D-Link DFE-908X User's Manual
Contents
1. cusso p x PWR Swith Link 2x Auto Part m Uplink 10M 100M Col Port Speed 100Mops Oo Oe Shen Ge eae 3 5 10 20 4 3 5 10 20 4 as ye D Link 10 5x x 7 8 Unpacking and Setup Dual Speed Stackable Hubs User s Guide BFE 308 CETTE 2850 a alin De Wk sm 2 9 4 5 7 8 1 1 Cal Port Speet O10 D Li 3 3 9 Z4 3 5 10 24 As Es jh n A i 4 1 10M 190M 5x ox 7 ex LED Indicator Panel Refer to the next chapter Understanding Indicators for detailed infor mation about each of the hub s LED indicators Twisted Pair Ports Use any of these ports to connect stations to the hub The ports are MDI X ports which means you can use ordinary straight through twisted pair cable to connect the hub to PCs workstations or servers through these ports If you need to connect to another device with MDI X ports such as another hub or an Ethernet switch you should use a crossover cable or connect using the Uplink port described below For more information about crossover connection see the Crossover Cables section on page 24 Uplink Port Th2. eene eene 23 LOOBASE TX Ethernet Cable and Connectors eee 23 Crossover Cables aede be TE e EE aN 24 SPECIFICATIONS eere eee nennen nnn n 26 EA Ke T OR PEE err 26 Hub to Hub Cascading 26 LED Indicators 27 Environmental and Physical eene 27 viii About this Guide ABOUT THIS GUIDE This guide discusses how to install and use the DFE 908 series stackable dual speed Fast Ethernet Ethernet Hubs Conventions References in this manual to the DFE 908 and DFE 908x hubs are fre quently written simply as hub or hubs where the text applies to all models Model numbers are normally used only to differentiate between the two where necessary Unless differentiated by model number all information applies to all mod els Overview of the User s Guide Chapter 1 Introduction Provides information on Fast Ethernet net works and introduces the features of the DFE 908 series hubs Chapter 2 Unpacking and Setup Helps you get started in setting up the hub Chapter 3 Understanding Indicators Describes all LED indicators on the hub s front panel Understanding these indicators is essential to effectively using the hub About this Guide ix Chapter 4 Making Connections Provides information on connect ing to the hub s twisted pair stacking hubs and linking with other 100BASE TX hubs App
3. z 5 20 40 5 10 20 40 D Link 10M Utilization 100M Utilization Hub State Indicators Power Indicator PWR 12 Understanding Indicators Dual Speed Stackable Hubs User s Guide This indicator lights green when the hub is receiving power otherwise it is off Collision Indicators Col 10M Col 100M These indicators indicate data collisions on the respective 10Mbps Ethernet or 100Mbps Fast Ethernet segments connected to the hub If several hubs are stacked or linked together all of them should detect and indicate the same collision since collisions span the entire network segment Whenever a collision is detected the respective COL indi cator will briefly blink amber 10Mbps and 100Mbps Utilization Indicators The utilization bar graphs provide a quick reference on the current traf fic load relative to the total available 10Mbps or 100Mbps network bandwidth The graphs display a measure of the percentage of band width in use on the respective network segment All data packets are counted whether valid or not Port State Indicators There is one port state indicator for each of the twisted pair ports on the hub Each port s LED status indicator reports the port s link and activity status and shows whether or not the port has been partitioned The following describes each indicator and the meaning of each condition Link steady green The indicator of a port
4. 2 916 1600 FAX 886 2 914 6299 Registration Card Print type or use block letters Your name Mr Ms Organization Dept Your title at organization Telephone Fax Organization s full address Country Date of purchase Month Day Year Product Model Product Serial Product installed in type of Product installed in No computer e g Compaq 486 computer serial No Applies to adapters only Product was purchased from Reseller s name Telephone Fax Reseller s full address Answers to the following questions help us to support your product 1 Where and how will the product primarily be used OOffice OTravel OCompany Business Home Business Personal Use 2 How many employees work at installation site O1 employee 012 9 0110 49 0150 99 1100 499 1500 999 11000 more 3 What network protocol s does your organization use OXNS IPX OTCP IP ODECnet Other 4 What network operating system s does your organization use OD Link LANsmart Novell NetWare LINetWare Lite OSCO Unix Xenix NFS 3 Open OBanyan Vines ODECnet Pathwork DWindows NT Windows NTAS OWindows 95 OOther 5 What network management program does your organization use OD View OpenView Windows OpenView Unix OSunNet Manager ONovell NMS ONetView 6000 6 What network medium media does your organization use OFiber optics OThick coax Ethernet
5. OThin coax Ethernet 010BASE T UTP STP 2100 E 00BASE TA4 01100VGAnyLAN HOther 7 What applications are used on your network ODesktop publishing OSpreadsheet OWord processing OCAD CAM DDDatabase management DAccounting Other 8 What category best describes your company DAerospace LIEngineering OEducation OFinance OHospital OLegal Olnsurance Real Estate Manufacturing ORetail Chainstore W holesale Government OTransportation Utilities Communication OVAR OSystem house company OOther 9 Would you recommend your D Link product to a friend OYes ONo ODon t know yet 10 Your comments on this product
6. a Introduction 1 Class II Fast Ethernet repeater allowing it to be linked to another Class II Fast Ethernet stack in the same collision domain On the DFE 908 the 10Mbps and 100Mbps segments are separate and do not intercommunicate The DFE 908x contains a built in switch making it possible to transparently bridge between the 10 Mbps and 100 Mbps seg ments Product Features The list below highlights the features and specifications of the DFE 908 series hubs Compatible with the IEEE 802 3 10BASE T Ethernet and 802 3u 100BASE TX Fast Ethernet industry standards for interoperability with other Ethernet Fast Ethernet network devices Ethernet connections support Category 3 or better twisted pair ca bles Fast Ethernet connections support both shielded twisted pair and Category 5 unshielded twisted pair cables Fast Ethernet connections support a maximum distance of 100 me ters from end station to hub and a total network diameter of 205 meters Eight NWay RJ 45 ports for connecting stations to the network Built in switching function DFE 908x only supports bridging be tween 10Mbps and 100Mbps segments Only one DFE 908x is needed per stack Astack can contain various D Link dual speed hub models 2 Introduction Dual Speed Stackable Hubs User s Guide LED indicators for power collisions link network activity switch capability DFE 908x only partitioning status operating speed 10
7. between any two end stations in a collision domain is 205 meters If each link between the hub and an end station is 100 meters then the hub to hub connection is limited to 5 meters However if the longest hub to end station connection is less than 100 meters then the hub to hub connec tion can be up to 100 meters long as long as the 205 meter total network diameter rule is followed Making Connections 21 The following table describes different methods of linking hubs or hub stacks HUB DEVICE PORT CABLE TO USE PORT TYPE USED A A Norma Swichor Non Crossover X Switch or eM l Hub Through Server or PC Straight Through Uplink Switch or Non Straight Through Hub Uplink Crossover X Server or PC Crossover X A crossover cable is a straight through twisted pair cable in which the wires have been crossed The figure below shows the pin assignments for an Ethernet or Fast Ethernet crossover cable Hub MDI X Hub MDI X NOTE The first twisted pair port Port 1 is shared with the Uplink port If you connect a hub to the Uplink port then do not use Port 1 22 Making Connections Dual Speed Stackable Hubs User s Guide CABLES AND CONNECTORS 100BASE TX Ethernet Cable and Connectors Cable characteristics 0 4 to 0 6 mm 22 to 26 AWG 4 pair only two pairs or four wires are used for 100BASE TX Category 5 un shielded twisted pair or EIA TIA 568 compliant 100
8. ohm shielded twisted pair Maximum segment length 100 meters Maximum network diameter 205 meters Connector RJ 45 Cables and Connectors 23 Contact MDI X Signal MDI Signal TD transmit TD transmit RD receive Not used Not used 6 TD transmit RD receive Not used 8 Notused Notused Yi Hub MDI X Crossover Cables When cascading or connecting the hub to another switch bridge or hub through the UTP port a modified crossover cable is necessary With a crossover cable two pairs of wires are switched at one connector end Carry out the following steps to create a customized crossover twisted pair cable 1 Leave one end of the cable as is with the RJ 45 connector intact The wiring at just one end of the cable needs to be modified 2 At the other end of the cable connect wires 1 and 2 to contacts 3 and 6 respectively Likewise connect wires 3 and 6 to contacts 1 and 2 Refer to the following diagram 24 Cables and Connectors Dual Speed Stackable Hubs User s Guide Hub MBI X Hub MBI X Cables and Connectors 25 SPECIFICATIONS General Standards IEEE 802 3 10BASE T Ethernet repeater IEEE 802 3u 100BASE TX Fast Ethernet repeater Class IT ANSI X3T9 5 Twisted Pair Transceiver Topology Star Protocol CSMA CD Network Data Transfer Rate Ethernet 10Mbps Fast Ethernet 100 Mbps Number of Ports per Hub 8 all dual speed 1
9. 0Mbps 100Mbps Network Cables 10BASE T 2 pair UTP Cat 3 4 5 100 m EIA TIA 568 100 ohm screened twisted pair STP 100 m 100BASE TX 2 pair UTP cat 5 100 m EIA TIA 568 100 ohm screened twisted pair STP 100 m Hub to Hub Cascading Number of Daisy Chained Hubs Maximum of 5 hubs per stack 26 Specifications Daisy Chain Port MiniSCSI type connector x 2 Daisy Chain Cable SCSI type cable supplied LED Indicators Hub Status Power 10Mbps collision 100Mbps collision 10Mbps utili zation 100Mbps utilization Port Status per port Link Receive Auto Partition Speed 10 100Mbps Environmental and Physical Power Supply 100 to 240 VAC 50 or 60 Hz internal universal power supply Power Consumption DFE 908x 10 watts max DFE 908 10 watts max Dimensions 233mm x 141mm x 44mm 9 2 x 5 6 x 1 7 inches Weight 1 2 kg 2 6 Ib Operating Temperature 10 to 55 C 14 131 F Storage Temperature 25 to 55 C 13 131 F Humidity 5 to 95 non condensing DC Fan 40mm x 40mm DC Fan 1 Emissions FCC Class B CE Mark VCCI Class B C Tick Safety UL UL 1950 CSA CSA 950 T V GS EN60950 Specifications 27 D Link Offices U S A CANADA U K GERMANY FRANCE SWEDEN DENMARK AUSTRALIA CHINA JAPAN INDIA TAIWAN D LINK SYSTEMS INC 5 Musick Irvine CA 92618 USA TEL 1 714 455 1688 FAX 1 714 455 2521 D LINK CANADA INC 2180 Dunw
10. D Link DFE 908x DFE 908 Ethernet Fast Ethernet Dual Speed Stackable Hubs User s Guide Rev 01 December 1997 6DFE908 01 Printed In Taiwan RECYCLABLE Wichtige Sicherheitshinweise 1 2 33 10 11 12 13 14 15 16 17 Bitte lesen Sie sich diese Hinweise sorgfaltig durch Heben Sie diese Anleitung f r den sp tern Gebrauch auf Vor jedem Reinigen ist das Ger t vom Stromnetz zu trennen Vervenden Sie keine Fl ssig oder Aerosolreiniger Am besten dient ein angefeuchtetes Tuch zur Reinigung Um eine Besch digung des Ger tes zu vermeiden sollten Sie nur Zubeh rteile verwenden die vom Hersteller zugelassen sind Das Ger t is vor Feuchtigkeit zu sch tzen Bei der Aufstellung des Ger tes ist auf sichern Stand zu achten Ein Kippen oder Fallen k nnte Verletzungen hervorrufen Verwenden Sie nur sichere Standorte und beachten Sie die Aufstellhinweise des Herstellers Die Bel ftungs ffnungen dienen zur Luftzirkulation die das Ger t vor berhitzung sch tzt Sorgen Sie daf r da diese ffnungen nicht abgedeckt werden Beachten Sie beim Anschlu an das Stromnetz die Anschlu werte Die Netzanschlu steckdose mu aus Gr nden der elektrischen Sicherheit einen Schutzleiterkontakt haben Verlegen Sie die Netzanschlu leitung so da niemand dar ber fallen kann Es sollete auch nichts auf der Leitung abgestellt werden Alle Hinweise und Warnungen die sich am Ger ten befinden sind z
11. NTED 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 INCIDEN
12. TAL OR CONSEQUENTIAL DAMAGES SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU iii Limited Warranty Hardware D Link warrants its hardware products to be free from defects in workmanship and materials under normal use and service for the following periods measured from date of purchase from D Link or its Authorized Reseller Product Type Warranty Period Complete products One year Spare parts and spare kits 90 days The one year period of warranty on complete products applies on condition that the product s 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 Failing such timely registration of purchase the warranty period shall be limited to 90 days If the product proves defective within the applicable warranty period D Link will provide repair or replace ment 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 defectiv
13. a case to levy a reasonable handling charge in addition mailing or shipping costs 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 iv Trademarks Copyright 1997 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 adap tation without permission from D Link Corporation D Link Systems Inc as stipulated by the United States Copyright Act of 1976 FCC Warning Class B for Model DFE 908 DFE 908x FCC ID No KA2ED2908DH This equipment has been tested and found to comply with the limits 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 in a residential installation This equipment generates uses and can radiate radio frequency energy and if not install
14. al runs of twisted pair cables that is connections from the wiring closet to the end station e Fast Ethernet s increased operational speed reduces the maximum distance between all elements of the LAN see below e EIA TIA 568 Wiring Standard does not support the use of co axial cables for horizontal wiring Network Diameter Network diameter which is the distance between two end stations in the same collision domain is the primary difference between traditional Ethernet and Fast Ethernet Due to the increased speed in Fast Ethernet and adherence to the EIA TIA 568 wiring rules the network diameter of a Fast Ethernet collision domain is limited to 205 meters in contrast the maxi mum 10BASE T Ethernet collision domain diameter be up to 500 meters 6 Introduction Dual Speed Stackable Hubs User s Guide Hub Types Unlike 1OBASE T hubs which are all functionally identical Fast Ethernet hubs are divided into two distinct types Class I and Class II A Class I hub repeats all incoming signals on one port to the other ports by first translat ing them to digital signals and then retranslating them back to line signals These translations are necessary when connecting various network media to the same collision domain such as when combining two wire pair 100BASE TX media with four wire pair 100BASE T4 media Only one Class I hub can exist within the same collision domain thus this type of hub cannot be directl
15. be up to five cable segments and four intermediate repeaters hubs hub stacks or other repeaters If there is a path between any two end stations containing five seg ments and four repeaters then at least two of the cable segments must be point to point link segments e g IOBASE T IOBASE FL while the remaining segments may be populated mixing seg ments e g 0 2 or 10BASE 5 tivity rules The maximum length of a twisted pair segment that is the distance between a port in the hub to a single address network device such as a PC server or Ethernet switch is 100 meters Cabling and other wiring should be certified as Category 5 or shielded twisted pair STP The maximum diameter in a collision domain is about 205 meters using two Class II hubs or hub stacks Between any two end stations in a collision domain there may be up to three cable segments and two Class II hubs or hub stacks Hub to End Station Connection After the hub properly installed it can support up to eight end station con nections Fast Ethernet connection requires either a Category 5 UTP cable or an STP cable These cables can be up to 100 meters long Making Connections Ethernet connection requires a Category 3 or better UTP cable It is rec ommended that you use Category 5 cabling for all connections in order to make it easier to transition all stations to 100Mbps You can connect any combination of PCs servers and
16. e 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 will ordinarily reimburse Purchaser for mailing shipping insurance expenses incurred for return of defective product in accordance with this war ranty 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
17. e Uplink port is an MDI port which means you can connect the hub or hub stack to another device with MDI X ports using an ordinary straight through cable making a crossover cable unnecessary Port 1 and the Uplink port are really the same port except that their pinouts are different Do not use both Port 1 and the Uplink port at the same time Unpacking and Setup 9 Rear Panel 10 Daisy Chain port T Daisy Chain IN AC LINE 100 240 VAC 50 60 Hz 93A Daisy Chain IN Port When cascading a set of D Link s stackable dual speed hubs this port should be connected to the Daisy Chain OUT port of the previous hub in the stack usually placed immediately above it A cascade of five hubs can be created in this way The first and last hubs in the stack use only one of the daisy chain ports while the others use both Daisy Chain OUT Port Works in conjunction with the Daisy Chain IN Port see above Con nect this port to the Daisy Chain IN Port of the next hub in the stack usually placed immediately below it using the enclosed daisy chain cable Fan Provides air circulation and heat dissipation Be sure to leave adequate space around the area of the unit for proper ventilation AC Power Connector For the power cord Unpacking and Setup Dual Speed Stackable Hubs User s Guide Installing the Hub Installation The site where you install the hub stack may greatly affect its per
18. ed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or televi sion reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures e Reorient or relocate the receiving antenna e Increase the separation between the equipment and the receiver e Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help Shielded interface cables must be used in order to comply with emission limits Changes or modifications not expressly approved by user s authority to operate this equipment VCCI B Warning IDEEN MAME SESS Xu ACC DECES SIAR MARE DSB RE RR TIEATSOLEAMELTORTM CDREMS VF SF LEV ay TERMINE REA SRITLEMHVET ARAB AA o TEL ORY BWOEUT FEW vi Dual Speed Stackable Hubs User s Guide TABLE OF CONTENTS ABOUT THIS GUIDE anciana sais IX Conventions TR ix Overview of the User s ix INTRODUCTION DRE ADOS ER REN EDU A B RD E 1 Product Description as 1 Product Features ie eese eite ete ia ebbe eee E eene 2 Dual speed Fast Ethernet Eth
19. endix A Cables and Connectors Provides specifications on the cables and connectors used with the hubs Appendix B Specifications Lists the hubs specifications About this Guide Dual Speed Stackable Hubs User s Guide INTRODUCTION This chapter introduces the DFE 908 series stackable dual speed Fast Ethernet Ethernet Hubs as well as giving some background information about the technology the hubs use Product Description The D Link DFE 908 series stackable dual speed Fast Ethernet Ethernet Hubs are designed to allow easy migration and integration between 10Mbps Ethernet and 100Mbps Fast Ethernet while providing flexibility in cable connections The DFE 908 series hubs can operate with either IEEE 802 3 10BASE T connections twisted pair Ethernet operating at 10 megabits per second or IEEE 802 3u 100BASE TX connections twisted pair Fast Ethernet oper ating at 100 megabits per second All of the twisted pair ports support Auto Negotiation NWay allowing the hub to automatically detect the speed of a network connection This means you can connect all of your Ethernet and Fast Ethernet hosts to a DFE 908 series hub stack without any rewiring required when a host is upgraded from 10Mbps to 100Mbps The DFE 908 series hubs available in 8 port models can be stacked with up to five hubs in a stack A stack of five 8 port hubs gives a total of 40 Ethernet or Fast Ethernet ports A DFE 908 series hub stack operates as
20. ernet Hub Technology Overview 3 I00BASE TX Technology Overview eese nenne 5 100Mbps Fast Ethernet Introduction u esuesssnessnnesnnessnnesnnnennneennnennenennnnen 5 Cabl s nd Con ectors e as 5 TTODOIOSy SS Ahr Men come me o MADDEN UND Lc ID D 6 Network Diameter oe E ean es ik MR Ais de 6 Hub Types eset nte eet repere ith bett Ein boss bind vey tn eh Er pipe 7 UNPACKING AND 7 Unp cking ses Rt is 8 Identifying External Components eee 8 Front Panel aee eet Duet ee MIT dar Der Dane tried 8 Uca udec c ei 10 Installing the 11 Installationzz odo te mea EUR REUS 11 UNDERSTANDING INDICATORS 12 About this Guide vii Hub State INdiCAtor ccccccccccccccsssssscccccccccssssseeccccusssecccccssceusssesececsseeues 12 P rt State Indicators e WAGON eus 13 Port Speed Indicators nuranine conan 14 Switch Indicator DFE 908x 14 MAKING CONNECTIONS eene eee nennen nnn nnn 17 Hub Cascading Building a 17 Connectivity Rules eese esee eene nnne nnne 18 Hub to End Station Connection essen enne eene 19 Hub to Hub Uplink eese eene nnne 21 CABLES AND CONNECTORS
21. formance When installing consider the following pointers Install the hub stack in a fairly cool and dry place See Appendix B Specifications for the acceptable temperature and humidity operat ing ranges Install the hub stack in a site free from strong electromagnetic field generators such as motors vibration dust and direct exposure to sunlight Leave at least 10cm of space at the front and rear of the hub for ventilation Install the hub on a sturdy level surface that can support its weight When installing the hub stack on a level surface attach the rubber feet to the bottom of each device The rubber feet cushion the hub and protect the hub case from scratches and prevent it from scratching other surfaces Unpacking and Setup 11 UNDERSTANDING INDICATORS Before connecting network devices to the hub take a few minutes to look over this section and familiarize yourself with the front panel LED indica tors of your dual speed hub depicted below BFE SG8x ELA La LL CLASS PWR Switch om 9 Link 1x Auts Part 10M 100M 2 3 5 10 40 3 5 40 20 405 D Link 10M Utilization 100M Utilization DFE 908 WIZE ae casso PWR Link Rx Auto Part m m m m um Jel 10M tom 2 3 4 5 6 7 m Col Port Speed O10 100Mbps
22. in Drive Unit 6 Mi uga Ontario LSL 5M8 Canada TEL 1 905 828 0260 FAX 1 905 828 5669 D LINK EUROPE LTD D Link House 6 Garland Road Stanmore London HA7 1DP U K TEL 44 181 2355555 FAX 44 181 2355500 D LINK DEUTSCHLAND GMBH I G Bachstrae 22 65830 Kriftel Germany TEL 49 6192 97110 FAX 49 6192 971111 D LINK FRANCE Le FLORILEGE 2 Allee de la Fresnerie 78330 Fontenay Le Fleury France TEL 33 1 30238688 FAX 33 1 30238689 D LINK A B World Trade Center P O Box 70396 107 24 Stockholm Sweden TEL 46 8 7006211 FAX 46 8 219640 D LINK DENMARK Naverland 2 DK 908 Glostrup Copenhagen Denmark TEL 45 43 969040 FAX 45 43 424347 D LINK SINGAPORE PTE LTD 77 Science Park Drive 03 03 CINTECH III Singapore Science Park Singapore 118256 EL 65 7746233 FAX 65 7746322 D LINK AUSTRALIA PTY LTD Unit 16 390 Eastern Valley Way Roseville NSW 2069 Australia TEL 61 2 94177100 FAX 61 2 94171077 D LINK BEIJING 15th Floor Science amp Technology Tower No 11 Baishiqiao Road Haidian District Beijing 100081 China TEL 86 10 68467106 FAX 86 10 68467110 D LINK TOKYO 10F 8 8 15 Nishigotanda Shinagawa ku Tokyo 141 Japan TEL 81 3 5434 9678 FAX 81 3 5434 9868 D LINK INDIA PVT LTD Bombay Office Plot No 5 Kurla Bandra Complex Rd Off Cst Rd Santacruz E Bombay 400 098 India TEL 91 22 6172478 FAX 91 22 6172476 D LINK TAIWAN 2F No 233 2 Pao Chiao Rd Hsin Tien Taipei Taiwan R O C TEL 886
23. lights green when the port is connected to a pow ered Ethernet or Fast Ethernet station If the station to which the hub is connected is powered off or if there is a problem with the link the LED will remain off Understanding Indicators 13 Receive Rx blinking green When information is received on a port its indicator will blink off briefly Upon reception the data will be transmitted to all other con nected ports Auto partition Auto part steady amber The indicator of a port lights amber when the port is automatically par titioned due to an abnormal network condition The hub will temporarily partition a port when too many collisions are detected on the port While the segment is automatically partitioned the port will be isolated from the rest of the network segment When the problem is corrected or a valid data packet is received through the port the port is automatically reconnected Port Speed Indicators There is also a port speed indicator for each of the twisted pair ports on the hub A port s speed indicator should light green when a 100BASE TX de vice is connected to the port and remain dark if the port is unconnected or if a TOBASE T device is connected Switch Indicator DFE 908x Only The DFE 908x s Switch indicator shines a steady green when the hub s built in switch is functioning correctly The indicator should shine when ever the hub has power 14 Understanding Indicators D
24. or 100 Mbps and network utilization Auto partition protection Data collision detection and handling Preamble regeneration signal retiming Two proprietary daisy chain ports for cascading up to five hubs to form one logical hub Uplink port allows easy linking of two Fast Ethernet or four Ethernet hub stacks to further expand your network Built in power supply Automatic voltage selection 100V to 240V 50 or 60Hz without fuses to change or a voltage switch to set Stackable to five units or total 40 port capability Scaleable expansion up to two stacks or a total of 78 ports Dual speed Fast Ethernet Ethernet Hub Technology Overview Dual speed Ethernet hubs have been developed to make it simpler to plan networks containing both 10Mbps Ethernet and 100Mbps Fast Ethernet technologies especially when network hosts are being gradually migrated to new Fast Ethernet connections A dual speed hub is actually two repeaters in one enclosure The 10Mbps repeater receives Ethernet transmissions from any of its ports and retrans mits them to all other ports operating at 10Mbps Similarly the 100Mbps Introduction 3 repeater retransmits Fast Ethernet transmissions from ports operating at 100Mbps to all other ports operating at the same speed 100Mbps 100Mbps 10Mbps 10Mbps 100Mbps Ethemet Ethemet Ethemet Ethemet Ethemet Station Station Station Station Station If there i
25. other single address network devices to the eight twisted pair ports using straight through twisted pair cables These cables should not be crossed over The follow ing figure illustrates the pin assignments for a straight through cable Workstation MDI Hub MDI X When connecting a PC or a server the system being connected should have an Ethernet or Fast Ethernet network interface card with a twisted pair port The following figure shows a typical connection between the hub and end stations 20 Making Connections Dual Speed Stackable Hubs User s Guide Straight Twisted Pair Cable 190m MAX DFE 308 SE 55 coi Part Spaas 10 eionMbos lt 3 5 m 40 5 m 20 Ar in Se Hub to Hub Uplink You can link two hubs or hub stacks to each other using any of the twisted pair ports or the Uplink port Linking hubs using ordinary twisted pair ports requires crossover twisted pair cables linking using one ordinary twisted pair port and the Uplink port requires an ordinary straight through twisted pair cable The Uplink port is shared with Port 1 and you should not use both Port 1 and the Uplink port at the same time When connecting two hubs or hub stacks in this fashion the maximum distance
26. s a DFE 908x hub present in the stack its built in switch serves as a bridge between the two independent segments 10Mbps Repeater 100Mbps Repeater NWay Detection Built in Switch neon RJ 45 Ports A t A 4 A M y v 100Mbps 100Mbps 10Mbps 10Mbps 100Mbps Ethernet Ethernet Ethernet Ethernet Ethernet Station Station Station Station Station 4 Introduction Dual Speed Stackable Hubs User s Guide 100BASE TX Technology Overview 100Mbps Fast Ethernet Introduction Computers today have become increasingly powerful with the capability to accommodate very sophisticated uses such as multimedia applications video conferencing and CAD CAM To utilize these technologically ad vanced applications more efficiently there is also a growing demand for faster networks that can handle heavy network traffic Recognizing this need for greater bandwidth and lower latency a variety of technologies such as FDDI ATM and Fast Ethernet 100Mbps have been adopted by many vendors Fast Ethernet technology stands out as the most inexpensive and smoothest migration path for existing 10Mbps Ethernet users in part because it does not require a protocol translation when sharing data with 10Mbps Ethernet Fast Ethernet is a relatively new standard specified by the IEEE 802 3 LAN committee It is an extension of the 10Mbps Ethernet standard with the ability to
27. transmit and receive data at 100Mbps while maintaining the CSMA CD Ethernet protocol Since Fast Ethernet is compatible with all 10Mbps Ethernet environments it provides a straightforward upgrade with out wasting the company s existing investment in hardware software and trained personnel Cables and Connectors Category 5 unshielded twisted pair UTP cables and shielded twisted pair STP cables are both supported Cat 5 UTP cable uses the same RJ 45 connector used with 1OBASE T wired in the same configuration Please note that the punch down blocks in the wiring closet must also be Category 5 certified Where these blocks do not meet the standard an upgrade is necessary Introduction 5 Topology A Fast Ethernet workgroup is configured in a star topology and is built around a maximum of two repeaters Each workgroup forms a separate LAN also known as a segment or collision domain and these workgroups can be easily interconnected through switches bridges or routers to form one LAN large enough to encompass a high rise building or campus envi ronment Recent innovations in LAN hub technology such as stackable hubs coupled with the decreasing cost of switches bridges and routers allow the design of low cost efficient Fast Ethernet workgroups and enter prise LANs The following factors strongly influence the architecture of Fast Ethernet networks e EIA TIA 568 Wiring Standard imposes 100 meter limit on horizont
28. u beachten Wird das Ger t ber einen l ngeren Zeitraum nicht benutzt sollten Sie es vom Stromnetz trennen Somit wird im Falle einer berspannung eine Besch digung vermieden Durch die L ftungs ffnungen d rfen niemals Gegenst nde oder Fl ssigkeiten in das Ger t gelangen Dies k nnte einen Brand bzw Elektrischen Schlag ausl sen ffnen Sie niemals das Ger t Das Ger t darf aus Gr nden der elektrischen Sicherheit nur von authorisiertem Servicepersonal ge ffnet werden Wenn folgende Situationen auftreten ist das Ger t vom Stromnetz zu trennen und von einer qualifizierten Servicestelle zu berpr fen a Netzkabel oder Netzstecker sint besch digt b Fl ssigkeit ist in das Ger t eingedrungen c Das Ger t war Feuchtigkeit ausgesetzt d Wenn das Ger t nicht der Bedienungsanleitung ensprechend funktioniert oder Sie mit Hilfe dieser Anleitung keine Verbesserung erzielen e Das Ger t ist gefallen und oder das Geh use ist besch digt f Wenn das Ger t deutliche Anzeichen eines Defektes aufweist Bei Reparaturen d rfen nur Orginalersatzteile bzw den Orginalteilen entsprechende Teile verwendet werden Der Einsatz von ungeeigneten Ersatzteilen kann eine weitere Besch digung hervorrufen Wenden Sie sich mit allen Fragen die Service und Repartur betreffen an Ihren Servicepartner Somit stellen Sie die Betriebssicherheit des Ger tes sicher WARRANTIES EXCLUSIVE IF THE D LINK PRODUCT DOES NOT OPERATE AS WARRA
29. ual Speed Stackable Hubs User s Guide Understanding Indicators 15 Dual Speed Stackable Hubs User s Guide MAKING CONNECTIONS This chapter discusses how to make connections to the hub s twisted pair ports cascading hubs to create a stack and linking with other hubs or hub stacks Hub Cascading Building a Stack You can stack up to five hubs using the daisy chain ports to form one logi cal hub In this configuration the interconnected hubs constitute a single logical unit providing a maximum of 40 twisted pair ports Use the provided daisy chain cable to connect the Daisy Chain OUT port on the rear panel of one hub to the Daisy Chain IN port on the hub below it as shown in the figure below Repeat this procedure for each hub to be included in the stack Making Connections 17 Hubs should not be added to the stack or removed from the stack while the power is on to any hub in the stack Always turn off power to the entire stack before adding or removing hubs Connectivity Rules Ethernet 10Mbps networks need to respect the following connectivity rules 18 Making Connections Dual Speed Stackable Hubs User s Guide The maximum length of a twisted pair cable segment is 100 meters Fast Ethernet 100Mbps networks need to respect the following connec Cabling should be Category 3 or better Between any two end stations in a collision domain there may
30. y interlinked A Class II repeater on the other hand immediately repeats all incoming line signals on one port to the other ports no translations are performed This type of hub connects identical media within the same collision domain for example TX to TX At most two Class II hubs can exist within the same collision domain As mentioned earlier stackable Class II hubs can be used to increase the number of available nodes in a collision domain An entire hub stack counts as a single repeater DFE 908 series hubs are Class II devices UNPACKING AND SETUP This chapter provides information on the unpacking and initial installation of your hub stack Unpacking and Setup 7 Unpacking Open the shipping carton of your hub and carefully unpack the contents The carton should contain the following items One dual speed stackable hub One AC power cord suitable for your area s electrical power con nections One daisy chain cable Four rubber feet to be used for shock cushioning This User s Guide Inspect the hub and all accompanying items If any item is damaged or missing report the problem immediately to your D Link dealer Identifying External Components This section identifies all the major external components of the hub 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 DFE 908x
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