3Com 100 TX Switch User Manual
Contents
1. US Telephone Number 81 3 3345 7251 525 531 0591 06 0227788 800 13376 65 538 9368 27 11 803 7404 900 983125 120 795482 886 2 577 4352 971 4 349049 0800 966197 1 408 492 1790 A product sent directly to 3Com for repair must first be assigned a Return Materials Authorization RMA number A product sent to 3Com without an RMA number will be returned to the sender unopened at the sender s expense To obtain an RMA number call or fax Country U S and Canada Europe Outside Europe U S and Canada Telephone Number 800 876 3266 option 2 31 30 60 29900 option 5 1 408 492 1790 Fax Number 408 764 7120 44 1442 275822 1 408 764 7290 10BASE T 100BASE FX 100BASE T 100 4 100 Backbone CAT 3 CAT 4 CAT5 CDDI GLOSSARY The IEEE 802 3 physical layer specification for a 10 Mbps Ethernet network over two pairs of Category 3 4 or 5 UTP wire The IEEE 802 3 physical layer specification for a 100 Mbps Ethernet network over two strands of fiber The group of IEEE 802 3 physical layer specifications for a 100 Mbps Ethernet network over various wiring specifications The IEEE 802 3 physical layer specification for a 100 Mbps Ethernet network over four pairs of Category 3 4 or 5 UTP wire The IEEE 802 3 physical layer specification for a 100 Mbps Ethernet network over two pairs of Category 5 UTP or STP wire The m2. through the following on line systems 3Com Bulletin Board Service 3ComBBS World Wide Web site 3ComForum on CompuServe 3ComFacts automated fax service 3ComBBS contains patches software and drivers for all 3Com products as well as technical articles This service is available via modem or ISDN seven days a week 24 hours a day Access by Modem To reach the service by modem set your modem to 8 data bits no parity and 1 stop bit Call the telephone number nearest you Country Data Rate Telephone Number Australia up to 14400 bps 61 2 9955 2073 France up to 14400 bps 33 1 69 86 69 54 Germany up to 9600 bps 49 89 627 32 188 or 49 89 627 32 189 Hong Kong up to 14400 bps 852 2537 5608 Italy fee required up to 14400 bps 39 2 273 00680 Japan up to 14400 bps 81 3 3345 7266 Singapore up to 14400 bps 65 534 5693 Taiwan up to 14400 bps 886 2 377 5840 U K up to 28800 bps 44 1442 278278 U S up to 28800 bps 1 408 980 8204 B 2 APPENDIX B TECHNICAL SUPPORT World Wide Web Site 3ComForum on CompuServe Access by ISDN ISDN users can dial in to 3ComBBS using a digital modem for fast access up to 56 Kbps access 3ComBBS using ISDN dial the following number 408 654 2703 Access the latest networking information on 3Com s World Wide Web site by entering our URL into your Internet browser http www 3Com com This service features news and information about 3Com product
3. GOGO aa ARRE OOOOOOOOOO OG OOOOOOOOOO OR OOOO OOOO OOo A OOOO OOOO OOOO OOOO A X CODO OOOO P EXXIEJEJEJEQEZEJEQE2 2E BS Class configuration Figure 3 9 Class Il Hubs LED Descriptions 3 11 LED Descriptions The LinkBuilder FMS 100 TX Hub is equipped with front panel LEDs to provide port status and hub information see Figure 3 10 ACTIVITY LINK PARTITION 12 3 4 Figure 3 10 LED Indicators STATUS FANFALO CLSI O CLSIO COLLISIONO PWR O 56 7 8 9 10 11 12 13 Status LEDs Table 3 2 interprets the meaning of the port STATUS LEDs Table 3 2 Port LEDs LED Color ACTIVITY Green LINK Green PARTITION Amber Status ON OFF ON OFF ON OFF Meaning The port is receiving data The port is not receiving data A connection exists between the port and the end node There is no connection between the port and the end node The port is partitioned because of excessive collisions more than 127 consecutive collisions or because long packets longer than 5 milliseconds are being sent over the network If a port is partitioned it is automatically reconnected to the network when the problem no longer exists
4. The port is not partitioned 3 12 CHAPTER 3 MAKING FMS 100 TX HUB CONNECTIONS Operation LEDs Unit Digital Display Table 3 3 interprets the meaning of the hub operation LEDs Table 3 3 Hub Operation LEDs LED Color Status Meaning FAN FAIL Amber ON One or both of the two internal fans have failed OVERTEMP Amber ON The internal temperature exceeds 158 F 70 C COLLISION Green ON The segment is experiencing collisions CLS II Class 1 OFF The FMS 100 TX Hub does not support Class Il configuration This LED is nonfunctional CLS Class I Green ON The FMS 100 TX Hub supports Class configuration which means that only one repeater or hub stack can be used between two end stations PWR Power Green ON The hub is receiving power The front panel unit digital display see Figure 3 11 provides a numeric designation for each component in a hub stack including a Management Unit if one is present Unit numbers are assigned dynamically as the units are plugged into the stack The Management Unit ID is assigned after the Power On Self Test POST has run The number 1 indicates the device that has no other unit above it in other words the hub or Management Unit that is on the top of the stack and connected by a hub expansion cable to the component immediately below it Figure 3 11 Unit Digital Display Power Up Disabled Option Switch gt Power Up Disabled Option Switch 3 13 If network manageme
5. Y Switch router or bridge 100 meters maximum ji reee Single hub Interconnected hubs Figure 3 6 Connecting Hubs to the Network Backbone Two types of transceiver interface modules are available for connecting the LinkBuilder FMS 100 TX Hub to the LAN By inserting the appropriate transceiver interface module in the hub s thirteenth port you can use either UTP or fiber optic cabling to connect the hub to various LAN devices For example you can connect the LinkBuilder FMS 100 TX Hub to a multiport bridge or switch using the 100 TX module and gain access to a 10BASE T network Likewise by using the 100BASE FX module you can attach the hub to a switch that is connected via fiber cabling to the network See the next section for a discussion of using the hub to access multisegmented networks The required cabling for the two transceiver interface modules is as follows 100BASE TX module Category 5 two pair UTP cabling 100BASE FX module two strand 62 5 125 u multimode fiber cabling Connections to a server or PC from one of the transceiver interface modules require straight through cabling Considerations for Multisegmente Networks d gt Considerations for Multisegmented Networks 3 7 The 100BASE T technology defined in the IEEE 802 3 standard provides for both homogeneous CSMA CD 100 Mbps networks and heterogeneous 10 100 Mbps mixed networks Both network topologies can be support
6. REGULATIONS PROHIBIT THE USE OF STAPLES
7. a spare fuse in the front section of the fuse holder 5 Insert a new fuse rated at 2 A 250 V in the fuse holder 6 Push the fuse holder back into the AC receptacle until it snaps in place and reconnect the AC power cord If the PWR LED remains off contact your network supplier CONNECTIONS MAKING FMS 100 TX This chapter discusses how to use the LinkBuilder FMS 100 TX Hub in various network environments The chapter also discusses how to interpret the hub s LEDs and how to use the power up disabled option Making Network Table 3 1 summarizes the possible schemes for connecting the LinkBuilder Connections FMS 100 TX Hub in a 100BASE T network These connections are the only ones permitted for a Class device such as the LinkBuilder FMS 100 TX Hub Table 3 1 LinkBuilder FMS 100 TX Hub Network Connections Hub Connection Connectors Cabling Required To node RJ 45 port Straight through UTP Transceiver interface module 100BASE TX Straight through UTP 100BASE FX Fiber To another hub in the Expansion connector Expansion cable stack To Management Unit Expansion connector Expansion cable To network backbone Transceiver interface module 100BASE TX Straight through or cross over UTP depending on device 100BASE FX Fiber RJ 45 port Straight through or cross over UTP depending Purpose Connects PCs servers and other network devices directly to the hub Connects as many as eight hubs to each other to form a si
8. products or to replace any defective media with software which substantially conforms to 3Com s applicable published specifications Customer assumes responsibility for the selection of the appropriate applications program and associated reference materials 3Com makes no warranty that its software products will work in combination with any hardware or applications software products provided by third parties that the operation of the software products will be uninterrupted or error free or that all defects in the software products will be corrected For any third party products listed in the 3Com software product documentation or specifications as being compatible 3Com will make reasonable efforts to provide compatibility except where the non compatibility is caused by a bug or defect in the third party s product STANDARD WARRANTY SERVICE Standard warranty service for hardware products may be obtained by delivering the defective product accompanied by a copy of the dated proof of purchase to 3Com s Corporate Service Center or to an Authorized 3Com Service Center during the applicable warranty period Standard warranty service for software products may be obtained by telephoning 3Com s Corporate Service Center or an Authorized 3Com Service Center within the warranty period Products returned to 3Com s Corporate Service Center must be pre authorized by 3Com with a Return Material Authorization RMA number marked on the outside of the package and
9. topology requirements 4 1 specifications 1 1 fax service See 3ComFacts front panel description 1 1 LEDs 1 2 3 11 RJ 45 ports 3 2 unit digital display 3 12 fuse 1 3 2 9 1 replacing 2 9 connections hub to backbone 3 6 hub to Management Unit 3 1 3 5 hub to node 3 2 4 2 hub to hub interconnection 3 4 description 1 1 functions 1 4 installation 2 2 LEDs 3 11 3 12 specifications A 1 installing hub 2 2 desktop placement 2 5 positioning 2 2 rack mounting 2 3 unpacking 2 1 transceiver interface modules 2 6 inter hub bus IHB cable 3 4 L LED descriptions activity 3 11 Class 3 12 Class 3 12 collision 3 12 fan fail 3 12 link 3 11 overtemp 3 12 partition 3 11 power 3 12 LinkBuilder FMS 100 TX Hub See hub M Management Unit connecting to a hub 3 1 3 5 in a hub stack 1 3 maximum UTP cable length hub to node 4 2 multisegmented networks 3 7 N network connections hub to backbone 3 6 hub to hub 3 4 hub to Management Unit 3 1 3 5 hub to node 3 2 via a bridge router or switch 3 6 3 7 4 2 4 3 4 4 network management and power up disabled option 3 13 network supplier support B 3 networks heterogeneous 10 100 Mbps 3 7 on line technical services B 1 Operating voltage requirements A 1 operation LEDs 3 12 P physical dimensions A 1 pin assignments 100BASE TX transceiver interface module 3 3 45 3 3 straight through cabling 3 2 port LEDs 3 11 power requirements A 1 pow
10. wires loosely twisted around each other to help cancel out induced noise in balanced circuits Unshielded twisted pair A cable consisting of two or more pairs of twisted copper wires that are not shielded INDEX Numerics 100 Mbps media options 100BASE FX 1 1 required cabling 3 6 100BASE T4 1 1 100BASE TX 1 1 required cabling 3 6 100BASE FX transceiver interface module 1 2 100BASE T cabling 4 2 topology rules 4 2 100BASE TX transceiver interface module 1 2 3Com Bulletin Board Service 3ComBBS B 1 3Com sales offices B 4 3ComFacts B 3 3ComForum B 2 802 3 specifications 1 1 100 Mbps networks 3 7 repeater functions 1 4 A AC power cord 1 3 2 1 2 8 bulletin board service B 1 C cabling 100BASE FX module 3 6 100BASE TX module 3 6 Category 3 4 or 5 UTP 1 1 fiber 1 1 requirements 100BASE FX module 4 2 100BASE TX module 4 2 hub to workstation 4 2 network connections 3 1 network span 4 3 straight through 3 2 4 1 classification of repeaters Class I 3 9 Class 3 10 collision domain defined 3 7 single repeater 3 9 CompuServe B 2 connecting to the network 3 1 connections hub to backbone 3 6 hub to Management Unit 3 1 3 5 hub to node 3 2 4 2 hub to hub interconnection 3 4 D desktop placement of hub 2 5 digital display 3 12 E environmental operating ranges A 1 Ethernet IEEE 802 3 standard 1 1 3 7 expansion cable 3 4 expansion connectors 1 3 extending the network span 4 4 F Fast Ethernet cabling and
11. with the hub as listed below Inspect each item for damage If you find any omissions or damage contact your network supplier and the carrier that delivered the package Each LinkBuilder FMS 100 TX hub is shipped with the following Rack mounting kit containing two brackets and four screws Four rubber feet for desktop placement power cord 2 2 CHAPTER 2 INSTALLING THE FMS 100 TX Positioning the Hub Installing the Hub If you ordered one or more transceiver interface modules they will be packaged separately from the hub When deciding where to place the hub make sure the environment meets the following conditions The hub is accessible and cables can be connected easily For help in planning your network configuration and the location of the hub refer to Chapters 3 and 4 for information on connecting the hub to the network and the required cabling types and lengths Read this material before locating the hub permanently Cabling is away from Sources of electrical noise such as HVAC radios transmitters and broadband amplifiers a Power lines and fluorescent lighting fixtures Water or moisture cannot enter the hub case Airflow around the unit and through the vents Is not restricted Provide a minimum of 1 inch 2 5 cm clearance on all four sides of the unit No objects are placed directly on top of any stack or unit other than another stackable device This section discusses hub insta
12. LINKBUILDER FMS 100 TX HUB USER GUIDE A member of the 3Com LinkBuilder FMS family Part No 09 0889 000 Published March 1996 3Com Corporation m 5400 Bayfront Plaza m Santa Clara California m 95052 8145 3Com Corporation 1996 All rights reserved No part of this documentation may be reproduced in any form or by any means or used to make any derivative work such as translation transformation or adaptation without permission from 3Com Corporation 3Com Corporation reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of 3Com Corporation to provide notification of such revision or change 3Com Corporation provides this documentation without warranty of any kind either implied or expressed including but not limited to the implied warranties of merchantability and fitness for a particular purpose 3Com may make improvements or changes in the product s and or the program s described in this documentation at any time UNITED STATES GOVERNMENT LEGENDS If you are a United States government agency then this documentation and the software described herein are provided to you subject to the following restricted rights For units of the Department of Defense Restricted Rights Legend Use duplication or disclosure by the Government is subject to restrictions as set forth in subparagraph c 1 ii for restricted Rights in Technical Data and Computer So
13. ONNECTION 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 Some states do not allow the exclusion of implied warranties or the limitation of incidental or consequential damages for consumer products so the above limitations and exclusions may not apply to you This warranty gives you specific legal rights which may vary from state to state GOVERNING LAW This Limited Warranty shall be governed by the laws of the state of California FCC CLASS A VERIFICATION STATEMENT WARNING This equipment has been tested and found to comply with the limits for a Class A 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 commercial 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 Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at the user s own expense Changes or modifications not expressly approved by 3Com could void the user s authority to operate this e
14. Your Network Supplier B 3 Support from 3Com 4 Returning Products for Repair B 4 GLOSSARY INDEX LIMITED WARRANTY FCC CLAss A VERIFICATION STATEMENT CISPR A COMPLIANCE CE NOTICE vi 1 1 1 2 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 3 1 3 2 3 3 3 4 3 5 3 6 3 7 3 8 3 9 3 10 3 11 3 12 4 1 4 2 4 3 FIGURES Front Panel of LinkBuilder FMS 100 TX Hub 1 2 Rear Panel of LinkBuilder FMS 100 TX Hub 1 2 Attaching a Bracket for Rack Mounting 2 3 Rack Mounting a Single Hub 2 3 Installing a Hub Stack in a Rack 2 4 Attaching a Bracket for Desktop Placement 2 5 Transceiver Interface Modules 2 6 Connecting the Redundant Power System to Four Hubs 2 8 Opening the Fuse holder in the AC Receptacle Assembly 2 9 Removing the Fuse 2 10 LinkBuilder FMS 100 TX Hub Supporting 11 Users and a Server 3 2 Pin Assignments for Straight Through Cabling 3 3 R 45 Connector Pin Assignments 3 3 Interconnecting Two Hubs 3 4 Connecting a Hub Stack to a Management Unit 3 5 Connecting Hubs to the Network Backbone 3 6 10 and 100 Mbps Collision Domains Connected by a Switching Hub 3 8 Class Hub 3 9 Class ll Hubs 3 10 LED Indicators 3 11 Unit Digital Display 3 12 Power Up Disabled Option Switch 3 13 Connecting the Hub to aWorkstation 4 2 Connecting the Hub in a Network Span of 260 8 Meters 4 3 Using an Internetworking Device to Extend the Network Span 4 4 vil viii 1 1 2 1 3 1 3 2 3 3 3 4 4 1 TABLES Supporte
15. able ports if you want them to receive data CABLING The LinkBuilder FMS 100 TX Hub supports Fast Ethemet cabling and topology requirements as detailed in the IEEE 802 3 specification Fast Ethernet preserves the 100 meter maximum UTP cable length from the hub to the desktop that is a requirement for 10 Mbps Ethernet Two 100 Mbps topology rules are different from those for 10 Mbps Ethemet The maximum number of repeaters in a collision domain is two For additional information refer to the sections Considerations for Multisegmented Networks and Classification of Repeaters in Chapter 3 The LinkBuilder FMS 100 TX Hub only supports one repeater in a collision domain In a single collision domain the maximum network diameter is 200 meters with Category 5 UTP cabling only or 260 8 meters with one fiber optic cabling link Refer to Table 4 1 for a summary of maximum cable lengths Table 4 1 Maximum Network Collision Domain Diameters Model Maximum Cable Length Media Hub to connected 100 meters Straight through UTP cable workstations One Class repeater 200 meters Straight through UTP cable 260 8 meters Combined UTP and fiber cable 4 2 CHAPTER 4 CABLING Transceiver The two transceiver interface modules provide downlink connectivity to Interface Module another hub or to a bridge router or switch For transceiver interface Cabling module connections the hub supports 100BASE T functionality using the Requiremen
16. ach brackets to both sides of the other hubs to be rack mounted as described in steps 2 through 4 7 Insert each hub into the rack and fasten each one individually to the rack uprights as shown in Figure 2 3 NN N 44 88 4 Figure 2 3 Installing a Hub Stack in a Rack 8 Repeat steps 2 through 7 when placing additional hubs in the stack gt A single hub stack can contain up to eight units eight hubs or seven hubs and one Management Unit and two Redundant Power Systems 9 For each hub plug one end of the power cord into the AC power connector and the other end into a power source Refer to the section Using the Redundant Power System for information on installing the Redundant Power System All the LEDs should light momentarily Verify that the PWR power LED remains ON indicating that the hub Is receiving power See Chapter 3 for information about connecting the stack to the network and interpreting LEDs Desktop Placement Installing the Transceiver Interface Modules Installing the Transceiver Interface Modules 2 5 If you place the hub on a desk or table attach the supplied rubber feet to each bottom corner of the hub If you stack additional hubs on top of the bottom one place rubber feet on the bottom of each corner of each hub in the outline shown on the unit s base To prevent hubs from possibly sliding off the stack fasten each hub to the hub below it by using the supplied brac
17. ain transmission medium used to interconnect the workgroup areas of a network Fiber optic cable is often used for the backbone connection Category 3 balanced cable Balanced 100 Q and 120 cables and associated connecting hardware whose transmission characteristics are specified up to 16 MHz Used by 10BASE T and 100BASE T4 installations Category 4 balanced cable Balanced 100 Q and 120 Q cables and associated connecting hardware whose transmission characteristics are specified up to 20 MHz Used by 10BASE T and 100BASE T4 installations Category 5 balanced cable Balanced 100 Q and 120 cables and associated connecting hardware whose transmission characteristics are specified up to 100 MHz Used by10BASE T and 100BASE T installations Copper Distributed Data Interface FDDI over twisted pair copper wire See also FDDI 2 GLOSSARY Class Class Il Collision Collision domain Ethernet Fast Ethernet FDDI Fiber optic cable FMS A type of 100BASE T repeater with internal delay such that only one repeater or stack may exist between any two end stations within a single collision domain when two maximum length copper cable segments are used A type of 100BASE T repeater with internal delay such that two repeaters or stacks may exist between any two end stations within a single collision domain when two maximum length copper cable segments are used A condition that results from concurrent transmissions from multiple s
18. an two logical Class Il repeaters or one logical Class repeater before reaching its destination or passing through a LAN bridge switch or router Classification of Repeaters Class Repeaters gt Classification of Repeaters 3 9 The IEEE 802 3 standard defines two classes of repeaters for 100BASE T Fast Ethernet networks as detailed below A Class repeater is a hub with internal delay such that only one repeater can exist between any two DTE data terminal equipment devices within a single collision domain when two maximum length cable segments are used The LinkBuilder FMS 100 TX Hub product number 3C250 TX 1 is a Class device only Internal delay is the time delay between the sensing of the first data bit received and the sensing of the first bit transmitted on a 100 Mbps CSMA CD network Propagation time delays also affect repeater classification Class repeater delays are longer than Class repeater delays A Class network topology consists of one hub or hub stack in a single collision domain existing between any two end stations The stack of LinkBuilder FMS 100 TX Hubs in this configuration can contain up to eight hubs Figure 3 8 shows a single collision domain containing one Class hub stack between two end stations with the distance between end stations being 200 meters If one of the hub to node segments Is implemented with fiber cabling by using the 100BASE FX transceiver interface module the t
19. ble and insert one end into the RPS and the other into the DC input connector on each hub If you do not use the RPS you must connect each hub separately to an AC power source Replacing the Fuse 2 9 Replacing the Fuse If the hub power PWR LED was lit initially but is no longer lit one of the following conditions may have caused the LED to go out m The unit may be disconnected from its AC power source lf connected to an RPS the unit may be disconnected from its DC power source Verify that the RPS is on and securely attached to the hub m The power source may have failed If you are using AC power verify that the AC power cord Is securely attached If the LED is still not lit the fuse probably needs to be replaced The fuse is located in the hub s AC receptacle assembly on the hub s rear panel and is supplied as standard equipment for the hub It is a fast blow FSF034 1523 fuse or equivalent rated at 2 A 250 V To replace the fuse follow these steps 1 Locate the AC receptacle on the hub s rear panel 2 Disconnect the AC power cord 3 Using a small screwdriver carefully pry open and pull out the fuse holder as shown in Figure 2 7 Figure 2 7 Opening the Fuse holder in the AC Receptacle Assembly 2 10 CHAPTER 2 INSTALLING THE FMS 100 TX HuB 4 Remove the burned out fuse by pulling it straight out of its socket as shown in Figure 2 8 Figure 2 8 Removing the Fuse If you wish you can store
20. connection That is no crossovers should be present The pin assignments for a straight through cable are shown in Figure 3 2 Refer to Chapter 4 for cabling details Making Network Connections 3 3 Adapter Hub NO NO ro 8 8 Figure 3 2 Pin Assignments for Straight Through Cabling The pin assignments for the 100BASE TX transceiver interface module are the same as the pin assignments for the RJ 45 ports on the hubs front panel Figure 3 3 shows the RJ 45 connector pin assignments LinkBuilder FMS 100 100BASE TX Hub RD RD TD TD 12345678 Figure 3 3 RJ 45 Connector Pin Assignments 3 4 CHAPTER 3 MAKING FMS 100 TX HUB CONNECTIONS Hub to Hub You can interconnect up to eight hubs using expansion cables to form one Interconnection logical unit The hub expansion cable is also designated the inter hub bus IHB cable Interconnecting eight hubs will provide a maximum of 104 ports 96 RJ 45 ports from the front panels and 8 ports from the transceiver interface modules inserted in the hubs rear panels gt You do not have to turn off the power if you are connecting hubs using expansion cables Use the hub expansion cable 3C219 to connect the UP expansion port on the rear panel of one hub to the DOWN expansion port on the next hub as shown in Figure 3 4 The hub expansion cable must be purchased separately Repeat this step for each hub in the stack DOWN expan
21. d IEEE 802 3 Repeater Functions 1 4 Transceiver Interface Modules 2 5 LinkBuilder FMS 100 TX Hub Network Connections 3 1 Port LEDs 3 11 Hub Operation LEDs 3 12 Settings on Power Up Disabled Option Switch 3 13 Maximum Network Collision Domain Diameters 4 1 Introduction How to Use This Guide ABOUT THIS GUIDE This guide describes how to mount the 3Com LinkBuilder FMS 100 TX Hub in a rack install the hub on the network and interpret the hub front panel LEDs It also describes in general terms the functioning of the hub in a Fast Ethernet network environment The following table shows where to find specific information in this guide If you are looking for Turn to General information about the hub Chapterl Instructions for mounting the hub Chapter 2 Instructions for connecting the hub to the network Chapter 3 Information about interpreting LEDs Chapter 3 Information about the hub s transceiver interface modules Chapter 3 Information about cabling requirements Chapter 4 Information on hub specifications Appendix A Information about 3Com s technical support services Appendix B 2 ABOUT THIS GUIDE Conventions The following table lists the notice icons that are used throughout this guide Icon Type Description gt Information Note Caution Warning Information notes call attention to important features or instructions Cautions alert you to personal safety risk system damage or los
22. e follow these steps Disconnect the AC power cord from the individual hub into which you are installing the transceiver interface module You do not have to power down the entire stack to install a module in a single hub If you are installing several modules power down each hub before inserting its module Remove the blanking plate from the transceiver interface module port on the hubs rear panel by unscrewing the plate s two end screws The transceiver interface module port is shown in Figure 1 2 Keep the blanking plate for possible future use in case you remove the module Using the Redundant Power System Using the Redundant Power System 2 7 3 Carefully remove the transceiver interface module from its shipping container 4 Slowly insert the module into the slot being careful not to damage any of the components or connecting pins The module will slide into the hub following the tracks in the slot The lettering that shows the module type must be positioned on top of the connector openings when the module is in place 5 Push the module all the way in until the connector is firmly seated 6 Tighten the two thumbscrews to secure the module in place 7 Reattach the power cord to the hub 8 Attach the proper cable to the module to make the desired network connection The ACTIVITY LED for the thirteenth port on the front panel should be green indicating the module is correctly installed To ensure fail safe op
23. ed by connecting various LAN segments using repeaters and switches bridges or routers The LinkBuilder FMS 100 TX Hub supports only the 100 Mbps network topology Access to 10 Mbps functionality is possible through connections with switches bridges or routers that support 10 100 Mbps topologies Two LAN segments connected by a repeater constitute a single collision domain LAN segments connected by switches bridges or routers constitute multiple collision domains You can achieve maximum network flexibility by designing multiple collision domain networks For example a combined system containing both 10BASE T and 100BASE T devices and built with repeaters and switches can deliver dedicated 100 Mbps shared 100 Mbps dedicated 10 Mbps and shared 10 Mbps services to devices on the LAN Figure 3 7 illustrates a network composed of two collision domains connected by a 10 100 Mbps switching hub CHAPTER 3 MAKING FMS 100 TX HUB CONNECTIONS ea LinkBuilder FMS 00000000 6789101 SDN 100 TX Hub LinkSwitch 1000 Switch BR yt LinkBuilder FMS II 10 Mbps Hub Figure 3 7 10 and 100 Mbps Collision Domains Connected by a Switching Hub gt A Fast Ethernet packet transmitted on a LAN can pass through no more th
24. er up disabled option switch 3 13 R rack mounting instructions for 2 3 kit 2 1 rear panel connectors 1 3 description 1 2 power up disabled option switch 3 13 thirteenth port 1 1 Redundant Power System RPS 1 3 function of 2 7 installation 2 7 repeater s classification of 3 9 functions 1 4 LinkBuilder FMS 100 TX Hub 1 1 maximum number allowed 4 1 replacing the fuse 2 9 returning products for repair B 4 RJ 45 connector pin assignments 3 3 RJ 45 ports 1 1 3 2 INDEX 3 S specifications environmental operating ranges A 1 physical dimensions A 1 power requirements A 1 stacking hubs 1 3 straight through cabling pin assignments 3 3 SuperStack family FMS 100 Management Unit 1 3 FMS 100 TX Hub 1 3 T technical support B 1 thirteenth port transceiver interface module port 1 1 topology rules 100 4 1 4 2 transceiver interface module port 1 1 transceiver interface modules 1 1 3 6 100BASE FX 1 2 100BASE TX 1 2 cabling 2 5 cabling requirements 4 2 connectortypes 2 5 installation 2 6 U unit digital display 3 12 LIMITED WARRANTY HARDWARE 3Com warrants its hardware products to be free from defects in workmanship and materials under normal use and service for the following lengths of time from the date of purchase from 3Com or its Authorized Reseller Internetworking products One year Network adapters Lifetime Ethernet stackable hubs and Unmanaged Ethernet fixed port repeaters Lifetime One year i
25. eration and constant power to the hub stack you can use the 3Com Redundant Power System RPS part number 3C565047 The RPS must be purchased separately The RPS which is rack mountable comprises two load sharing bulk power supplies fed by two independent AC lines Either power supply alone can support a stack of up to four hubs Eight hubs in a stack will require two RPS units one mounted on the bottom of the stack and the other on the top Redundant fans protect against possible failures caused by overheating The RPS front panel provides LED indicators for monitoring temperature as well as input and output status In the event of a failure in one of the supplies an alert is automatically sent to the management console 2 8 CHAPTER 2 INSTALLING THE FMS 100 TX The RPS cables are inserted into the DC input connectors on the hubs rear panels Remove the rubber protective cover from each DC input connector before connecting the RPS cable Figure 2 6 shows the RPS mounted on top of a four hub stack and connected to each hub Redundant Power System DC input connector Com o o U Sans Cora Cra DC iy RPS cables Figure 2 6 Connecting the Redundant Power System to Four Hubs CAUTION If you use the Redundant Power System do not use the AC power plug on the rear panel or the AC power cable that is supplied with each hub Instead use the RPS ca
26. etwork management station and the agent residing in network elements The protocol does not define the objects that can be managed The MIB defines manageable objects SNMP can be used with any network management variable that can be inspected and altered A 0 4 inch diameter cable comprised of two foil shields and two braids over copper wire It requires an external transceiver cable or N series to BNC series adapter It is also called thick Ethernet cable See also thin Ethernet cable Shielded twisted pair Shielded four conductor electrical cable that offers high speed transmission for long distances 4 GLOSSARY SuperStack Thin Ethernet cable Transceiver Twisted pair UTP 3Com system of stackable hubs servers switches routers SDLC converters and power supplies SuperStack systems can support a range of LAN environments including Ethernet token ring FDDI SNA and ATM A cable standard for Ethernet IEEE 802 3 networks using RG 58 A U or RG 58 C U cable and BNC connectors The coaxial cable is 0 2 inches in diameter so it is more flexible than thick Ethernet cable Thin Ethernet Operates at the same frequency as thick Ethernet but over a shorter distance and it provides less insulation from interference than thick Ethernet A hardware device that links a node to a network cable and functions as both a transmitter and a receiver Wiring similar to that found in the telephone system consisting of two insulated
27. evice used to provide connectivity between network devices Hubs perform the basic repeater functions of restorating signal amplitude and timing detecting collisions and broadcasting signals to lower level hubs and network devices Media Access Control The data link sublayer that is responsible for transferring data to and from the physical layer Management Information Base A logical naming of all information resources residing in a network and pertinent to the network s management Simple Network Management Protocol SNMP management uses a set of standard MIBs known as MIB ll and other standard MIBs for FDDI Ethernet etc In addition vendors write proprietary MIB extensions for SNMP management of particular devices A repeater function that isolates a particular port from the network because of an excessive number of collisions Once the problem causing the collisions is corrected the port is reactivated A device that extends the length topology or interconnectivity of the physical medium beyond that imposed by a single segment up to the maximum allowable end to end trunk transmission line length Repeaters perform the basic actions of restoring signal amplitude waveform and timing applied to normal data and collision signals See also Hub Simple Network Management Protocol A network monitoring protocol for TCP IP based networks It is a simple request response protocol used to communicate management information between the n
28. f not registered Fast Ethernet stackable hubs One year Power supply and fans in these stackable hubs and unmanaged repeaters One year Other hardware products One year Spare parts and spares kits 90 days If a product does not operate as warranted during the applicable warranty period 3Com shall at its option and expense repair the defective product or part deliver to Customer an equivalent product or part to replace the defective item or refund to Customer the purchase price paid for the defective product All products that are replaced will become the property of 3Com Replacement products may be new or reconditioned Any replaced or repaired product or part has a ninety 90 day warranty or the remainder of the initial warranty period whichever is longer 3Com shall not be responsible for any software firmware information or memory data of Customer contained in stored on or integrated with any products returned to 3Com pursuant to any warranty SOFTWARE 3Com warrants that the software programs licensed from it will perform in substantial conformance to the program specifications therefor for a period of ninety 90 days from the date of purchase from 3Com or its Authorized Reseller 3Com warrants the magnetic media containing software against failure during the warranty period No updates are provided 3Com s sole obligation hereunder shall be at 3Com s discretion to refund the purchase price paid by Customer for any defective software
29. ftware clause at 48 C F R 52 227 7013 3Com Corporation 5400 Bayfront Plaza Santa Clara California 95052 8145 For civilian agencies Restricted Rights Legend Use reproduction or disclosure is subject to restrictions set forth in subparagraph a through d of the Commercial Computer Software Restricted Rights Clause at 48 C F R 52 227 19 and the limitations set forth in 3Com Corporation s standard commercial agreement for the software Unpublished rights reserved under the copyright laws of the United States If there is any software on removable media described in this documentation it is furnished under a license agreement included with the product as a separate document in the hard copy documentation or on the removable media in a directory file named LICENSE TXT If you are unable to locate a copy please contact 3Com and a copy will be provided to you Unless otherwise indicated 3Com registered trademarks are registered in the United States and may or may not be registered in other countries 3Com LinkBuilder and EtherLink are registered trademarks of 3Com Corporation 3TECH FMS and SuperStack are trademarks of 3Com Corporation 3ComFacts is a service mark of 3Com Corporation CompuServe is a trademark of CompuServe Incorporated Other brand and product names may be registered trademarks or trademarks of their respective holders 3Com registered trademarks are registered in the United States and may or may not be registered in
30. kets as shown in Figure 2 4 em c z 3 30250 FAN FAIL TX I OVERT Ey ENT m EMS 100 ds SE SION y 3C250 i RE CM u Econ cS tous veg u Rz G ISioN Hub Q Y ag Figure 2 4 Attaching a Bracket for Desktop Placement The LinkBuilder FMS 100 TX Hub chassis is equipped with a rear panel port into which you can insert an optional 3Com transceiver interface module The transceiver interface module permits connections to a 100 Mbps Ethernet station or a network backbone that Is also running 100 Mbps Ethernet The two types of transceiver interface modules are shown in Figure 2 5 Table 2 1 describes the two 100 Mbps modules Table 2 1 Transceiver Interface Modules Module Type 3Com Part Number Connector Cabling 100BASE TX 3C252 TX RJ 45 Category 5 UTP cabling 100BASE FX 3C262 FX Multimode fiber Two strand 62 5 125u SC connector fiber optic cabling 2 6 CHAPTER 2 INSTALLING THE FMS 100 TX CAUTION Each module 15 packed in antistatic material to protect it during shipment To avoid damaging any static sensitive components after removal from the container be sure to reduce any static electricity on your person One way to do this is to touch the metal chassis of the hub You can maintain grounding by wearing a wrist strap attached to the chassis 100BASE FX Figure 2 5 Transceiver Interface Modules To install a transceiver interface modul
31. llation You can install the hub in a standard 19 inch rack or on a desk or table WARNING 3Com strongly recommends that you install the hub stack in a rack particularly if you intend to use more than four hubs in the stack Since each hub weighs 12 pounds 5 5 kg the total weight of eight hubs the maximum hub stack plus the possible addition of two RPSs would be more than 100 pounds 45 5 kg For maximum safety this combination of units should be installed in the lower part of a rack If placed on a desk or table be certain that the furniture Is sturdy enough to support the weight Installing the Hub 2 3 Rack Mounting The hub is supplied with two brackets and four screws for rack mounting in a standard 19 inch rack The four rubber feet that are shipped with each hub are not used for rack mounting To mount the hub in a rack follow these steps which assume you are stacking two or more hubs in a rack 1 Place one of the hubs on a level surface with the front panel facing you 2 Position a bracket over the mounting holes on one side of the unit as shown in Figure 2 1 Figure 2 1 Attaching a Bracket for Rack Mounting 3 Insert the two screws and tighten with a screwdriver 4 Repeat steps 2 and 3 for the other side of the hub 5 Mount the hub in the rack and secure it with suitable screws as shown in Figure 2 2 Figure 2 2 Rack Mounting a Single Hub 2 4 CHAPTER 2 INSTALLING THE FMS 100 TX 6 Att
32. ngle logical stack Connects hub or hub stack to a Management Unit Connects hub or hub stack to network backbone through a bridge router or switch on device Connections that use the 100BASE TX module are identical to those that use an RJ 45 port on the hubs front panel 3 2 CHAPTER 3 MAKING FMS 100 HUB CONNECTIONS Hub to Node Once installed the hub can support up to 12 end node connections Figure 3 1 shows 11 PCs and one server connected to the RJ 45 ports on the hub s front panel You can connect any combination of PCs servers and other hubs to the 12 RJ 45 ports The thirteenth port permits an additional connection through the transceiver interface module located on the hub s rear panel See the section Installing the Transceiver Interface Modules in Chapter 2 100 meters maximum A LinkBuilder FMS 100 Hub E gt 2 gt Twisted pair cable je ee Server Figure 3 1 LinkBuilder FMS 100 TX Hub Supporting 11 Users and a Server The maximum allowable distance between the hub and a PC server or other device is 100 meters of Category 5 UTP cable The UTP cable used for hub to node connections is a straight through
33. nt is present an external switch on the hub s rear panel allows you to power up the hub with the ports disabled The power up disabled option switch is located between the expansion connectors and the DC input connector as shown in Figure 3 12 This feature cannot be fully implemented unless a network management device such as the LinkBuilder FMS 100 Management Unit is connected to the hub stack If no network management is present leave the power up disabled option switch in the enabled position set to E Power up disabled option switch Figure 3 12 Power Up Disabled Option Switch Table 3 4 describes the functioning of the power up disabled option switch Table 3 4 Settings on Power Up Disabled Option Switch Setting Result D disabled If network management is present you can enable specific ports after the hub has been powered up If network management is not present all ports remain disabled after the hub has been powered up E enabled This is the default setting All ports are enabled after the hub has been powered up whether or not network management is present If network management is present individual ports can then be disabled after the hub has been powered up You can use this option for security purposes For example you can disable a port where a faulty device or other problem exists This prevents the disabled port from receiving any data when the hub is powered up Conversely you can en
34. otal span can be 260 8 meters That is up to 100 meters can consist of UTP cabling with up to 160 8 meters of fiber cabling 200 meters maximum UTP distance 260 8 meters mixed UTP and fiber cable 100 meters maximum 160 8 meters fiber cable 100 meters maximum GOO 1 raa EEE 1 racio caa LIED CACICACICICICACICICICALI Class configuration Figure 3 8 Class Hub 3 10 CHAPTER 3 MAKING FMS 100 TX HUB CONNECTIONS Class Il Repeaters Class Il repeater is a hub with internal delay such that no more than two hubs can exist between any two DTE devices within a single collision domain when two maximum length cable segments are used The Class Il network topology allows two hubs or hub stacks to exist between any two end stations Figure 3 9 shows a two repeater collision domain containing two hubs between two end stations that are located 205 meters apart This is the total allowable span for UTP cable aL 205 meters maximum UTP distance 100 meters maximum 5 meters maximum 100 meters maximum CACC CI CICICICICICILI CCCI CICICICICICICILI
35. other countries Guide written by John eter Edited by Nancy Kurahashi Technical illustration by Tim Buckreus Production by Becky Whitmer CONTENTS ABOUT THIS GUIDE Introduction 1 How to Use This Guide 1 Conventions 2 INTRODUCTION General Description 1 1 Management Unit 1 3 Hub Functions 1 4 INSTALLING THE FMS 100 TX HUB Unpacking the Hub 2 1 Positioning the Hub 2 2 Installing the Hub 2 2 Rack Mounting 2 3 Desktop Placement 2 5 Installing the Transceiver Interface Modules 2 5 Using the Redundant Power System 2 7 Replacing the Fuse 2 9 MAKING FMS 100 TX HUB CONNECTIONS Making Network Connections 3 1 to Node 3 2 Hub to Hub Interconnection 3 4 Hub to Management Unit 3 5 Hub to Backbone 3 6 Using Transceiver Interface Modules 3 6 Considerations for Multisegmented Networks 3 7 Classification of Repeaters 3 9 Class Repeaters 3 9 Class Repeaters 3 10 LED Descriptions 3 11 Status LEDs 3 11 Operation LEDs 3 12 Unit Digital Display 3 12 Power Up Disabled Option Switch 3 13 CABLING Transceiver Interface Module Cabling Requirements 4 2 Topology Rules 4 2 Hub to Connected Workstations 4 2 One Class Repeater 4 3 SPECIFICATIONS Hub Specifications 1 TECHNICAL SUPPORT On line Technical Services B 1 3Com Bulletin Board Service 1 Access by Modem B 1 Access ISDN B 2 World Wide Web Site 2 3ComForum on CompuServe B 2 3ComFacts Automated Fax Service B 3 Support from
36. ources within a single collision domain A single CSMA CD network If two or more Media Access Control MAC sublayers are within the same collision domain and both transmit at the same time a collision will occur MAC sublayers separated by a repeater are in the same collision domain MAC sublayers separated by a bridge router or switch are within different collision domains A local area network standard defining a physical medium and its method of placing data or packet signaling on a cable Access to the cable is based on CSMA CD carrier sense multiple access with collision detection A 100 Mbps technology based on the Ethernet CSMA CD network access method Fiber Distributed Data Interface The local area networking standard that provides high bandwidth for interconnecting computers and peripheral devices using a fiber optic medium in a ring configuration The FDDI specification is made up of standards that correspond to the IEEE OSI model layers on the physical and data link levels These standards specify the physical interfaces functions and operations needed to support interoperability between devices Cable consisting of a glass center cladding a buffer layer strength members and a cable sheath The glass center supports the transmission of light signals Flexible Media Stack 3Coms family of stackable hubs Hub MAC MIB Partition Repeater SNMP Standard Ethernet cable STP GLOSSARY 3 A d
37. ovide activity link and partition status information Additional LEDs provide repeater classification environmental and port status information Refer to Chapter 3 for the interpretation of LEDs The hubs rear panel Figure 1 2 has a slot for a 3Com transceiver interface module which as the thirteenth port provides media flexibility and accessibility to the hub This slot can also be left empty if desired with no connection no module attached Two types of transceiver interface modules are available and must be purchased separately m 100 Category 5 UTP module 3C252 TX m lOOBASE FX Fiber module 3C262 FX Additional modules may be supported in the future EXPANSION UP SCHEN 3Com Corporation Santa Clara CA 3 Made in USA fuse 2 INPUT E 1 ma 625 02 50 25 02 a D E DOWN ele power cord socket DC input Power up Expansion Transceiver connector disabled connectors interface Figure 1 2 Rear Panel of LinkBuilder FMS 100 TX Hub DC INPUT O Management Unit Management Unit 1 3 The two expansion connectors used for adding components additional hubs or aManagement Unit to create a hub stack The LinkBuilder FMS 100 TX Hub can be used as a stand alone repeater or as a stacked unit with other LinkBuilder FMS 100 Hubs Stacking units pr
38. ovides the benefit of a higher port count with the stack functioning as a single logical repeater Up to eight units for example seven hubs and a Management Unit can be connected together in a stack The rear panel of the hub provides a three pronged socket for attaching a 100 240 V AC power cord to the hub Alternatively power can be supplied through a 3Com Redundant Power System RPS connected to the DC input connector Refer to the section Using the Redundant Power System in Chapter 2 for additional information A 2 A 250 V fast blow fuse is located in the 5 AC receptacle You can mount the LinkBuilder FMS 100 TX Hub in a 19 inch standard rack or you can place it as a stand alone unit on a desk or table A rack mounting kit is supplied with each hub The LinkBuilder FMS 100 TX Hub can support aManagement Unit to provide full SNMP manageability to a hub stack The Management Unit is designed for inclusion in 3Com s SuperStack family of stackable network devices and can also be connected to the Redundant Power System RPS If a Management Unit is included in a stack maximum of seven hubs 15 allowed in the stack that is one Management Unit plus seven repeaters for a total of eight components the maximum number of components allowed in one hub stack gt Only one Management Unit can be attached to each stack 1 4 CHAPTER 1 INTRODUCTION Hub Functions The LinkBuilder FMS 100 TX Hub supports the standard function
39. ppliers 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 Diagnostic error messages A list of system hardware and software including revision levels 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 B 4 APPENDIX B TECHNICAL SUPPORT Support from 3Com Returning Products for Repair If you are unable to receive support from your network supplier technical support contracts are available from 3Com In the U S and Canada call 800 876 3266 for customer service If you are outside the U S and Canada contact your local 3Com sales office to find your authorized service provider Country Australia Sydney Melbourne Belgium Brazil Canada Denmark Finland France Germany Hong Kong Ireland Italy Telephone Number 61 2 959 3020 61 3 653 9515 0800 71429 55 11 546 0869 905 882 9964 800 17309 0800 113153 05 917959 0130 821502 852 868 9111 1 800 553117 1678 79489 These numbers are toll free Country Japan Mexico Netherlands Norway Singapore South Africa Spain Sweden Taiwan United Arab Emirates
40. process measurement and control equipment Part 4 Electrical fast transient burst requirements Severity level 2 A Declaration of Conformity in accordance with the above standards has been made and is on file at 3Com Corporation NOTES NOTES NOTES NOTES PLEASE CUT HERE pa N Reader Comment Form 3Com Corporation Your comments concerning 3Com publications are important to us Please take the time to complete this form Your suggestions and comments will help us improve our future publications Thank you Publication Title LinkBuilder FMS 100 TX Hub User Guide Please rate the quality of this publication in each of the following areas Excellent Good Fair Poor Technical Accuracy Does the product work as the manual says it does Illustrations Are they clear and useful Are there enough of them Organization Is it easy to locate information Completeness Did you find all the information you needed Examples Are they helpful Are there enough of them How did you use this publication Check all that apply Installation manual Introduction to the subject Reference training Other Optional Name Company Address NO POSTAGE NECESSARY IF MAILED IN THE UNITED STATES BUSINESS REPLY MAIL o FIRST CLASS PERMIT NO 1883 SANTA CLARA CA EEN 3Com Corporation Attn PCOps Technical Publications PO Box 58145 Santa Clara CA 95052 8145 USA PLEASE FOLD AND TAPE POSTAL
41. quipment CISPR A COMPLIANCE This device complies with the EMC directive of the European Community and meets or exceeds the following technical standard EN 55022 Limits and Methods of Measurement of Radio Interference Characteristics of Information Technology Equipment This device complies with the CISPR Class A standard WARNING This is a Class A product In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures 3Com Corporation 5400 Bayfront Plaza Santa Clara CA 95052 8145 408 764 5000 CE NOTICE Marking by the symbol C indicates compliance of this equipment to the EMC directive of the European Community Such marking is indicative that this equipment meets or exceeds the following technical standards EN 55022 Limits and Methods of Measurement of Radio Interference Characteristics of Information Technology Equiment EN 50082 1 Electromagnetic compatibility Generic immunity standard Part 1 Residential commercial and light industry IEC 801 2 Electromagnetic compatibility for industrial process measurement and control equipment Part 2 Electrostatic discharge requirements Severity level 3 IEC 801 3 Electromagnetic compatibility for industrial process measurement and control equipment Part 3 Radiated electromagnetic field requirements Severity level 2 IEC 801 4 Electromagnetic compatibility for industrial
42. r of independent segments as illustrated in Figure 4 3 px 100 meters Ee Collision domain maximum 200 meters maximum UTP span E UTP cable 100 meters maximum LinkSwitch 22 3000 Fiber 160 8 meters maximum Collision domain 260 8 meters UTP and fiber maximum span Figure 4 3 Using an Internetworking Device to Extend the Network Span Hub Specifications SPECIFICATIONS This appendix lists the specifications for the LinkBuilder FMS 100 TX Hub Physical Dimensions Length Width Height Weight 30 48 cm 12 in 43 94 cm 17 3 in 4 37 cm 1 72 in 5 5 kg 12 Ib Environmental Operating Ranges Operating temperature Storage temperature Humidity Altitude Power Requirements AC input voltage Inrush current AC input isolation Power consumption Heat output User replaceable fuse Repeater Classification 0 to 40 C 34 to 104 F 30 to 60 C 22 to 140 F 10 to 90 relative humidity noncondensing 3 050 m 10 000 ft operating 100 240 VAC 47 63 Hz 20 A peak for 1 2 cycle 250 VAC 2000 VAC 40 W maximum 136 5 BTU hr Fast blow 2 A 250 V Class TECHNICAL SUPPORT 3Com provides easy access to technical support information through a variety of services This appendix describes these services On line Technical offers worldwide product support seven days a week 24 hours a day Services 3Com Bulletin Board Service
43. s customer service and support 3Com s latest news releases selected articles from 3TECH 3Com s award winning technical journal and more 3ComForum is a CompuServe based service containing patches software drivers and technical articles about all 3Com products as well as a messaging section for peer support To use 3ComForum you need a CompuServe account To use 3ComForum 1 Log on to CompuServe 2 Entergo threecom 3 Press Return to see the 3ComForum main menu 3ComFacts Automated Fax Service Support from Your Network Supplier Support from Your Network Supplier B 3 3Com Corporations interactive fax service 3ComFacts provides data sheets technical articles diagrams and troubleshooting instructions on 3Com products 24 hours a day seven days a week Call 3ComFacts using your touch tone telephone International access numbers are Country Telephone Number Hong Kong 852 2537 5610 U K 44 1442 278279 U S 1 408 727 7021 Local access numbers are available within the following countries Country Telephone Number Country Telephone Number Australia 800123553 Netherlands 060228049 Belgium 0800 71279 Norway 800 11062 Denmark 800 17319 Portugal 0505 442607 Finland 98 001 4444 Russia Moscow only 956 0815 France 05 90 81 58 Spain 900 964445 Germany 0130 8180 63 Sweden 020 792954 Italy 1678 99085 UK 0800 626403 If additional assistance is required contact your network supplier Many su
44. s of an IEEE 802 3 repeater as listed in Table 1 1 Table 1 1 Supported IEEE 802 3 Repeater Functions Standard Repeater Function Signal retiming Carrier integrity monitor Jabber control Automatic partition reconnection Description Restores the timing and amplitude of the received signal before retransmitting the signal Examines the packets being received for invalid framing blocks excessive invalid frames to prevent them from harming the network Inhibits overly long transmissions of data generated by station hardware failure This function is activated once a received packet has exceeded the jabber threshold Refer to the 802 3u specification for additional information Prevents the faulty segment s carrier activity from reaching the hub and being propagated throughout the network Unpacking the Hub INSTALLING THE FMS 100 TX Hus This chapter discusses the following topics Unpacking the hub Positioning the hub Installing the hub Installing the transceiver interface modules Using the Redundant Power System Replacing the fuse When unpacking the hub follow these steps Open the shipping container and carefully remove its contents Return all packing materials to the shipping container and save it If the hub must be returned ship it in its original shipping container or one providing equivalent protection or the warranty will be voided Verify that you have received all items that are shipped
45. s of data Warnings alert you to the risk of severe personal injury General Description INTRODUCTION The LinkBuilder FMS 100 TX Hub is a member of the 3Com SuperStack system of stackable network devices The 100 designation refers to 100BASE T Fast Ethernet which is an extension of the Ethernet IEEE 802 3 specifications The 100BASE T specification supports the following 100 Mbps media options 100BASE TX two pair Category 5 UTP cabling 100BASE T4 four pair Category 3 4 or 5 UTP cabling 100BASE FX two strand fiber cabling The LinkBuilder FMS 100 TX Hub complies with the definition of a Class repeater provided in the IEEE 802 3 standard Refer to the section Classification of Repeaters in Chapter 3 for a description of the IEEE 802 3 repeater classification This guide discusses the LinkBuilder FMS 100 TX Hub and the 100BASE TX and 100BASE FX transceiver interface modules The LinkBuilder FMS 100 TX Hub which functions as a network repeater and supports 100 Mbps connectivity has 12 dedicated RJ 45 twisted pair ports on its front panel as shown in Figure 1 1 A media flexible transceiver interface module port on the hubs rear panel is designated the thirteenth port 1 2 CHAPTER 1 INTRODUCTION Port LEDs RJ 45 ports operation P LEDs Unit digital display Figure 1 1 Front Panel of LinkBuilder FMS 100 TX Hub Each port including the thirteenth port is supplied with three LEDs that pr
46. sent prepaid insured and packaged appropriately for safe shipment The repaired or replaced item will be shipped to Customer at 3Com s expense not later than thirty 30 days after receipt by 3Com WARRANTIES EXCLUSIVE IF A 3COM PRODUCT DOES NOT OPERATE AS WARRANTED ABOVE CUSTOM ER S SOLE REMEDY SHALL BE REPAIR REPLACEMENT OR REFUND OF THE PURCHASE PRICE PAID AT 3COM S OPTION THE FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ARE IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED EITHER IN FACT OR BY OPERATION OF LAW STATUTORY OR OTHERWISE INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 3COM NEITHER ASSUMES NOR AUTHORIZES ANY OTHER PERSON TO ASSUME FOR IT ANY OTHER LIABILITY IN CONNECTION WITH THE SALE INSTALLATION MAINTENANCE OR USE OF ITS PRODUCTS 3COM SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND EXAMINATION DISCLOSE THAT THE ALLEGED DEFECT IN THE PRODUCT DOES NOT EXIST OR WAS CAUSED BY CUSTOMER S OR ANY THIRD PERSON S MISUSE NEGLECT IMPROPER INSTALLATION OR TESTING UNAUTHORIZED ATTEMPTS TO REPAIR OR ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE OR BY ACCIDENT FIRE LIGHTNING OR OTHER HAZARD LIMITATION OF LIABILITY IN NO EVENT WHETHER BASED IN CONTRACT OR TORT INCLUDING NEGLIGENCE SHALL 3COM BE LIABLE FOR INCIDENTAL CONSEQUENTIAL INDIRECT SPECIAL OR PUNITIVE DAMAGES OF ANY KIND OR FOR LOSS OF REVENUE LOSS OF BUSINESS OR OTHER FINANCIAL LOSS ARISING OUT OF OR IN C
47. sion UP expansion port Figure 3 4 Interconnecting Two Hubs Making Network Connections 3 5 Hub to You can connect the hub or a hub stack to a Management Unit by using Management Unit the expansion cable Connect the UP expansion port on the hub s rear panel to the DOWN expansion port on the Management Unit s rear panel as shown in Figure 3 5 3Com strongly recommends that you place the Management Unit on top of gt the hub stack so it will be unit number 1 This will ensure that existing nonvolatile port configuration information is applied to the correct physical unit in the stack Management Unit Figure 3 5 Connecting a Hub Stack to a Management Unit The maximum number of units in a stack is eight including the Management Unit If you wish you can add two Redundant Power Systems to a stack of eight units seven hubs and one Management Unit or eight hubs with no other device 3 6 CHAPTER 3 MAKING FMS 100 HUB CONNECTIONS Hub to Backbone You can connect hubs and hub stacks to the network backbone through Using Transceiver Interface Modules the transceiver interface module on the rear panel via a bridge router or switch using either Category 5 UTP or fiber cabling Figure 3 6 shows single and interconnected hubs connected to a network backbone To network backbone
48. ts following media specifications m L00BASE TX two pairs of Category 5 twisted pair UTP wire m 100BASE FX two strand fiber optic cabling 62 5 125 u multimode cable Topology Rules The key 100BASE T topology rules are illustrated in this section Hub to Connected The maximum UTP cable length between the hub and connected Workstations workstations is 100 meters See Figure 4 1 100 meters maximum Figure 4 1 Connecting the Hub to a Workstation Topology Rules 4 3 One Class Repeater total network span of 260 8 meters combined UTP and fiber cabling is allowed in single Class hub topologies one hub stack per wiring closet with a fiber run to the collapsed backbone For example you could use a 160 8 meter fiber downlink from the hub to a router bridge or switch with a 100 meter maximum UTP run from the hub to the desktops See Figure 4 2 Fiber backbone x 160 8 meters maximum Er Router bridge or switch LinkBuilder FMS 100 Hub class UTP cable 100 meters maximum Figure 4 2 Connecting the Hub in a Network Span of 260 8 Meters The maximum network span using only UTP cabling is 200 meters If only fiber cable is used the maximum span in 272 meters 4 4 CHAPTER 4 CABLING If greater distances and more ports are required you can use an internetworking device such as a bridge router or switch to isolate traffic between workgroups This would divide the network into a numbe
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