3Com DUA1800-0AAA04 - Manual

A BOUT T HIS G UIDE About This Guide This guide is intended for use only by the following: ■ the Network Administrator responsible for the management and maintenance of the network. ■ the installation engineer responsible for installing hardware. This guide contains all the information you need to s...

x A BOUT T HIS G UIDE DUA1800-0AAA04 Special Messages A special format indicates notes, cautions, and warnings. These messages are defined as follows. Notes call attention to important features or instructions. CAUTION: Cautions contain directions that you must follow to avoid immediate system damag...

1 W HAT I S T HE L INK B UILDER MSH? This chapter introduces: ■ The LinkBuilder MSH and the services it provides ■ The modules ■ A brief explanation of the display panel, power supply units and thermal management unit. WARNING: Installation and configuration of the MSH chassis, i.e., removal and rep...

1-2 C HAPTER 1: W HAT I S T HE L INK B UILDER MSH? DUA1800-0AAA04 Power is supplied to the chassis via one or two power supply units and the chassis is kept cool with a thermal management unit . Your local interface with the MSH is via a display panel which for convenience may be installed at the fr...

1-4 C HAPTER 1: W HAT I S T HE L INK B UILDER MSH? DUA1800-0AAA04 Available to order, but not shown on Figure 1-1: The Cable Support Kit - Takes the weight of network cables and prevents strain on the connections. See The Cable Support Tray on page 1-10 and Appendix E for ordering information. The M...

DUA1800-0AAA04 The Chassis 1-5 The Backplane The backplane provides the following services to the MSH: ■ Ethernet support via a medium speed CSMA/CD bus ■ Token ring support via a flexible high speed bus ■ FDDI support via a flexible high-speed bus (3C18001 or converted 3C18000) ■ Management via a s...

1-6 C HAPTER 1: W HAT I S T HE L INK B UILDER MSH? DUA1800-0AAA04 ECS modules can connect to any of the three buses, however, you should note that an ECS module attached to Buses E2 or E3 will not have full statistics gathering facilities. Note also that an ECS module should only be installed in slo...

DUA1800-0AAA04 The Chassis 1-7 . Figure 1-3 Token ring backplane operation You will find further information about this subject in Chapter 3, The Modules on page 1-8 in this user guide and in the user guide that accompanies each module. FDDI Support The MSH chassis (3C18001) which is fitted with a F...

1-8 C HAPTER 1: W HAT I S T HE L INK B UILDER MSH? DUA1800-0AAA04 management port, a remote manager using Telnet or an SNMP management application such as one of the 3Com Transcend range. The Modules The range of modules available for installation into the LinkBuilder MSH is constantly being extende...

DUA1800-0AAA04 The Display Panel 1-9 Power is supplied to the chassis via two IEC sockets (the top socket serves the left-hand PSU) on a fixed power inlet panel fitted in the chassis between the right-hand PSU slot (PSU 2), and the module slots. The two sockets provide resilience against power suppl...

1-10 C HAPTER 1: W HAT I S T HE L INK B UILDER MSH? DUA1800-0AAA04 If you have a Management Module installed, you can access read-only information telling you how the chassis is set up. More details can be found in the user guide that accompanies the Management Module. For convenience, the display p...

DUA1800-0AAA04 Management Of The LinkBuilder MSH 1-11 Management Of The LinkBuilder MSH You are advised to install a LinkBuilder Management Module into the MSH. This will enable you to more effectively manage the multiservice facilities of the MSH. There are four possible methods of management. ■ If...

2 I NSTALLING T HE L INK B UILDER MSH This chapter provides: ■ An overview of the steps needed to install the MSH ■ Details of how to install the chassis ■ Details of how to install: ■ a power supply unit ■ the display panel ■ the thermal management unit ■ the rack/cable mounting kit WARNING: Mainte...

2-2 C HAPTER 2: I NSTALLING T HE L INK B UILDER MSH DUA1800-0AAA04 3 Install modules and a Management Module if you are using one, into the chassis, and check their operation 4 Attach your network cabling to the modules you have installed. A Suitable Site For Installation Before you install the MSH,...

DUA1800-0AAA04 Introduction 2-3 If MSH chassis are mounted one above the other, there must be adequate space between them for cooling air to pass. When fitted, the cable support tray, which can be ordered from your local LinkBuilder supplier, provides the correct spacing between units. If you do not...

2-4 C HAPTER 2: I NSTALLING T HE L INK B UILDER MSH DUA1800-0AAA04 There are two sets of holes on each side of the MSH chassis. These allow for fitting the mounting brackets to two different positions: ■ If you decide to have the face of the chassis that takes the cable connections and shows module ...

DUA1800-0AAA04 Introduction 2-5 The Locking Bar The MSH chassis is delivered with a locking bar fitted. Once the MSH is fully assembled and installed, you must refit this locking bar. This will prevent the removal and replacement of power supplies, modules etc. by unqualified personnel. Fitting The ...

2-6 C HAPTER 2: I NSTALLING T HE L INK B UILDER MSH DUA1800-0AAA04 Assembling The LinkBuilder MSH WARNING: During installation and maintenance operations, the powered-up MSH must not be left unattended Safety Information WARNING: This equipment must be earthed. Disconnect both power leads before ser...

DUA1800-0AAA04 Safety Information 2-7 ■ The minimum specifications for the flexible lead are: ■ - No. 18 AWG ■ - Type SV or SJ ■ - 3-conductor ■ The power lead must have a rated current capacity of at least 10A. ■ The attachment plug must be an earth-grounding type with a NEMA 5-15P (15A, 125V) or N...

2-8 C HAPTER 2: I NSTALLING T HE L INK B UILDER MSH DUA1800-0AAA04 The Power Supply Unit And Power Inlet Panel We recommend that you install two units. Further power supply units are available from your LinkBuilder supplier: see Appendix E Ordering Information . See Appendix C for details of configu...

DUA1800-0AAA04 The Power Supply Unit And Power Inlet Panel 2-9 Installing The Power Supply Unit We recommend that, if a single power supply unit is to be used to power the MSH, the power supply unit should be installed into the slot at the far left of the chassis. This position optimizes ventilation...

2-10 C HAPTER 2: I NSTALLING T HE L INK B UILDER MSH DUA1800-0AAA04 supply unit is to be installed into the chassis, the blanking plate covering the remaining power supply unit slot must be removed. See Blanking Plates on page 3-16. 4 Orientate the power supply unit so that the ejector showing the p...

2-12 C HAPTER 2: I NSTALLING T HE L INK B UILDER MSH DUA1800-0AAA04 6 Simultaneously, press the ejector flaps firmly down into the closed position. See Figure 2-4. Check that the module has been properly seated by placing both your thumbs on the front panel and firmly pushing the module home. Check ...

DUA1800-0AAA04 The Power Supply Unit And Power Inlet Panel 2-13 . Figure 2-5 Removing the PSU Replacing The Power Supply Fuses Two fuses are fitted in removable cartridges located on the power inlet panel. WARNINGS: The power inlet panel must not be removed from the chassis; therefore fuse replaceme...

2-14 C HAPTER 2: I NSTALLING T HE L INK B UILDER MSH DUA1800-0AAA04 6.3 x 32mm, ceramicReplace fuse ONCE only. If the unit consistently blows fuses, there may be a problem. Contact your supplier for advice. Figure 2-6 Replacing Fuses - removing the cartridge To replace one of these fuses proceed as ...

DUA1800-0AAA04 The Display Panel 2-15 3 Replace the cartridge into the power inlet panel and secure using the screwdriver. The Display Panel The display panel provides your local interface to the control of the MSH. For a description of its functionality and instructions on how to use it, please ref...

2-16 C HAPTER 2: I NSTALLING T HE L INK B UILDER MSH DUA1800-0AAA04 1 Remove the three screws that secure the display panel to the MSH chassis. 2 Carefully disengage the flexi-ribbon connector taking care not to bend the pins on the connector, and move the panel away from the chassis. Installing The...

DUA1800-0AAA04 The Thermal Management Unit 2-17 ensure that the connection is good. The connector is keyed, so if necessary turn it around to make it fit the socket. 3 Locate the display panel into position at the top of the chassis. Secure using the three screws provided. The Thermal Management Uni...

2-18 C HAPTER 2: I NSTALLING T HE L INK B UILDER MSH DUA1800-0AAA04 WARNING: You cannot replace individual fans in the thermal management unit. If failure of a fan occurs, the entire unit must be replaced as soon as possible. Installing The Thermal Management Unit You will need a flat-tipped screwdr...

DUA1800-0AAA04 The Thermal Management Unit 2-19 Removing The Thermal Management Unit Refer to Figure 2-8. The MSH does not have to be powered down before carrying out the procedure. 1 Loosen two screws to remove the locking bar. 2 Using a screwdriver loosen the two captive screws that secure the the...

2-20 C HAPTER 2: I NSTALLING T HE L INK B UILDER MSH DUA1800-0AAA04 Figure 2-9 Removing/fitting filters 1 Remove the thermal management unit from the MSH chassis as instructed previously and turn it upside down on a flat surface. 2 The filters are located in holders, one protecting each fan. Refer t...

DUA1800-0AAA04 The Thermal Management Unit 2-21 connections. When fitted, the cable support tray also provides the correct clearance between chassis mounted one above the other. If you decide to use the tray, the user guide holder that is located underneath the chassis (see Storing The User Guides o...

DUA1800-0AAA04 Completing The Installation 2-23 Figure 2-11 Cables at the front of the MSH Completing The Installation Complete the installation by fittiing the modules you require. Refer to Chapter 3 of this user guide, and to the user guides accompanying the individual modules and Management Modul...

2-24 C HAPTER 2: I NSTALLING T HE L INK B UILDER MSH DUA1800-0AAA04 Power-up The LinkBuilder MSH When you have completed all stages of installing the MSH as outlined in this chapter, and have connected all the cable segments to your modules, the MSH is ready for operation. 1 Check that all connectio...

3 I NSTALLING M ODULES I NTO T HE MSH C HASSIS This chapter provides: ■ An introduction to Ethernet, token ring and FDDI modules ■ A general overview for installing modules into the MSH chassis ■ Instructions for fitting LinkBuilder ECS modules into the MSH chassis ■ Instructions for fitting blankin...

3-2 C HAPTER 3: I NSTALLING M ODULES I NTO T HE MSH C HASSIS DUA1800-0AAA04 A Quick Check Before You Install Modules As mentioned before you can insert up to eleven modules of mixed media into the LinkBuilder MSH. The range of modules that are available from 3Com allows many combinations and permuta...

DUA1800-0AAA04 Introduction 3-3 Figure 3-1 Ethernet module functions Repeater Interface. This interface allows the transfer of Ethernet packets, via the backplane, between the different modules and the management module. Isolation logic allows a module to act as a sub-network. See Repeater Functions...

3-4 C HAPTER 3: I NSTALLING M ODULES I NTO T HE MSH C HASSIS DUA1800-0AAA04 ■ Resilient links can be set up. See Figure 3-2 below. A resilient link consists of a main port and a stand-by port which are both set up locally via the display panel or remotely via a Network Manager. The main port is the ...

DUA1800-0AAA04 Introduction 3-5 Partitioning of a segment from the rest of the network will occur if the module detects thirty-two consecutive collisions on a segment or if it detects a single collision of between 1,000 and 30,000 bit times. Once a segment has been partitioned, the module will pass ...

3-6 C HAPTER 3: I NSTALLING M ODULES I NTO T HE MSH C HASSIS DUA1800-0AAA04 ■ Firstly, each frame is examined for the destination address, and passed intact to the port associated with that address. For 10Base-T, fiber or AUI, this is equivalent to passing direct to the addressed device. Every other...

DUA1800-0AAA04 Introduction 3-7 whether a specified port on a module is connected to another MSH (Inter-repeater Link) or to an end-station. You will find further information in the user guides that accompany Repeater Modules. 4 Port Ethernet Bridge The 4 port bridge module connects the three Ethern...

3-8 C HAPTER 3: I NSTALLING M ODULES I NTO T HE MSH C HASSIS DUA1800-0AAA04 Figure 3-3 Using transceiver modules Modules for the ECS Chassis Although you may use any ECS Module in the MSH chassis by attaching the special converter (3C18082), the following modules may be of particular interest. fiber...

DUA1800-0AAA04 Introduction 3-9 Local Bridge Modules. A local bridge module allows you to connect two Local Area Networks together to form an Extended Local Area Network. It allows you to extend beyond the physical limitations of a single network and provides sophisticated filtering between the netw...

3-10 C HAPTER 3: I NSTALLING M ODULES I NTO T HE MSH C HASSIS DUA1800-0AAA04 Token Ring Modules The operation of 3Com token rings is described in Volume 3 of the user guide that accompanies the MSH management module. Token rings in the MSH chassis are built from two types of module: ■ Media Access U...

DUA1800-0AAA04 Introduction 3-11 A block of LEDs shows the status of each of the twelve lobes attached to the module. Another five LEDs provide information on the state of the module. The MAU module can operate in two modes: ■ Enabled Mode - the MAU is connected to a local ring section. All of the r...

3-12 C HAPTER 3: I NSTALLING M ODULES I NTO T HE MSH C HASSIS DUA1800-0AAA04 ■ The ability to allow any MAU or Bridge to be assembled into a ring, independent of its physical location. ■ Signals are retimed when they enter or leave the RingBuilder module at RI (Ring-In) and RO (Ring-Out). This incre...

DUA1800-0AAA04 Introduction 3-13 Token Ring Bridge The 2 port token ring bridge connects between two rings and controls the traffic between the rings. The management interface is menu driven. FDDI Modules To use FDDI Modules, you must have the special MSH model (3C18001) or have the special backplan...

3-14 C HAPTER 3: I NSTALLING M ODULES I NTO T HE MSH C HASSIS DUA1800-0AAA04 Port Modules Two Port Modules are available: ■ 4 port FDDI Fiber (MIC) Module ■ 6 port FDDI UTP (RJ45) Module These units provide connections to the FDDI concentator. FDDI Media Modules Small modules, similar to the Etherne...

DUA1800-0AAA04 Handling Modules 3-15 user guide which came with your FDDI RingBuilder module for more details. LinkSwitch Expansion Module The LinkSwitch Expansion Module must be installed next to a LinkSwitch module. It provides six RJ45 Ethernet ports connected to the rest of the network through t...

3-16 C HAPTER 3: I NSTALLING M ODULES I NTO T HE MSH C HASSIS DUA1800-0AAA04 Before You Begin Blanking Plates The MSH chassis is supplied with blanking plates to cover single or multiple module slots. The blanking plate sizes are: ■ 1 slot ■ 3 slots ■ 5 slots It is essential that unpopulated slots a...

DUA1800-0AAA04 LinkBuilder MSH Modules 3-17 Choosing Slots For Modules All slots in the MSH chassis have the same functionality and therefore you are not restricted as to where in the chassis you place Ethernet and Token Ring modules. However, we make the following recommendations for practicality a...

3-18 C HAPTER 3: I NSTALLING M ODULES I NTO T HE MSH C HASSIS DUA1800-0AAA04 Installing/Removing A Module 1 Remove the locking bar from the front of the MSH chassis. 2 Ensure that the chassis is installed correctly and all necessary cables are present. Prepare a slot to receive the module, removing ...

3-20 C HAPTER 3: I NSTALLING M ODULES I NTO T HE MSH C HASSIS DUA1800-0AAA04 Removing A Module 1 Warn all users who are likely to be affected. Remove all network connections from the module that you wish to remove. 2 Remove the locking bar from the front of the chassis. 3 To unlock the module ejecto...

DUA1800-0AAA04 LinkBuilder ECS Modules 3-21 LinkBuilder ECS Modules With the exception of the LinkBuilder ECS management modules (types 3C12030 and 3C12031) all other LinkBuilder ECS modules can be installed into the MSH chassis by using a module converter. See Installing/Removing LinkBuilder ECS Mo...

3-22 C HAPTER 3: I NSTALLING M ODULES I NTO T HE MSH C HASSIS DUA1800-0AAA04 Figure 3-6 Setting the switch position on the converter Fitting The ECS Module Converter 1 Locate the block of three link positions LK1, LK2 and LK3 on the converter: see Figure 3-6. The position of the link itself determin...

DUA1800-0AAA04 LinkBuilder ECS Modules 3-23 to which Bus the module is routed:Link set to LK1 - Module routed to Bus E1Link set to LK2 - Module routed to Bus E2Link set to LK3 - Module routed to Bus E3Note that the Bus can also be set via management. 2 Set link LK4 as follows: ■ If you are fitting t...

3-24 C HAPTER 3: I NSTALLING M ODULES I NTO T HE MSH C HASSIS DUA1800-0AAA04 Figure 3-7 Fitting the converter Installing The ECS Module Into The Chassis 1 Remove the locking bar from the front of the chassis. 2 Ensure that the MSH chassis is installed correctly and all necessary cables are present. ...

DUA1800-0AAA04 LinkBuilder ECS Modules 3-25 5 Make sure that the converter is securely fitted to the module. Engage the module into the slot, using just sufficient force to ensure that the connector on the edge of the converter mates with the socket on the MSH backplane. 6 Locate the two round-heade...

4 U SING T HE D ISPLAY P ANEL This chapter provides: ■ An introduction to the display panel ■ An interpretation of the LEDs and instructions for testing them ■ Steps for resetting the MSH ■ An overview of managing the MSH WARNING: Maintenance operations described in this chapter must be carried out ...

4-4 C HAPTER 4: U SING T HE D ISPLAY P ANEL DUA1800-0AAA04 The LEDs The LEDs located on the display panel are provided for two reasons: ■ to assure you that the MSH is operating normally ■ to give you immediate notice should a fault occur Table 4-1 shows the possible states of the LEDs and how to in...

DUA1800-0AAA04 The LEDs 4-5 To diagnose problems related to module LEDs, you will need to refer to the module user guide Unless otherwise stated, the LEDs will function without an operational Management Module installed in the chassis. If an LED indicates a fault, Chapter 5 gives you advice and step...

4-6 C HAPTER 4: U SING T HE D ISPLAY P ANEL DUA1800-0AAA04 Resetting The LinkBuilder MSH The display panel carries a facility for resetting the LinkBuilder MSH. This operation restarts the entire MSH chassis, including the display panel and installed modules. 1 Press and hold down the Reset button a...

DUA1800-0AAA04 Management 4-7 The RS232 Serial Port Out-of-band management can be implemented via the 25-way D-type RS232 port located on the left-hand side of the display panel. This facility is provided for the initial setup of the MSH IP address and if the primary network link to management fails...

5-2 C HAPTER 5: P ROBLEM S OLVING DUA1800-0AAA04 Spares The LinkBuilder MSH has been designed to provide resilience and reliability. It is good practice that you hold spares. We recommend that you have 1 spare module or power supply unit for every 10 in use. In the unlikely event that you have probl...

DUA1800-0AAA04 Spot Checks 5-3 Management Module. Check that the Management Module is secure in position. If you discover a problem, refer to Fault Diagnosis Using The LEDs on page 5-4 and Obtaining Help on page 5-5. Cleaning It is important that the MSH, and the environment in which the MSH is site...

5-4 C HAPTER 5: P ROBLEM S OLVING DUA1800-0AAA04 Fault Diagnosis Using The LEDs Table 5-1 Fault diagnosis using the LEDs and corrective actions LED Status Actions to take Power OFF Carry out a lamp test to make sure that the LED has not failed. Make sure that the power cables are plugged in at the w...

DUA1800-0AAA04 Obtaining Help 5-5 Obtaining Help If any of the MSH equipment fails to operate correctly and you cannot solve the problem yourself after following advice in this chapter, contact your supplier with the following information before returning the item(s). ■ Serial number ■ Revision numb...

A S TANDARDS USED IN THE DESIGN Standards and Approvals The MSH chassis and its associated accessories have been designed to conform to the following standards: Safety UL 1950 CSA 22.2 #950 EN 60950 BS 6301 Environmental IEC 68 Electromagnetic Compatability EN 55022 Level A FCC Part 15 Level A VFG 2...

A-2 A PPENDIX A: S TANDARDS USED IN THE DESIGN DUA1800-0AAA04 Functional ISO 8802/3 IEEE 802.3 IEEE 802.5 The standards applicable to the modules and the management modules installed in the chassis are listed in the corresponding user guides. BABT Approval For UK users only The LinkBuilder MSH chass...

B T ECHNICAL S PECIFICATION MSH Chassis - 3C18000 and 3C18001 Dimensions Height 400.5mm (15.8in) Width 436mm (17.2in) Depth 335mm (13.2in) Weight 3C18000 Chassis - empty* 16.2Kg (35.7lb) 3C18001 Chassis - empty* 16.6Kg (35.4lb) * without modules, display panel or power supply units fitted, but inclu...

B-2 A PPENDIX B: T ECHNICAL S PECIFICATION DUA1800-0AAA04 Display Panel - 3C18006 Weight Display Panel 190g (0.4lb) Electrical Consumption 700mA (max) at +5V 375W Power Supply Unit - 3C18011 Weight PSU 2290g (5lb) Electrical Maximum Output Power 375W Output Voltages +5V*, -9V (isolated) and +12V * M...

B-4 A PPENDIX B: T ECHNICAL S PECIFICATION DUA1800-0AAA04 ECS - MSH Module Converter - 3C18082 Dimensions Height 137.0mm (5.4in) Depth 64.0mm (2.5in) Weight Converter 100g (0.2lb) Electrical Consumption 550mA at +5V Environmental Maximum Operating Range 0 ° C to 40 ° C (32 ° F to 104 ° F) Relative H...

C MSH P OWER C ONSUMPTION L IMITS Calculating Power Consumption It is important that you calculate the total power consumption and total current consumption required by the LinkBuilder MSH chassis and the modules that you intend to install in the MSH chassis. Only by calculating these values can you...

C-2 A PPENDIX C: MSH P OWER C ONSUMPTION L IMITS DUA1800-0AAA04 Power consumption calculations must include the power used by the chassis and its components. ■ The basic chassis (3C18000), fitted with display panel, thermal management unit and backplane, consumes 67 watts (5.7 A @ +5V and 3.2A @ +12...

D P IN A ND C IRCUIT A SSIGNMENTS Ethernet RJ45 - Pin Assignments Pin Number Signal Function 1 TxData+ Transmit Data 2 TxData- Transmit Data 3 RxData+ Receive Data 4 Not Assigned 5 Not Assigned 6 RxData- Receive Data 7 Not Assigned 8 Not Assigned Chassis.bk : APPENDD Page 1 Monday, February 10, 1997...

D-2 A PPENDIX D: P IN A ND C IRCUIT A SSIGNMENTS DUA1800-0AAA04 Ethernet Telco - Pin Assignments Port Number Telco ConnectorPin Number Telco SignalName To RJ45Pin Number RJ45 SignalName 1 126227 Tx Data -Tx Data +Rx Data -Rx Data + 2163 Tx Data -Tx Data +Rx Data -Rx Data + 2 328429 Tx Data -Tx Data ...

D-4 A PPENDIX D: P IN A ND C IRCUIT A SSIGNMENTS DUA1800-0AAA04 Token Ring RJ45 - Pin Assignments Ring-In and Ring-Out Pin Assignments Signal Purpose R/I Pins R/O Pins Tx+ Transmit Data 5 1 Tx- Transmit Data Inverted 9 6 Rx+ Receive Data 1 5 Rx- Receive Data Inverted 6 9 +5V Phantom Power 3 3 gnd Gr...

DUA1800-0AAA04 RS232 Serial Port - Pin Assignments D-5 RS232 Serial Port - Pin Assignments Status Input Connector Pin Number Signal Function 1 Ground Protective Ground 2 TxData Transmit Data 3 RxData, Receive Data 4 RTS Request To Send 5 CTS Clear To Send 6 DSR Data Set Ready 7 Ground Signal Ground ...

E O RDERING I NFORMATION Product Numbers Chassis Components MSH Chassis 3C18000 MSH Chassis for FDDI 3C18001 MSH Thermal Management Unit 3C18005 MSH Display Panel 3C18006 MSH 375W Power Supply Unit 3C18011 One of each of the three items immediately above is provided with each chassis. However, if yo...

E-2 A PPENDIX E: O RDERING I NFORMATION DUA1800-0AAA04 Ethernet Products ECS to MSH Module Converter 3C18082 Non-smart Secure 10Base-T Repeater Module 3C18110 Smart 13 Port 10Base-T Repeater Module (Telco & Tcvr) 3C18120 Smart 12 Port 10Base-T Repeater Module (12xRJ45) 3C18121 Smart 24 Port 10Ba...

DUA1800-0AAA04 Product Numbers E-3 Token Ring Products UTP Token Ring MAU (12 port, RJ45) 3C18200 STP Token Ring MAU (12 port, RJ45) 3C18201 RingBuilder Module (STP, DB9) 3C18210 RingBuilder Second MAC Option 3C18221 Cable, shielded RJ45 - DB9(for direct connection to NetBuilder) 3C18233 2 port Brid...

E-4 A PPENDIX E: O RDERING I NFORMATION DUA1800-0AAA04 Suppliers Please contact your supplier for the above items. In case of difficulty, 3Com will be pleased to give information on suppliers in your area. The addresses are shown on the inside of the back cover. Chassis.bk : APPENDE Page 4 Monday, F...

F T ECHNICAL S UPPORT 3Com provides easy access to technical support information through a variety of services. This appendix describes these ser-vices. On-line Technical Services 3Com offers worldwide product support seven days a week, 24 hours a day, through the following on-line systems: ■ 3Com B...

F A PPENDIX F: T ECHNICAL S UPPORT DUA1800-0AAA04 Ask3Com on CompuServe Ask3Com is a CompuServe-based service containing patches, software, drivers, and technical articles about all 3Com products, as well as an interactive forum for technical questions. To use Ask3Com, you need a CompuServe account....

DUA1800-0AAA04 3Com Documentation on CD-ROM F ■ NetFacts provides data sheets and technical articles on 3Com Cor- poration’s hub, bridge, router, terminal server, and software prod-ucts. Document 8888 provides you with an index of system product documents. Call 3ComFacts using your touchtone telepho...

F A PPENDIX F: T ECHNICAL S UPPORT DUA1800-0AAA04 Support from Your Network Supplier If additional assistance is required, contact your network supplier. Many suppliers are authorized 3Com service partners who are qualified to provide a variety of services, including network plan-ning, installation,...

DUA1800-0AAA04 Returning Products for Repair F Returning Products for Repair 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....

I NDEX Numerics 3ComBBS 3ComFacts A Ask3Com B backplane Ethernet FDDI LinkBuilder MSH selection token ring blanking plates brackets bulletin board system C cable support tray CDDI 6 port module chassis LinkBuilder MSH CompuServe, See Ask3Com converter,ECS module D display panel installing lamps butt...

R ADIO F REQUENCY I NTERFERENCE S TATEMENTS FCC Statement This equipment has been tested with a class A computing device and has been found to comply with part 15 of FCC Rules. Opera-tion in a residential area may cause unacceptable interference to radio and TV receptions requiring the operator to t...