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SEH100TX-22

100BASE-TSTACKABLE HUB

USER’S GUIDE

®

Only qualified personnel should perform installation procedures.

NOTICE

Cabletron Systems reserves the right to make changes in specifications and other information contained in this document without prior notice. The reader should in all cases consult Cabletron Systems to determine whether any such changes have been made.

The hardware, firmware, or software described in this manual is subject to change without notice.

IN NO EVENT SHALL CABLETRON SYSTEMS BE LIABLE FOR ANY INCIDENTAL, INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING BUT NOT LIMITED TO LOST PROFITS) ARISING OUT OF OR RELATED TO THIS MANUAL OR THE INFORMATION CONTAINED IN IT, EVEN IF CABLETRON SYSTEMS HAS BEEN ADVISED OF, KNOWN, OR SHOULD HAVE KNOWN, THE POSSIBILITY OF SUCH DAMAGES.

Copyright 1996 by Cabletron Systems, Inc., P.O. Box 5005, Rochester, NH 03866-5005All Rights Reserved

Printed in the United States of America

Order Number: 9031510-02December 1996

SPECTRUM,LANVIEW andBRIM are registered trademarks andElement Manager,EPIM,EPIM-100FX,EPIM-100TX,EPIM-100FMB,HubSTACK,MicroMMAC,SEH, andSEHI are trademarks of Cabletron Systems, Inc.

All other product names mentioned in this manual may be trademarks or registered trademarks of their respective companies.

FCC NOTICE

This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

NOTE: 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. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment uses, generates, and can radiate radio frequency energy and if not installed in accordance with the operator’s manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause interference in which case the user will be required to correct the interference at his own expense.

WARNING: Changes or modifications made to this device which are not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

Printed on

Recycled Paper

SEH100TX User’s Guide

i

Notice

DOC NOTICE

This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications.

Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de la class A prescrites dans le Règlement sur le brouillage radioélectrique édicté par le ministère des Communications du Canada.

VCCI NOTICE

This equipment is in the 1st Class Category (information equipment to be used in commercial and/or industrial areas) and conforms to the standards set by the Voluntary Control Council for Interference by Information Technology Equipment (VCCI) aimed at preventing radio interference in commercial and/or industrial areas.

Consequently, when used in a residential area or in an adjacent area thereto, radio interference may be caused to radios and TV receivers, etc.

Read the instructions for correct handling.

CABLETRON SYSTEMS, INC. PROGRAM LICENSE AGREEMENT

IMPORTANT: Before utilizing this product, carefully read this License Agreement.

This document is an agreement between you, the end user, and Cabletron Systems, Inc. (“Cabletron”) that sets forth your rights and obligations with respect to the Cabletron software program (the “Program”) contained in this package. The Program may be contained in firmware, chips or other media. BY UTILIZING THE ENCLOSED PRODUCT, YOU ARE AGREEING TO BECOME BOUND BY THE TERMS OF THIS AGREEMENT, WHICH INCLUDES THE LICENSE AND THE LIMITATION OF WARRANTY AND DISCLAIMER OF LIABILITY. IF YOU DO NOT AGREE TO THE TERMS OF THIS AGREEMENT, PROMPTLY RETURN THE UNUSED PRODUCT TO THE PLACE OF PURCHASE FOR A FULL REFUND.

ii

SEH100TX User’s Guide

Notice

CABLETRON SOFTWARE PROGRAM LICENSE

1.LICENSE. You have the right to use only the one (1) copy of the Program provided in this package subject to the terms and conditions of this License Agreement.

You may not copy, reproduce or transmit any part of the Program except as permitted by the Copyright Act of the United States or as authorized in writing by Cabletron.

2.OTHER RESTRICTIONS. You may not reverse engineer, decompile, or disassemble the Program.

3.APPLICABLE LAW. This License Agreement shall be interpreted and governed under the laws and in the state and federal courts of New Hampshire. You accept the personal jurisdiction and venue of the New Hampshire courts.

EXCLUSION OF WARRANTY AND DISCLAIMER OF LIABILITY

1.EXCLUSION OF WARRANTY. Except as may be specifically provided by Cabletron in writing, Cabletron makes no warranty, expressed or implied, concerning the Program (including its documentation and media).

CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED TO YOU BY CABLETRON IN WRITING, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, WITH RESPECT TO THE PROGRAM, THE ACCOMPANYING WRITTEN MATERIALS, AND ANY ACCOMPANYING HARDWARE.

2.NO LIABILITY FOR CONSEQUENTIAL DAMAGES. IN NO EVENT SHALL CABLETRON OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS, PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, SPECIAL, INCIDENTAL, CONSEQUENTIAL, OR RELIANCE DAMAGES, OR OTHER LOSS) ARISING OUT OF THE USE OR INABILITY TO USE THIS CABLETRON PRODUCT, EVEN IF CABLETRON HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. BECAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, OR ON THE DURATION OR LIMITATION OF IMPLIED WARRANTIES, IN SOME INSTANCES THE ABOVE LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO YOU.

UNITED STATES GOVERNMENT RESTRICTED RIGHTS

The enclosed product (a) was developed solely at private expense; (b) contains “restricted computer software” submitted with restricted rights in accordance with Section 52227-19(a) through (d) of the Commercial Computer Software - Restricted Rights Clause and its successors, and (c) in all respects is proprietary data belonging to Cabletron and/or its suppliers.

For Department of Defense units, the product is licensed with “Restricted Rights” as defined in the DoD Supplement to the Federal Acquisition Regulations, Section 52.227-7013(c) (1) (ii) and its successors, and use, duplication, disclosure by the Government is subject to restrictions as set forth in subparagraph (c) (1) (ii) of the Rights in Technical Data and Computer Software clause at252.227-7013.Cabletron Systems, Inc., 35 Industrial Way, Rochester, New Hampshire03867-0505.

SEH100TX User’s Guide

iii

Notice

DECLARATION OF CONFORMITY

Application of Council Directive(s): 89/336/EEC

73/23/EEC

Manufacturer’s Name: Cabletron Systems, Inc.

Manufacturer’s Address: 35 Industrial Way

PO Box 5005

Rochester, NH 03867

European Representative Name: Mr. J. Solari

European Representative Address: Cabletron Systems Limited

Nexus House, Newbury Business Park

London Road, Newbury

Berkshire RG13 2PZ, England

Conformance to Directive(s)/Product Standards: EC Directive 89/336/EEC

EC Directive 73/23/EEC EN 55022

EN 50082-1EN 60950

Equipment Type/Environment: Networking Equipment, for use in a

Commercial or Light Industrial Environment.

We the undersigned, hereby declare, under our sole responsibility, that the equipment packaged with this notice conforms to the above directives.

Manufacturer

Legal Representative in Europe

Mr. Ronald Fotino

Mr. J. Solari

___________________________________

___________________________________

Full Name

Full Name

Principal Compliance Engineer

Managing Director - E.M.E.A.

___________________________________

___________________________________

Title

Title

Rochester, NH, USA

Newbury, Berkshire, England

___________________________________

___________________________________

Location

Location

iv

SEH100TX User’s Guide

CONTENTS

CHAPTER 1

INTRODUCTION

 

1.1

Using This Manual.......................................................................

1-1

1.2

Document Conventions ...............................................................

1-2

1.3

Getting Help.................................................................................

1-3

1.4

Related Manuals..........................................................................

1-4

CHAPTER 2 SEH FEATURES AND OPTIONS

 

2.1

SEH Overview .............................................................................

2-2

2.2

SEH Features ..............................................................................

2-2

2.3

Stackable Capabilities .................................................................

2-3

2.4

Rack Mounting Capabilities .........................................................

2-3

2.5

Optional EPIMs............................................................................

2-4

CHAPTER 3

INSTALLATION REQUIREMENTS

 

 

 

AND SPECIFICATIONS

 

3.1

Cable Specifications ....................................................................

3-1

 

3.1.1 HubSTACK Interconnect Cable Requirements...............

3-1

 

3.1.2

UTP Cable Specifications ...............................................

3-2

 

3.1.3 Multimode Fiber Optic Cable Specifications ...................

3-3

3.2

Network Cable Lengths ...............................................................

3-4

3.3

Network Port Specifications.........................................................

3-5

3.4

Operating Specifications..............................................................

3-6

 

3.4.1

Power Supply Requirements ..........................................

3-6

 

3.4.2

Environmental Requirements .........................................

3-6

3.5

Agency Approvals........................................................................

3-6

 

3.5.1

Safety..............................................................................

3-6

 

3.5.2

Emission .........................................................................

3-6

 

3.5.3

Immunity .........................................................................

3-7

3.6

Physical Specifications ................................................................

3-7

SEH100TX User’s Guide

v

Contents

CHAPTER 4

INSTALLATION

 

4.1

Unpacking the SEH......................................................................

4-1

4.2

Tabletop or Shelf Installation .......................................................

4-2

4.3

Rackmount Installation.................................................................

4-3

4.4

Powering Up and Stacking the SEH ............................................

4-5

 

4.4.1 Stacking SEH Hubs with an SEHI ...................................

4-6

 

4.4.2 Stacking Unmanaged SEH Hubs Together.....................

4-8

4.5

Installing an EPIM ........................................................................

4-8

CHAPTER 5 CONNECTING TO THE NETWORK

 

5.1

Connecting the SEH100TX-22 to the Network ............................

5-1

 

5.1.1 Connecting to Network Ports...........................................

5-1

 

5.1.2 Connecting to an EPIM-100TX........................................

5-2

 

5.1.3 nnecting an EPIM-100FX or EPIM-100FMB ...................

5-4

5.2

Testing the Installation .................................................................

5-5

CHAPTER 6

TROUBLESHOOTING

 

6.1

Installation Test............................................................................

6-1

6.2

Using LANVIEW...........................................................................

6-2

APPENDIX A

EPIM INFORMATION

 

A.1

EPIM Specifications ....................................................................

A-1

 

A.1.1

EPIM-100TX ...................................................................

A-1

 

A.1.2

EPIM-100FX ...................................................................

A-2

 

A.1.3

EPIM-100FMB ................................................................

A-3

INDEX

vi

SEH100TX User’s Guide

CHAPTER 1

INTRODUCTION

Welcome to the Cabletron Systems SEH100TX-22 100BASE-T Stackable Hub User’s Guide. This manual provides installation instructions, troubleshooting and reference information for theSEH100TX-22.

NOTE

The terms SEH (Stackable Ethernet Hub) and SEHI (Stackable

Ethernet Hub with Intelligence) are used throughout this

 

manual when referring to the SEH100TX-22and the

 

SEHI100TX-22,respectively.

1.1USING THIS MANUAL

Read through this manual to gain an understanding of the features and capabilities of the SEH. A general knowledge of Ethernet and IEEE 802.3u type data communications networks and their physical layer components is helpful when installing the SEH.

Chapter 1, Introduction, outlines the contents and describes the objectives and conventions of this manual. This chapter also provides information about how to get help and concludes with a list of related manuals.

Chapter 2, SEH Features and Options, briefly describes SEH features and provides information about available options.

Chapter 3, Installation Requirements and Specifications, provides installation requirements, network guidelines, and SEH specifications.

Chapter 4, Installation, contains instructions for installing the SEH as a stackable or standalone hub.

Chapter 5, Connecting to the Network, explains how to connect the SEH to the network using the various media types.

Chapter 6, Troubleshooting, describes how to use the LANVIEW LEDs to troubleshoot network problems.

Appendix A, EPIM Information, provides specifications, cabling information, and switch settings for the Ethernet Port Interface Modules.

SEH100TX User’s Guide

1-1

Chapter 1: Introduction

1.2DOCUMENT CONVENTIONS

The following conventions are used throughout this document:

NOTE

Note symbol. Calls the reader’s attention to any item of

information that may be of special importance.

Tip symbol. Conveys helpful hints concerning procedures orTIP actions.

Caution symbol. Contains information essential to avoid

!damage to the equipment.

CAUTION

Electrical Hazard Warning symbol. Warns against an action that could result in personal injury or death due to an electrical hazard.

1-2

SEH100TX User’s Guide

Getting Help

1.3GETTING HELP

If you need additional support related to this device, or if you have any questions, comments, or suggestions concerning this manual, contact Cabletron Systems Technical Support:

Phone

(603) 332-9400

 

Monday – Friday; 8 A.M. – 8P.M. Eastern Time

 

 

CompuServe

GO CTRON from any ! prompt

 

 

Internet mail

support@ctron.com

 

 

FTP

ctron.com (134.141.197.25)

Login

anonymous

Password

your email address

 

 

BBS

(603) 335-3358

Modem setting

8N1: 8 data bits, 1 stop bit, No parity

 

 

For additional information about Cabletron Systems products, visit our World Wide Web site: http://www.cabletron.com/

Before calling Cabletron Systems Technical Support, have the following information ready:

A description of the failure

A description of any action(s) already taken to resolve the problem (e.g., changing mode switches, rebooting the unit, etc.)

A description of your network environment (layout, cable type, etc.)

Network load and frame size at the time of trouble (if known)

The serial and revision numbers of all Cabletron Systems products in the network

The device history (i.e., have you returned the device before, is this a recurring problem, etc.)

Any previous Return Material Authorization (RMA) numbers

SEH100TX User’s Guide

1-3

Chapter 1: Introduction

1.4RELATED MANUALS

Use the Cabletron Systems SEHI100TX-22100BASE-TIntelligent Stackable Hub User’s Guideto supplement the procedures and other technical data provided in this manual. The procedures contained in the

SEHI100TX-22100BASE-TIntelligent Stackable Hub User’s Guideare referenced where appropriate, but not repeated in this manual.

1-4

SEH100TX User’s Guide

CHAPTER 2

SEH FEATURES AND OPTIONS

This chapter provides an overview of the SEH (Figure 2-1)and contains sections detailing the features and available options.

NOTE

The abbreviations SEH (Stackable Ethernet Hub) and SEHI

(Stackable Ethernet Hub with Intelligence) are used throughout

 

this manual when referring to the SEH100TX-22and the

 

SEHI100TX-22,respectively.

 

EPIM 2

HubSTACK 100BASE-TXHUBWITH LANVIEW®

SEH100TX-22

 

RCV

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LNK

 

 

 

 

 

 

E

 

 

 

 

 

 

 

 

 

 

 

 

22 21 20 19 18 17 16 15 14 13 12

2

22X

21X

20X

19X

18X

17X

16X

15X

14X

13X

12X

 

 

 

 

 

 

 

 

 

PWR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MGMT

RCV

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CLN

LNK

 

 

 

 

 

 

E

 

 

 

 

 

 

 

 

 

 

 

 

11 10 9 8 7

6

5

4

3

2

1

1

11X

10X

9X

8X

7X

6X

5X

4X

3X

2X

1X

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EPIM 1

Port Status LEDs

 

Network Ports 1-22

 

System LEDs

 

EPIM Slots

SEH100TX-22 100BASE-THUB WITH LANVIEW®

 

 

OUT

 

SEH100TX INTERCONNECT

SN

IN

 

1510 01

Power Supply

Interconnect Bus "OUT" Port

Interconnect Bus "IN" Port

REAR VIEW

Figure 2-1Front and Rear Views of theSEH100TX-22

SEH100TX User’s Guide

2-1

Chapter 2: SEH Features and Options

2.1SEH OVERVIEW

The SEH100TX-22is a repeating hub providing 22 RJ45 ports and two Ethernet Port Interface Module (EPIM) ports on the front panel for network connections. The SEH has two rear panel Interconnect Bus ports for stackable connections. The front panel EPIM ports support theEPIM-100TX,EPIM-100FX,and theEPIM-100FMB.TheSEH100TX-22is designed to be managed by the Cabletron Systems intelligent stackable hub, theSEHI100TX-22.

The SEH100TX-22operates in a100BASE-TEthernet

!network. This product will NOT operate in a 10BASE-T

CAUTION

environment. Connect the SEH100TX-22only to similar

 

 

100BASE-Tproducts such as theSEHI100TX-22.

 

The SEH100TX-22supports theEPIM-100TX,EPIM-100FX,

 

and the EPIM-100FMB.No other Cabletron Systems EPIMs

 

operate in this device.

2.2SEH FEATURES

Repeater Functionality

The SEH fully conforms to the IEEE 802.3u Repeater specifications. The SEH transmits retimed data packets, regenerates the preamble, extends fragments, and arbitrates collisions.

The SEH100TX-22meets IEEE 802.3u Repeater Class I standards. Class I standards allow one repeater between any two Data Terminal Equipment (DTE) devices within a single collision domain (network).

The SEH automatically partitions problem segments, and reconnects repaired segments to the network. This feature minimizes the impact on network operation resulting from a problem on one segment by isolating the problem segment. Only devices on the problem segment are affected. When the problem is solved, the SEH automatically reconnects the isolated segment to the network.

Polarity Detection and Correction

Each twisted pair port on the SEH incorporates a Polarity Detection and Correction feature which allows the SEH to pass data regardless of the polarity of the receive link on the twisted pair segment.

2-2

SEH100TX User’s Guide

Stackable Capabilities

LANVIEW LEDs

Cabletron Systems LANVIEW status monitoring and diagnostics system is a troubleshooting tool that helps in diagnosing power failures, collisions, cable faults, and link problems. The LANVIEW LEDs are conveniently located on the SEH front panel.

2.3STACKABLE CAPABILITIES

The SEH100TX-22is anon-intelligenthub designed to be managed by the Cabletron SystemsSEHI100TX-22intelligent hub. The design of the SEH allows the stacking of five SEH hubs in an unmanaged configuration or up to four Cabletron Systems SEHnon-intelligenthubs with one SEHI. The SEHI is placed at the bottom of the stack. It manages all SEH hubs in the stack and provides full packet and error statistics for the entire stack, individual devices, or individual ports.

SEH non-intelligenthubs may be stacked together or with one SEHI using Cabletron Systems HubSTACK Interconnect cables provided with the SEH. Stackable configurations make it possible to maintain only one IEEE repeater hop while providing up to 120 ports. The design allows hubs to be added or removed from a stack without having to power down the entire stack.

2.4RACK MOUNTING CAPABILITIES

The SEH can be installed in a 19-inchrack. Cabletron Systems provides the necessary brackets and mounting screws for the SEH. Refer toChapter 4, Installation, for complete rack mounting instructions.

SEH100TX User’s Guide

2-3

Chapter 2: SEH Features and Options

2.5OPTIONAL EPIMs

EPIMs are not included with the SEH, but they can be purchased separately from Cabletron Systems.

EPIMs enable the expansion of a network through different types of media. Cabletron Systems offers three optional EPIMs for the SEH100TX-22andSEHI100TX-22as shown inTable 2-1

Table 2-1100BASE-TX/FX/FMBEPIMs

EPIM

Media Type

Connector

 

 

 

 

 

 

EPIM-100TX

Category 5 Unshielded Twisted

RJ45

Pair Cable

 

 

 

 

 

EPIM-100FX

Multimode Fiber Optic Cable

SC

 

 

 

EPIM-100FMBfor

Multimode Fiber Optic Cable

SC

buffered uplinks

 

 

 

 

 

For more details about the EPIMs, refer to Appendix A.

2-4

SEH100TX User’s Guide

CHAPTER 3

INSTALLATION REQUIREMENTS

AND SPECIFICATIONS

This chapter describes cabling requirements, network guidelines, and operating specifications for the SEH100TX-22.

The network must meet the requirements and conditions

!specified in this chapter to obtain satisfactory performance from

CAUTION

this equipment. Failure to follow these guidelines could result in

 

 

poor network performance.

3.1CABLE SPECIFICATIONS

The front panel SEH100TX-22network ports support Category 5 Unshielded Twisted Pair (UTP) cabling. Ethernet Port Interface Modules (EPIMs) expand the network using UTP(EPIM-100TX)or multimode fiber optic(EPIM-100FXorEPIM-100FMB)cabling. For information concerning the two EPIM types, refer toAppendix A. The rear panel Interconnect Bus ports support Cabletron Systems Interconnect cables for stackable applications.

Take care in planning and preparing the network cabling and connections. The quality of the connections and the length of cables are critical factors in determining the reliability of the network. The following sections provide the specifications for each media type.

3.1.1HubSTACK Interconnect Cable Requirements

Connect units in the stack together with the HubSTACK Interconnect cables shipped with the SEH module and available only from Cabletron Systems (P/N 9380209). The cables attach to the SEH100TX-22rear panel bus ports.

The rear panel of the SEH has an Interconnect Bus Out port and an Interconnect Bus In port to stack hubs together. The bus supports five stackable devices. Stack up to five SEH hubs together or stack up to four SEH hubs together with one SEHI100TX-22.

SEH100TX User’s Guide

3-1

Chapter 3: Installation Requirements and Specifications

3.1.2UTP Cable Specifications

The device at the other end of the twisted pair segment must meet IEEE 802.3u 100BASE-Tspecifications. When connecting a100BASE-TXtwisted pair segment to the SEH twisted pair network ports and theEPIM-100TXmodule, the network must meet the following requirements:

Length

The IEEE 802.3u 100BASE-Tstandard requires that100BASE-TXdevices have the ability to transmit over a 100 meter (328 foot) link using Category 5 UTP wire. The cable used must meet the Horizontal requirements and90-meterlength limitations. Patch cable should be used on each end of the Horizontal wire to make connections to punch down blocks, panels, or other connecting devices. The combined lengths of the patch cords must not exceed 10 meters so the total segment length including the patch cords does not exceed 100 meters (328 feet).

Category 5 cables are marked on the cable jacket as Cat 5, Category 5, Level 5, Level V, or an equivalent.

Impedance

UTP cables typically have an impedance of between 85 and 110 ohms.

Jitter

Intersymbol interference and reflections cause jitter in the bit cell timing, resulting in data errors. A 100BASE-TXlink must not generate more than 1.4 ns of jitter. If the cable meets the impedance requirements for a100BASE-TXlink, jitter should not be a concern.

Crosstalk

Crosstalk is caused by signal coupling between the different cable pairs contained within a multi-paircable bundle.100BASE-TXtransceivers are designed so that the user does not need to be concerned about cable crosstalk, provided the cable meets all other requirements.

Noise

Noise is caused by either crosstalk or externally induced impulses. Impulse noise may cause data errors if the impulses occur at very specific times during data transmission. Generally, the user need not be concerned about noise. If noise-relateddata errors are suspected, it may be necessary to either reroute the cable or eliminate the source of the impulse noise.

3-2

SEH100TX User’s Guide

Cable Specifications

Propagation Delay

Propagation delay is the amount of time it takes data to travel from the sending device to the receiving device. Total propagation delay allowed for the network is 256 bit times (2.56 s) in one direction (5.12 s round trip). If the total propagation delay between any two nodes on the network exceeds 2.56 s, then use bridges or other devices to further segment the network.

Temperature

The attenuation of PVC insulated cable varies significantly with temperature. At temperatures greater than 40°C (104°F), Cabletron

Systems recommends the use of plenum-ratedcables to ensure that cable attenuation remains within specification.

3.1.3Multimode Fiber Optic Cable Specifications

The SEH supports the Cabletron Systems EPIM-100FXandEPIM-100FMB.These EPIMs meet IEEE 802.3u standards. When connecting a fiber optic segment to the SEHEPIM-100FXorEPIM-100FMBmodule, the network must meet the following requirements:

Cable Loss

Test the fiber optic cable with a fiber optic attenuation test set adjusted for an 850 nm wavelength. This test verifies that the signal loss in a cable is within an acceptable level. The maximum loss for a multimode fiber optic cable is 11.0 dB.

Fiber Optic Budget and Propagation Delay

Determine the maximum fiber optic cable length by calculating the fiber optic budget delay and total network propagation before fiber optic cable runs are incorporated in any network design.

Fiber optic budget is the combination of the optical loss due to the fiber optic cable, in-linesplices, and fiber optic connectors.

Propagation delay (collision delay) is the amount of time it takes data to travel from the sending device to the receiving device. Total propagation delay allowed for the entire network is 256 bit times (2.56 s) in one direction (5.12 s round trip). If the total propagation delay between any two nodes on the network exceeds 2.56 s, then use bridges or other devices to further segment the network.

SEH100TX User’s Guide

3-3

Chapter 3: Installation Requirements and Specifications

3.2NETWORK CABLE LENGTHS

This section details the maximum network cable lengths specified by the IEEE 802.3u standard for a Class I repeater. As stated previously, the physical size of the network is limited primarily by propagation delay. The round trip delay cannot exceed 512 bit times or 5.12 s.

NOTE

A stack of five SEH hubs or four SEH hubs and one SEHI hub

is equivalent to one repeater.

A 100BASE-Tnetwork might use all UTP links, all fiber links, or a combination of both.Figure 3-1 shows a simplified example of a network with one Class I repeater. Link segments A and B represent the longest links in the network. In this case, if both segment A and segment B are UTP, each segment may be up to 100 meters long for a maximum network length of 200 meters. If segment A is UTP and segment B is fiber optic, the maximum length of the network is 263 meters (with a maximum UTP segment length of 100 meters). If both segments A and B are multimode fiber optic, the maximum length is 274 meters.

If a buffered uplink (EPIM-100FMB)is used, the collision domain is stopped at the EPIM slot. This allows a full length fiber optic link of 400 meters to be used as an uplink while maintaining100-meterUTP and400-meterfiber optic lengths to desktops. So if segment A, shown inFigure 3-1,is UTP and segment B is fiber optic, the maximum length of the network is 500 meters. If both segments are fiber optic, the maximum length is 800 meters.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SEH100TX-22

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DTE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DTE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 3-1Class I Network

3-4

SEH100TX User’s Guide

Network Port Specifications

Table 3-1 summarizes the maximum segment lengths for the type and combination of cables used with a Class I repeater.

The maximum length of an individual UTP segment may be no

!more than 100 meters for proper operation.

CAUTION

 

Table 3-1

Maximum Class I Network Cable Length

 

 

 

 

 

 

 

 

Number

 

 

UTP &

Multimode

UTP &

Fiber

 

 

Optics&

of

 

UTP

Multimode

Fiber

Buffered

 

Buffered

Repeaters

 

 

Fiber Optics

Optics

EPIM

 

 

EPIM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

200 m

263 m

274 m

500 m

800 m

 

 

 

 

 

 

 

3.3NETWORK PORT SPECIFICATIONS

The SEH network ports use shielded RJ45 connectors that support UTP cabling. Figure 3-2 shows the RJ45 pinouts.

1 2 3 4 5 6 7 8

11X 10X 9X

1.

Receive +

5. Not Used

2.

Receive

-

6. Transmit -

3. Transmit

+

7. Not Used

4.

Not Used

 

8. Not Used

09162_02

Figure 3-2RJ45 Network Port Pinouts

SEH100TX User’s Guide

3-5

Chapter 3: Installation Requirements and Specifications

3.4OPERATING SPECIFICATIONS

This section details power supply and environmental requirements.

3.4.1Power Supply Requirements

The SEH has a universal power supply. The input power requirements are listed in Table 3-2.

Table 3-2Power Requirements

Line Input Range

Current

Frequency

 

 

 

 

 

 

100–125Vac

4.0 A

50/60 Hz

 

 

200–250Vac

2.0 A

 

 

 

 

3.4.2Environmental Requirements

The environmental requirements for the SEH are detailed in this section.

Operating Temperature:

5°C to 40°C

(41°F to 104°F)

Storage Temperature:

-30°Cto 73°C

(-22°Fto 164°F)

Operating Humidity:

15% to 95% (non-condensing)

3.5AGENCY APPROVALS

The safety, emission, and immunity approvals for the SEH are detailed in this section.

3.5.1Safety

This unit meets the requirements of UL 1950, CSA C22.2 No. 950, IEC 950, and EN 60950.

3.5.2Emission

This unit is compliant with the requirements of FCC Part 15 Class A, EN 55022 Class A, and VCCI Class I.

3-6

SEH100TX User’s Guide

Physical Specifications

3.5.3Immunity

This unit meets the requirements of EN 50082-1including IEC801-2(ESD), IEC801-3(Radiated Susceptibility), and IEC801-4(EFT/B).

3.6PHYSICAL SPECIFICATIONS

This section details the physical specifications for the SEH.

Dimensions (H x W x D):

2.8 in x 17.0 in x 13.5 in

 

(7.2 cm x 43.6 cm x 34.6 cm)

Weight:

7 lb (3.15 kg)

SEH100TX User’s Guide

3-7

Chapter 3: Installation Requirements and Specifications

3-8

SEH100TX User’s Guide

CHAPTER 4

INSTALLATION

This chapter outlines the procedure for attaching the SEH to the network as a stackable or standalone device. Ensure that the network meets the guidelines and requirements outlined in Chapter 3, Installation Requirements and Specifications, before installing the SEH.

NOTE

A single phase grounded power receptacle that meets the

power supply requirements listed in Chapter 3 must be located

 

within seven feet of the installation.

Failure to follow installation instructions may result in damage to the equipment or electrical shock hazard.

This chapter covers the following topics:

Unpacking the SEH (Section 4.1)

Installing the SEH in a tabletop configuration (Section 4.2)

Rack Mounting the SEH (Section 4.3)

Powering Up and Stacking the SEH (Section 4.4)

Installing Optional EPIMs (Section 4.5)

4.1UNPACKING THE SEH

Unpack the SEH as follows:

1.Remove the shipping material covering the SEH in the shipping box.

2.Carefully remove the SEH from the shipping box and set it aside to prevent damage.

3.Visually inspect the SEH. If there are any signs of damage, contact Cabletron Systems Technical Support immediately. Refer to Section 1.3, Getting Help, for instructions.

SEH100TX User’s Guide

4-1

Chapter 4: Installation

The SEH may be installed on a tabletop or shelf, or in a 19-inchrack, and configured as a standalone or stacked hub.

Go to Section 4.2 to install an SEH on a table or shelf. Go toSection 4.3 to install the SEH in a rack.

4.2TABLETOP OR SHELF INSTALLATION

This section provides guidelines for installation on a tabletop or shelf.

Tabletop and shelf installations must be within reach of the network cabling and meet the requirements listed below:

In a shelf installation, the shelf must be able to support 30 pounds of static weight for each device in the stack.

Maintain a temperature of between 5°C (41°F) and 40°C (104°F) at the installation site with fluctuations of less than 10°C per hour.

The SEH must be located within seven feet of its power source and with an unrestricted free surface area as shown in Figure 4-1.

In order to allow for proper cooling, there must be a two-inch

!clearance on either side and the back of the unit.

CAUTION

C

B

A

HubSTACK 100BASE-TXHUBWITH LANVIEW®

SEH100TX-22

 

RCV

 

 

 

 

 

 

 

 

LNK

 

 

 

 

 

 

E

 

22 21 20 19 18 17 16 15 14 13 12

2

PWR

 

 

 

 

 

 

 

 

MGMT

RCV

 

 

 

 

 

 

E

CLN

LNK

 

 

 

 

 

 

 

11 10 9 8 7

6

5

4

3

2

1

1

EPIM 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

22X

21X

20X

19X

18X

17X

16X

15X

14X

13X

12X

 

 

 

 

 

 

 

 

 

 

 

11X

10X

9X

8X

7X

6X

5X

4X

3X

2X

1X

EPIM 1

A = 15.24 cm (6 in) B = 45.72 cm (18 in) C = 53.34 cm (21 in) D = 213.36 cm (7 ft)

D

1510_13

Figure 4-1Tabletop or Shelf Installation

Proceed to Section 4.4, Powering Up and Stacking the SEH.

4-2

SEH100TX User’s Guide

Rackmount Installation

4.3RACKMOUNT INSTALLATION

To install the SEH in a 19-inchrack, Cabletron Systems provides an accessory kit with the SEH that includes rack mounting brackets, mounting screws, and astrain-reliefbracket for cable management.

Rack mounting the SEH involves the following:

Attaching the strain-reliefbracket

Rack mounting the SEH

Stacking the SEH when applicable

Attaching the Strain-ReliefBracket

Attach the strain-reliefbracket to the front of the SEH as follows:

1.Locate the strain-reliefbracket and four8-32x3/8-inchpan-headscrews from the rackmount kit.

Do NOT attempt to attach thestrain-reliefbracket with screws other than the8-32x3/8-inchscrews included with the SEH. Use of longer screws may damage the unit or cause electrical shock.

2. Attach the strain-reliefbracket to the bottom of the SEH(Figure 4-2).

Screws (4)

Strain-ReliefBracket

EPIM1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1X

2X

3X

4X

5X

6X

7X

8X

9X

10X

11X

1

1

2

3

4

5

6

7

8

9

1110

 

 

 

 

 

 

 

 

 

 

 

 

CLN

 

 

 

 

 

 

 

 

 

 

 

E

 

 

 

 

 

 

 

 

 

LNK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RCV

MGMT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PWR

12X

13X

14X

15X

16X

17X

18X

19X

20X

21X

22X

2

2221201918171615141312

 

 

 

 

 

 

 

 

 

 

 

 

E

 

 

 

 

 

 

 

 

 

LNK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RCV

 

 

 

SEH100TX-22

LANVIEW®

WITH

HubSTACK100BASE-TXHUB

EPIM2

 

 

1510_12

Figure 4-2Attaching theStrain-ReliefBracket

SEH100TX User’s Guide

4-3

Chapter 4: Installation

Rack Mounting the SEH

Refer to Figure 4-3 and proceed as follows to install the SEH into a19-inchrack.

1.Remove the four cover screws (two from each side) located along the front edges of each side of the SEH.

Do not remove the cover from the SEH. Do not remove any other screws from the unit.

2.Using the four 6-32x3/8-inchreplacement flathead cover screws provided in the rackmount kit, attach the rack mounting brackets to each side of the SEH.

Rack Mounting

Brackets (2)

HubSTACK 100BASE-TXHUBWITH LANVIEW®

SEH100TX-22

 

RCV

 

 

 

 

 

 

 

 

LNK

 

 

 

 

 

 

E

 

22 21 20 19 18 17 16 15 14 13 12

2

PWR

 

 

 

 

 

 

 

 

MGMT

RCV

 

 

 

 

 

 

 

CLN

LNK

 

 

 

 

 

 

E

 

11 10 9 8 7

6

5

4

3

2

1

1

EPIM 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

22X

21X

20X

19X

18X

17X

16X

15X

14X

13X

12X

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11X

10X

9X

8X

7X

6X

5X

4X

3X

2X

1X

EPIM 1

1510_05

Screws (4)

Figure 4-3Installing the Rack Mounting Brackets

The cooling fans at the rear panel of the SEH must have

!adequate clearance (two inches on either side and in the

CAUTION

rear) for unrestricted air flow. The temperature for the selected

 

location must be maintained between 5°C and 40°C, and

 

fluctuate less than 10°C per hour.

3.Ensure that the rack used will support the unit, and that the rack will remain stable with the unit installed in it. Support the SEH securely from underneath, and align the mounting brackets of the SEH chassis with the screw holes in the equipment rack as shown in Figure 4-4.Fasten the SEH to the equipment rack securely.

4-4

SEH100TX User’s Guide

Powering Up and Stacking the SEH

19-InchRack

HubSTACK 100BASE-TXHUBWITH LANVIEW®

SEH100TX-22

 

RCV

 

 

 

 

 

 

 

 

LNK

 

 

 

 

 

 

E

 

22 21 20 19 18 17 16 15 14 13 12

2

PWR

 

 

 

 

 

 

 

 

MGMT

RCV

 

 

 

 

 

 

 

CLN

LNK

 

 

 

 

 

 

E

 

11 10 9 8 7

6

5

4

3

2

1

1

EPIM 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

22X

21X

20X

19X

18X

17X

16X

15X

14X

13X

12X

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11X

10X

9X

8X

7X

6X

5X

4X

3X

2X

1X

EPIM 1

Screws (4)

1510_06

Figure 4-4Installing the SEH in the Rack

Proceed to Section 4.4, Powering Up and Stacking the SEH.

4.4POWERING UP AND STACKING THE SEH

The following section details the procedures that must be followed to power up and interconnect stacked hubs.

Failure to follow this procedure may result in damage to the

!equipment.

CAUTION

If you are using an intelligent hub (SEHI) to manage the stack,

!you must locate the SEHI at the bottom of the stack.

CAUTION

The SEHI must be completely powered up and initialized before powering up and interconnecting the rest of the stack.

If you are using an SEHI to manage the SEH stack, proceed to Section 4.4.1. If you are not using an SEHI to manage the SEH stack, proceed toSection 4.4.2.

SEH100TX User’s Guide

4-5

Chapter 4: Installation

4.4.1Stacking SEH Hubs with an SEHI

Follow the procedures in this section if you are using an SEHI to manage an SEH stack:

NOTE

The SEH and the SEHI have universal power supplies that

allow connection to power sources from 100 Vac to 125 Vac

 

@ 4.0 A or 200 Vac to 250 Vac @ 2.0 A, 50/60 Hz.

1.Power up the SEHI by plugging the power cord into the back panel of the SEHI and plugging the other end into a grounded receptacle.

Locate the SEHI at the bottom of the stack.

NOTE

For management purposes, stacked hubs are always numbered from 1 to 5 starting at the bottom.

2.Verify that the PWR LED is on, indicating that the SEHI is receiving power. After the SEHI runs a self test and completes the boot process successfully, the CPU LED blinks green indicating normal operation. If the LED remains red, the processor is faulty; contact Cabletron Systems Technical Support. Do not proceed with the following steps until the CPU LED is a steady blinking green.

Do NOT power up or interconnect any other hubs in the stack

!until the SEHI has successfully completed the boot process.

CAUTION

Also, do NOT connect the interconnect cable between the SEH and the SEHI before powering up the SEH. Otherwise, damage to the SEH may result.

3.Power up the SEH above the SEHI in the stack by plugging the power cord into the back panel of the SEH and plugging the other end into a grounded receptacle.

4.Verify that the PWR LED is on, indicating that the SEH is receiving power.

4-6

SEH100TX User’s Guide

Powering Up and Stacking the SEH

5.Attach the interconnect cable to the “IN” port on the rear panel of the SEH as shown in Figure 4-5.

REAR VIEW

SEHI Managing 4 SEH Non-IntelligentHubs

SEH100TX-22 100BASE-TXHUB WITH LANVIEW®

OUT

SEH100TX INTERCONNECT

IN

SEH100TX-22 100BASE-TXHUB WITH LANVIEW®

OUT

SEH100TX INTERCONNECT

IN

SEH100TX-22 100BASE-TXHUB WITH LANVIEW®

OUT

SEH100TX INTERCONNECT

IN

SEH100TX-22 100BASE-TXHUB WITH LANVIEW®

OUT

SEH100TX INTERCONNECT

IN

SEHI100TX-22 100BASE-TXHUBWITH LANVIEW®

OUT

SEHI100TX INTERCONNECT

IN

100BASE-TXHubSTACK Interconnect Cable

1511_07

Figure 4-5Stacking the SEH and SEHI

6.Attach the other end of the interconnect cable to the “OUT” port on the rear panel of the hub at the bottom of the stack.

Do not leave an interconnect cable connected at only one end

!during network operation. Corrupted data may result.

CAUTION

7. Repeat steps 3 through 6 until all SEH hubs are connected.

SEH100TX User’s Guide

4-7

Chapter 4: Installation

4.4.2Stacking Unmanaged SEH Hubs Together

Use the following procedure to stack non-intelligenthubs (SEHs) together.

NOTE

The SEH has a universal power supply that allows connection

to power sources from 100 Vac to 125 Vac @ 4.0 A or 200 Vac

 

to 250 Vac @ 2.0 A, 50/60 Hz.

1.Power up each SEH in the stack by plugging the power cord into the back panel of the SEH and plugging the other end into a grounded receptacle.

2.Verify that the PWR LED for each hub is on, indicating that each SEH is receiving power.

3.Attach the interconnect cable to the “IN” port on the rear panel of the second SEH in the stack as shown in Figure 4-5.

4.Attach the other end of the interconnect cable to the “OUT” port on the rear panel of the first SEH in the stack.

Do not leave an interconnect cable connected at only one end

!during network operation. Corrupted data may result.

CAUTION

5. Continue connecting ports in this manner until all hubs are connected.

4.5INSTALLING AN EPIM

This section contains procedures on how to replace an EPIM-100TX,EPIM-100FX,orEPIM-100FMBto upgrade or change the capabilities of yourSEH100TX-22.After installing a new EPIM, refer to the appropriate EPIM section in Appendix A to verify proper operation.

Observe all static precautions while handling an EPIM.

!

CAUTION

4-8

SEH100TX User’s Guide

Installing an EPIM

To install an EPIM-100TX,EPIM-100FX,orEPIM-100FMB,proceed as follows:

When removing an EPIM, pull the module straight out to

!prevent damage to the connector.

CAUTION

1.Remove the coverplate or the existing EPIM (whichever applies).

2.Slide the new EPIM into place, making sure that the connectors on the rear of the EPIM align correctly and firmly with the connector inside the SEH. Refer to Figure 4-6.

3.Tighten the mounting screw.

EPIM 2

LNK

EPIM-100TX

EPIM 1

1510_09

Figure 4-6Installing an EPIM

LNK

EPIM-100TX

SEH100TX User’s Guide

4-9

Chapter 4: Installation

4-10

SEH100TX User’s Guide

CHAPTER 5

CONNECTING TO THE NETWORK

This chapter outlines the procedure for connecting the SEH to a network. Ensure that the network meets the guidelines and requirements outlined in Chapter 3, Installation Requirements and Specifications, before installing theSEH100TX-22.

5.1CONNECTING THE SEH100TX-22TO THE NETWORK

The procedure for connecting network segments to the SEH varies depending on the media and ports being connected. Refer to the following list and perform the procedure described in the subsections that apply to connecting the SEH to a network:

Network Ports

Section 5.1.1

EPIM-100TX

Section 5.1.2

EPIM-100FXorEPIM-100FMBSection 5.1.3

Prior to connecting the network cabling, check the connectors for the proper pinouts as shown in Chapter 3.

5.1.1Connecting to Network Ports

Attach UTP segments to the RJ45 network ports on the front panel of the SEH. Each RJ45 network port on the SEH incorporates a polarity detection and correction feature. The polarity detection and correction feature allows the SEH to pass data regardless of the polarity of the twisted pair segment’s receive link. Operating in this condition is not recommended; the segment should be removed from the network and wired correctly by a technician.

Connect the twisted pair segments to the SEH as follows:

1.Plug the RJ45 connector from each twisted pair segment into the desired network port on the SEH. See Figure 5-1.

2.Plug the RJ45 connector at the other end or the twisted pair segment into the other device as appropriate.

SEH100TX User’s Guide

5-1

Chapter 5: Connecting to the Network

16X

5X

15X

4X

14X

3X

13X

2X

12X

1X

EPIM

2

 

 

LNK

E P I M

- 1 0 0

T X

 

 

 

EPIM

1

 

1511_10

Figure 5-1SEH Network Ports

3.Check that the applicable LNK LED for the port is on. If the LED is off, perform each of the following steps until it is on:

a.Check that the 100BASE-TXdevice at the other end of the twisted pair segment is powered up.

b.Verify that the RJ45 connector on the twisted pair segment has the proper pinouts.

c.Check the cable for continuity.

d.Check that the twisted pair connection meets the cable specifications outlined in Section 3.1.2.

If a link is not established, contact Cabletron Systems Technical Support. Refer to Section 1.3 for details on getting help.

5.1.2Connecting to an EPIM-100TX

The EPIM-100TXis often used to provide a connection between the SEH and a bridge, router, or switch. Normally, in this configuration, a“straight-through”cable is used and the EPIM crossover switch, shown inFigure 5-2,is set to “not crossed over.”

5-2

SEH100TX User’s Guide

Connecting the SEH100TX-22to the Network

The EPIM-100TXis also used to provide another RJ45 port to connect to a UTP segment. Before connecting a segment to theEPIM-100TX,check each end of the segment to determine if the wires have been crossed over for the proper connection. If the wires do not cross over, use the switch on theEPIM-100TXto internally cross over the RJ45 port. Refer to

Figure 5-2 to set theEPIM-100TXcrossover switch.

Position X (crossed over)

1. RX+

5. NC

2. RX-

6. TX-

3. TX+

7. NC

4. NC

8. NC

Position =

(not crossed over)

1. TX+

5.

NC

 

2. TX-

6.

RX-

 

3. RX+

7. NC

 

4. NC

8. NC

1511_11

Figure 5-2EPIM-100TXCrossover Switch

Connect an EPIM-100TXto a twisted pair segment as follows:

1.Connect the twisted pair segment to the module by plugging the RJ45 connector on the twisted pair segment into the RJ45 port on the module. See Figure 5-2.

2.Plug the RJ45 connector at the other end of the twisted pair segment into the other device as appropriate.

3.Check that the LNK LED on theEPIM-100TXis on. If the LED is off, perform each of the following steps until it is on:

a.Check that the 100BASE-TXdevice at the other end of the twisted pair segment is powered up.

b.Verify that the RJ45 connector on the twisted pair segment has the proper pinouts.

SEH100TX User’s Guide

5-3

Chapter 5: Connecting to the Network

c.Check the cable for continuity.

d.Check that the twisted pair connection meets the cable specifications outlined in Section 3.1.2.

e.Check that the crossover switch is in the correct position.

If a link is not established, contact Cabletron Systems Technical Support.

5.1.3nnecting an EPIM-100FXorEPIM-100FMB

The EPIM-100FXandEPIM-100FMBhave an SC style network port (seeFigure 5-3).Cabletron Systems supplies fiber optic cables that use SC connectors that are keyed to insure proper crossover of the transmit and receive fibers.

NOTE

An odd number of crossovers (preferably one) must be

maintained between devices so that the transmit port of one

 

device is connected to the receive port of the other device and

 

vice versa.

Use the following steps to connect a fiber segment to the EPIM-100FXorEPIM-100FMB:

1.Remove the protective plastic covers from the fiber optic ports on the module port and from the ends of the connectors.

Do not touch the ends of the fiber optic strands, and do not let

!the ends come in contact with dust, dirt, or other contaminants.

CAUTION

Contamination of the ends causes problems in data

 

 

transmissions. If the ends become contaminated, clean them

 

with alcohol using a soft, clean, lint-freecloth.

2.Insert one end of the SC connector into the SEH EPIM-100FXorEPIM-100FMB.SeeFigure 5-3.

3.At the other end of the fiber optic cable, attach the SC connector to the other device.

5-4

SEH100TX User’s Guide

Testing the Installation

16X

5X

15X

4X

14X

3X

13X

2X

12X

1X

EPIM

2

 

LNK

EPIM-100FX

EPIM

1

 

1510_10

Figure 5-3EPIM-100FXPort

4.Check that the EPIM-100FXorEPIM-100FMBLNK LED is on. If the LED is off, perform the following steps until it is on:

a.Check that the device at the other end of the link is powered up.

b.Verify that there is proper “cross-over”of the fiber optic strands between the applicable port on the SEH and the fiber optic device at the other end of the fiber optic segment.

c.Verify that the fiber optic connection meets the dB loss specifications outlined in Section 3.1.3.

If a link is not established, contact Cabletron Systems Technical Support. Refer to Section 1.3 for instructions on getting help.

5.2TESTING THE INSTALLATION

The SEH100TX-22is now ready for operation. Before placing the network into service, test that all stations can be addressed and that the SEH and all stations are indicating normal operation. Ensure that the networking software is configured properly to match the installed network. If there are any errors or abnormal operation, proceed toChapter 6, Troubleshooting.

SEH100TX User’s Guide

5-5

Chapter 5: Connecting to the Network

5-6

SEH100TX User’s Guide

CHAPTER 6

TROUBLESHOOTING

This chapter contains instructions for using LANVIEW LEDs to troubleshoot physical layer network problems.

6.1INSTALLATION TEST

After connecting the SEH to the network, verify that packets pass between all Ethernet devices connected to the SEH and any other devices connected to the network. If there is a problem with any of the attached devices, check the link as follows:

1.Check that the LNK LED, if applicable, for the port is on. If the LED is off, perform each of the following steps until it is on.

a.Check that the 100BASE-Tdevice at the other end of the twisted pair segment is powered up.

b.Verify that the connector on the twisted pair segment has the proper pinouts. Refer to Chapter 3, for the pin assignments for twisted pair connectors.

c.For the EPIM-100FXorEPIM-100FMB,check that the TX and RX strands are properly connected.

d.Check the cable for continuity. Several tools are available for this test, depending on the media used.

e.Check that the twisted pair segments or fiber optic segments meet the cable specifications as described in Chapter 3.

SEH100TX User’s Guide

6-1

Chapter 6: Troubleshooting

2.If the remote station is ready and the LNK LED is on, but no data passes through the port, one of the following conditions may exist:

a.Network management has disabled the port. Correct this condition by enabling the port through network management.

b.The port is segmented either because the collision detector was on for more than 110 s or the SEH detected more than 32 consecutive collisions on the attached segment. The affected port remains segmented until a good packet is transmitted/received without collisions.

If the LNK LED is still off, contact Cabletron Systems Technical Support.

6.2USING LANVIEW

The SEH incorporates the Cabletron Systems LANVIEW status monitoring and diagnostics system. LANVIEW LEDs help diagnose problems such as power failure or cable fault. The SEH includes the following LANVIEW LEDs:

PWR, for power status

MGMT, for management status

RCV (Receive),LNK (Link), andCLN (Collision) for Ethernet status

Figure 6-1 provides a quick reference chart of LED locations and definitions. This chapter also includes a detailed description of each LED.

6-2

SEH100TX User’s Guide

Using LANVIEW

HubSTACK 100BASE-TXHUBWITH LANVIEW®

SEH100TX-22

 

 

RCV

 

 

 

 

 

 

 

 

 

 

LNK

 

 

 

 

 

 

E

22X

 

 

22 21 20 19 18 17 16 15 14 13 12 2

 

PWR

 

 

 

 

 

 

 

 

 

 

MGMT

RCV

 

 

 

 

 

 

E

 

 

CLN

LNK

 

6

5

4

3

2

 

 

 

11 10 9 8 7

1 1

11X

 

 

 

 

 

 

 

 

 

 

LED NAME

LED COLOR

DEFINITION

 

PWR

Off

 

No power

 

 

 

(Power)

Green (Solid)

Power

 

 

 

 

 

 

 

 

 

 

 

MGMT

Green (Flashing)

SEH managed by an

(Management)

 

 

intelligent hub

 

 

Off

 

SEH not managed

CLN

Red (Flashing)

Collision

 

 

 

(Collision)

Off

 

No collision

 

 

 

 

 

 

RCV

Yellow (Flashing)

SEHI is receiving data

(Receive)

Off

 

No activity

 

 

 

 

 

 

LNK

Green

 

Link established

 

(Link)

Off

 

No Link

 

 

 

 

 

 

 

 

 

 

15101_02

Figure 6-1LANVIEW LEDs

Flashing indicates an irregular LED pulse.

NOTE

Blinking indicates a steady LED pulse.

PWR

When this green LED is on, it indicates that the SEH is receiving power. If this LED is off, it indicates a loss of input power. Check that the power cord is properly plugged into the SEH and into the ac input power source (circuit breaker, fuse, etc.). If the proper source power is present, the problem could be with the SEH.

SEH100TX User’s Guide

6-3

Chapter 6: Troubleshooting

MGMT

This LED flashes when an intelligent hub is managing the SEH. If this LED is not flashing, an intelligent hub is not managing the SEH. If an intelligent hub is attached to the SEH and the LED is not flashing, inspect the HubSTACK interconnect cables for proper connection.

CLN

When this red LED flashes, it indicates that a collision has occurred on one of the ports.

RCV

When a yellow RCV LED flashes, it indicates that the SEH is receiving data packets from the associated port segment. Each SEH port has a corresponding RCV LED:

• Network Ports: RCV LEDs

1-22

EPIM 1: RCV LED

E1

EPIM 2: RCV LED

E2

LNK

When a green LNK LED is on, it indicates an established link between the associated port and the device at the other end of the segment. The LNK LED remains on as long as a link is maintained. Each SEH Network Port (ports 1-22)has a corresponding LNK LED.

6-4

SEH100TX User’s Guide

EPIM Specifications

APPENDIX A

EPIM INFORMATION

A.1 EPIM SPECIFICATIONS

EPIMs enable the connection of the SEH to the network using different media types.The SEHI100TX-22supports theEPIM-100TX,EPIM-100FX,and theEPIM-100FMB.This appendix provides the specifications for each EPIM.

A.1.1 EPIM-100TX

The EPIM-100TXis an RJ45 connector supporting Unshielded Twisted Pair (UTP) cabling.

The slide switch on the EPIM-100TXdetermines the crossover status of the cable pairs. If the switch is on theX side, the pairs are internally crossed over. If the switch is on the= side, the pairs are not internally crossed over.Figure A-1 shows the pinouts for theEPIM-100TXin both positions.

Position X (crossed over)

1. RX+

5. NC

2. RX-

6. TX-

3. TX+

7. NC

4. NC

8. NC

Position =

(not crossed over)

1. TX+

5.

NC

 

2. TX-

6.

RX-

 

3. RX+

7. NC

 

4. NC

8. NC

1511_11

Figure A-1

EPIM-100TXPinouts

 

SEH100TX User’s Guide

A-1

Appendix A: EPIM Information

A.1.2 EPIM-100FX

The EPIM-100FXshown inFigure A-2 supports Multimode Fiber Optic cabling. TheEPIM-100FXis equipped with an SC style connector. Specifications for theEPIM-100FXare listed inTable A-1.

16X

5X

15X

4X

14X

3X

13X

2X

12X

1X

EPIM

2

LNK

EPIM-100FX

EPIM

1

1510_10

Figure A-2EPIM-100FX

Table A-1Transmitter Power(EPIM-100FX)

Cable Type

Worst Case Budget

Typical Budget

 

 

 

 

 

 

50/125 m fiber optic

6.0 dB

9.0 dB

 

 

 

62.5/125 m fiber optic

9.0 dB

12.0 dB

 

 

 

100/140 m fiber optic

15.0 dB

18.0 dB

 

 

 

The transmitter power levels listed above are peak power levels after optical overshoot. A peak power meter must be used to correctly compare the values given above to those measured on any particular port. If power levels are being measured with an average power meter, add 3 dBm to the measurement to compare the measured values to the values listed above.

A-2

SEH100TX User’s Guide

EPIM Specifications

A.1.3 EPIM-100FMB

The EPIM-100FMBshown inFigure A-3 supports multimode fiber optic cabling and has an SC style connector.

16X

5X

15X

4X

14X

3X

13X

2X

12X

1X

 

LNK

 

-100FMB

 

EPIM

EPIM

1

 

1511_20

Figure A-3EPIM-100FMB

The EPIM-100FMBacts as anon-filteringbridge. Its purpose is to extend the Broadcast Domain of a shared access100BASE-TLAN, so that a full length of fiber optic cable can be used to reach the next domain or more typically to a switch port.

The maximum 100BASE-Tcollision domain using UTP cable to the desktop and fiber cable in the next domain or switch port is only 263 meters (100 meters of UTP and 163 meters of fiber optics). There are circumstances where the maximum fiber optic cable length of 163 meters does not meet some requirements such as in the cabling of high rise buildings or campus environments. TheEPIM-100FMBhelps meet these requirements by extending the maximum fiber optic cable length that can be used from 163 meters to 400 meters.

SEH100TX User’s Guide

A-3

Appendix A: EPIM Information

Table A-2 provides the specifications for theEPIM-100FMB.

Table A-2Transmitter Power(EPIM-100FMB)

Cable Type

Worst Case Budget

Typical Budget

 

 

 

 

 

 

50/125 m fiber optic

6.0 dB

9.0 dB

 

 

 

62.5/125 m fiber optic

9.0 dB

12.0 dB

 

 

 

100/140 m fiber optic

15.0 dB

18.0 dB

 

 

 

The transmitter power levels and receive sensitivity levels listed are peak power levels after optical overshoot. A peak power meter must be used to correctly compare the values given above to those measured on any particular port. If power levels are being measured with an average power meter, add 3 dBm to the measurement to compare the measured values to the values listed above.

A-4

SEH100TX User’s Guide

INDEX

Numerics

100BASE-TXcable length 3-2 crosstalk 3-2 impedance 3-2 jitter 3-2

noise 3-2 temperature 3-3

A

Agency approvals emission 3-6 immunity 3-7 safety 3-6

C

Cable

interconnecting SEHs 3-1 lengths 3-4

Cable specifications multimode fiber optic 3-3 overview of 3-1

UTP 3-2

D

Dimensions 3-7

E

Emission, agency approvals 3-6 Environmental requirements 3-6 EPIM media type, connector 2-4 EPIM specifications

EPIM-100FMB A-3 EPIM-100FX A-2 EPIM-100TX A-1

EPIM-100FMBconnection of 5-4

EPIM-100FXconnection of 5-4

EPIM-100TXconnection of 5-2

H

Help

related manuals 1-4 HubSTACK

cable requirements 3-1

I

Immunity 3-7 Installation 5-5, 6-1

EPIMs 4-8 rackmount 4-3 stacking 4-5

strain-relief bracket 4-3 tabletop or shelf 4-2 testing 6-1

unpacking 4-1 Interconnecting SEHs

requirements for 3-1

L

LANVIEW LEDs 6-3 use of 6-2

N

Network connection EPIM-100FMB 5-4 EPIM-100FX 5-4 EPIM-100TX 5-2 SEH100TX-22 5-1

Network connection, UTP segments 5-1

Network port specifications SEH100TX-22 3-5

P

Power supply requirements 3-6

SEH100TX User’s Guide

Index-1

Index

S

Safety, agency approval 3-6 SEH features 2-2 SEH100TX-22

connection of 5-1 Size

dimensions 3-7 Specifications

environmental requirements 3-6 power supply requirements 3-6 SEH network ports 3-5

T

Testing 5-5

Troubleshooting 6-1

U

UTP

specification of 3-1 UTP segments

connection of 5-1

Index-2

SEH100TX User’s Guide

POWER SUPPLY CORD

The mains cord used with this equipment must be a 2 conductor plus ground type with minimum 0.75 mm square conductors and must incorporate a standard IEC appliance coupler on one end and a mains plug on the other end which is suitable for the use and application of the product and that is approved for use in the country of application.

GERMAN:

Die Netzleitung, die mit diesem Geraet benuetzt wird, soll einen zwei Leiter mit Erdleiter haben, wobei die Leiter mindestens 0.75 mm sind, mit einer normalen IEC Geraetesteckdose an einem Ende und einem Geraetestecker am anderen Ende versehen sind, der fuer den Gebrauch und die Anwendung des Geraetes geeignet und der zum Benuetzen im Lande der Anwendung anerkannt ist.

SPANISH:

El cable principal de la red eléctrica utilizado con este equipo debe tener 2 conductores y 1 toma de tierra con un mínimo de 0.75 mm2 cada uno y necesita tener un aparato de acoplamiento standard IEC en un extremo y un enchufe para el cable principal de la red eléctrica en el otro extremo, lo cual sea adecuado para el uso y applicación del producto y lo cual sea aprobado para uso en el pais de applicación.

FRENCH:

Le cordon d' alimentation reliant cet appareil au secteur doit obligatoirement avoir deux fils conducteurs de 0.75 mm2 minimum et un fil de terre. It doit également être équipé du côté appareil d'une fiche agrée IEC et du côte secteur, d'une prise adaptée à l'usage du produit et aux normes du pays où l'appareil est utilisé.