3Com 5017C Switch User Manual
Contents
1. 10BASE 2 50 Ohm cable Minimum length of each cable is 0 5m 1 6ft Maximum segment length is 185m 607ft from terminator to terminator 20 terminator Connecting Hubs Using 10BASE T If you suspect there is a problem refer to Problem Solving You can connect hubs together with 10BASE T in a number for the Hub 8 and 8C on page 22 of ways but for simplicity we recommend the following fe ies Figure 8 C t Hub C ti Using 10BASE T method as shown in Figure 8 GAN N Li dL 1 Starting from the bottom connect the port 8 of the lower hub to port 7 of the hub immediately above Repeat this for each hub 2 Set all Uplink Normal switches to Uplink in except for the top hub the one with port 8 not connected to another hub This unused port can be connected to a workstation provided that the Uplink Normal switch is set to Normal out Checking Connections Switch set to Uplink in TT When you have connected your hubs power them on The Port Status LEDs for the 10BASE T ports you have used should be green If they are not check your connections If the 10BASE 2 port is not used and is not terminated the LED should be yellow showing that it has partitioned This is correct operation Switch set to Uplink in TT Spot Checks At frequent intervals visually check that m The Alert LED is not lit this is the best way to find out with RJ 45 connectors if there are problems with your net2. Packets are the units of information your workstations and other equipment send to each other over the network Collisions are a part of normal Ethernet operation and occur if two or more devices pieces of network equipment attempt to transmit at the same time A sudden sustained increase in the number of collisions can indicate a problem with a device particularly if it is not accompanied by a general increase in traffic On coaxial segments an increase in collisions can also indicate faulty cabling An AUI Attachment Unit Interface port is a standard type of port used to connect 10Mbps Ethernet transceivers to network equipment Hub 8C only DIMENSIONS AND STANDARDS Dimensions and Operating Conditions 0 40 C 32 105 F N 9in operating temperature a 4 35 8mm 1 4in o 0 0 90 6 0 non condensing e humidity 135 4mm 5 3in 15 2mm 0 6in for 10BASE 2 port if applicable Power Weight OfficeConnect Ethernet Hub 4 4 VA 14 BThU hr 500g 1 1 Ib OfficeConnect Ethernet Hub 4C 12 VA 40 BThU hr 550g 1 2 Ib OfficeConnect Ethernet Hub 8 11 VA 38 BThU hr 500g 1 1 Ib OfficeConnect Ethernet Hub 8C 12 VA 40 BThU hr 550g 1 2 Ib 25 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 B VCCI Class Bt CNS 13438 Class A Environmental
3. 16 if you have an m OfficeConnect Ethernet Hub 4 or Hub 4C Read pages 17 23 if you have an m OfficeConnect Ethernet Hub 8 or 8C When you have connected your equipment you are ready to use your network If you suspect there is a problem refer to depending on your hub m Problem Solving for the Hub 4 and 4C on page 15 m Problem Solving for the Hub 8 and 8C on page 22 THE OFFICECONNECT ETHERNET HUB 4 AND 4C Ethernet Hub 4 and 4C Front Alert LED orange Alerts you to excessive network use or an isolated partitioned 10BASE T port Activity LED gt 10BASE T Port Status LEDs Hub 4 only green yellow yellow Indicates the status of each 10BASE T port Flashes each time green The link between the port and the next a packet is piece of network equipment is OK received on a yellow The port has partitioned due to a fault on port that segment off Nothing is connected to the port or the link has failed gt Network Utilization LEDs Hub 4C only green yellow orange Indicates how much your network is being used oo Port Status AUI COAXS Network Utilization CT gt Alert Power Activity Collision 1 2 3 4 ereen AUI Partitioned 1 2 3 6 12 25 50 80 3 Green OK Yellow Partitioned off COAX OfficeConnect Ethernet Hub 4C TO C Power LED uses LED coax Status LEDs Hub 4C only green yellow gree
4. 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 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 36 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
5. 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 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 CONSEQUENTIAL INDIRECT SPECIAL OR PUNITIVE DAMAGES OF ANY KIND OR FOR LOSS OF REVENUE OR PROFITS LOSS OF BUSINESS LOSS OF INFORMATION OR DATA OR OTHER FINANCIAL LOSS ARISING OUT OF OR IN CONNECTION WITH THE SALE INSTALLATION MAINTENANCE USE PERFORMANCE FAILURE OR INTERRUPTION OF ITS PRODUCTS EVEN IF 3COM OR ITS AUTHORIZED RESELLER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES AND LIMITS ITS LIABILITY TO REPAIR REPLACEMENT OR REFUND OF THE PURCHASE PRICE PAID AT 3COM S OPTION THIS DISCLAIMER OF LIABILITY FOR DAMAGES WILL NOT BE AFFECTED IF ANY REMEDY PROVIDED HEREIN SHALL FAIL OF ITS ESSENTIAL PURPOSE 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 limita
6. T 21 Checking Connections 21 Spot Checks 21 Problem Solving for the Hub 8 and 8C 22 Networking Terminology 24 Dimensions and Standards 25 Dimensions and Operating Conditions 25 Standards 25 Environmental Statements 26 End Of Life Statement 26 Regulated Materials Statement 26 Environmental Statement about the Documentation 26 Environmental Statement about the Product Packaging 26 Important Safety Information 27 Wichtige Sicherheitshinweise 28 Consignes importantes de s curit 29 Technical Support 30 Online Technical Services 30 World Wide Web Site 30 3Com Knowledgebase Web Services 30 Support from Your Network Supplier 31 Support from 3Com 31 Returning Products for Repair 34 3Com Corporation Limited Warranty 35 Electromagnetic Compatibility 38 INTRODUCTION Welcome to the world of networking with 3Com In the Figure 1 Small Network With OfficeConnect Hub and Optional modern business environment communication and sharing Print Server information is crucial Computer networks have proved to be one of the fastest modes of communication but until ne recently only large businesses could afford the advantage of OfficeConnect networking The OfficeConnect product range from 3Com print server has changed this bringing networks into the small office A OfficeConnect hub The OfficeConnect Ethernet Hub 4 OfficeConnect Ethernet Hub 4C OfficeConnect Ethernet Hub 8 and OfficeConnect Ethernet Hub 8C are ideal for
7. United States government agency then this 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
8. 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 4mm 1in clearance 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 your hub 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 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 hub and locate it over the screw heads When in line gently push the hub on to the wall and move it downwards to secure When making connections be careful not to push the hub up and off the wall CAUTION Only wall mount single hubs do not wall mount stacked hubs 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 Using Your Hub You are now ready to create your network using your OfficeConnect hub Read pages 10
9. and remove the loop Each piece of equipment needs only one connection to your OfficeConnect hub The LED will change from yellow to green on receiving a valid packet on the port Port Status LED yellow for the 10BASE 2 port when the 10BASE 2 port is not being used The port has partitioned This is correct operation Link between two OfficeConnect hubs not working Check your hub connections follow the information given for your hub With 10BASE T it is likely an Uplink Normal switch is incorrectly set With 10BASE 2 it is likely a terminator end piece is not properly fitted this would cause the 10BASE 2 Port Status LED to light yellow partition Port Status LED not lit for a 10BASE T port that has a connection There is a problem with this connection Check that you are using a straight through 10BASE T cable which is properly connected at both ends and is not damaged If the cable is connected to port 8 ensure that the Uplink Normal switch is set to Normal out Also check that the equipment being connected to the hub is powered on and operating correctly Refer to Figure 9 below to compare the wiring of a straight through and a crossover cable Figure 9 Straight through Cable Crossover Cable Normal a Uplink Normal Normal
10. as shown in Figure 2 m One 10BASE 2 50 Ohm cable for each additional hub The minimum cable length you can use is 0 5m 1 6ft The maximum segment length is 185m 607ft m One 10BASE 2 Y piece for each hub You can use T pieces but Y pieces provide optimal clearance of the other ports m Two 10BASE 2 50 Ohm terminators end pieces Figure 2 Some of the 10BASE 2 Equipment You May Need Terminator end piece 10BASE T If you have additional hubs you want to connect using 10BASE T you need m One straight through TP cable for each extra hub Twisted Pair TP Cables To connect your workstations and hubs you must use straight through TP cable with RJ 45 connectors Cables can be shielded screened or unshielded we recommend that you use shielded The maximum length you can use is 100m 328ft A straight through cable is one where the pins of one connector are connected to the same pins of the other connector 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 securely N CAUTION You can stack up to a maximum of four un
11. port Pin Pin port port Pin Pin port 1 1 1 1 Rx 4 Rx Rxt 4 lt Rx 2 2 2 2 Rx lt Rx Rx 4 Rx 3 3 3 3 Txt gt Tx Txt gt Tx 4 4 4 4 5 5 5 5 6 6 6 6 Tx gt Tx Tx gt Tx 7 7 7 7 8 8 8 8 23 NETWORKING TERMINOLOGY A Network is a collection of workstations for example IBM compatible personal computers and other equipment for example printers connected for the purpose of exchanging information 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 10BASE T is the name given to the Ethernet protocol that runs over Twisted Pair TP cable at 10Mbps The OfficeConnect hub uses RJ 45 type connectors for connecting your TP network 10BASE 2 is the name given to the Ethernet protocol that runs over 50 Ohm Coaxial cable A Network Loop occurs when two pieces of network equipment are connected by more than one path Your hub detects this and partitions isolates one of its ports to break the loop 24 A segment is the length of Ethernet cable connected to a port whether this cable is 1OBASE T 10BASE 2 or other type When you join equipment together with 10BASE 2 cable via single speed hubs the entire cable forms a single segment
12. products visit the 3Com Year 2000 Web page http www 3com com products yr2000 html Environmental Statement Please recycle this user guide after use Please e mail any comments about this document to 3Com at pddtechpubs_comments 3Com com Please include the document title OfficeConnect Ethernet Hub 4 Hub 4C Hub 8 Hub 8C part number DUA1670 0AAA04 and if appropriate the page number Introduction 5 Creating your Network 6 What Else Do Need 6 Workstation Connections 6 Transceiver Connections 6 Hub Connections 7 10BASE 2 7 10BASE T 7 Twisted Pair TP Cables 7 Stacking the Units Together 8 The Rubber Feet 8 The Stacking Clip 8 Positioning Your Hub 9 Securing Your Hub 9 Using Your Hub 9 The OfficeConnect Ethernet Hub 4 and 4C 10 Ethernet Hub 4 and 4C Front 10 Ethernet Hub 4 and 4C Rear 11 Connecting Workstations and Other Eguipment to Your Hub 12 Connecting Transceivers to the AUI Port 12 Connecting OfficeConnect Ethernet Hubs Together 12 Connecting Hubs Using 10BASE 2 13 Checking Connections 13 Connecting Hubs Using 10BASE T 14 Checking Connections 14 Spot Checks 14 Problem Solving for the Hub 4 and 4C 15 The OfficeConnect Ethernet Hub 8 and 8C 17 Ethernet Hub 8 and 8C Front 17 Ethernet Hub 8 and 8C Rear 18 Connecting Workstations and Other Equipment to Your Hub 19 Connecting OfficeConnect Ethernet Hubs Together 19 Connecting Hubs Using 10BASE 2 20 Checking Connections 20 Connecting Hubs Using 10BASE
13. 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 31 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
14. 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 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 t l phone 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 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 30 This service provides access to online support information such as technical documentation and software as well as support options that range from
15. 00 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 Ethernet Hub 4 4C 8 8C The duration of the warranty for the OfficeConnect Ethernet Hub 4 4C 8 8C 3C16704A 3C16703A 3C16700A 3C16701A 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 qualify for the lifetime limited warranty and the advance hardware exchange you must submit the appropriate product warranty registration card to 3Com otherwise this product will be warranted for a period of one 1 year without advance hardware exchange HARDWARE 3Com warrants 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 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 Custome
16. 82 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 Puerto 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 33 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 9
17. 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 Refer to Electromagnetic Compatibility on page 38 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 26 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 fore
18. OfficeConnect A ore Ethernet Hub 4 4C 8 8C User Guide 3C16704A 3C16703A 3C16700A 3C16701A 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 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
19. SE 2 on page 13 11 Uplink Normal switch Affects the operation of port 4 For correct usage refer to Connecting Hubs Using 10BASE T on page 14 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 s curit avant de mettre en route CAUTION Do not power the hub off and on quickly Wait about five seconds between power cycles A Connect workstations and other eguipment to any of the hub s 10BASE T RJ 45 ports using TOBASE T cables 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 gt If you are using port 4 to connect to a workstation using a straight through TP cable ensure the Uplink Normal switch is set to Normal out 12 The hub detects all port connections so you can start using your network immediately When you need more ports simply add more OfficeConnect hubs Connecting Transceivers to the AUI Port You can connect a 10Mbps Ethernet transceiver to your hub Hub 4C only using a standard AUI cable Connect o
20. cables which comply with IEEE 802 3 Wall mounting screw hole guide 150 mm 5 9 in 39 Part No DUA 1670 OAAA04 Published June 1999 40
21. ceConnect hub Do not use any other adapter Uplink Normal switch Affects the operation of port 8 For correct usage refer to Connecting Hubs Using 10BASE T on page 21 18 JAA A a UL 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 s curit avant de mettre en route CAUTION Do not power the hub off and on quickly Wait about five seconds between power cycles A Connect workstations and other eguipment to any of the hub s TOBASE T RJ 45 ports using TOBASE T cables 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 gt If you are using port 8 to connect to a workstation using a straight through TP cable ensure the Uplink Normal switch is set to Normal out 19 The hub detects all port connections so you can start using your network immediately When you need more ports simply add more OfficeConnect hubs Connecting OfficeConnect Ethernet Hubs Together You can increase the number of workstations that ca
22. cks are engaged AUI COAX Port Status LED yellow when the 10BASE 2 port is not being used The port has partitioned This is correct operation Port Status LED not lit for a 10BASE T port that has a connection There is a problem with this connection Check that you are using a straight through 10BASE T cable which is properly connected at both ends and is not damaged If the cable is connected to port 4 ensure that the Uplink Normal switch is set to Normal out Also check that the equipment being connected to the hub is powered on and operating correctly Refer to Figure 6 below to compare the wiring of a straight through and a crossover cable Figure 6 Straight through Cable Crossover Cable Straight through Crossover TxD TxD 1 TxD TxD 2 TxD TxD s e 1 TxD 2 TxD 1 1 2 2 RxD 3 3 RxD RxD 3 3 RxD 6 6 RxD 6 RxD RxD 6 RxD Pins 4 5 7 and 8 are not used Pins 4 5 7 and 8 are not used 16 THE OFFICECONNECT ETHERNET HUB 8 AND 8C Ethernet Hub 8 and 8C Front Alert LED orange Alerts you to excessive network use or an isolated partitioned 10BASE T port Activity LED Hub 8 only yellow Flashes each time a packet is received on a port gt Port Status LEDs green yellow Indicates the status of each port green The link between the port and the next piece of network equipment is OK yellow The port has partitioned due to a fault on that segment off Nothi
23. creating small networks They are compact and attractively designed for desktop use These four products are part of the OfficeConnect range which stack neatly together with the OfficeConnect stacking clip This user guide describes how to use the OfficeConnect hubs The hubs have similar features and so this user guide The OfficeConnect hubs have the following ports contains general and specific information When referring to all products this guide uses the term OfficeConnect hub NE Ma Hub a h s teur TRASEE pong m The Ethernet Hub 4C has four 10BASE T ports a A single OfficeConnect hub allows you to create a small 10BASE 2 port and an AUI port network with up to four or eight workstations as shown in m The Ethernet Hub 8 has eight 10BASE T ports Figure 1 If you need to connect more workstations simply use the stacking clip to connect another OfficeConnect hub m The Ethernet Hub 8C has eight 10BASE T ports and a to form a stack each hub is a single repeater ninth 10BASE 2 port CREATING YOUR NETWORK What Else Do Need 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 and return m Four rubber feet m A stacking clip m Two unit labels and eight cable ties m An OfficeConnect Network Assistant CD ROM To connect workstations and additional OfficeConnect hubs to your hub you need extra equipment The extra equipment li
24. e 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 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 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
25. e 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 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 num rique de la classe B respecte toutes les exigences du Reglement sur le mat riel brouilleur du Canada 38 VCCI STATEMENT CORB WHRUBRESERESAERMBAS VCCI ORE EOS 752 BARRNRE CT CORBI RERHTEATZSIE SANMEL THEI CORBMIVTPT LEV a V REKE UC BASNSe VaMBe eC TCEMHOVET KRABI D CIE U AR D0 AZ U CT V BCIQ STATEMENT Bae GERE TABI TH D RIN gt FY TET E IRIN IR EWT gt ETRE GAR DON PR IM Hi f TAJAN 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
26. hen you have connected your hubs power them on The Port Status LEDs for the 10BASE T ports you have used should be green If they are not check your connections If the 10BASE 2 port is not used and is not terminated and the AUI port is not being used if applicable the LED should be yellow showing that it has partitioned This is correct operation Spot Checks At frequent intervals visually check that m The Alert LED is not lit 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 14 If you suspect there is a problem refer to Problem Solving for the Hub 4 and 4C on page 15 Figure 5 Correct Hub Connections Using 10BASE T Switch set to Normal out Switches set to Uplink in 10BASE T cable with RJ 45 connectors Maximum length of each cable is 100m 328ft PROBLEM SOLVING FOR THE HUB 4 AND 4C 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 equipment is powered on m Power off the hubs wait about 5 seconds and then power on the hubs Check the following symptoms and solu
27. its 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 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 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 a
28. 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 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 32 0800 0227788 800 11376 00800 3111206 0800 831416 0800 995014 900 983125 020 7954
29. lyse 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 Datenbuchsen 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 s curit 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 29 m ll n
30. n connect to your network by adding more OfficeConnect hubs You can use either 10BASE T or 10BASE 2 Hub 8C only to do this Do not connect the same two hubs together using both 10BASE T and 10BASE 2 This causes a network loop If you do not use the 10BASE 2 port you do not need to connect a terminator end piece to it lf a terminator is not used the port partitions and the TOBASE 2 Port Status LED lights yellow This is correct operation Connecting Hubs Using 10BASE 2 Connect a TOBASE 2 Y piece to each of your hubs Hub 8C only Connect the Y pieces with 10BASE 2 cable to form a single segment as shown in Figure 7 Remember to terminate the two free ends of the segment by fitting terminators end pieces To disconnect a 10BASE 2 cable twist each connector counter clockwise to unlock it and remove it When using 10BASE 2 cable it is important that both ends of the segment are properly terminated with 50 Ohm terminators end pieces Only use 50 Ohm 10BASE 2 cables and a Y piece for each hub You can use T pieces but Y pieces provide optimum clearance of the other ports Checking Connections When you have connected your hubs power them on The Port Status LEDs for the 10BASE 2 ports you have used should be off If they are not check your connections Figure 7 Correct Hub Connections Using 10BASE 2 50 Ohm terminator f
31. n 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 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 advanc
32. n off media yellow partition Indicates that the hub is Flashes each time a collision is detected Indicates the status of the AUI or 10BASE 2 port depending on which one is in use powered on on the network Collisions are part of green off The left hand status LED is green if the AUI port is in use and off if either normal network operation the 10BASE 2 port is being used or nothing is connected to the port yellow If the right hand status LED is yellow the port in use has been partitioned 10 Ethernet Hub 4 and 4C Rear gt Power Adapter socket gt AUI port Hub 4C only Only use the power adapter that is supplied with this OfficeConnect hub Do not use any other adapter Allows 10Mbps transceivers of different media types to be connected to the hub Connecting a transceiver automatically disables the 10BASE 2 port gt Four 10BASE T RJ 45 ports Use 10BASE T cable with RJ 45 connectors You can connect the OfficeConnect hub to any workstation or piece of equipment that has a 10BASE T port Refer to Connecting Hubs Using 10BASE T on page 14 DI f ces gt sano IRR zig Normal a HA AUI SUS LSU 10BASE 2 port Hub 4C only Can be used to connect your hub to other OfficeConnect hubs and equipment with 10BASE 2 cabling If used it is effectively a fifth port Refer to Connecting Hubs Using 10BA
33. ne end of the cable to the transceiver and the other end to the AUI port on the hub s rear panel This automatically disables the TOBASE 2 port and activates the AUI COAX LED to show the external transceiver is in use Engage the slide locks at both ends of the AUI cable Connecting OfficeConnect Ethernet Hubs Together You can increase the number of workstations that can connect to your network by adding more OfficeConnect hubs You can use either 10BASE T or 10BASE 2 Hub 4C only to do this Do not connect the same two hubs together using both 10BASE T and 10BASE 2 This causes a network loop If you do not use the 10BASE 2 port you do not need to connect a terminator end piece to it If the AUI port is not used and a terminator is not connected to the 10BASE 2 port the port partitions and the Coax Status LED lights yellow This is correct operation Connecting Hubs Using 10BASE 2 Connect a 10BASE 2 Y piece to each of your hubs Hub 4C only Connect the Y pieces with 10BASE 2 cable to form a single segment as shown in Figure 4 Remember to terminate the two free ends of the segment by fitting terminators end pieces To disconnect a 10BASE 2 cable twist each connector counter clockwise to unlock it and remove it gt If you have connected a 10Mbps Ethernet transceiver to the AUI port the 10BASE 2 port will be disabled You can use this transceiver to connect your hubs but we recommend that you connect yo
34. ng is connected to the port or the link has failed The 10BASE 2 port LED Hub 8C only can only be yellow or off It is yellow if the port has partitioned ei PONT SLAs ae Network Utilization CT D eo L Alert Power Activity Collision 1 2 3 4 5 6 Fi 8 COAX 1 2 3 6 12 25 50 80 3 CT Green OK Yellow Partitioned OfficeConnect Ethernet Hub 8C F Power LED green Indicates that the hub is powered on Collision LED yellow Flashes each time a collision is detected on the network gt Network Utilization LEDs Hub 8C only green yellow orange Indicates how much your network is being used Collisions are part of normal network operation 17 Ethernet Hub 8 and 8C Rear gt 10BASE 2 port Hub 8C only Can be used to connect your hub to other OfficeConnect hubs and equipment with 10BASE 2 cabling If used it is effectively a ninth port Refer to Connecting Hubs Using 10BASE 2 on page 20 gt Eight 10BASE T RJ 45 ports Use 10BASE T cable with RJ 45 connectors You can connect the OfficeConnect hub to any workstation or piece of equipment that has a 10BASE T port Port 8 can be used to link to another OfficeConnect hub Refer to OLI IE Dim Connecting Hubs Using 10BASE T on page 21 wana Power Adapter socket Only use the power adapter that is supplied with this Offi
35. 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 27 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 28 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 Fehlerana
36. r 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 35 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 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 pa
37. rty 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 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 Awww 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 a
38. sted in the next section is not provided with the hub Workstation Connections To connect workstations and other equipment to your hub you need 1 10BASE T connections for all de your equipment 3Com produce VI P GY a range of easy to install D A J 1 network adapter cards which provide your workstations with 10BASE T connections 2 An operating system for example Netware or Windows 95 98 with network support configured running on your workstations 3 One straight through TP cable for every workstation as shown in Figure 2 j 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 isi Transceiver Connections If you want to connect a transceiver to your hub Hub 4C only you need m An AUI cable The maximum length you can use is 50m 164 ft m A 10Mbps Ethernet transceiver for the chosen media type 3Com produce a range of easy to use transceivers Hub Connections Depending on what ports your hub has you can use either 10BASE T or 10BASE 2 to connect your hubs together m With 10BASE 2 you can connect up to 30 hubs on a single segment leaving all of the 10BASE T ports free m With 10BASE T you can connect up to four hubs in series 10BASE 2 To connect additional hubs using 10BASE 2 Hub 4C and 8C only you need
39. sts 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 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 m 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
40. tions 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 hub Alert LED continuously lit There is either continual excessive use of your network over 80 or more likely a 10BASE T port has partitioned due to a loop in your network in which case the corresponding Port Status LED will be yellow Examine your connections and remove the loop Each piece of equipment needs only one connection to your OfficeConnect hub 15 Port Status LED yellow for a 10BASE T port It is likely that there is a loop in your network which has caused this port to partition Examine your connections and remove the loop Each piece of equipment needs only one connection to your OfficeConnect hub The LED will change from yellow to green on receiving a valid packet on the port Link between two OfficeConnect hubs not working Check your hub connections follow the information given for your hub With 10BASE T it is likely an Uplink Normal switch is incorrectly set With 10BASE 2 it is likely a terminator end piece is not properly fitted this would cause the Coax Port Status LED to light yellow partition AUI COAX Port Status LED not lit when external transceiver in use Check the AUI cable is correctly connected to the hub and to the external transceiver Ensure both slide lo
41. tions 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 International Sale of Goods 3Com Corporation 5400 Bayfront Plaza Santa Clara CA 95054 408 326 5000 37 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 th
42. ur hubs using 10BASE T cable refer to the next section When using 10BASE 2 cable it is important that both ends of the segment are properly terminated with 50 Ohm terminators end pieces Only use 50 Ohm 10BASE 2 cables and a Y piece for each hub You can use T pieces but Y pieces provide optimum clearance of the other ports Checking Connections When you have connected your hubs power them on The Port Status LEDs for the 10BASE 2 ports you have used should be off If they are not check your connections 13 Figure 4 Correct Hub Connections Using 10BASE 2 50 Ohm terminator f G 10BASE 2 A cable ___ Minimum length of each cable is 0 5m 1 6ft Y piece T 50 Ohm terminator Maximum segment length is 185m 607ft from terminator to terminator Connecting Hubs Using 10BASE T You can connect hubs together with 10BASE T in a number of ways but for simplicity we recommend the following method as shown in Figure 5 1 Starting from the bottom connect the port 4 of the lower hub to port 3 of the hub immediately above Repeat this for each hub 2 Set all Uplink Normal switches to Uplink in except for the top hub the one with port 4 not connected to another hub This unused port can be connected to a workstation provided that the Uplink Normal switch is set to Normal out Checking Connections W
43. work Maximum length of each cable is 100m 328ft m Case vents are not obstructed m Cabling is secure and not pulled taut 21 PROBLEM SOLVING FOR THE HUB 8 AND 8C 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 equipment is powered on m Power off the hubs wait about 5 seconds and then power on the hubs 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 hub Alert LED continuously lit There is either continual excessive use of your network over 80 or more likely a 10BASE T port has partitioned due to a loop in your network in which case the corresponding Port Status LED will be yellow Examine your connections and remove the 22 loop Each piece of equipment needs only one connection to your OfficeConnect hub Port Status LED yellow for a 10BASE T port It is likely that there is a loop in your network which has caused this port to partition Examine your connections
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