3Com 3C16710 Switch User Manual
Contents
1. Normal port Tx 15 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 spans 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 and 100BASE TX are the names given to the Ethernet protocol that runs over Twisted Pair TP cable 10BASE T runs at 10Mbps whilst 100BASE TX operates at 100Mbps The OfficeConnect hub uses RJ 45 type connectors for connecting your TP network A Network Loop occurs when two pieces of network eguipment are connected by more than one path Your hub detects this and partitions isolates one of its ports to break the loop 16 A segment is the length of cable connected to a port Packets are the units of information your workstations and other eguipment 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 multi2. probl mes dans ce guide contacter votre fournisseur m D branchez l adaptateur lectrique avant de retirer cet appareil AN AVERTISSEMENT Ports RJ 45 Il s agit de prises femelles blind es de donn es RJ 45 Vous ne pouvez pas les utiliser comme prise de telephone Branchez uniquement des connecteurs de donn es RJ 45 sur ces prises femelles TECHNICAL SUPPORT 3Com provides easy access to technical support information through a variety of services This section describes these services Information contained in this section is correct at time of publication For the most recent information 3Com recommends that you access the 3Com Corporation World Wide Web site Online Technical Services 3Com offers worldwide product support 24 hours a day 7 days a week through the following online systems a World Wide Web site m 3Com Knowledgebase Web Services World Wide Web Site To access the latest networking information on the 3Com Corporation World Wide Web site enter this URL into your Internet browser http www 3com com 22 This service provides access to online support information such as technical documentation and software as well as support options that range from technical education to maintenance and professional services 3Com Knowledgebase Web Services This interactive tool contains technical product information compiled by 3Com expert technical engineers around the globe Located o
3. Support from Your Network Supplier 23 Support from 3Com 23 Returning Products for Repair 26 3Com Corporation Limited Warranty 27 Electromagnetic Compatibility 30 INTRODUCTION Welcome to the world of networking with 3Com In the modern business environment communication and sharing information is crucial Computer networks have proved to be one of the fastest modes of communication but until recently only large businesses could afford the networking advantage The OfficeConnect product range from 3Com has changed this bringing networks to the small office The OfficeConnect Dual Speed Hub 16 is ideal for creating small networks It is compact and attractively designed for desktop use and can be used with other OfficeConnect products This product forms part of the OfficeConnect range which neatly stack together with the OfficeConnect stacking clip The OfficeConnect Dual Speed Hub 16 is an easy to use Class Il hub repeater with sixteen 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 Ethernet hub a Class hub cannot When referring to the OfficeConnect Dual Speed Hub 16 this guide uses the term Hub Each port on the Hub can be connected to either a 10BASE T Ethernet or a 100BASE TX Fast Ethernet device The port senses the speed of the connected equipment and operates a
4. Uplink in Checking Hub 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 10Mpbs the corresponding LED in the lower row is on If neither LED is on check your connections 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 m Case vents are not obstructed m Cabling is secure and not pulled taut 13 Figure 5 Correct Connections for OfficeConnect Hubs OfficeConnect N Dual Speed Hub16 ar OfficeConnect 3 hub i AA Switch set to Uplink in Twisted pair cable with RJ 45 connectors Maximum length is 100m 328ft PROBLEM SOLVING The OfficeConnect Hub has been designed to aid you when detecting 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 o
5. advance notice This offer is not available where prohibited or restricted by law 3Com s Web and Bulletin Board Service are available at no charge and provide software and firmware upgrades a bug list and technical information about 3Com products 28 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 SATISFACTORY QUALITY CORRESPONDENCE WITH DESCRIPTION AND NON INFRINGEMENT ALL OF WHICH ARE EXPRESSLY DISCLAIMED 3COM NEITHER ASSUMES NOR AUTHORIZES ANY OTHER PERSON TO ASSUME FOR IT ANY OTHER LIABILITY IN CONNECTION WITH THE SALE INSTALLATION MAINTENANCE OR USE OF ITS PRODUCTS 3COM SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND EXAMINATION DISCLOSE THAT THE ALLEGED DEFECT OR MALFUNCTION 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 OPEN REPAIR OR MODIFY THE PRODUCT OR ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE OR
6. documentation and the software described herein are provided to you subject to the following All technical data and computer software are commercial in nature and developed solely at private expense Software is delivered as Commercial Computer Software as defined in DFARS 252 227 7014 June 1995 or as a commercial item as defined in FAR 2 101 a and as such is provided with only such rights as are provided in 3Com standard commercial license for the Software Technical data is provided with limited rights only as provided in DFAR 252 227 7015 Nov 1995 or FAR 52 227 14 June 1987 whichever is applicable You agree not to remove or deface any portion of any legend provided on any licensed program or documentation contained in or delivered to you in conjunction with this User Guide Unless otherwise indicated 3Com registered trademarks are registered in the United States and may or may not be registered in other countries 3Com the 3Com logo and OfficeConnect are registered trademarks of 3Com Corporation Santa Clara California m 95052 8145 Microsoft MS DOS Windows and Windows NT are registered trademarks of Microsoft Corporation Novell and NetWare are registered trademarks of Novell Inc All other company and product names may be trademarks of the respective companies with which they are associated Year 2000 Compliance For information on Year 2000 compliance and 3Com products visit the 3Com Year 2000 Web page h
7. 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 Figure 3 Figure 3 Configuration Rules and Example of a Fast Ethernet 100Mbps Network 100Mbps link Workstation Workstation Example 100m 328ft 5m 16 4ft 100m 328ft Dual 100Mbps Workstation Speed Hub Workstation Hub 16 Ethernet 10Mbps Configuration Rules You can connect a maximum 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 in Figure 4 Figure 4 Example of an Ethernet 10Mbps Network Example 10Mbps link Switch ba Seer gt QW USTI ES 10Mbps Dual 10Mbps 10Mbps EL S Hub Speed Hub Hub S Workstation Hub 16 Workstation Making the Connection to Another Hub You can connect a TOBASE T 100BASE TX or another 10 100BASE TX OfficeConnect hub to any port on the Dual Speed Hub 16 Use the following method 1 Using a straight through cable connect the Uplink Normal port of the Dual Speed Hub 16 to any of the ports on the other hub as shown in Figure 5 If using an Uplink Normal port on the other hub set its Uplink Normal switch to Normal out 2 Set the Uplink Normal switch for the Uplink Normal port on the Dual Speed Hub 16 to
8. initial warranty period whichever is longer SOFTWARE 3Com warrants that each software program licensed from it will perform in substantial conformance to its program specifications 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 under this express warranty shall be at 3Com s option and expense to refund the purchase price paid by Customer for any defective software product or to replace any defective media with software which substantially conforms to applicable 3Com published 27 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 will meet Customer s requirements or 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 or from use of the softw
9. 0Mbps bottom row 10Mbps Indicate how much the 100Mbps and 10Mbps segments of your network are being used E LO O 100M gt Collision ci Alert Power 10M ES Port Status ___ 1 2 3 9 10 11 Green 100M Yellow 10M Flash Partitioned Network Utilization 100M 1 2 3 6 12 25 50 80 10M OfficeConnect Dual Speed Hub 16 JUL Dual Speed Hub 16 Rear iN mmm 5V DC 4A MAX mL UU 10 100BASE TX 8X 2 0 Uplink Normal 16 LI Li N LI Li gt Power Adapter socket Only use the power adapter that is supplied with this OfficeConnect Dual Speed Hub 16 Do not use any other adapter Uplink Normal switch Affects the operation of port 16 If you are connecting another hub to port 16 set to Uplink in otherwise set to Normal out Refer to the Connecting Another OfficeConnect Hub section Sixteen 10 100BASE TX ports Use suitable TP cable with RJ 45 connectors You can connect the Hub to any workstation or other equipment that has a 10BASE T or 100BASE TX port Each port is capable of autosensing for 10Mbps or 100Mbps operation Before You Start Your OfficeConnect hub comes with m One power adapter for use with the OfficeConnect hub m A Product Registration card for you to fill out a
10. BY ACCIDENT FIRE LIGHTNING OTHER HAZARDS OR ACTS OF GOD 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 CONSEOUENTIAL 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 DISCLAIMER Some countries states or provinces do not allow the exclusion or limitation of implied warranties or the limitation of incidental 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 When the implied warranties are not allowed to be excluded in their entirety they will be limited to the duration of the applicable written warranty This warranty gives you specific legal rights which may vary dependi
11. Packaging The packaging for this product is fully recyclable It has a recycled post consumer waste content of at least 40 by weight and no heawy metal content IMPORTANT SAFETY INFORMATION AN WARNING Warnings contain directions that you m There are no user replaceable fuses or user serviceable must follow for your personal safety Follow all parts inside the hub If you have a physical problem with directions carefully the unit that cannot be solved with problem solving You must read the following safety information actions in this guide contact your supplier carefully before you install or remove the unit m Disconnect the power adapter before moving the unit m Exceptional care must be taken during installation and AN WARNING RJ 45 ports These are shielded RJ 45 removal of the unit data sockets They cannot be used as telephone m Only stack the OfficeConnect hub with other sockets Only connect RJ 45 data connectors to these OfficeConnect units sockets To ensure compliance with international safety standards only use the power adapter that is supplied with the unit m The socket outlet must be near to the unit and easily accessible You can only remove power from the unit by disconnecting the power cord from the outlet m This unit operates under SELV Safety Extra Low Voltage conditions according to IEC 950 The conditions are only maintained if the equipment to which it is connected also operates under SELV conditi
12. and sturdy Make two screw holes which are 142mm 5 6in apart Use the template at the back of this guide 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 any 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 N CAUTION Only wall mount single units do not wall mount stacked units Also available from 3Com is the OfficeConnect Mounting Unit part number 3C16765 This allows you to firmly secure a stack of OfficeConnect devices to the desktop or onto a shelf in a rack Connecting Workstations and Other Equipment to Your Hub AN WARNING Please read the Important Safety Information section before you start WARNHINWEIS Bitte lesen Sie den Abschnitt Wichtige Sicherheitsinformationen sorgf ltig durch bevor Sie das Ger t einschalten AVERTISSEMENT Veuillez lire attentivement la section Consignes importantes de securite avant de mettre en route CAUTION The equipment connected to the Hub must be set to operate in auto negotiate or half duplex mode A Connecting workstations and other eguipment to your Hub is easy To connect a workstation to any of the Hub ports use a straight through TP cable Refer to Twisted Pair TP Cables on page 8 for f
13. are product not in accordance with 3Com s published specifications or user manual YEAR 2000 WARRANTY In addition to the Hardware Warranty and Software Warranty stated above 3Com warrants that each product sold or licensed to Customer on and after January 1 1998 that is date sensitive will continue performing properly with regard to such date data on and after January 1 2000 provided that all other products used by Customer in connection or combination with the 3Com product including hardware software and firmware accurately exchange date data with the 3Com product with the exception of those products identified at 3Com s Web site http www 3com com products yr2000 html as not meeting this standard If it appears that any product that is stated to meet this standard does not perform properly with regard to such date data on and after January 1 2000 and Customer notifies 3Com before the later of April 1 2000 or ninety 90 days after purchase of the product from 3Com or its authorized reseller 3Com shall at its option and expense provide a software update which would effect the proper performance of such product repair such product deliver to Customer an equivalent product to replace such product or if none of the foregoing is feasible refund to Customer the purchase price paid for such product Any software update or replaced or repaired product will carry a Year 2000 Warranty for ninety 90 days after purchase or until Ap
14. efer to Electromagnetic Compatibility on page 30 for conditions of operation t ENVIRONMENTAL STATEMENTS It is the policy of 3Com Corporation to be environmentally friendly in all operations To uphold our policy we are committed to Establishing environmental performance standards that comply with national legislation and regulations Conserving energy materials and natural resources in all operations Reducing the waste generated by all operations Ensuring that all waste conforms to recognized environmental standards Maximizing the recyclable and reusable content of all products Ensuring that all products can be recycled reused and disposed of safely Ensuring that all products are labelled according to recognized environmental standards Improving our environmental record on a continual basis 18 End Of Life Statement 3Com processes allow for the recovery reclamation and safe disposal of all end of life electronic components Regulated Materials Statement 3Com products do not contain any hazardous or ozone depleting material Environmental Statement about the Documentation The documentation for this product is printed on paper that comes from sustainable managed forests it is fully biodegradable and recyclable and is completely chlorine free The varnish is environmentally friendly and the inks are vegetable based with a low heawy metal content Environmental Statement about the Product
15. gnostic error messages m Details about recent configuration changes if applicable Here is a list of worldwide technical telephone support numbers Country Telephone Number Country Telephone Number Asia Pacific Rim Australia 1 800 678 515 PR of China 10800 61 00137 or Hong Kong 800 933 486 021 6350 1590 India 61 2 9937 5085 Singapore 800 6161 463 Indonesia 001 800 61 009 S Korea Japan 0031 61 6439 From anywhere in S Korea 00798 611 2230 Malaysia 1800 801 777 From Seoul 0 2 3455 6455 New Zealand 0800 446 398 Taiwan R O C 0080 611 261 Pakistan 61 2 9937 5085 Thailand 001 800 611 2000 Philippines 1235 61 266 2602 Europe From anywhere in Europe call 31 0 30 6029900 phone 31 0 30 6029999 fax Europe South Africa and Middle East From the following countries you may use the toll free numbers Austria Belgium Denmark Finland France Germany Hungary Ireland Israel Italy 0800 297468 Netherlands 0800 71429 Norway 800 17309 Poland 0800 113153 Portugal 0800 917959 South Africa 0800 1821502 Spain 00800 12813 Sweden 1800 553117 Switzerland 1800 9453794 U K 1678 79489 24 0800 0227788 800 11376 00800 3111206 0800 831416 0800 995014 900 983125 020 795482 0800 55 3072 0800 966197 Country Telephone Number Country Telephone Number Latin America Argentina Brazil Chile Colombia AT amp T 800 666 5065 0800 13 3266 1230 020 0645 98012 2127 Mexico Peru Puer
16. inal product to 3Com within fifteen 15 days after shipment of the replacement 3Com will charge Customer for the replacement product at list price 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 warranty or not ADDITIONAL SERVICES Telephone Support This OfficeConnect product comes with telephone technical support for ninety 90 days The ninety 90 day period begins on the date of Customer s product purchase The telephone technical support is available from 3Com from 9 a m to 5 p m local time Monday through Friday excluding local holidays Telephone technical support is limited to the 3Com products designated above and may include assistance with installation product specific configuration and identification of equipment problems Please refer to the Technical Support appendix in the User Guide for telephone numbers Response to requests for telephone technical support will be in the form of a return call from a 3Com representative by close of business the following business day To qualify for this 90 days of telephone technical support you must register on the 3Com Web site at http support 3Com com index htm and provide your date of purchase product number and serial number 3Com reserves the right to modify or cancel this telephone support offering at any time without
17. n the World Wide Web at http knowledgebase 3com com This service gives all 3Com customers and partners complementary round the clock access to technical information on most 3Com products Support from Your Network Supplier If you require additional assistance contact your network supplier Many suppliers are authorized 3Com service partners who are qualified to provide a variety of services including network planning installation hardware maintenance application training and support services When you contact your network supplier for assistance have the following information ready m Product model name part number and serial number m A list of system hardware and software including revision levels m Diagnostic error messages m Details about recent configuration changes if applicable If you are unable to contact your network supplier see the following section on how to contact 3Com 23 Support from 3Com If you are unable to obtain assistance from the 3Com online technical resources or from your network supplier 3Com offers technical telephone support services To find out more about your support options call the 3Com technical telephone support phone number at the location nearest you When you contact 3Com for assistance have the following information ready m Product model name part number and serial number m A list of system hardware and software including revision levels m Dia
18. nbuchsen Sie k nnen nicht als Telefonanschlu buchsen verwendet werden An diesen Buchsen d rfen nur RJ 45 Datenstecker angeschlossen werden CONSIGNES IMPORTANTES DE SECURITE AVERTISSEMENT Les avertissements pr sentent des consignes que vous devez respecter pour garantir votre s curit personnelle Vous devez respecter attentivement toutes les consignes Nous vous demandons de lire attentivement les consignes suivantes de securite avant d installer ou de retirer l appareil A Faites tr s attention lors de l installation et de la d pose du groupe Seulement entasser le moyer avec les autres moyeux OfficeConnects Pour garantir le respect des normes internationales de s curit utilisez uniquement l adaptateur lectrique remis avec cet appareil La prise secteur doit se trouver proximit de l appareil et son acc s doit tre facile Vous ne pouvez mettre l appareil hors circuit qu en d branchant son cordon lectrique au niveau de cette prise L appareil fonctionne une tension extr mement basse de s curit qui est conforme la norme CEI 950 Ces conditions ne sont maintenues que si l quipement auquel il est raccord fonctionne dans les m mes conditions 21 m li n y a pas de parties remplaceables par les utilisateurs ou entretenues par les utilisateurs l int rieur du moyeu Si vous avez un probl me physique avec le moyeu qui ne peut pas tre r solu avec les actions de la r solution des
19. nd return m Four rubber feet m A stacking clip m Two unit labels and eight cable ties m An OfficeConnect Network Assistant CD ROM The extra parts mentioned in the next section are not supplied with the hub Workstation Connections To connect workstations or other equipment to your hub you need 1 One 10BASE T 10 100BASE TX or R 3 100BASE TX adapter card N for each workstation HE 3Com produce a range of Ns A easy to install network adapters which provide your workstation with a suitable connection I 2 An operating system for example Netware or Windows 95 98 with network support configured running on your workstations 3 One suitable TP cable for each workstation gt 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 Twisted Pair TP Cables To connect your workstations and other equipment to the Hub use straight through TP cables with RJ 45 connectors all OfficeConnect products use RJ 45 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 100BASE TX connections must be data grade Category 5 Your supplie
20. ne 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 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 14 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 afte
21. ng on local law GOVERNING LAW This Limited Warranty shall be governed by the laws of the State of California U S A excluding its conflicts of laws principles and excluding the United Nations Convention on Contracts for the International Sale of Goods 3Com Corporation 5400 Bayfront Plaza Santa Clara CA 95054 408 326 5000 29 ELECTROMAGNETIC COMPATIBILITY 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 and the Canadian Department of Communications Equipment Standards entitled Digital Apparatus ICES 003 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 interference to radio or television 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 m Reorient the receiving antenna m Relocate the equipment with respect to the receiver m Move the equipment away from the receiver m Plug the equipment into a different outlet so
22. nm OfficeConnect Dual Speed Hub 16 3 User Guide 3C16751A 3Com Corporation m 5400 Bayfront Plaza m Copyright 1999 3Com Technologies 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 written 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 term or condition of any kind either implied or expressed including but not limited to the implied warranties terms or conditions of merchantability satisfactory guality 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 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 or LICENSE TXT If you are unable to locate a copy please contact 3Com and a copy will be provided to you UNITED STATES GOVERNMENT LEGEND If you are a United States government agency then this
23. ons 19 WICHTIGE SICHERHEITSHINWEISE AN WARNHINWEIS Warnhinweise enthalten Anweisungen die Sie zu Ihrer eigenen Sicherheit befolgen m ssen Alle Anweisungen sind sorgf ltig zu befolgen Sie m ssen die folgenden Sicherheitsinformationen sorgf ltig durchlesen bevor Sie das Ger ts installieren oder ausbauen u Bei der Installation und beim Ausbau des Ger ts ist mit h chster Vorsicht vorzugehen m Stapeln Sie das Ger ts nur mit anderen OfficeConnect Ger tes zusammen m Aufgrund von internationalen Sicherheitsnormen darf das Ger t nur mit dem mitgelieferten Netzadapter verwendet werden m Die Netzsteckdose mu in der N he des Ger ts und leicht zug nglich sein Die Stromversorgung des Ger ts kann nur durch Herausziehen des Ger tenetzkabels aus der Netzsteckdose unterbrochen werden m Der Betrieb dieses Ger ts erfolgt unter den SELV Bedingungen Sicherheitskleinstspannung gem IEC 950 Diese Bedingungen sind nur gegeben wenn auch die an das Ger t angeschlossenen Ger te unter SELV Bedingungen betrieben werden 20 Es sind keine von dem Benutzer zu ersetzende oder zu wartende Teile in dem Ger t vorhanden Wenn Sie ein Problem mit dem Switch haben das nicht mittels der Fehleranalyse in dieser Anleitung behoben werden kann setzen Sie sich mit Ihrem Lieferanten in Verbindung Vor dem Ausbau des Ger ts das Netzadapterkabel herausziehen WARNHINWEIS RJ 45 Anschl sse Dies sind abgeschirmte RJ 45 Date
24. peed Hub 16 3C16751A 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 the warranty reverts to 3Com s standard lifetime limited warranty To gualify 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 this hardware product to be free from defects in workmanship and materials under normal use and service for the following length of time from the date of purchase from 3Com or its authorized reseller One 1 year unless otherwise specified above 3Com s sole obligation under this express warranty shall be at 3Com s option and expense to repair the defective product or part deliver to Customer an eguivalent product or part to replace the defective item or if neither of the two foregoing options is reasonably available 3Com may in its sole discretion 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 3Com warrants any replaced or repaired product or part for ninety 90 days from shipment or the remainder of the
25. ple 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 Fast Ethernet has a higher bandwidth than Ethernet so it can cope with larger amounts of traffic which results in faster operation A half duplex link allows information to flow in either direction but not in either direction simultaneously Collisions are part of normal ethernet operation and occur if other network eguipment attempts to transmit at the same time A sudden sustained increase in the number of collisions may indicate a problem with the device DIMENSIONS AND STANDARDS Dimensions and Operating Conditions 33 VA 58 BThU hr power requirement 0 to 40 C 32 to 105 F 5 A operating l 2 1in temperature 0 to 90 non condensing humidity 1kg 2 2 Ib 17 Standards Functional ISO 8802 3 IEEE 802 3 Safety UL 1950 EN 60950 CSA 22 2 950 IEC 950 EMC EN 55022 Class Bt EN 50082 1 FCC Part 15 Class B ICES 003 Class Bt VCCI Class Bt CNS 13438 Class A Environmental EN 60068 IEC 68 Category 5 screened cables must be used to ensure compliance with the Class B requirements of this standard The use of unscreened cables category 3 or category 5 complies with the Class A requirements R
26. r removing all of your connections there may be a problem with your Hub Turn off the power wait about 5 seconds and then power on the hub If the Alert LED comes back on continuously contact your supplier Port Status LED flashing The port is 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 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 11 It is likely that an Uplink Normal switch is incorrectly set 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 8 Also check that the equipment connected to the Hub is powered on operating correctly and contains the correct type of connection Refer to Figure 6 to compare the wiring of a straight through and a crossover cable Figure 6 Straight through Cable Crossover Cable Normal port Rx Rx Tx Tx V a Uplink port Rx Tx Normal port Rx Rx Txt Tx V
27. r should stock suitable cables The maximum length of a single cable is 100m 328ft Refer to Fast Ethernet 100Mbps Configuration Rules on page 11 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 Stacking the Units Together The Rubber Feet The four self adhesive rubber feet prevent your hub from moving around on your desk Only stick the feet to the marked areas at each corner of the underside of your hub if you intend to place the unit directly on top of the desk Do not fix the feet if you are going to use the clip The Stacking Clip The blue stacking clip allows you to stack your OfficeConnect units together neatly and securely N CAUTION You can stack up to a maximum of four units Smaller units must be stacked above larger units To fit the clip 1 Place your unit on a flat surface 2 Fit the clip across the top of the unit as shown in Figure 2 picture 1 ensuring that the longer sections of the fastening pieces are pointing downwards 3 Align the fastening pieces over the slots found on each side of the unit 4 Push the clip down gently to secure it ensuring the fastening pieces snap into the slots on the unit To fit another unit 1 Rest the second unit on top of the clip and align it with the front of the unit below 2 Press down gently on the unit to secure it onto
28. ril 1 2000 whichever is later OBTAINING WARRANTY SERVICE Customer must contact a 3Com Corporate Service Center or an Authorized 3Com Service Center within the applicable warranty period to obtain warranty service authorization Dated proof of purchase from 3Com or its authorized reseller may be required 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 and packaged appropriately for safe shipment and it is recommended that they be insured or sent by a method that provides for tracking of the package The repaired or replaced item will be shipped to Customer at 3Com s expense not later than thirty 30 days after 3Com receives the defective product Dead or Defective on Arrival In the event a product completely fails to function or exhibits a defect in materials or workmanship within the first forty eight 48 hours of installation but no later than thirty 30 days after the date of purchase and this is verified by 3Com it will be considered dead or defective on arrival DOA and a replacement shall be provided by advance replacement The replacement product will normally be shipped not later than three 3 business days after 3Com s verification of the DOA product but may be delayed due to export or import procedures When an advance replacement is provided and Customer fails to return the orig
29. t the appropriate speed If you wish to extend an existing Ethernet network into Fast Ethernet adding a Dual Speed Hub 16 can offer a more cost effective migration path than adding both a 100Mbps hub and a 10 100Mbps switch Figure 1 Small Network With OfficeConnect Hub OfficeConnect Dual Speed Hub 16 If you need to connect more workstations simply use the stacking clip to connect another OfficeConnect hub to form a stack CREATING YOUR NETWORK Dual Speed Hub 16 Front gt Alert LED gt Power LED orange green Off when the Hub is operating Indicates that correctly Lit for a short period of the power time after power on for self test supply to the If the LED is continuously lit there Hub is may be a problem Refer to the present Problem Solving section gt Collision LEDs yellow Flash each time a collision is detected on the Hub s 100Mbps or 10Mbps segment Collisions are a normal part of network operation Port Status LEDs green 100Mbps link yellow 10Mbps link If the LED is on the link between the port and the next piece of network eguipment is OK If the LED is off nothing is connected or the connected device is switched off or there is a problem with the connection refer to the Problem Solving section If flashing the port is partitioned possibly due to a network loop gt Network Utilization LEDs green yellow orange top row 10
30. that equipment and receiver are on different branch circuits m Consult the dealer or an experienced radio television technician for help CSA STATEMENT This Class B digital apparatus meets all requirements of the Canadian Interference Causing Equipment Regulations Cet appareil numerique de la classe B respecte toutes les exigences du Reglement sur le mat riel brouilleur du Canada 30 VCCI STATEMENT CORB AMERESER SEATEMNESS VCCI ORE EOS 7 ZA BARRNRE CT CORBI RERHTEATZSIE SANMEL THEI CORBMIVTPT LEV a gt REKE LT BASNSe VaMBe eC TCEMHOVET KRABI D TELUROMRUELTFEU BCIQ STATEMENT Bae EX bi EH gt FY TET PRES EWT gt ETRE He DON PR IM EE ES UE o INFORMATION To THE USER 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 Wall mounting screw hole guide 142mm 5 6in 31 Part No DUA 1675 1AAA02 Published June 1999 32
31. the clip ensuring the fastening pieces fit into the slots on the unit below as shown in Figure 2 picture 2 Figure 2 Stacking Your Units Together Fastening To remove the clip 1 Remove the top unit together with the clip If you hook a finger around one of the the fastening pieces and then pull it gently from out of the slot the clip should come away with the upper unit attached to it 2 Push the clip in the center so it bends towards the base of the unit and then separate once the clip is loose Positioning Your Hub When installing your OfficeConnect hub ensure m It is 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 m 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 25 4 mm 1in clearance 10 Securing Your Hub There are two slots on the underside of the OfficeConnect hub which can be used for wall mounting It is recommended that you mount the hubs with the LEDs facing upwards to prevent dust entering the cooling vents 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
32. to Rico Venezuela 01 800 CARE 01 800 2273 AT amp T 800 666 5065 800 666 5065 AT amp T 800 666 5065 North America 1 800 876 3266 25 Returning Products for Repair Before you send a product directly to 3Com for repair you must first obtain a Return Material Authorization RMA number Products sent to 3Com without authorization numbers will be returned to the sender unopened at the sender s expense To obtain an authorization number call or fax Country Telephone Number Fax Number Country Telephone Number Fax Number 65 543 6500 65 543 6348 31 30 6029900 31 30 6029999 1 408 326 3355 Asia Pacific Rim Europe South Africa and Middle East Latin America 1 408 326 2927 From the following countries you may call the toll free numbers select option 2 and then option 2 Austria Belgium Denmark Finland France Germany Hungary Ireland Israel Italy Netherlands Norway Poland Portugal South Africa Spain Sweden Switzerland U K U S A and Canada 0800 297468 0800 71429 800 17309 0800 113153 0800 917959 0800 1821502 00800 12813 1800553117 1800 9453794 1678 79489 0800 0227788 800 11376 00800 3111206 0800 831416 0800 995014 900 983125 020 795482 0800 55 3072 0800 966197 1 800 876 3266 1 408 326 7120 not toll free 3Com Corporation LIMITED WARRANTY 3Com OfficeConnect Dual Speed Hub 16 The duration of the warranty for the OfficeConnect Dual S
33. ttp 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 document title OfficeConnect Dual Speed Hub 16 User Guide part number DUA1675 1AAA02 and if appropriate the page number Introduction 5 Creating your Network 6 Dual Speed Hub 16 Front 6 Dual Speed Hub 16 Rear 7 Before You Start 8 Workstation Connections 8 Twisted Pair TP Cables 8 Hub Connections 8 Stacking the Units Together 9 The Rubber Feet 9 The Stacking Clip 9 Positioning Your Hub 10 Securing Your Hub 10 Connecting Workstations and Other Equipment to Your Hub 11 Connecting Another OfficeConnect Hub 11 Fast Ethernet 100Mbps Configuration Rules 11 Ethernet 10Mbps Configuration Rules 12 Making the Connection to Another Hub 13 Checking Hub Connections 13 Spot Checks 13 Problem Solving 14 Networking Terminology 16 Dimensions and Standards 17 Dimensions and Operating Conditions 17 Standards 17 Environmental Statements 18 End Of Life Statement 18 Regulated Materials Statement 18 Environmental Statement about the Documentation 18 Environmental Statement about the Product Packaging 18 Important Safety Information 19 Wichtige Sicherheitshinweise 20 Consignes importantes de securite 21 Technical Support 22 Online Technical Services 22 World Wide Web Site 22 3Com Knowledgebase Web Services 22
34. urther information gt If you are using port 16 to connect a workstation ensure the Uplink Normal switch is set to Normal out TP cables are very easy to use To connect a cable simply slot the connector into the appropriate RJ 45 port When the connector is fully in its latch locks it in place To 11 disconnect the cable push the connector latch in and remove it The Hub detects all port connections so you can start using your network immediately If you need more ports simply add another OfficeConnect hub Connecting Another OfficeConnect Hub You may wish to connect another OfficeConnect hub to your Dual Speed Hub 16 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 16 units directly together the link between them operates at 100Mbps Fast Ethernet 100Mbps Configuration Rules The Dual Speed Hub 16 is a Class II hub You can connect directly two Class II Fast Ethernet hubs Class Fast Ethernet hubs cannot be connected directly to other Fast Ethernet hubs The total length of cable A B C 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
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