3Com 52x manuale d’uso

® http://www.3com.com/ Installing the SuperStack ® II NETBuilder ® T oken Ring and FRAD Bridge/Router Models 32x and 52x Part No. 09-0848-003 Published May 1997 SS2TRHWBook Page i Monday, May 5, 1997 3:11 PM[...]

ii 3Com Corporation 5400 Bayfront Plaza Santa Clara, California 95052-8145 Copyright © 3Com Corporation, 1997. All rights reserved. No part of this documentation may be repr oduced 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 Corp[...]

iii Modifications Modifications or changes made to this device, and not approved by 3Com, may void the authority granted by the FCC, or other such agency , to operate this equipment. Shielded Cables Connections between 3Com equipment and other equipment and peripherals must be made using shielded cables in order to maintain compliance with FCC, a[...]

iv CE Notice Marking by the following symbol indicates compliance of this equipment with the EMC and T elecom Directives 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 informatio[...]

v C ONTENTS A BOUT T HIS G UIDE Conventions 1 1 I NSTALLING THE H ARDWARE Required Equipment 1-1 Mounting 1-3 Rack-Mount Kit 1-3 Installing on a T abletop 1-3 Stacking with Brackets 1-4 Installing in a Rack 1-4 Cabling the Connectors 1-5 Cabling the LAN Connector (Models 323, 327, and 52x) 1-6 Cabling the ISDN Connector (Model 52x) 1-6 Cabling the [...]

vi Connectors and Cables 2-3 Console Cables 2-3 PC Cable 2-4 T erminal Cable 2-5 Modem Cable 2-6 LAN Connectors and Cables 2-6 UTP Connector and Cable 2-6 STP Connector and Cable 2-7 Cabling Standards 2-8 Serial Cables 2-9 V .35 to V .35 DCE Cable (32x) 2-9 V .35 to V .35 Direct Connect Cable (32x) 2-10 UNIVERSAL to V .35 Adapter Cable 2-11 UNIVERS[...]

vii A P ROVISIONING Y OUR ISDN L INE Ordering North American ISDN BRI Services A-1 North American Switch Provisioning T ables A-3 A T&T 5ESS Switch A-4 A T&T 5ESS Custom Switch A-5 DMS 100 and National ISDN A-6 Siemens EWSD Switch A-7 SPIDs A-7 NT1s and Power Supplies A-8 Ordering German ISDN BRI Services A-9 B T ECHNICAL S UPPORT Online T [...]

viii SS2TRHWBook Page viii Monday, May 5, 1997 3:11 PM[...]

A BOUT T HIS G UIDE This guide includes complete hardwar e installation and cabling information for your SuperStack ® II NETBuilder ® bridge/router model 32x or 52x. This guide is for the following audience: ■ Inexperienced end users configuring their first internetworking device ■ Experienced network administrators who are configuring the[...]

2 C HAPTER : A BOUT T HIS G UIDE SS2TRHWBook Page 2 Monday, May 5, 1997 3:11 PM[...]

1 I NSTALLING THE H ARDWARE This chapter describes how to install your SuperStack II NETBuilder bridge/router . Requir ed Equipment T able 1-1 lists the items you r eceive in the shipping carton and items you need to provide. T able 1-1 Equipment Received and Equipment Needed Shipping carton contents SuperStack II NETBuilder bridge/router Power cab[...]

1-2 C HAPTER 1: I NSTALLING THE H ARDWARE * The software is preinstalled in the flash memory drive of the bridge/router and automatically loads when you turn on the power. The software CD-ROM is for software recovery purposes only. W ARNING: T o eliminate cable noise emission in excess of FCC regulations, part 15, subpart J, and EN55022B, all inter[...]

Mounting 1-3 Mounting Y ou can mount your bridge/r outer on a tabletop, stack it, or mount it in a rack. Rack-Mount Kit The rack-mount kit contains the following hardware: Figure 1-1 Rack-Mount Kit Contents Installing on a T abletop If you plan to install your bridge/router on a tabletop, attach the rubber feet as shown. Two rack-mount brackets Two[...]

1-4 C HAPTER 1: I NSTALLING THE H ARDWARE Stacking with Brackets The stacking brackets can be used to securely stack several bridge/routers on a tabletop. Use the stacking brackets and the M4x8 mm panhead stacking screws shown in Figure 1-1. Installing in a Rack T o install the bridge/router in a rack, use the rack-mount brackets and the M4x10 mm ?[...]

Cabling the Connectors 1-5 2 Hold the chassis between the poles of the rack and attach the brackets to the rack using panhead screws (you must pr ovide these screws). T ighten each screw secur ely . CAUTION: Using fewer than two screws to secure the brackets to the rack may cause the boundary router to fall and sustain damage not covered by the war[...]

1-6 C HAPTER 1: I NSTALLING THE H ARDWARE Cabling the LAN Connector (Models 323, 327, and 52x) This section applies to models 323, 327, and 52x only . Y ou can use only one type of LAN connector on each bridge/router . The following figure shows how to cable a LAN connector . For more information on AUI and 10BASE-T cables, r efer to Chapter 2. Ca[...]

Cabling the Connectors 1-7 Cabling the Serial Connectors The serial connectors provide the following options: ■ The UNIVERSAL connector can be converted to a V .35, V .36, X.21, RS-449, or RS-232 connector . ■ All serial connectors can function in either DTE or DCE-like mode, which allows you to connect a serial connector to either a CSU/DSU de[...]

1-8 C HAPTER 1: I NSTALLING THE H ARDWARE The following figures show how to cable the serial connectors. Models 32x (DTE mode) Models 32x (DCE-like mode) SERIAL UNIVERSAL (B) V.35 (A) RS-232 (C) B Link Active Fault C SYSTEM SuperStack II NETBuilder Status Run Fwd Power /Fault Load Test Console A RS-232 DCE cable V.35 DCE cable V.35 adapter X.21 ad[...]

Cabling the Connectors 1-9 Models 52x (DTE mode) Models 52x (DCE-like mode) V.35 adapter X.21 adapter RS-449/V.36 DCE or RS-232 DCE cables S/T B1 Link Line Act Line Error Connect Fault ISDN SERIAL UNIVERSAL (B) RS-232 (C) B2 B Link Active Fault C RS-232 DCE cable IBM cluster controller V.35 direct connect RS-449/V.36 direct connect or RS-232 direct[...]

1-10 C HAPTER 1: I NSTALLING THE H ARDWARE Attaching a Redundant Power System Y ou can attach your SuperStack II bridge/r outer to a SuperStack II Redundant Power System (RPS). Y ou will need to or der the connecting cable (part number 3C8101) from 3Com. The following figur e shows where to attach this cable. For full power supply redundancy , att[...]

Connecting a PC, Terminal, or Modem 1-11 Connecting a PC, T erminal, or Modem Connect a PC running a terminal emulation program, a terminal, or a modem to the Console port on the SuperStack II bridge/router to configure the bridge/r outer software and review startup and system operation messages. T o connect a PC, terminal, or modem to the DPE mod[...]

1-12 C HAPTER 1: I NSTALLING THE H ARDWARE Shutting Down If your SuperStack II system is not connected to an RPS, tur n off the power by pressing the of f (0) side of the power switch on the back panel. If your system is connected to an RPS, turn off the power by unplugging the RPS cable from the system and then pr essing the off (0) side of the po[...]

2 O VERVIEW This chapter provides an overview of the SuperStack II NETBuilder bridge/router , including information on: ■ Model features ■ Chassis panels ■ LEDs ■ DIP switches ■ Hardwar e interrupt switch ■ Connectors and cables ■ Physical specifications Model Featur es T able 2-1 lists each SuperStack II NETBuilder model along with [...]

2-2 C HAPTER 2: O VERVIEW Figure 2-1 Chassis Front Panels LAN 16Mb Active Fault UTP STP SERIAL UNIVERSAL (B) V.35 (A) RS-232 (C) B Link Active Fault C SYSTEM SuperStack II NETBuilder Status Run Fwd Power /Fault Load Test Console A Model 32x Model 52x STP connector Console connector UNIVERSAL connector RS-232 connector V.35 connector 16Mb Active Fau[...]

LEDs 2-3 Figure 2-2 Chassis Back Panel LEDs See “LED Meanings” on page 4-3 for a complete description of the SuperStack II bridge/router LEDs. Har dwar e Interrupt Switch The hardwar e interrupt switch is located on the left side of the bridge/router (when facing the fr ont panel). It is recessed into an opening near the DIP switches. Press the[...]

2-4 C HAPTER 2: O VERVIEW PC Cable Figure 2-3 shows the pinouts for a 9-pin female to 9-pin female PC cable. A null modem-type cable may be used. Figure 2-3 9-pin to 9-pin PC Cable (Null Modem-T ype) 5 4 3 2 1 9 8 7 6 5 4 3 2 1 9 8 7 6 Name Abbr Pin Pin Abbr Name 9-pin female connector 9-pin female connector 2 3 1 8 7 5 4 6 3 2 7 8 1 5 6 4 TxD RxD [...]

Connectors and Cables 2-5 T erminal Cable Figure 2-4 shows the pinouts for a 9-pin female to 25-pin terminal cable. A null modem-type cable may be used. Figure 2-4 9-pin to 25-pin T erminal Cable (Null Modem-T ype) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 5 4 3 2 1 9 8 7 6 Name Abbr Pin Pin Abbr Name 25-pin male or female c[...]

2-6 C HAPTER 2: O VERVIEW Modem Cable Figure 2-5 shows the pinouts for a 9-pin female to 25-pin male modem cable. A straight-through-type cable may be used. Figure 2-5 9-pin to 25-pin Modem Cable (Straight-Thr ough-T ype) LAN Connectors and Cables The bridge/router has two token ring connectors. Only one connector can be used at one time. UTP Conne[...]

Connectors and Cables 2-7 STP Connector and Cable The following figure shows the pinouts of the STP connector (DB-9). The connector bodies connect the cable shield to chassis ground. T able 2-2 lists cable types, multistation access units (MAUs), and emissions classes compatible with the STP connector . * Shielding of all cable types should be ter[...]

2-8 C HAPTER 2: O VERVIEW Auxiliary Power . Auxiliary +5 volt power is available on the STP connector for specialty powered MAUs, power ed port expanders, or signal conversion devices such as token ring STP-to-fiber optic transceivers. T o use the auxiliary power pins, follow the guidelines in T able 2-4. 3Com does not guarantee compatibility with[...]

Connectors and Cables 2-9 Serial Cables The following cables can be used with the serial port connectors. V .35 to V .35 DCE Cable (32x) This straight-through cable connects the V .35 port on a bridge/router to a standard V .35 DCE device. Figure 2-6 V .35 Straight-Through Cable 3Com does not sell this cable. B F L R V Z DD JJ NN D J N T X BB FF LL[...]

2-10 C HAPTER 2: O VERVIEW V .35 to V .35 Direct Connect Cable (32x) This cable connects a V .35 port of the bridge/router to a V .35 port of an SNA legacy device. Figure 2-7 V .35 to V .35 Direct-Connect Cable 3Com does not sell this cable. B F L R V Z DD JJ NN D J N T X BB FF LL C H M S W A EE KK A E K P U Y CC HH MM B F L R V Z DD JJ NN D J N T [...]

Connectors and Cables 2-11 UNIVERSAL to V .35 Adapter Cable T o connect a SuperStack II bridge/router to a V .35 DCE device, cable the UNIVERSAL connector using a V .35 adapter cable. Figure 2-8 shows the pin assignments of the V .35 adapter cable. When constructing your own V .35 adapter cables, the required cable type is equivalent to Belden part[...]

2-12 C HAPTER 2: O VERVIEW UNIVERSAL to V .35 Direct Connect Cable This cable connects a UNIVERSAL port on the bridge/router to the V .35 port on an SNA legacy device. Figure 2-9 UNIVERSAL to V .35 Direct Connect Cable Y ou can or der this cable from 3Com (part number 3C8135). B F L R V Z DD JJ NN D J N T X BB FF LL C H M S W A EE KK A E K P U Y CC[...]

Connectors and Cables 2-13 UNIVERSAL to RS-449/V .36 DCE Cable T o connect a SuperStack II bridge/router to a V .36 DCE device, cable the UNIVERSAL connector using a V .36 adapter cable. Figure 2-10 shows the pin assignments of the V .36 adapter cable. When constructing your own V .36 adapter cables, the required cable type is equivalent to Belden [...]

2-14 C HAPTER 2: O VERVIEW UNIVERSAL to RS-449/V .36 Direct Connect Cable This cable connects the UNIVERSAL connector on the bridge/router to the RS-449/V .36 port of an SNA legacy device. Figure 2-11 UNIVERSAL to RS-449/V .36 Direct-Connect Cable 3Com does not sell this cable. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27[...]

Connectors and Cables 2-15 UNIVERSAL to RS-232 DCE Cable This cable connects the UNIVERSAL port on a SuperStack II NETBuilder bridge/router to an RS-232 interface on a DCE device. Figure 2-12 UNIVERSAL to RS-232 DCE Cable Y ou can or der this cable from 3Com (part number 3C8023). 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Shi[...]

2-16 C HAPTER 2: O VERVIEW UNIVERSAL to RS-232 Direct Connect Cable This cable connects the UNIVERSAL port on the bridge/router to the RS-232 port on an SNA legacy device. Figure 2-13 UNIVERSAL to RS-232 Direct-Connect Cable Y ou can or der this cable from 3Com (part number 3C8123). 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 [...]

Connectors and Cables 2-17 RS-232 to RS-232 DCE Cable This straight-through cable connects the RS-232 port on a SuperStack II bridge/router to a standar d RS-232 DCE device. Figure 2-14 shows the pin assignments of the RS-232 cable. Figure 2-14 RS-232 Straight-Through Cable 3Com does not sell this cable. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18[...]

2-18 C HAPTER 2: O VERVIEW RS-232 to RS-232 Direct Connect Cable This cable connects the RS-232 port on the bridge/router to an RS-232 port on an SNA legacy device. Figure 2-15 RS-232 to RS-232 Direct-Connect Cable Y ou can or der this cable from 3Com (part number 3C8132). 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 1 2 3 4 5 [...]

Connectors and Cables 2-19 UNIVERSAL to X.21 Adapter Cable If you want to connect any of the SuperStack II bridge/routers documented in this guide to an X.21 DCE device, cable the connector marked UNIVERSAL using an X.21 adapter cable. Figure 2-16 shows the pin assignments of the X.21 adapter cable. Figure 2-16 UNIVERSAL to X.21 Adapter Cable Abbr [...]

2-20 C HAPTER 2: O VERVIEW When constructing your own X.21 adapter cables, the required cable type is equivalent to Belden part number 9839. Cable length is limited to CCITT standard V .11 Appendix I.2. Y ou can or der the X.21 adapter cable from 3Com (part number 3C8021). X.21 European Connector Compliances. For installations where compliance to t[...]

Physical Specifications 2-21 Physical Specifications T able 2-7 provides the environmental r equirements of model 32x and 52x bridge/routers. T able 2-7 Environmental Requir ements for Model 32x and 52x Bridge/Routers Parameter Minimum Requirement Maximum Requirement T emperatur e Operating 5 ° C 40 ° C Nonoperating -40 ° C 75 ° C Altitude Oper[...]

2-22 C HAPTER 2: O VERVIEW SS2TRHWBook Page 22 Monday, May 5, 1997 3:11 PM[...]

3 U PGRADING M EMORY The following memory upgrades are available fr om 3Com for your bridge/router: ■ 4 MB (3C8104) flash memory ■ 4 MB DRAM (3C8040) Complete the following sections to install flash memory or DRAM in your SuperStack II bridge/router . CAUTION: If you install the flash memory upgrade and then remove it from your system after [...]

3-2 C HAPTER 3: U PGRADING M EMORY CAUTION: Make sure you do not accidentally alter the dip switch settings when you remove the cover . Installing Memory T o install the flash memory and/or DRAM SIMM, follow these steps: 1 W ith the chips facing toward the back of the bridge/r outer , place the silver connector edge of the SIMM into the appropriat[...]

Reinstalling the Cover 3-3 Reinstalling the Cover 1 Reinstall the cover on the SuperStack II bridge/router and r eattach it to the chassis with the two screws. 2 Place the upgrade sticker included in your kit on the chassis, as shown. If you have both the flash memory and the DRAM memory upgrade kits, place one sticker from each kit as shown. 3 Pl[...]

3-4 C HAPTER 3: U PGRADING M EMORY SS2TRHWBook Page 4 Monday, May 5, 1997 3:11 PM[...]

4 T ROUBLESHOOTING This chapter describes troubleshooting using the LEDs on the fr ont panel of the system. If the Power/Fault LED appears yellow at any time during the startup process, the bridge/r outer has encountered a problem during system test or system software load. If the Power/Fault LED appears yellow , check the other LEDs as shown in th[...]

4-2 C HAPTER 4: T ROUBLESHOOTING T roubleshooting During the T est Phase When a problem occurs during the test phase, the Status LEDs light in a particular pattern. T able 4-1 shows the Status LED patter n, the problem associated with that pattern, and the action to take. T roubleshooting During the Load Phase When a problem occurs during the load [...]

LED Meanings 4-3 LED Meanings T able 4-3 provides the meanings for the lit LEDs on a SuperStack II bridge/router . On On On On On Yellow Write to Flash File System failed. Call your network supplier for assistance. T able 4-2 System Software Load Err ors (continued) Status LEDs 1 2 3 4 Load LED Power/Fault LED Meaning and Action T able 4-3 LED Mean[...]

4-4 C HAPTER 4: T ROUBLESHOOTING T roubleshooting the T oken Ring Connection This section is not applicable to model 320. T able 4-4 summarizes problems that can occur with a token ring connection and what action you can take. T able 4-4 T roubleshooting the T oken Ring Connection (Models 327 and 527 only) Symptom Cause and Action The LAN LEDs are [...]

Troubleshooting the Token Ring Connection 4-5 Path 1 is up, but the system does not appear to be communicating with other network devices. The system may have attempted to enter the token ring at the wrong speed. Check the setting of the ring speed for path 1 (SHow !1 -PATH BAud). Make sure that the setting of this parameter matches the speed of th[...]

4-6 C HAPTER 4: T ROUBLESHOOTING If you experience a problem or r eceive an error message that is not documented in T able 4-4, contact your network supplier . The MAC address of the system does not appear on the token ring network. The MAC address on the network is in noncanonical format. The MAC address encoded on the EEPROM and printed on the la[...]

A P ROVISIONING Y OUR ISDN L INE This appendix provides North American (U.S. and Canada) and German provisioning information for the SuperStack II NETBuilder bridge/routers and boundary r outers using an Integrated Services Digital Network (ISDN) line with a basic rate interface (BRI). If your ISDN line is not provisioned correctly , you will not b[...]

A-2 A PPENDIX A: P ROVISIONING Y OUR ISDN L INE 6 If desired, ask for an NT1 to connect your SuperStack II bridge/r outer to the ISDN line. (Y ou can also pur chase an NT1 from a r eseller .) 7 Fill out the ISDN Information Sheet: Ask for the following information: ■ ISDN Switch T ype. Ask the repr esentative which ISDN switch type your line uses[...]

North American Switch Provisioning Tables A-3 Y our telephone company gives you the phone number and SPID number after it installs your line. If your telephone company has the IOC for a SuperStack II bridge/router or boundary router , you do not need to complete step 8. 8 Provide pr ovisioning information that corresponds to your ISDN switch using [...]

A-4 A PPENDIX A: P ROVISIONING Y OUR ISDN L INE A T&T 5ESS Switch T o order ISDN service for an A T&T 5ESS switch, provide the telephone company with the information in T able A-1. T able A-1 Ordering ISDN Service for an A T&T 5ESS Switch Required Information Specification Line type National ISDN 1 line Line code 2B1Q (2B+D) Interface t[...]

North American Switch Provisioning Tables A-5 A T&T 5ESS Custom Switch T o order ISDN service for an A T&T 5ESS custom switch, provide the telephone company with the information in T able A-2. A point-to-point configuration on a SuperStack II bridge/router or boundary router is selected by setting the SPIDn1 and SPIDn2 parameters to none. [...]

A-6 A PPENDIX A: P ROVISIONING Y OUR ISDN L INE DMS 100 and National ISDN T o order ISDN service for a DMS 100 or National ISDN switch, pr ovide the telephone company with the information in T able A-3. T able A-3 Ordering ISDN Service for a DMS 100 Switch Required Information Specification Line type DMS 100 or National ISDN 1line (in North America[...]

SPIDs A-7 Siemens EWSD Switch T o order ISDN service for a Siemens EWSD switch, pr ovide the phone company with the information in T able A-3. SPIDs When you r equest services, you may also need the following information about SPIDs and other service attributes: ■ Request multipoint, initializing terminal service; the maximum number of terminals [...]

A-8 A PPENDIX A: P ROVISIONING Y OUR ISDN L INE ■ The SPID numbers must be unique. The 2-digit TID can be any number from 0 to 62. The TID has no ef fect on the operation of the SuperStack II bridge/router , but it is a necessary part of the SPID that the bridge/router uses to gain access to the ISDN network. ■ If you request ISDN service fr om[...]

Ordering German ISDN BRI Services A-9 Not all NT1s provide phantom power; for example, the AMI NT1 fr om A T&T does not. If you connect the SuperStack II bridge/router to an NT1 that does not provide phantom power , you must tur n of f phantom power detection before you can dial successfully . T ur n off phantom power detection by setting -P A [...]

A-10 A PPENDIX A: P ROVISIONING Y OUR ISDN L INE SS2TRHWBook Page 10 Monday, May 5, 1997 3:11 PM[...]

B T ECHNICAL S UPPORT 3Com provides easy access to technical support information thr ough a variety of services. This appendix describes these services. Information contained in this appendix is correct at time of publication. For the very latest, we recommend that you access 3Com Corporation’ s World Wide Web site as described below . Online T e[...]

B-2 A PPENDIX B: T ECHNICAL S UPPORT Access by Analog Modem T o reach the service by modem, set your modem to 8 data bits, no parity , and 1 stop bit. Call the telephone number nearest you: Access by Digital Modem ISDN users can dial in to 3ComBBS using a digital modem for fast access up to 56 Kbps. T o access 3ComBBS using ISDN, use the following [...]

Support from Your Network Supplier B-3 Local access numbers are available within the following countries: 3ComForum on CompuServe Online Service 3ComForum is a CompuServe-based service containing patches, software, drivers, and technical articles about all 3Com pr oducts, as well as a messaging section for peer support. T o use 3ComForum, you need [...]

B-4 A PPENDIX B: T ECHNICAL S UPPORT Support fr om 3Com If you are unable to r eceive support from your network supplier , technical support contracts are available fr om 3Com. Contact your local 3Com sales office to find your authorized service provider using one of these numbers: Regional Sales Office Telephone Number 3Com Corporation P.O. Box [...]

Returning Products for Repair B-5 Returning Products for Repair Befor e you send a product dir ectly to 3Com for repair , you must first obtain a Return Materials Authorization (RMA) number . Products sent to 3Com without RMA numbers will be returned to the sender unopened, at the sender’ s expense. T o obtain an RMA number , call or fax: 04/22/[...]

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I NDEX Numerics 3Com Bulletin Board Service (3ComBBS) B-1 3Com sales offices B-4 3Com URL B-1 3ComFacts B-2 3ComForum B-3 A A T&T 5ESS switch custom, ordering A-5 standard, or dering A-4 auxiliary power 2-8 B back panel 2-3 bulletin board service B-1 C cables console 2-3 ISDN 2-20 modem 2-6 PC 2-4 RS-232 to RS-232 DCE 2-17 RS-232 to RS-232 dir[...]

2 I NDEX I IBM cluster controller 1-7 installing in a rack 1-4 on a tabletop 1-3 stacking with brackets 1-4 ISDN acquiring telecommunication services A-9 cable 2-20 German BRI services A-9 information sheet A-2 North American BRI services A-1 phantom power A-9 provisioning tables A-3 SPIDs A-7 L LEDs meanings 4-3 normal 4-1 loading software, tr oub[...]

I NDEX 3 token ring connection, troubleshooting 4-4 troubleshooting deleted image files 4-2 during test phase 4-2 LED meanings 4-3 load errors 4-2 load phase 4-2 token ring connection 4-4 U upgrading memory 3-1 URL B-1 UTP cable 2-6 connector 2-6 V V .35 cable adapter 2-11 DCE straight-through 2-9 direct connect 2-10 V .36 cable DCE 2-13 direct co[...]

4 I NDEX SS2TRHWBook Page 4 Monday, May 5, 1997 3:11 PM[...]

3Com Corporation L IMITED W ARRANTY H ARDWARE 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: If a product does not operate as warranted above during the applicable warranty period[...]

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 MODIFY, OR ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE, OR BY [...]