbps workgroups. With the highest bandwidth 200Mbps (100Mbps full-duplex mode), any port can provide workstations with a congestion-free data pipe for simultaneous access to the server. The DES-1008D is expandable by cascading two or more DES1008Ds together. As all ports support 200Mbps, the DES-1008D can be cascaded from any port and to any number of DES-1008Ds. The DES-1008D is a perfect choice for sites planning to upgrade to Fast Ethernet in the future. Ethernet workgroups can connect to the DES-1008D now, and you can change adapters and hubs anytime later without needing to change the DES-1008Ds or reconfigure the network. The DES-1008D combines dynamic memory allocation with storeand-forward switching to ensure that the buffer is effectively allocated for each port, while controlling the data flow between the transmit and receive nodes to guarantee against all possible packet loss. The DES-1008D is a managed 10/100 Fast Ethernet switch that offers solutions in accelerating small Ethernet workgroup bandwidth. Other key features are: 4
?? Uplink/ MDI-II (media dependent interface) port for uplink to another switch, hub or repeater. ?? Store and forward switching scheme capability. As the result of complete frame checking and error frame filtering, this scheme prevents error packages from transmitting among segments. ?? NWay Auto-negotiation for any port. This allows for autosensing of speed (10/100Mbps) thereby providing you with automatic and flexible solutions in your network connections. ?? Flow control for any port. This minimizes dropped packets by sending out collision signals when the ports receiving buffer is full. Note that flow control is only available in half duplex mode. ?? Data forwarding rate per port is at wire-speed for 100Mbps speed. ?? Data forwarding rate per port is at wire-speed for 10Mbps speed. ?? Data filtering rate eliminates all error packets, runts, etc., per port at wire-speed for 100Mbps speed. ?? Data filtering rate eliminates all error packets, runts, etc., per port at wire-speed for 10Mbps speed. ?? 8K MAC address entries table per device for the DES-1008D. ?? 256 KB RAM buffer per device for the DES-1008D. ?? Network looped detecting.

Unpacking and Setup

This chapter provides unpacking and setup information for the DES-1008D.

Unpacking

Open the box and carefully unpacks its contents. The box should contain the following items: ? One DES-1008D ? One external power adapter ? This Users Guide. If any item is found missing or damaged, please contact your local reseller for replacement.

The setup for the DES-1008D can be performed using the following steps: ?? The surface must support at least 1.5 Kg for the DES-1008D. ?? The power outlet should be within 1.82 meters (6 feet) of the DES-1008D. ?? Visually inspect the DC power jack and make sure that it is fully secured to the power adapter. ?? Make sure that there is proper heat dissipation from and adequate ventilation around the DES-1008D. Do not place heavy objects on the DES-1008D.
IDENTIFYING E XTERNAL C OMPONENTS
This section identifies all the major external components of the DES-1008D. Both the front and rear panels are shown followed by a description of each panel feature. The indicator panel is described in detail in the next chapter.

Front Panel

The figure below shows the front panel of the DES-1008D.
? LED Indicator Panel Refer to the LED Indicator section for detailed information about each of the DES-1008Ds LED indicators.

LED Indicators

Power Indicator (PWR) This indicator lights green when the hub is receiving power, otherwise, it is off. Loop Detect (LOOP) When this indicator lights amber, it means that there is a loop detected, then the network needs to be re-configuration. 7
Full-Duplex/Collision (Full-Duplex/Collision) This LED indicator lights green when a respective port is in full duplex (FDX) mode. Otherwise, it is blinking when collisions are occurring on the respective port. 100M Link/Activity, 10M Link/Activity (100M LINK/ACT (green),

10LINK/ACT(amber))

This indicator lights green when the port is connected to a 100Mbps Fast Ethernet station, if the indicator blinking green will be transmission or received data on the 100Mbps network. Otherwise, if the indicator light amber when the port is connected to a 10Mbps Ethernet station, if the indicator blinking amber will be transmission or received data on the 10Mbps network.

Rear Panel

? DC Power Jack: Power is supplied through an external AC power adapter. Check the technical specification section for information about the AC power input voltage. Since the DES-1008D does not include a power switch, plugging its power adapter into a power outlet will immediately power it on. 8
? MDI-X Jacks: Use these jacks to connect stations to the hub. These are MDI-X (Medium-Dependent Interface, Cross-wired) jacks, which mean, you can use ordinary straight-through twisted-pair cables to connect user machines and servers to the hub through them. If you need to connect another device with an MDI-X jack, such as another hub or an Ethernet switch, you should use a crossover cable, or make the connection using the MDI-X jack (described below). ? Uplink Jack(s) (MDI-II): Use this jack to connect stations to the hub. This is an MDI-II (Medium-dependent Interface, straightwired) jack, which means you can connect the hub to a device with an MDI-X port using an ordinary straight-through cable, making a crossover cable unnecessary.

C ONNECTING T HE DES-1008D
This chapter describes how to connect the DES-1008D to your Fast Ethernet network. In each of the following figures, the DES-1008D is shown.

PC to DES-1008D

A PC can be connected to DES-1008D via a two-pair Category 3, 4, 5 UTP/STP straight cable. The PC (equipped with a RJ-45 10/100Mbps phone jack) can be connected to any of the 8 ports (1x - 8x). The LED indicators for PC connection depend on the LAN cards capabilities. If LED indicators are not lit after making a proper connection, check the PC LAN card, the cable and the DES-1008D conditions and connections. The following are LED indicator possibilities for a PC to DES-1008D connection: 1. The 100LINK/ACT,10LINK/ACT LED indicator lights green for hookup to 100Mbps speed or light amber for hookup to 10Mbps speed. The Full-Duplex/Collision LED indicator depends upon LAN card capabilities for full duplex or half duplex.

Hub to DES-1008D

A hub (10 or 100BASE-TX) can be connected to the DES-1008D via a two-pair Category 3, 4, 5 UTP/STP straight cables. The connection is accomplished from the hub uplink (MDI-II) port to any of the DES1008D (MDI-X) ports: 1x - 8x for the DES-1008D.

A. 10BASE-T Hub

For a 10BASE-T hub, the DES-1008D LED indicators should light up as the following: Full-Duplex/Collision indicator is OFF. 100LINK/ACT,10LINK/ACT LED indicator is light amber.

B. 100BASE-TX Hub

For a 100BASE-TX hub, the DES-1008D LED indicators should light up as the following: Full-Duplex/Collision LED indicator is OFF. 100LINK/ACT,10LINK/ACT LED indicator is light green.
Hub without Uplink (MDI-II) port
If a hub is not equipped with an uplink ( DI-II) port, connection can M be made using either straight cable or crossover cable.

A. Using straight cable

When using straight cable, the connection can be made from the uplink (MDI-II) port of the DES-1008D to any port of the hub.

B. Using crossover cable

When using crossover cable, the connection can be made from any (MDI-X) ports of the DES-1008D to any port of the Hub.
DES-1008D to switch (other devices)
The DES-1008D can be connected to another switch or other devices (routers, bridges, etc.) via a two-pair Category 3, 4, 5 UTP/STP straight or crossover cable. 11

When using straight cable, this is done from the uplink (MDI-II) port of the DES-1008D (DES-1008D A) to any of the 10Mbps or 100Mbps (MDI-X) port of the other switch (switch B) or other devices.
When using crossover cable, this is done from any (MDI-X) port of the DES-1008D (DES-1008D A) to any of the 10Mbps, 100Mbps (MDI-X) port of the other switch (swit ch B) or other devices. 1. The 100LINK/ACT,10LINK/ACT LED indicator light green for hookup to 100Mbps speed or light amber for hookup to 10Mbps speed. 2. The Full-Duplex/Collision LED indicator depends upon LAN card capabilities for full-duplex or half-duplex
Port Speed & Duplex Mode
After plugging the selected cable to a specific port, the system uses auto-negotiation to determine the transmission mode for any new twisted-pair connection: If the attached device does not support auto-negotiation or has auto-negotiation disabled, an auto-sensing process is initiated to select the speed and set the duplex mode to half-duplex.
RJ-45 P IN S PECIFICATION
When connecting your DES-1008D to another switch, a bridge or a hub, a modified crossover cable is necessary. Please review these products for matching cable pin assignment. The following diagram and tables show the standard RJ-45 receptacle/connector and their pin assignments for the switch-tonetwork adapter card connection, and the straight / crossover cable for the DES-1008D-to-switch/hub/bridge connection.
RJ-45 Connector pin assignment Contact Media Direct Interface Signal TX + (transmit) TX - (transmit) Rx + (receive) Not used Not used Rx - (receive) Not used Not used
The standard cable, RJ-45 pin assignment
The standard RJ-45 receptacle/connector The following shows straight cable and crossover cable connection:
Straight cable for DES -1008D (uplink MDI-II port) to switch/Hub or other devices connection
Crossover cable for DES -1008D (MDI-X port) to switch/hub or other network devices (MDI-X port) connection
T ECHNICAL S PECIFICATIONS

General

Standards IEEE 802.3 10BASE-T Ethernet IEEE 802.3u 100BASE-TX Fast Ethernet ANSI/IEEE Std. 802.3 NWay Auto-negotiation Protocol Data Transfer Rate Topology Network Cables CSMA/CD Ethernet: 10Mbps (half duplex), 20Mbps (full-duplex) Fast Ethernet: 100Mbps (half duplex) 200Mbps , Star 10BASET: 2-pair UTP Cat. 3,4,5 (100 m), EIA/TIA- 568 100-ohm STP (100 m) 100BASE-TX: 2-pair UTP Cat. 5 (100 m), EIA/TIA-568 100-ohm STP (100 m) Number of Ports Uplink Port 8 x 10/100Mbps NWay ports MDI-II RJ-45 shared with port * 1, share with port 1

(full- duplex)

Physical and Environmental
DC inputs Power Consumption Temperature Humidity Dimensions EMI: DC5V/2.4A 1.2 watts. (max.) Operating: 0? ~ 50? C, Storage: -10? ~ 70? C Operating: 10% ~ 90%, Storage: 5% ~ 90% 171 x 98 x 29 mm (W x H x D) FCC Class B, CE Mark B, VCCI-II

Performance

Transmissio n Method: RAM Buffer: Filtering Address Table: Packet Filtering/For warding Rate: MAC Address Learning: Store-and-forward 256KBytes per device