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1. _____ Q COL 1 2 3 4 5 6 7 8 Alert PWR green link OK off no link flash partition O 100 m E E E E E FF MiM ee M M OFFICE CONNECT i m Network Utilization 1 2 3 6 12 25 50 80 Dual Speed Hub 8 MDI O MDIX 10 100BASE TX Power Adapter socket MDI MDIX switch Eight 10 100BASE TX ports Only use the power Affects the operation of Use suitable TP cable with RJ45 adapter that is supplied port 8 If you are connecting connectors You can connect the with the OfficeConnect another hub to port 8 set to Hub to any workstation or other Dual Speed Hub 8 Do not MDI in otherwise set to equipment that has a 10BASE T or use any other adapter MDIX out Refer to the 100BASE TX port Each port is Connecting Another capable of autosensing for OfficeConnect Hub section 10Mbps or 100Mbps operation Networking Terminology A Network is a collection of workstations for example IBM compatible PCs and other equipment for example printers connected for the purpose of exchanging information or sharing resources Networks vary in size some are within a single room others span continents A Local Area Network LAN is a network usually in an office that spa
2. BThU hr power requirement 0 to 40 C 32 to 105 F operating temperature a o 00 90 A non condensing Oo humidity 930g 2 1 Ib OfficeConnect Dual Speed Hub 8 Standards Functional ISO 8802 3 IEEE 802 3 802 3u Safety UL 1950 EN 60950 CSA 22 2 950 IEC 950 Emissions EN 55022 Class B FCC Part 15 Class B ICES 003 Class B VCCI Class B AS NZS 3548 Class B EN50082 1 Screened shielded cables must be used to ensure compliance with these EMC standards Refer to EMC Statements on page 8 for conditions of operation Environmental EN 60068 IEC 68 Acoustic Noise ISO 7779 ISO 9295 EMC STATEMENTS FCC STATEMENT 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 installed 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 o radio or television reception which can be determined by urning the equipment off and on the user is encouraged to try o correct the interference by one or more of the following meas
3. OfficeConnect Product equipment and operates at the appropriate speed Range sheet that accompanies the Hub If you wish to extend an existing Ethernet network This guide helps you get the most out of your Hub into Fast Ethernet adding a Dual Speed Hub 8 can offer a more cost effective migration path than adding both a 100Mbps hub and a 10 100Mbps switch CREATING YOUR NETWORK gt Alert LED gt PowerLED P Collision LEDs gt Port Status LEDs gt Network orange green yellow green top row 100Mbps bottom row 10Mbps Utilization LEDs Off when the Hub is operating Indicates Flash each time a If the LED is on the link between the port and the green yellow orange correctly Lit for a short period that the collision is detected next piece of network equipment is OK If the LED top row 100Mbps of time after power on for power on the Hub s is off nothing is connected or the connected bottom row 10Mbps self test If the LED is supply to 100Mbps or 10Mbps device is switched off or there is a problem with Indicate how much continuously lit there may be the Hub is segment Collisions the connection refer to the Problem Solving the 100Mbps and a problem Refer to the present are a normal part of section If flashing the port is partitioned 10Mbps segments of Problem Solving section network operation possibly due to a network loop your network are being used m Port Status
4. 100BASE TX connections must be data grade Category 5 Your supplier should stock suitable cables The maximum length of a single cable is 100m 328ft Refer to Fast Ethernet 100Mbps Configuration Rules on page 5 for further information on cable lengths in a 100Mbps network Hub Connections To connect other OfficeConnect units to your Hub you need one suitable TP cable for each unit Using the Rubber Feet and Stacking Clips The four self adhesive rubber feet prevent your Hub from sliding around on your desk Stick the feet to the marked areas at each corner of the underside of your Hub The four stacking clips are used for neatly and securely stacking your OfficeConnect units together You can stack up to four units Small units must be stacked above large units To stack your units secure the clips on one side and then on the other Use the following method to secure one side Place your new unit ona flat surface exstinguuinlt Your clips fit in these is small use positions on the these holes side of the unit existing unit is large use these holes Position a clip over one of these holes and push it in until it clicks into place Repeat this for the other clip position on the same side Keeping the front of the units aligned rest the bottom of the existing unit on the clips spikes Push the clips firmly into the existing unit until they click into place Repeat these ste
5. Q D 1 pul A ET M e lt lt laa 2 1 D S Ja Eo Q mW na na z L we OO OFFICE CONNECT t f E os Ze t Za D A She tha PA Part No DUA1675 0AAA01 Published February 1998 Welcome to the world of networking with 3Com l a OfficeConnect In the modern business environment communication Dual Speed Hub 8 ser and sharing information are crucial Computer networks have proved to be one of the fastest modes of communication The OfficeConnect product range from 3Com brings the power of computer networks to the small office The OfficeConnect Dual Speed Hub 8 is an easy to use Class Il hub repeater with eight 10 100BASE TX ports It allows you to set up a network with both Ethernet 10Mbps and Fast Ethernet 100Mbps workstations and other devices a Class Il hub can be connected to another Fast 100Mbps Ethernet hub a Class hub cannot Small Network with OfficeConnect Dual Speed Hub 8 When referring to the OfficeConnect Dual Speed The Hub is ideal for use with other OfficeConnect Hub 8 this guide uses the term Hub products The OfficeConnect product range is Each port on the Hub can be connected to either a compact and attractively designed for desktop use 10BASE T Ethernet or a 100BASE TX Fast Ethernet and neatly stacks together with clips For further device The port senses the speed of the connected information refer to the
6. SALE INSTALLATION MAINTENANCE OR USE OF ITS PRODUCTS D 3COM 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 CUSTOMER S OR ANY THIRD PERSON S MISUSE NEGLECT IMPROPER INSTALLATION OR TESTING UNAUTHORIZED ATTEMPTS TO REPAIR OR MODIFY OR ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE OR BY ACCIDENT FIRE LIGHTNING OR OTHER HAZARD LIMITATION OF LIABILITY TO THE FULL EXTENT ALLOWED BY LAW 3COM ALSO EXCLUDES FOR ITSELF AND ITS SUPPLIERS ANY LIABILITY WHETHER BASED IN CONTRACT OR TORT INCLUDING NEGLIGENCE FOR INCIDENTAL CONSEQUENTIAL INDIRECT SPECIAL OR PUNITIVE DAMAGES OF ANY KIND OR FOR LOSS OF REVENUE OR PROFITS LOSS OF BUSINESS LOSS OF INFORMATION OR DATA OR OTHER FINANCIAL LOSS ARISING OUT OF OR IN CONNECTION WITH THE SALE INSTALLATION MAINTENANCE USE PERFORMANCE FAILURE OR INTERRUPTION OF ITS PRODUCTS EVEN IF 3COM OR ITS AUTHORIZED RESELLER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES AND LIMITS ITS LIABILITY TO REPAIR REPLACEMENT OR REFUND OF THE PURCHASE PRICE PAID AT 3COM S OPTION THIS DISCLAIMER OF LIABILITY FOR DAMAGES WILL NOT BE AFFECTED IF ANY REMEDY PROVIDED HEREIN SHALL FAIL OF ITS ESSENTIAL PURPOSE Some countries states or provinces do not allow the exclusion or limitation of implied warranties or the limitation of inci
7. cifications suivantes calibre 18 AWG ype SV ou 5J a 3 conducteurs Le cordon doit tre en mesure d acheminer un courant nominal d au moins 10 A La prise femelle de branchement doit tre du type a mise a a terre mise a la masse et respecter la configuration NEMA 5 15P 15 A 125 V ou NEMA 6 15P 15 A 250 V 3Com Corporation 5400 Bayfront Plaza Santa Clara California 95052 8145 U S A 3Com Technologies 1998 All rights reserved No part of this documentation may be reproduced in any form or by any means or used to make any derivative work such as translation transformation or adaptation without permission from 3Com Technologies 3Com Technologies reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of 3Com Technologies to provide notification of such revision or change 3Com Technologies provides this documentation without warranty of any kind either implied or expressed including but not limited to the implied warranties of merchantability and fitness for a particular purpose 3Com may make improvements or changes in the product s and or the program s described in this documentation at any time UNITED STATES GOVERNMENT LEGENDS If you are a United States government agency then this documentation and the software described herein are provided to you subject to the following restricted rights For units of the Department of Defense Restric
8. cting and solving possible problems with your network These problems are rarely serious the cause is usually a disconnected or damaged cable or incorrect configuration If this section does not solve your problem contact your supplier for information on what to do next Perform these actions first m Ensure all network equipment is powered on m Power each piece of network equipment off wait about 5 seconds and then power each one on Check the following symptoms and solutions Power LED not lit Check your power adapter connection If there is still no power you may have a faulty power adapter which needs replacing with an identical OfficeConnect power adapter Do not use any other power adapter with the Hub Port Status LED not lit for a port that has a connection Check that you are using a straight through cable which is properly connected at both ends and is not damaged Refer to Twisted Pair TP Cables on page 3 Also check that the equipment connected to the Hub is powered on operating correctly and contains the correct type of connection 10Mbps Port Status LED lit for a port with a 100Mbps device connected This may be because the cable is not of a high enough quality to carry Fast Ethernet signals we recommend you use a Category 5 cable or due to a problem with the network card NIC of the attached equipment Port Status LED flashing The port is partitioned probably due to a netw
9. dental or consequential damages for certain products supplied to consumers or the limitation of liability for personal injury so the above limitations and exclusions may be limited in their application to you This warranty gives you specific legal rights which may vary depending on local law GOVERNING LAW This Limited Warranty shall be governed by the laws of the state of California 3Com Corporation 5400 Bayfront Plaza Santa Clara CA 95052 8145 U S A Tel 408 764 5000 9 1 96 Year 2000 Compliance For information on Year 2000 compliance and 3Com products visit the 3Com Year 2000 Web page http www 3com com products yr2000 html Environmental Statement Please recycle this user guide after use Please e mail any comments about this document to 3Com at pddtechpubs_comments 3Com com Please include the following information the document title OfficeConnect Dual Speed Hub 8 User Guide part number DUA1675 0AAA01 and if appropriate the page number
10. he warranty reverts to 3Com s standard lifetime limited warranty To qualify for the lifetime limited warranty and the advance hardware exchange you must submit the appropriate product warranty registration card to 3Com otherwise this product will be warranted for a period of one 1 year without advance hardware exchange HARDWARE 3Com warrants its hardware products to be free from defects in workmanship and materials under normal use and service for the following lengths of time from the date of purchase from 3Com or its Authorized Reseller Network adapters Lifetime Other hardware products One year unless otherwise specified above Spare parts and spares kits 90 days If a product does not operate as warranted above during the applicable warranty period 3Com shall at its option and expense repair the defective product or part deliver to Customer an equivalent product or part to replace the defective item or refund to Customer the purchase price paid for the defective product All products that are replaced will become the property of 3Com Replacement products may be new or reconditioned Any replaced or repaired product or part has a ninety 90 day warranty or the remainder of the initial warranty period whichever is longer 3Com shall not be responsible for any software firmware information or memory data of Customer contained in stored on or integrated with any products returned to 3Com for repair whether under warra
11. imentation qui est fournie avec l appareil pour assurer la conformit avec les normes de s curit internationales C est essentiel que le socle de prise de courant du r seau soit localis proche de l appareil et soit accessible Vous pouvez seulement enlever l alimentation de l appareil en d branchant la pi ce de raccordement d alimentation de l unit ou du socle de prise de courant Cet appareil fonctionne sous les conditiones SELV S curit du Voltage le plus Bas d apr s IEC950 les conditions desquelles sont maintenues seulement si le mat riel qui il est branch est aussi en exploitation sous SELV Il n y a pas de parties remplaceables par les utilisateurs ou entretenues par les utilisateurs l int rieur de l appareil Si vous avez un probl me physique avec l appareil qui ne peut pas tre r solu avec les actions de la r solution des probl mes dans ce guide contacter votre fournisseur D brancher la pi ce de raccordement d alimentation avant de remuer l appareil AVERTISSEMENT Les ports RJ45 de paire torsad e Ceux ci sont les socles de donn es RJ45 Ils ne peuvent pas tre utilis s comme socles de t l phone Seulement brancher les connecteurs de donn es RJ45 ces socles Cordon lectrique ae Il doit tre agr dans le pays d utilisation Etats Unis et Le cordon doit avoir re u I homologation des UL et un Canada certificat de la CSA Le cordon souple doit respecter a titre minimum les sp
12. ns no more than a single site Ethernet is a type of LAN referring to the technology used to pass information around the network It operates at 10Mbps megabits per second Fast Ethernet is a type of LAN that runs up to 10 times faster than standard Ethernet It operates at 100Mbps 10BASE T is the name given to the Ethernet protocol that runs over Twisted Pair TP cable at 10Mbps 100BASE TX is the name given to the Fast Ethernet protocol that runs over Twisted Pair TP cable at 100Mbps A Network Loop occurs when two pieces of network equipment are connected by more than one path A Segment is the length of cable connected to a port Packets are the units of information your workstations and other equipment send to each other over the network A Frame is the data part of the packet and can be Unicast sent to a single device Multicast sent to multiple devices or Broadcast sent to all devices Bandwidth refers to the amount of network traffic the network can hold at any one time information capacity measured in bits per second bps Workstations or applications that use the network heavily are referred to as using high bandwidth these are usually users who do a lot of graphical or multi media work across the network Fast Ethernet has a higher bandwidth than Ethernet so it can cope with larger amounts of traffic which results in faster operation In a Half Duplex link information can flow in either direc
13. nty or not SOFTWARE 3Com warrants that the software programs licensed from it will perform in substantial conformance to the program specifications therefor for a period of ninety 90 days from the date of purchase from 3Com or its Authorized Reseller 3Com warrants the media containing software against failure during the warranty period No updates are provided 3Com s sole obligation with respect to this express warranty shall be at 3Com s discretion to refund the purchase price paid by Customer for any defective software products or to replace any defective media with software which substantially conforms to 3Com s applicable published specifications Customer assumes responsibility for the selection of the appropriate applications program and associated reference materials 3Com makes no warranty or representation that its software products wil work in combination with any hardware or applications software products provided by third parties that the operation of the software products will be uninterrupted or error free or that all defects in the software products will be corrected For any third party products listed in the 3Com software product documentation or specifications as being compatible 3Com will make reasonable efforts to provide compatibility except where the non compatibility is caused by a bug or defect in the third party s product STANDARD WARRANTY SERVICE Standard warranty service for hardware products may be ob
14. ny connections to the unit and locate it over the screw heads When in line gently push the unit on to the wall and move it downwards to secure When making connections be careful not to push the unit up and off the wall Connecting Workstations and Other Equipment to Your Hub A WARNING Ensure you have read the Important Safety Information section carefully before you start ACHTUNG Versichern Sie sich daB Sie den Abschnitt mit den wichtigen Sicherheitshinweisen gelesen haben bevor Sie das Ger t benutzen AVERTISSEMENT Assurer que vous avez lu soigneusement la section de L information de S curit Importante avant que vous commenciez CAUTION The equipment connected to the Hub must be set to operate in auto negotiate or half duplex mode Connecting workstations and other equipment to your Hub is easy To connect a workstation to any of the Hub s ports use a straight through TP cable Refer to Twisted Pair TP Cables on page 3 for further information If you are using port 8 to connect a workstation ensure the MDI MDIX switch is set to MDIX out TP cables are very easy to use To connect a cable simply slot the connector into the appropriate RJ45 port When the connector is fully in its latch locks it in place To disconnect the cable push the connector s latch in and remove it The Hub detects all port connections so you can start using your network immediately If you need more ports
15. ork loop Examine your connections and remove the loop Each piece of equipment needs only one connection to your Hub Link between the Hub and another OfficeConnect hub not working Check your connections follow the information given in the Connecting Another OfficeConnect Hub section on page 5 It is likely that an MDI MDIX switch is incorrectly set Alert LED continuously lit There is a problem with the network Check the Port Status LEDs to try to identify the port that is causing the problem If one of the Port Status LEDs is flashing that port has partitioned probably due to a network loop Examine your connections and remove the loop Each piece of equipment needs only one connection to your Hub If you cannot identify such a port remove the port connections one at a time waiting a few seconds between each port If the Alert LED goes off there is either a network loop see above or an excessive amount of traffic on that port connection Check the Network Utilization LEDs to see if the network is heavily loaded over 80 Some pieces of network equipment operate by sending out frames regularly Refer to the documentation that accompanies the piece of network equipment If the Alert LED is still lit after removing all of your connections there may be a problem with your Hub Power it off wait about 5 seconds and then power it on If the Alert LED comes back on continuously contact your supplier 33 VA 58
16. pbs the corresponding LED in the lower row is on If neither LED is on check your connections T CAUTION Do not power the Hub off and on quickly Wait about 5 seconds between power cycles Spot Checks At frequent intervals visually check that m The Alert LED is off this is the best way to find out if there are problems with your network mw Case vents are not obstructed m Cabling is secure and not pulled taut If you suspect a problem refer to Problem Solving on page 7 IMPORTANT SAFETY INFORMATION WARNING Warnings contain directions that you must follow for your personal safety Follow all instructions carefully Please read the following information carefully before installing the OfficeConnect unit Exceptional care must be taken during installation and removal of the unit Only stack the OfficeConnect unit with other OfficeConnect units Only use the power adapter that is supplied with the unit to ensure compliance with international safety standards It is essential that the power outlet is located near the unit and is accessible You can only remove power to the OfficeConnect unit by disconnecting the power adapter from the unit or from the socket outlet This unit operates under SELV conditions Safety Extra Low Voltage according to IEC 950 the conditions of which are maintained only if the equipment to which it is connected is also operational under SELV There are no user replaceable fuses o
17. ps to secure the other side To remove a clip hold the units firmly with one hand and hook the first finger of your other hand around the back of the clip Use reasonable force to pull it off Wall mounting screw hole guide 142 mm 5 6 in Positioning Your OfficeConnect Hub When installing your Hub ensure gm Itis out of direct sunlight and away from sources of heat m Cabling is away from power lines fluorescent lighting fixtures and sources of electrical noise such as radios transmitters and broadband amplifiers m Water or moisture cannot enter the case of the unit gm Air flow around the unit and through the vents in the side of the case is not restricted We recommend you provide a minimum of 25mm 1in clearance Wall Mounting the OfficeConnect Hub CAUTION Only wall mount single units Do not wall mount stacked units There are two slots on the underside of the Hub which are used for wall mounting You can mount the unit with the LEDs facing upwards or downwards to suit your needs When wall mounting the unit ensure that it is within reach of the power outlet You need two suitable screws Ensure that the wall you are going to use is smooth flat dry and sturdy Make two screw holes which are 142mm 5 6in apart Use the guide at the top of this page to mark the position of the holes Fix the screws into the wall leaving their heads 3mm 0 12in clear of the wall surface Remove a
18. r user serviceable parts inside the unit If you have a physical problem with the unit that cannot be solved with problem solving actions in this guide contact your supplier Disconnect the power adapter before moving the unit WARNING Twisted Pair RJ45 ports These are RJ45 data sockets They cannot be used as telephone sockets Only connect RJ45 data connectors to these sockets Power Cord Set This must be approved for the country where it is used USA and The cord set must be UL approved and CSA certified Canada The minimum specification for the flexible cord is No 18 AWG Type SV or SJ 3 conductor The cord set must have a rated current capacity of at least 10A The attachment plug must be an earth grounding type with a NEMA 5 15P 15A 125V or NEMA 6 15P 15A 250V configuration Denmark The supply plug must comply with section 107 2 D1 standard DK2 1a or DK2 5a Switzerland The supply plug must comply with SEV ASE 1011 ACHTUNG Die Warnungen enthalten Anweisungen die Sie zur eigenen Sicherheit zu befolgen haben Lesen Sie bitte die folgenden Informationen sorgf ltig durch bevor Sie das Ger t einbauen Auf besondere Vorsicht mu w hrend des Ein und Ausbaus des Ger tes geachtet werden Stapeln Sie das Ger t nur mit anderen OfficeConnect Ger tes zusammen Verwenden Sie nur das mit dem Ger t mitgelieferte Netzteil um die internationalen Sicherheitsstandards zu erf llen Die Netzsteckdose m
19. simply add another OfficeConnect hub Connecting Another OfficeConnect Hub You may wish to connect another OfficeConnect hub to your Dual Speed Hub 8 Alternatively you may wish to add your Hub to an existing 10Mbps network When extending your network you should be aware of the configuration rules given below gt If you connect two Dual Speed Hub 8 units directly together the link between them operates at 100Mbps Fast Ethernet 100Mbps Configuration Rules The Dual Speed Hub 8 is a Class Il hub You can connect directly two Class Il Fast Ethernet hubs Class Fast Ethernet hubs cannot be connected directly to other Fast Ethernet hubs The total length of cable A B C below between two workstations or between a workstation and a non repeater piece of equipment such as a switch must not exceed 205m 672ft Each cable A B or C must not exceed 100m 328ft 3Com recommends that the cable B between the Fast Ethernet hubs is no longer than 5m 16 4ft This allows the maximum hub to workstation cable length A or C of 100m 328ft to be used as shown in the example 100Mbps link Workstation Workstation Example 100m 328ft 5m 16 4ft 100m 328ft IS S gt lt S gt Dual 100Mbps X Workstation Speed Hub Workstation Hub 8 Configuration Rules and Example of a Fast Ethernet 100Mbps Network Ethernet 10Mbps Configuration Rules You can connect a ma
20. tained by delivering the defective product accompanied by a copy of the dated proof of purchase to 3Com s Corporate Service Center or to an Authorized 3Com Service Center during the applicable warranty period Standard warranty service for software products may be obtained by telephoning 3Com s Corporate Service Center or an Authorized 3Com Service Center within the warranty period Products returned to 3Com s Corporate Service Center must be pre authorized by 3Com with a Return Material Authorization RMA number marked on the outside of the package and sent prepaid insured and packaged appropriately for safe shipment The repaired or replaced item will be shipped to Customer at 3Com s expense not later than thirty 30 days after receipt of the defective product by 3Com WARRANTIES EXCLUSIVE IF A 3COM PRODUCT DOES NOT OPERATE AS WARRANTED ABOVE CUSTOMER S SOLE REMEDY FOR BREACH OF THAT WARRANTY SHALL BE REPAIR REPLACEMENT OR REFUND OF THE PURCHASE PRICE PAID AT 3COM S OPTION TO THE FULL EXTENT ALLOWED BY LAW THE FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ARE IN LIEU OF ALL OTHER WARRANTIES TERMS OR CONDITIONS EXPRESS OR IMPLIED EITHER IN FACT OR BY OPERATION OF LAW STATUTORY OR OTHERWISE INCLUDING WARRANTIES TERMS OR CONDITIONS OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND SATISFACTORY QUALITY 3COM NEITHER ASSUMES NOR AUTHORIZES ANY OTHER PERSON TO ASSUME FOR IT ANY OTHER LIABILITY IN CONNECTION WITH THE
21. ted Rights Legend Use duplication or disclosure by the Government is subject to restrictions as set forth in subparagraph c 1 ii for resticted Rights in Technical Data and Computer Software clause at 48 C F R 52 227 7013 3Com Centre Boundary Way Maylands Park South Hemel Hempstead Herts HP2 7YU U K For civilian agencies Restricted Rights Legend Use reproduction or disclosure is subject to restrictions set forth in subparagraph a through d of the Commercial Computer Software Restricted Rights Clause at 48 C F R 52 227 19 and the limitations set forth in 3Com Corporation s standard commercial agreement for the software Unpublished rights reserved under the copyright laws of the United States If there is any software on removable media described in this documentation it is furnished under a license agreement included with the product as a separate document in the hard copy documentation or on the removable media in a directory file named LICENSE TXT If you are unable to locate a copy please contact 3Com and a copy will be provided to you Unless otherwise indicated 3Com registered trademarks are registered in the United States and may or may not be registered in other countries 3Com and OfficeConnect are registered trademarks of 3Com Corporation Other brand and product names may be registered trademarks or trademarks of their respective holders 3 6 PROBLEM SOLVING The Hub has been designed to aid you when dete
22. tion but not in both directions simultaneously Before You Start Your OfficeConnect Dual Speed Hub 8 comes with One power adapter for use with the Hub One power cord A Warranty Registration card for you to fill out and return Four rubber feet Four stacking clips An OfficeConnect Product Range sheet This guide Workstation Connections To connect workstations or other equipment such as servers to your Hub you need One 10BASE T 10 100BASE TX or wy 2 100BASE TX adapter card Y for each workstation IS gt 3Com produce a range wall A of easy to install network adapters which provide your workstation with a suitable connection One suitable TP cable for each workstation In order to comply with the 10BASE T standard ports designed for workstation connections have been marked with the graphical symbol x This denotes a crossover in the port s internal wiring for example 1X 2X 3X You also need a network operating system running on your workstations Twisted Pair TP Cables To connect your workstations and other equipment to the Hub use straight through TP cables with RJ45 connectors all OfficeConnect products use RJ45 type connectors A straight through cable is one where each pin of one connector is connected to the same pin of the other connector Cables can be shielded screened or unshielded we recommend that you use shielded cable Cables used for 100BASE TX or 10
23. u sich in unmittelbarer N he des Ger tes befinden und frei zug nglich sein Sie k nnen das Ger t nur spannungsfrei schalten indem Sie das Steckernetzteil aus der Netzsteckdose ziehen oder die Verbindung zum Ger t unterbrechen Dieses Ger t arbeitet mit SELV Spannung Safety Extra Low Voltage Sicherheitskleinspannung gem IEC950 Diese Bedingungen werden nur eingehalten wenn die Ger te mit denen des Ger tes verbunden ist ebenfalls mit SELV Spannung arbeiten Es sind keine von dem Benutzer zu ersetzende oder zu wartende Teile in dem Ger t vorhanden Wenn Sie ein Problem mit dem Ger t haben das nicht mittels der Fehleranalyse in dieser Anleitung behoben werden kann setzen Sie sich mit Ihrem Lieferanten in Verbindung Bevor das Ger t ausgebaut wird ist das Netzteil zu ziehen ACHTUNG Gedrehte paarfache RJ45 Anschl sse Es sind RJ45 DatenanschluBbuchsen Sie d rfen nicht als Telefonanschlu verwendet werden Verbinden Sie nur RJ45 Datenstecker mit diesen Anschl ssen AVERTISSEMENT Les avertissements contiennent les instructions que vous devez suivre pour votre s curit personnelle Suivre toutes les instructions avec soin Veuillez lire fond l information suivante avant d installer l appareil Le soin exceptionnel doit tre pris pendant l installation et l enl vement de l appareil Seulement entasser l appareil avec les autres appareils OfficeConnect Seulement utiliser la pi ce de raccordement d al
24. ures mg Reorient or relocate the receiving antenna Increase the separation between the equipment and the receiver m Connect the equipment into an outlet on a circuit different from hat to which the receiver is connected m Consult the dealer or an experienced radio TV technician for help CSA STATEMENT This Class B digital apparatus meets all requirements of the Canadian Interference Causing Equipment Regulations Cet appareil num rique de la classe B respecte toutes les exigences du R glement sur le mat riel brouilleur du Canada CORB ARLRRESERMSAEMM BBS VCCI DRE CED TIABMRRMRECT CORB RERRCHATSCE SEANELTOETRM CORBMIVAPCTL EY RRICELT MASHNSL Vacs CTIE ET Wa AS CHE o TEL RORWEL TFA The user may find the following booklet prepared by the Federal Communications Commission helpful How to Identify and Resolve Radio TV Interference Problems This booklet is available from the U S Government Printing Office Washington DC 20402 Stock No 004 000 00345 4 In order to meet FCC emissions limits this equipment must be used only with cables which comply with IEEE 802 3 LIFETIME LIMITED WARRANTY The duration of the warranty for the OfficeConnect Dual Speed Hub 8 3C 16750 is lifetime including the power adapter Advance hardware exchange is available during the first year from your date of purchase in accordance with 3Com s standard terms and conditions for such service After the first year t
25. ximum of four Ethernet 10Mbps hubs in series between workstations or between a workstation and a non repeater piece of equipment such as a switch Each cable must not exceed 100m 328ft An example is shown below Example 10Mbps 10Mbps Dual 10Mbps 10Mbps A15 Hub Speed Hub Hub Workstation Hub 8 Workstation Example of Ethernet 10Mbps Network Making the Connection to Another Hub You can connect a 10BASE T 100BASE TX or another 10 100BASE TX OfficeConnect hub to any port on the Dual Speed Hub 8 Use the following method 1 Using a straight through cable connect the MDI MDIX port of the Dual Speed Hub 8 to any of the ports on the other hub as shown in the diagram below If using port 8 on the other hub set its MDI MDIX switch to MDIX out 2 Set the MDI MDIX switch for the MDI MDIX port on the Dual Speed Hub 8 to MDI in OfficeConnect Dual Speed Hub 8 OfficeConnect hub Switch set to MDI in Twisted pair cable with RJ45 connectors Maximum length is 100m 328ft Correct Connections for OfficeConnect Hubs Powering Up and Checking Connections When you have connected all the appropriate workstations and other equipment to the Hub power on the Hub For each port with a connection a Port Status LED should be on If the port is operating at 100Mbps the corresponding LED in the upper row of Port Status LEDs is on If the port is operating at 10M

3com 3C16750

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