Cabletron Systems 24 Manuale utente

CABLETRON SYSTEMS, P. O. Box 5005, Rochester, NH 03866-5005

STH-22/-24/-42/-44

STACKABLE TOKEN RING HUB

USER’S GUIDE

NOTICE

iii

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

INFORMATIONCONTAINEDINIT,EVENIFCABLETRONSYSTEMSHAS

BEEN ADVISED OF, KNOWN, OR SHOULD HAVE KNOWN, THE

POSSIBILITY OF SUCH DAMAGES.

Cabletron Systems, Inc.

P.O. Box 5005, Rochester, NH 03866-5005

Printed in the United States of America

Order Number: 9031319 February 1996

STH

HubSTACK

, and

MicroMMAC

are trademarks of Cabletron Systems,

Inc.

SPECTRUM

LANVIEW

and

Remote LANVIEW

, are registered

trademarks of Cabletron Systems, Inc.

IBM

is a registered trademark of International Business Machines

Corporation.

CompuServe

is a registered trademark of CompuServe, Inc.

DEC

and

VT100

are trademarks of Digital Equipment Corporation.

Windows

is a registered trademark of Microsoft Corporation.

Printed On Recycled Pa

per

NOTICE

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

likelyto causeinterference inwhich casethe userwill berequired tocorrect 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.

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.

Leprésentappareilnumérique n’émetpasdebruits radioélectriquesdépassant

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.

NOTICE

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.

CABLETRON SOFTWARE PROGRAM LICENSE

1. LICENSE. Youhavetherightto use onlythe one (1)copy of theProgram 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.

NOTICE

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 EXPRESS OR

IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF

MERCHANTABLITY AND FITNESS FOR A PARTICULAR PURPOSE, WITH

RESPECTTO THE PROGRAM, THEACCOMPANYING 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 WARRANTEES IN SOME INSTANCES THE

ABOVE LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO YOU.

NOTICE

vii

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 at 252.227-7013. Cabletron Systems, Inc., 35 Industrial Way.

Rochester, New Hampshire 03866

CONTENTS

CHAPTER 1 INTRODUCTION

1.1 Using This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1.2 STH Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1.2.1 LANVIEW LEDs . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

1.2.2 TCU Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

1.2.3 Automatic Beacon Recovery Process . . . . . . . . 1-4

1.2.4 Support for Passive MAU Workgroups . . . . . . 1-4

1.3 Related Manuals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

1.4 Getting Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

CHAPTER 2 REQUIREMENTS & SPECIFICATIONS

2.1 General Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.2 Cable Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.3 UTP Cabling Specifications . . . . . . . . . . . . . . . . . . . . . . 2-3

2.3.1 UTP Cable Categories . . . . . . . . . . . . . . . . . . . . . 2-3

2.3.2 UTP Lobe Lengths . . . . . . . . . . . . . . . . . . . . . . . . 2-5

2.4 STP Cabling Specifications . . . . . . . . . . . . . . . . . . . . . . . 2-5

2.4.1 STP Cable Categories. . . . . . . . . . . . . . . . . . . . . . 2-6

2.4.2 STP Lobe Lengths. . . . . . . . . . . . . . . . . . . . . . . . . 2-6

2.5 TCU Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

2.6 Operating Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

2.6.1 Ring Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

2.6.2 Ring Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

2.6.3 Power Supply Requirements . . . . . . . . . . . . . . . 2-9

2.6.4 Environmental Requirements . . . . . . . . . . . . . 2-10

2.6.5 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

2.6.6 Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

CONTENTS

CHAPTER 3 INSTALLATION

3.1 Unpacking the STH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.2 Installing the STH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.2.1 Rack Mount or Wall Mount Hardware. . . . . . . 3-1

3.2.2 Adding the STH to a Stack . . . . . . . . . . . . . . . . . 3-2

3.2.3 Attaching the Strain Relief Bracket . . . . . . . . . . 3-3

3.2.4 Rack-Mounting the STH . . . . . . . . . . . . . . . . . . . 3-3

3.2.5 Wall-Mounting the STH . . . . . . . . . . . . . . . . . . . 3-4

3.2.6 Free-Standing Installation. . . . . . . . . . . . . . . . . . 3-6

3.2.7 Connecting the STH to the Power Source . . . . 3-7

3.2.8 Attaching Network Cabling to TCU Ports . . . . 3-7

3.3 Finishing the Installation . . . . . . . . . . . . . . . . . . . . . . . . 3-8

CHAPTER 4 TROUBLESHOOTING

4.1 LANVIEW LED Signals . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.2 Trouble Resolution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Page 1-1

CHAPTER 1

INTRODUCTION

Welcome to the Cabletron Systems

STH-22/-24/-42/-44 Stackable Token

Ring Hub User’s Guide

. The STH (Stackable Token Ring Hub) is a non-

intelligent hub designed to provide expanded connectivity for Cabletron

Systems’ STHi intelligent hubs and Cabletron Systems MicroMMAC

intelligent hubs. This manual provides installation instructions and

reference information for STH models 22, 24, 42, and 44.

Note

: The term STH is used throughout this manual when describing

features and functions that are common to the above listed STH models.

1.1 Using This Manual

Read through this manual completely to familiarize yourself with its

content and to gain an understanding of the features and capabilities of

the STH. A general working knowledge of IEEE 802.5 Token Ring data

communications networks and their physical layer components will be

helpful when installing the STH.

Chapter 1,

INTRODUCTION

, outlines the contents of this manual,

brieﬂy describes STH features, and concludes with a list of related

manuals.

Chapter 2,

REQUIREMENTS & SPECIFICATIONS

, describes

installation requirements, network guidelines, and STH operating

speciﬁcations.

Chapter 3,

INSTALLATION

, contains instructions for installing the STH.

Chapter 4,

TROUBLESHOOTING

, describes how to use the LANVIEW

LEDs to troubleshoot network problems.

1.2 STH Overview

The STH is a non-intelligent hub which provides expanded connectivity

for Cabletron Systems’ STHi intelligent hubs and Cabletron Systems

MicroMMAC intelligent hubs. Each STH added to an intelligent hub‘s

managed stack increases the LAN’s connectivity by 12 or 24 Trunk

STH Overview

Page 1-2

Connector Ports (TCUs) for connections to stations and other network

devices.

Figure 1-1. Front and Back Views of the STH-24

Up to four STH hubs can be linked to the same intelligent hub, bringing

the total direct connectivity potential to 120 managed TCU ports in the

stack. Intelligent hubs serve as the logical “top” of the stack and provide

full frame and error statistics for the collective stack, for each individual

device, and for each port. Hubs can be added to and removed from the

stack without powering-down any of the devices involved.

Cabletron’s HubSTACK Interconnect cables, Part Number 9380141, are

needed when stacking hubs.

The STH fully conforms to IEEE 802.5Token Ring speciﬁcations for

connectivity to Token Ring equipment. STH hubs offer:

• support for Cabletron Systems’ Automatic Beacon Recovery

Process (ABRP),

• Multiple Ring Out connectivity for Passive MAU workgroups,

• automatic speed fault protection,

• active ﬁltering, re-timing, and repeating circuitry on all ports,

• and LANVIEW LEDs for “at-a-glance” diagnostic monitoring.

The STH does not have management capability and is not intended to be

used as a stand-alone device. Management must be provided by a

Cabletron Systems intelligent hub, either the STHi Stackable Token Ring

Hub with Intelligence or the MicroMMAC intelligent hub.

HubSTACK

STH-24

TOKEN RING HUB with LANVIEW®

SUPPORTING 100 OHM UTP CABLE

16Mb/s

PWR

STACK SPEED

4M 16M

STACK

RESERVED

STH-24 TOKEN RING HUB with LANVIEW®

24X 23X 22X 21X 20X 19X 18X 17X 16X 15X 14X 13X

12X 11X 10X 9X 8X 7X 6X 5X 4X 3X 2X 1X

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