3Com 3C16790 Switch User Manual
Contents
1. 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 Full duplex operation allows information to be transmitted and received simultaneously and in effect doubles the potential throughput of a link Priority Queuing is the ability of a network to give and maintain certain throughput levels for different applications depending on the priority assigned to that application At excessive loads a packet with a higher priority will take a greater precedence over a lower prioritised packet Automatic MDI MDIX this feature automatically detects which wiring practice that has been followed with regard to the TP cable ie if the TP cable is a straight through wired cable or a crossover wired cable The automatic MDI M DIX feature within the Switch will detect and compensate accordingly DIMENSIONS AND STANDARDS Dimensions and Operating Conditions Power requirement Switch 5 3 5 VA 12 BThU hr Switch 8 5 6 VA 19 12 BThU hr i O to 40 C 32 to 105 F operating temperature 6 6 010 90 6 0 non condensing o humidity Switch 5 0 6 Kg 1 3 Ib Switch 8 0 6 Kg 1 3 Ib2. en 8 08 in 35 35 mm 1 36 in 135 4 mm 5 33 in 19 Standards Functional Safety EMC Environmental ISO 8802 3 IEEE 802 3 802 3u UL 1950 EN 60950 CSA 22 2 950 IEC60950 EN 55022 Class B EN 55024 FCC Part 15 Class B ICES 003 Class B VCCI Class B CNS 13438 Class A EN 60068 IEC 68 Refer to Regulatory Notices on page 30 for conditions of operation ENVIRONMENTAL STATEMENTS It is the policy of 3Com Corporation to be environmentally friendly in all operations To uphold our policy we are committed to m Establishing environmental performance standards that comply with national legislation and regulations m Conserving energy materials and natural resources in all operations m Reducing the waste generated by all operations m Ensuring that all waste conforms to recognized environmental standards sm Maximizing the recyclable and reusable content of all products m Ensuring that all products can be recycled reused and disposed of safely m Ensuring that all products are labelled according to recognized environmental standards m Improving our environmental record on a continual basis 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
3. Connecting 10BASE T and 100BASE TX Networks The 10 100 ports can each be connected to either a LOBASE T or LOOBASE TX network If you have both types of network you can join them together using the Switch allowing all your workstations to communicate Alternatively if you use 10BASE T and want to improve network performance by introducing 100BASE TX technology the Switch protects your existing workstations because it maintains LOBASE T connections to them Before You Start Your OfficeConnect Dual Speed Switch comes with m One power adapter for use with the Switch m Four rubber feet m A stacking clip Unit Connections To connect OfficeConnect units such as hubs and other switches to your Switch you need m One suitable TP cable for each unit Workstation Connections To connect workstations or other equipment such as servers directly to your Switch you need 1 One 10BASE T 100BASE TX or S 3 10 100BASE TX adapter card for each workstation 3Com produce a range of easy to install network adapters which provide your workstation with a 10BASE T or 100BASE TX connection 2 An operating system for example NetWare or Windows 95 98 with network support configured running on your workstations 3 One suitable twisted pair cable for each workstation 10 Twisted Pair TP Cables Cables can be shielded screened or unshielded we recommend that you use shielded cable Cables used for 100BASE
4. TX connections must be data grade Category 5 The maximum length you can use is 100m 328ft 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 stacking clip allows you to stack your OfficeConnect units together neatly and securely 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 3 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 11 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 the clip ensuring the fastening pieces fit into the slots on the unit below as shown in Figure 3 picture 2 Figure 3 Stacking Your Units Together Fastening Piece To remove the clip 1 Remove the top unit toge
5. 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 conditions 21 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 m 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 22 Es sind keine von dem Benutzer zu ersetzende oder zu wartende
6. l phone Branchez OfficeConnects uniquement des connecteurs de donn es RJ 45 sur m Pour garantir le respect des normes internationales de in m s curit utilisez uniquement l adaptateur lectrique remis avec cet appareil m 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 m 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 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 m 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 This service provides access to online support information such as technic
7. 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 Diagnostic error messages m Details about recent configuration changes if applicable Here is a list of woridwide technical telephone support num bers These numbers are correct at the time of publication Refer to the 3Com Web site for updated information Country Telephone Number Asia Pacific Rim Australia Hong Kong India Indonesia Japan Malaysia New Zealand Pakistan Philippines PR of China Singapore S Korea From anywhere in S Korea From Seoul Taiwan RO C Thailand 1 800 678 515 800 933 486 61 2 9937 5085 or 000800 6501111 001 800 61 009 03 5783 1270 1800 801 777 0800 446 398 61 2 9937 5083 1235 61 266 2602 10800 61 00137 or 021 6350 1590 or 00800 0638 3266 800 6161 463 82 2 3455 6455 00798 611 2230 00798 611 2230 0080 611 261 001 800 611 2000 Europe Middle East and Africa From anywhere in these regions call Europe and South Africa From the following countries you may usethe toll free numbers 44 0 1442 435529 phone 44 0 1442 436722 fax Country Telephone Number Austria 0800 297468 Belgium 0800 71429 Denmark 800 17309 Finland 0800 113153 France 0
8. 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 software product not in accordance with 3Com s published specifications or user manual 28 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 conyproducts 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 o
9. s to illuminate The port status LED should turn Green or Yellow for each port that is connected The Duplex LED may or may not illuminate Please refer to pages 5 and 6 Creating your Network for a full description of the LED s If the Port Status LED has not lit after several seconds ensure the connected device is powered the TP cable is not damaged and that it is correctly inserted at both ends You may find a TP cable works when connected to the Switch but doesn t if it is disconnected from the Switch and connected to a different piece of equipment This may be due to the advanced automatic MDI MDIX feature of the Switch that the other equipment may not have Alert LED continuously lit If the Alert LED is lit there is a problem with the network 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 or an excessive amount of broadcast traffic on that port connection Network loop Examine your connections and remove the loop Each piece of equipment needs only one connection to your Switch Excessive amounts of broadcast frames Some pieces of network equipment operate by sending out broadcast 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 Switch Power it off wait about 5 seconds a
10. 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 equivalent 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 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 specifications Customer assumes responsibility for the selection of the appropriate applications program and associated reference materials 3Com makes no warranty or
11. 1416 Central and South 525 201 0075 South Africa 0800 995014 America Spain 900 983125 Sweden 020 795482 Argentina 0810 222 3266 Switzerland 0800 55 3072 Bolivia 511 241 1691 U K 0800 966197 Brazil 0800 133266 or 55 11 5643 2700 U S A and Canada 1 800 NET 3Com 1 408 326 7120 Caribbean 525 201 0004 1 800 638 3266 not toll free Chile 562 240 6200 Enterprise Customers Colombia 525 201 0004 1 800 876 3266 Ecuador 525 201 0004 Mexico 525 201 0004 Paraguay 525 201 0004 Peru 511 241 1691 Uruguay 525 201 0004 Venezuela 525 201 0004 3Com Corporation LIMMED WARRANTY 3Com OfficeConnect Dual Speed Switch 5 Switch 8 The duration of the warranty for the OfficeConnect Dual Speed Switch 5 3C16790 and Switch 8 3C16791 is lifetime including the power adapter The OfficeConnect Dual Speed Switches are covered by a lifetime limited warranty which also includes the power adapter To qualify for the warranty you must submit a registration card or register on line at http support 3com comyregistration frontpg pl The OfficeConnect Dual Speed Switches are covered by a free 90 day telephone support The lifetime limited warranty is not offered where restricted or prohibited by law 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
12. 800 917959 Germany 0800 1821502 Hungary 06800 12813 Ireland 1800 553117 Israel 1800 9453794 Italy 800 8 79489 Luxembourg 0800 3625 Netherlands 0800 0227788 Norway 800 11376 Poland 00800 3111206 Portugal 0800 831416 South Africa 0800 995014 Spain 900 983125 Sweden 020 795482 Switzerland 0800 55 3072 U K 0800 966197 Latin America Brazil 0800 13 3266 Mexico 01 800 849CARE Puerto Rico 800 666 5065 Central and South America AT amp T 800 998 2112 North America 26 1 800 NET 3Com 1 800 638 3266 Enterprise Customers 1 800 876 3266 Fax Number Country Telephone Number Retuming Products for Repair From the following countries you may call the toll free numbers Before you send a product directly to 3Com for repair you select option 2 and then option 2 must first obtain a Return Material Authorization RMA ae Austria 0800 297468 number Products sent to 3Com without authorization Belgium 0800 71429 numbers will be returned to the sender unopened at the Denmark 800 17309 sender s expense Finland 0800 113153 France 0800 917959 To obtain an authorization number call or fax Germany 0800 1821502 Hungary 00800 12813 Ireland 1800 553117 Israel 1800 9453794 Country Telephone Number Fax Number Italy 1678 79489 Asia Pacific Rim 65 543 6500 65 543 6348 Netherlands 0800 0227788 Norway 800 11376 Europe South Africa 31 30 6029900 31 30 Poland 00800 3111206 and Middle East 6029999 Portugal 0800 83
13. 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 heavy metal content Environmental Statement about the Product 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 heavy metal content IMPORTANT SAFETY INFORMATION WARNING Warnings contain directions that you m There are no user replaceable fuses or user serviceable A must follow for your personal safety Follow all parts inside the Switch If you have a physical problem directions carefully with the unit that cannot be solved with problem solving You mutt read the following safety information actions in this guide contact your supplier carer MIN DETTE YOR install ONE nove tne trt m Disconnect the power adapter before moving the unit WARNING RJ 45 ports These are shielded RJ 45 data sockets They cannot be used as telephone m Only stack the Switch with other OfficeConnect units sockets Only connect RJ 45 data connectors to these sockets m Exceptional care must be taken during installation and removal of the unit AN m To ensure compliance with international safety standards only use the power adapter that is supplied with the unit m The socket outlet must
14. ECT CORBI REM CEATS CE SANCUTHETM CORBMIYATPT LEV a YD RRKHELT ANSE SMBS SRCTCEMHVET RRS ICs TELUROMRUELTFEU BCIQ STATEMENT aE tLe E EL EE p ES AAE ETE REg SH a5 E es in Fr LE ve me i re Wall mounting screw hole guide gt 150mm 5 9in Part No DUA1679 0AAAO1 Published February 2001 31
15. ENTIAL 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 depending 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 Intemational Sale of Goods 3Com Corporation 5400 Bayfront Plaza Santa Clara CA 95054 408 326 5000 REGULATORY NOTICES 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
16. 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 ABLE 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 BY ACCIDENT FIRE IGHTNING 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 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 ESS
17. Interface feature it means either a straight through or crossover UTP cable can be used in any Switch port to make the connection to other switches hubs and workstations The switch will automatically detect which wiring practice has been followed and will compensate accordingly 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 PROBLEM SOLVING The Switch 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 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 another OfficeConnect power adapter Do not use any other power adapter with the Switch Port Status LED not lit for a port that has a TP cable connected After connection it may take several seconds for the port status LED
18. OfficeConnect Dual Speed Switch 5 Switch 8 3Com Corporation 5400 Bayfront Plaza m Copyright 2001 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 quality 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 govemment agency then this documentation
19. 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 Anschlusse Dies sind abgeschirmte RJ 45 Datenbuchsen Sie k nnen nicht als Telefonanschlu buchsen verwendet werden An diesen Buchsen d rfen nur RJ 45 Datenstecker angeschlossen werden CONSIGNES IMPORTANTES DE S CURIT AN AVERTISSEMENT Les avertissements pr sentent des m ll n ya pas de parties remplaceables par les utilisateurs consignes que vous devez respecter pour garantir ou entretenues par les utilisateurs l int rieur du moyeu votre s curit personnelle Vous devez respecter Si vous avez un probl me physique avec le moyeu qui ne attentivement toutes les consignes peut pas tre r solu avec les actions de la r solution des Nous vous demandons de lire attentivement les probl mes dans ce guide contacter votre fournisseur consignes suivantes de s curit avant d installer ou de m Debranchez l adaptateur lectrique avant de retirer cet retirer l appareil appareil m Faites tr s attention lors de l installation et de la d pose AVERTISSEMENT Ports RJ 45 Il s agit de prises du groupe femelles blind es de donn es RJ 45 Vous ne pouvez m Seulement entasser le moyer avec les autres moyeux pas les utiliser comme prise de t
20. al documentation and software as well as 24 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 on 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 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
21. and attractively designed for desktop use The Switch is part of the OfficeConnect range which neatly stack together with the OfficeConnect Stacking Clip Figure 1 Small Network with OfficeConnect Dual Speed Switch Circle Shows Units Clipped Together 10BASE T OfficeConnect hub OfficeConnect Switch 100BASE TX OfficeConnect hub The 3C16790 has five 10 100BASE TX ports while the 3C16791 has eight 10 100BASE TX ports This allows you to set up a network with both 10BASE T and 100BASE TX hubs and workstations CREATING YOUR NETWORK Dual Speed Switch 5 Front Alert LED If the Alert LED is off the unit is operating correctly After power on the Alert LED remains lit orange for a short period of time while performing a self test If it is continuously lit there may be a problem Refer to the Problem Solving section Power LED If the Power LED is lit green the power supply to the Switch is present Port Status and Activity LEDs If the Port Status LED is off there is nothing connected to the port or the connected device is turned off or there may be a problem with the connectivity refer to the Problem Solving section If the LED is green the speed of the link to the connected device is at 100 Mbps 100BASE Tx If the LED is yellow the speed of the link to the connected device is at 10 Mbps 10BASE T The LED will flash to indicate traffic is passing through that po
22. 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 asa commercial item as defined in FAR 2 101 a and as such is provided with only such rights as are provided in 3Com s 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 and OfficeConnect are registered trademarks of 3Com Corporation The 3Com logo is a trademark 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 The OfficeConnect Dual Speed Switches are covered by a lifetime limited warranty which also i
23. 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 tuming 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 Plug the equipment into a different outlet so that equipment and receiver are on different branch circuits m Consult the dealer or an experienced radio television technician for help 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 Goverment 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 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 VCCI STATEMENT CORB AMERESER SATEMNESS VCCI ORE BOS TIA BARRNHR
24. g used and will compensate if required The units will then Auto negotiate to determine the fastest possible link soeed between them This may take a few seconds and the outcome will be reflected in the LED s on the front of the Switch D gt If the equipment connected to the Switch does not support auto negotiation or if it has been disabled it must be configured to operate in half duplex mode The Switch detects all port connections so you can start using your network immediately If you need more ports simply add another OfficeConnect unit Connecting OfficeConnect Units to Your Switch You can increase the number of workstations that can connect to your network by adding OfficeConnect units such as hubs and other switches You can connect either a 10BASE T or a 100BASE TX OfficeConnect unit to each port of the Switch Checking Unit Connections When you have connected all your units power on the units and the Switch The Port Status LEDs for the ports you have used on both the units and the Switch should be on If they are not check your connections Figure 4 Correct Connections for an OfficeConnect Hub OfficeConnect Switch Io OfficeConnect Q Hub 4 Twisted pair cable ei with RJ 45 connectors Maximum length is 100m 328ft There is no uplink normal push switch that is usually associated with OfficeConnect products Instead the product has an automatic MDI MDIX Media Dependant
25. guration and identification of equipment problems Please refer to the Technical Support appendix in the User Guide for telephone numbers Respons to requests for telephone technical support will be in the form of a retum 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 conyindex 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 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 finmware upgrades a bug list and technical information about 3Com products 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
26. n 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 April 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 retumed to 3Com s Corporate Service Center must be pre authorized by 3Com with a Retum 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
27. n then selectively pass on any information by transmitting the traffic from the relevant port only instead of all ports like a repeater hub This operation is called switching The Switch effectively divides up your network localizing the network traffic and passing on traffic as necessary as shown in Figure 2 If you have workstations that communicate frequently in the same part of the network traffic between them is not passed on unnecessarily to the remainder of the network thereby reducing the load If you have any high performance workstations that require a lot of bandwidth connect them directly to the Switch The Switches have an additional new feature to aid network performance at times of excessive load It is called Priority Queuing When a packet is received the Switch will examine it to see if it has been priority encoded If it has the Switch will then read the priority level and determine whether it should be directed through the normal or high priority channel This feature can be useful for example during excessive loads when one type of traffic may require priority over another The Switch is configured to to comply with VLAN priority tagged frames and IP TOS DSCP priority encoded frames Figure 2 The Switch Separates Your Network and Controls the Information Effectively 10BASE T OfficeConnect hub OfficeConnect Switch 100BASE TX OfficeConnect 100BASE TX High performance workstation
28. ncludes the power adapter To qualify for the warranty you must submit a registration card or register on line at http support 3com com registration frontpg pl The OfficeConnect Dual Speed Switches are covered by a free 90 day telephone support The lifetime limited warranty is not offered where restricted or prohibited by law Please e mail any comments about this document to 3Com at pddtechpubs_ comments 3Com com Please include the document title OfficeConnect Dual Speed Switch 5 Switch 8 User Guide part number DUA1679 0AAAO01 and if appropriate the page number Introduction 4 Creating your Network 4 Dual Speed Switch 4 Front 5 Dual Speed Switch 8 and Dual Speed 16 Front 6 All Units Rear 7 How the Switch Can Be Used 8 Switching 8 Connecting 10BASE T and 100BASE TX Networks 9 Before You Start 9 Unit Connections 9 Workstation Connections 10 Twisted Pair TP Cables 10 Stacking the Units Together 11 The Rubber Feet 11 The Stacking Clip 11 Positioning Your Switch 12 Securing Your Switch 12 Connecting Workstations and Other Equipment to Your Switch 13 Connecting OfficeConnect Units to Your Switch 13 Checking Unit Connections 14 Spot Checks 14 Problem Solving 15 Networking Terminology 17 Dimensions and Standards 19 Dimensions and Operating Conditions 19 Standards 19 Environmental Statements 20 End Of Life Statement 20 Regulated Materials Statement 20 Environmental Statement about the Documentation 20 Envir
29. nd then power it on If the Alert LED comes back on continuously contact your supplier 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 100M bps 10BASE T and 100BASE TX are the names given to the Ethernet protocol that runs over Twisted Pair TP cable LOBASE T runs at 10Mbps whilst 100BASE TX operates at 100Mbps The OfficeConnect Hubs and Switches Use RJ 45 type connectors to connect your TP network A network loop occurs when two pieces of network equipment are connected to each other by two seperate connections 17 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
30. onmental Statement about the Product Packaging 20 Important Safety Information 21 Wichtige Sicherheitshinweise 22 Consignes importantes de securite 23 Technical Support 24 Online Technical Services 24 World Wide Web Site 24 3Com Knowledgebase Web Services 24 Support from Your Network Supplier 25 Support from 3Com 25 Returning Products for Repair 27 3Com Corporation Limited Warranty 28 Regulatory Notices 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 As the power of workstations and business applications increases heavier demands are made on the available network bandwidth that if unchecked can lead to performance problems in a hub based setup Installing the OfficeConnect Dual Speed Switch 5 3C16790 or Switch 8 3C16791 allows your network to be segmented so that traffic can be contained effectively reducing the overall load without affecting access to critical resources This guide will use the term Switch when referring to the Dual Speed Switch 5 or Switch 8 The Switch is ideal for use with other OfficeConnect products as shown in Figure 1 It is compact
31. 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 retum the original 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 confi
32. rt Duplex LED s If the Duplex LED is lit yellow the port is in full duplex mode If the LED is off the port is in half duplex mode mn PortStatis m lt Power 1 2 3 4 5 Green 100M Yellow 10M Flash Activity r Dae 1 2 3 4 5 On Full OfficeConnect Dual Speed Switch 5 D Lr Dual Speed Switch 8 Front p Alert LED Power LED gt Port Status and Activity LEDs gt Duplex LED s If the Alert LED is off the unit is If the Power LED If the Port Status LED is off there is nothing connected to If the Duplex LED is lit yellow the port operating correctly is lit green the the port or the connected device is tumed off or there may is in full duplex mode If the LED is off After power on the Alert LED power supply to be a problem with the connectivity refer to the Problem the port is in half duplex mode remains lit orange for a short the Switch is Solving section If the LED is green the speed of the link to period of time while performing a present the connected device is at 100 Mbps 100BASE Tx If the self test If it is continuously lit there LED is yellow the speed of the link to the connected device is may be a problem Refer
33. telephone network Only connect RJ 45 data connectors network telephony systems or network telephones to these sockets Either shielded or unshielded data cables with shielded or unshielded jacks can be connected to these data sockets WARNHINWEIS RJ 45 Anschlusse Diese Porte sind gesch tzte Datensteckdosen Sie d rfen weder wie normale traditionelle Telefonsteckdosen noch f r die Verbindung der Einheit mit einem traditionellem privatem oder ffentlichem Telefonnetzwerk gebraucht werden Nur Rj 45 Datenansclu e Telefonnetzsysteme or Netztelefone an diese Steckdosen anschlie en Entweder gesch tzte oder ungesch tzte Buchsen d rfen an diese Datensteckdosen angeschlossen werden AVERTISSEMENT Ports RJ 45 Ceux ci sont prot g s par des prises de donn es Ils ne peuvent pas tre utilis s comme prises de t l phone conventionnelles standard ni pour la connection de l unit un r seau t l phonique central priv ou public How the Switch Can Be Used Switching When a network of repeater hubs is in operation any information that is sent by the workstations is passed around the whole network regardless of the destination of the information This can result in a lot of unnecessary traffic that can slow the network down The Switch solves this problem because it listens to the network and automatically learns what workstations can be reached through its ports It ca
34. 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 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 Switch 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 s curit avant de mettre en route CAUTION Do not power the Switch off and on quickly Wait about five seconds between power cycles 10BASE T cables are very easy to use To connect a 10BASE T cable simply slot the connector into the relevant RJ 45 port When the connector is fully in its latch locks it into place To disconnect the cable push the connector s latch in and remove it When a TP cable is connected to the Switch at one end and a workstation other equipment at other and both unit are powered the Switch will automtically detect whether a straight or Crossover cable is bein
35. ther 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 Switch When installing your Switch ensure It is out of direct sunlight and away from sources of heat Cabling is away from power lines fluorescent lighting fixtures and sources of electrical noise such as radios transmitters and broadband amplifiers Water or moisture cannot enter the case of the unit 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 Lin clearance 12 Securing Your Switch There are two slots on the underside of the OfficeConnect Switch that can be used for wall mounting It is recommended that you mount the Switch 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 and sturdy Make two screw holes which are 150mm 5 9in apart Use the guide on page 31 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
36. to the at 10 Mbps 10BASE T The LED will flash to indicate traffic Problem Solving section is passing through that port A l gt fr nr __ Port Status m Duplex _ a gt I w CC u o o C Power CO 4S 6 7 8 qe Bee ree ee 3 C 0 m C i C Green 100M Yellow 10M Flash Activity OfficeConnect Dual Speed Switch 8 Dual Speed Switch 8 Rear gt Power Adapter socket Only use the power adapter that is supplied with this OfficeConnect Switch Do not use any other adapter gt 10 100BASE TX ports Use suitable TP cable with RJ 45 connectors You can connect the OfficeConnect Switch to any workstation or OfficeConnect hub that has a 10BASE T 100BASE TX or 10 100BASE TX port Each port is capable of auto negotiating for 10 Mbps or 100 Mbps operation All ports have an automatic MDI MDIX feature it means either a straight through or crossover UTP cable can be used to connect to any port The switch will automatically detect which wiring practice has been followed and will compensate accordingly 10 30VDC 1A MAX te WARNING RJ 45 ports These are shielded RJ 45 data sockets They cannot be used as standard traditional telephone sockets or to connect the unit to a traditional PBX or public
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