Cabletron Systems SEHI-32, SEHI-34, SEHI-22, SEHI-24 User Manual

SEHI-22, SEHI-24, SEHI-32, AND SEHI-34

The Complete Networking Solution™

10BASE-T INTELLIGENT STACKABLE HUB

USER’S GUIDE

CABLETRON SYSTEMS, P. O. Box 5005, Rochester, NH 03867-0505

NOTICE

per

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.

Order Number: 9030916-01 February 94

SPECTRUM®,

of Cabletron Systems, Inc.

IBM

is a registered trademark of International Business Machines Corporation.

i960

is a registered trademark of Intel Corporation.

DEC, VT200 Ethernet CompuServe Windows

LANVIEW®,

, and

VT300

is a trademark of Xerox Corporation.

is a registered trademark of CompuServe, Inc.

is a registered trademark of Microsoft Corporation.

Remote LANVIEW® , and

are trademarks of Digital Equipment Corporation.

Printed On

Recycled Pa

HubSTACK™ are trademarks

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 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.

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.

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. 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.

iii

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 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 WARRANTEES 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 5222719 (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 52.2277013 (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 03867

TABLE OF CONTENTS

APPENDIX A TABLE OF CONTENTS v

CHAPTER 1 INTRODUCTION

1.1 USING THIS MANUAL............................................................1-1

1.2 GETTING HELP........................................................................1-2

1.3 SEHI OVERVIEW .....................................................................1-2

1.4 SEHI FEATURES......................................................................1-3

1.5 STACKABLE CAPABILITIES..................................................1-4

1.6 REMOTE NETWORK MANAGEMENT CAPABILITIES ...... 1-4

1.7 OPTIONAL FEATURES ........................................................... 1-5

1.8 RELATED MANUALS ..............................................................1-6

CHAPTER 2 INSTALLATION

REQUIREMENTS/SPECIFICATIONS

2.1 CABLE SPECIFICATIONS.......................................................2-1

2.1.1 HubSTACK Interconnect Cable Requirements...........2-1

2.1.2 UTP and STP Cable Specifications for the Network Ports

and EPIM-T Module......................................................2-2

2.1.3 Multimode Fiber Optic Cable Specifications for the

EPIM-F1 and EPIM-F2 Modules ................................. 2-4

2.1.4 Single Mode Fiber Optic Cable Specifications for

the EPIM-F3 Module .................................................... 2-5

2.1.5 Thin-Net Network Requirements for the EPIM-C Mod-

ule 2-6

2.1.6 AUI Cable Requirements for the EPIM-A

and EPIM-X Modules.................................................... 2-7

2.2 NETWORK PORT SPECIFICATIONS ....................................2-7

2.2.1 SEHI-22 and SEHI-24 Network Port Specifications... 2-8

2.2.2 SEHI-32 and SEHI-34 Network Port Specifications... 2-8

2.3 EPIM SPECIFICATIONS .......................................................2-10

2.3.1 EPIM-T........................................................................2-10

2.3.2

2.3.3 EPIM-F3......................................................................2-12

2.3.4 EPIM-C........................................................................ 2-14

2.3.5 EPIM-A and EPIM-X (AUI Port)................................2-15

2.4 COM PORT REQUIREMENTS .............................................. 2-16

2.5 TRANSCEIVER REQUIREMENTS.......................................2-16

EPIM-F1 and EPIM-F2.............................................2-11

CONTENTS

2.6 OPERATING SPECIFICATIONS...........................................2-17

CHAPTER 3 INSTALLATION

3.1 UNPACKING THE SEHI ..........................................................3-1

3.2 INSTALLING THE SEHI..........................................................3-1

3.2.1 Stacking the SEHI.........................................................3-2

3.2.2 Attaching the Strain Relief Bracket.............................3-4

3.2.3 Rack Mounting the SEHI..............................................3-5

3.2.4 Wall Mounting the SEHI ..............................................3-6

3.2.5 Free-Standing Installation............................................3-7

3.3 CONNECTING THE SEHI TO THE POWER SOURCE.........3-8

CHAPTER 4 CONNECTING TO THE NETWORK

4.1 CONNECTING THE SEHI TO THE NETWORK....................4-1

4.1.1 Connecting to Network Ports, SEHI-22 and SEHI-24 4-1

4.1.2 Connecting to Network Ports, SEHI-32 and SEHI-34 4-3

4.1.3 Connecting a UTP Segment to an EPIM-T..................4-4

4.1.4 Connecting a Fiber Optic Link Segment to an EPIM-F1, EPIM-F2, or EPIM-F34-5

4.1.5 Connecting a Thin-Net Segment to an EPIM-C ..........4-8

4.1.6 Connecting an AUI Cable to an EPIM-A ...................4-10

4.1.7 Connecting an AUI Cable to an EPIM-X....................4-11

4.2 FINISHING THE INSTALLATION........................................4-12

CHAPTER 5 TROUBLESHOOTING

5.1 INSTALLATION CHECK-OUT ................................................5-1

5.2 USING LANVIEW......................................................................5-2

5.3 USING THE RESET BUTTON.................................................5-4

CHAPTER 6 LOCAL MANAGEMENT

6.1 MANAGEMENT TERMINAL REQUIREMENTS...................6-2

6.1.1 Console Cable Configuration ........................................6-3

6.1.2 Management Terminal Setup Parameters...................6-4

6.2 ACCESSING LOCAL MANAGEMENT....................................6-5

6.3 USING THE LOCAL MANAGEMENT SCREENS..................6-7

6.3.1 The Community Name Table Screen............................6-7

6.3.2 The Configuration Screen...........................................6-10

6.3.3 The Trap Table Screen................................................6-14

6.3.4 The SNMP Tools Screen..............................................6-16

6.3.5 The Device Statistics Screen.......................................6-22

CONTENTS

APPENDIX B TWISTED PAIR WIRING TABLES A-1

vii

CHAPTER 1

INTRODUCTION

Welcome to the Cabletron Systems

and SEHI-34 10BASE-T Intelligent Stackable Hub User’s Guide

reference information for the SEHI-22, 24, 32, and 34.

Note

used throughout this manual when describing features and functions that are common to the SEHI-22, 24, 32, and 34.

1.1 USING THIS MANUAL

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

Chapter 1, describes SEHI features, and concludes with a list of related manuals.

Chapter 2, installation requirements, network guidelines, and SEHI operating speciﬁcations.

Chapter 3, SEHI as a stackable or stand-alone hub.

. This manual explains installation instructions and provides

: The term SEHI (Stackable Ethernet Hub with Intelligence) is

Introduction

Installation Requirements/Speciﬁcations

Installation

, outlines the contents of this manual, brieﬂy

, contains instructions for installing your

SEHI-22, SEHI-24, SEHI-32,

, describes

Chapter 4, SEHI to the network using the various media types.

Chapter 5, LEDs to troubleshoot network problems.

Chapter 6, Management screens and the available commands.

Appendix A, pinouts.

Connecting to the Network

Troubleshooting,

Local Management

Twisted Pair Wiring Tables

describes how to use the LANVIEW

, describes how to use SEHI Local

, explains how to connect the

, lists Punch Down Block

Page 1-1

INTRODUCTION

1.2 GETTING HELP

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

By phone..................(603) 332-9400

Monday-Friday; 8am - 8pm EST

By CompuServe®.....GO CTRON from any ! prompt

By Internet mail...... support@ctron.com

By FTP.....................ctron.com (134.141.197.25)

anonymous

, Password:

your email address

1.3 SEHI OVERVIEW

The 10BASE-T SEHI is an intelligent repeating hub that provides front panel ports for network connections and a rear panel HubSTACK Interconnect Bus port for stackable connections. The SEHI is designed to manage Cabletron Systems’ SEH series of non-intelligent stackable hubs.

Page 1-2

HubSTACK SEHI-24

SEHI-24

HubSTACK SEHI-34

RESET

SEHI-34

10BASE-T HUB

RESET

10BASE-T HUB

WITH

LANVIEW®

RCV LNK

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

PWR CPU

RCV LNK

CLN

WITH

PWR CPU

CLN

WITH

LANVIEW®

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

LANVIEW®

RCV LNK

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

RCV LNK

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

COM

E 2

24X 23X 22X 21X 20X 19X

E 1

12X 11X 10X 9X 8X 7X

E 2

24X 13X

12X 1X

18X 17X 16X 15X 14X 13X

6X 5X 4X 3X 2X 1X

Figure 1-1. The SEHI-24 and SEHI-34

EPIM-2

EPIM-1

SEH INTERCONNECT OUT

EPIM-2

EPIM-1

SEH INTERCONNECT OUT

INTRODUCTION

The SEHI-22/24 and SEHI-32/34 are functionally identical with the exception of the network ports:

•

SEHI-22

•

SEHI-24

•

SEHI-32

pair segments, and one EPIM port.

•

SEHI-34

pair segments, and two EPIM ports.

1.4 SEHI FEATURES

Repeater Functionality

The SEHI fully conforms to the IEEE 802.3 Repeater, AUI, and 10BASE-T speciﬁcations, and provides the ﬂexibility to connect networks using IEEE 802.3, Ethernet Version 1 or Version 2 equipment. The SEHI transmits re-timed data packets, regenerates the preamble, extends fragments, and arbitrates collisions.

, 12 RJ45 network ports and one EPIM port. , 24 RJ45 network ports and two EPIM ports. , one 50 pin Champ connector, providing 12 twisted

, two 50 pin Champ connectors, providing 24 twisted

The SEHI 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 SEHI automatically reconnects the isolated segment to the network.

Polarity Detection and Correction

Each twisted pair port on the SEHI incorporates a Polarity Detection and Correction feature that allows the SEHI to pass data regardless of the polarity of the twisted pair segment’s receive link. We do not recommend operating in this condition. If you discover this condition, remove the segment from the network and wire it correctly. This reduces the potential for problems if equipment changes are made.

Flash EEPROMs

The SEHI uses Flash EEPROMs that allow you to download new and updated ﬁrmware using Cabletron’s Remote LANVIEW/Windows, version 2.3 or later or any device using BOOTP or TFTP protocols.

Page 1-3

INTRODUCTION

LANVIEW LEDs

Cabletron Systems’ LANVIEW Status Monitoring and Diagnostics System is a troubleshooting tool that helps you diagnose power failures, collisions, cable faults, and link problems. The LANVIEW LEDs are conveniently located on the SEHI’s front panel.

Reset Button

The front panel Reset Button lets you reboot the SEHI and initialize the processor.

Local Management

The SEHI’s Local Management lets you manage the SEHI and all its attached segments. It also provides full packet and error statistics for the entire stack, individual device, or individual port. You access Local Management by attaching a DEC VT™ 320 terminal or a PC using VT320 emulation software to the SEHI’s RJ45 COM port.

1.5 STACKABLE CAPABILITIES

The SEHI intelligent hub is designed to manage Cabletron’s SEH series of non-intelligent hubs. The SEHI serves as the logical “top” of the stack. It manages all SEH hubs in the stack providing full packet and error statistics for the entire stack, individual device, or individual port.

You can stack together up to four SEH non-intelligent hubs with one SEHI using Cabletron’s external HubSTACK Interconnect cables. Stackable conﬁgurations let you maintain only one IEEE repeater hop while providing up to 130 Ethernet ports. You can also add or remove hubs from the stack without having to power down.

1.6 REMOTE NETWORK MANAGEMENT CAPABILITIES

You can manage the SEHI remotely by any SNMP network management system. Cabletron Systems offers the following remote management packages:

• Cabletron Systems SPECTRUM

• Cabletron Systems Remote LANVIEW®/Windows™

• Cabletron Systems Remote LANVIEW® for SunNet™ Manager

Page 1-4

INTRODUCTION

1.7 OPTIONAL FEATURES

The following features are not included with the SEHI but can be purchased separately from Cabletron Systems.

Ethernet Port Interface Modules (EPIMs)

EPIMs let you expand your network through a variety of media. Cabletron Systems offers the EPIMs shown in Table 1-1.

Table 1-1. EPIMs

EPIM Media Type Connector

EPIM-A AUI DB15 (Female) EPIM-C 10BASE-2 Thin Coaxial BNC EPIM-T 10BASE-T Unshielded

Twisted Pair EPIM-X Standard Transceiver DB15 (Male) EPIM-F1 Multimode Fiber SMA EPIM-F2 Multimode Fiber ST EPIM-F3 Single Mode Fiber ST

HubSTACK Interconnect Cables

You need Cabletron’s HubSTACK Interconnect cables to stack hubs together. Table 1-2 lists the part number and application for each cable.

Table 1-2. HubSTACK Interconnect Cables

Part

Number

9380110 12" HubSTACK

9380111 18" HubSTACK

Description Application

SEH to SEH connections.

Interconnect Cable

SEHI to SEH connections.

Interconnect Cable

RJ45

Page 1-5

INTRODUCTION

Daughter Board Upgrade Kit

You can upgrade the SEHI-22 and the SEHI-32 to 24 ports using the daughter board upgrade kit. The Cabletron part numbers for the upgrades are:

• SEHI-22: 24PORT-UGKT-E

• SEHI-32: 24PORT-UGKT-E 50P

Rack Mount or Wall Mount Hardware

You can install your SEHI in a 19-inch rack or mount it on a wall. Cabletron offers an accessory package that includes brackets and mounting screws. The part number for the accessory package is SEHI-ACCY-KIT.

1.8 RELATED MANUALS

Use the Cabletron Systems

Guide

provided in this manual. The procedures contained in the

and SEH-32/34 User’s Guide

not repeated in this manual.

to supplement the procedures and other technical data

SEH-22/24 and SEH-32/34 User’s

are referenced where appropriate, but

SEH-22/24

Page 1-6

INSTALLATION REQUIREMENTS/SPECIFICATIONS

CHAPTER 2

INSTALLATION

REQUIREMENTS/SPECIFICATIONS

This Chapter describes cabling requirements, network guidelines , and operating speciﬁcations for the SEHI. Be sure to read this chapter before you install the SEHI. Your network must meet the requirements and conditions speciﬁed in this chapter to obtain satisfactory performance from this equipment. Failure to follow these guidelines could result in poor network performance.

2.1 CABLE SPECIFICATIONS

The SEHI network ports support both Shielded Twisted Pair (STP) or Unshielded Twisted Pair (UTP) cabling. The Ethernet Port Interface Modules (EPIMs) let you expand your network using UTP, STP, Multimode Fiber Optic, Single Mode Fiber Optic, or Thin Coaxial cabling. The rear panel Interconnect Bus port supports Cabletron Systems’ HubSTACK Interconnect cables for stackable applications.

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

2.1.1 HubSTACK Interconnect Cable Requirements

You stack the SEHI to modules in the stack with the SEHI HubSTACK Interconnect cable available only from Cabletron Systems. Refer to Chapter 1 for cable part numbers .The cable attaches to the SEHI’s rear panel bus port.

The rear panel of the SEHI has an Interconnect Bus Out port (male connector) to stack SEH non-intelligent hubs together. You can stack as many as four SEH’s together with one SEHI.

Page 2-1

INSTALLATION REQUIREMENTS/SPECIFICATIONS

2.1.2 UTP and STP Cable Speciﬁcations for the Network Ports and EPIM-T Module

The device at the other end of the twisted pair segment must meet IEEE 802.3 10BASE-T speciﬁcations. When you connect a 10BASE-T Twisted Pair Segment to the SEHI’s 10B ASE-T Twisted Pair Network Ports and EPIM-T module, your network must meet the following requirements:

Length

The IEEE 802.3 10BASE-T standard requires that 10BASE-T devices transmit over a twisted pair wire. However, cable quality largely determines maximum link length. If you use high quality, low attenuation cable, you can achieve link lengths of up to 200 meters. Cable delay limits maximum link length to 200 meters, regardless of the cable type.

Insertion Loss

The maximum insertion loss allowed for a 10BASE-T link is 11.5 dB at all frequencies between 5.0 and 10 MHz. This includes the attenuation of the cables, connectors, patch panels, and reﬂection losses due to impedance mismatches in the link segment.

100

meter (328 foot) link using 22-24 A WG unshielded

Impedance

Cabletron Systems 10BASE-T Twisted Pair products will work on twisted pair cable with 75 to 165 ohms impedance. Unshielded twisted pair cables typically have an impedance of between 85 to 110 ohms.

Shielded twisted pair cables, such as IBM Type 1 cable, can also be used. You should remember that the impedance of IBM Type 1 cable is typically 150 ohms. This increases the signal reﬂection caused by the cable, but since the cable is shielded, this signal reﬂection has little effect on the received signal’s quality due to the lack of crosstalk between the shielded cable pairs.

Jitter

Intersymbol interference and reﬂections can cause jitter in the bit cell timing, resulting in data errors. A 10BASE-T link must not generate more than 5.0 nsec. of jitter. If your cable meets the impedance requirements for a 10BASE-T link, jitter should not be a concern.

Page 2-2

INSTALLATION REQUIREMENTS/SPECIFICATIONS

Delay

The maximum propagation delay of a 10BASE-T link segment must not exceed 1000 nsec. This 1000 nsec. maximum delay limits the maximum link segment length to no greater than 200 meters.

Crosstalk

Crosstalk is caused by signal coupling between the different cable pairs contained within a multi-pair cable bundle. 10BASE-T transceivers are designed so that the user does not need to be concerned about cable crosstalk, provided the cable meets all other requirements.

Noise

Noise can be caused by either crosstalk or externally induced impulses. Impulse noise ma y 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-related data errors are suspected, it may be necessary to either reroute the cable or eliminate the source of the impulse noise.

Temperature

Multi-pair PVC 24 AWG telephone cables typically have an attenuation of approximately 8 to 10 dB/100m at 20° C (78° F). The attenuation of PVC insulated cable varies signiﬁcantly with temperature. At temperatures greater than 40° C (104° F), we strongly recommend that you use plenum-rated cables to ensure that cable attenuation remains within speciﬁcation.

Page 2-3

INSTALLATION REQUIREMENTS/SPECIFICATIONS

2.1.3 Multimode Fiber Optic Cable Speciﬁcations for the

EPIM-F1 and EPIM-F2 Modules

Table 2-1 shows Multimode Fiber Optic Cable speciﬁcations for the EPIM-F1 and EPIM-F2 modules.

Table 2-1. Multimode Fiber Optic Cable Specifications

Cable Type Attenuation Maximum Cable Length

50/125 µm 13.0 dB or less The maximum allowable fiber

62.5/125 µm 16.0 dB or less 100/140 µm 19.0 dB or less

Attenuation

You must 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. Table 2-1 shows the attenuation for each Multimode cable type.

optic cable length is 2 km (2187.2 yards). However, IEEE 802.3 specifications allow for a maximum of 1 km (1093.6 yards).

Fiber Optic Budget and Propagation Delay

When determining the maximum ﬁber optic cable length, the ﬁber optic budget delay and total network propagation should be calculated and taken into consideration 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-line splices, and ﬁber optic connectors.

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 entire network is 25.6 µsec, if the total propagation delay between any two nodes on the network exceeds 25.6 µsec, then bridges should be used.

Page 2-4

INSTALLATION REQUIREMENTS/SPECIFICATIONS

2.1.4 Single Mode Fiber Optic Cable Speciﬁcations for the EPIM-F3 Module

Table 2-2 shows Single Mode Fiber Optic Cable speciﬁcations for the EPIM-F3.

Table 2-2. Single Mode Fiber Optic Cable Specifications

Cable Type Attenuation Maximum Cable Length

8/125-12/125 µm 10.0 dB or less The maximum allowable fiber

optic cable length is 5 km (3.1 miles) with bridges at each segment end. However, IEEE 802.3 FOIRL specifications specify a maximum of 1 km (1093.6 yards).

Attenuation

You must test the ﬁber optic cable with a ﬁber optic attenuation test set adjusted for an 1300 nm wavelength. This test veriﬁes that the signal loss in a cable is 10.0 dB or less for any given single mode ﬁber optic link.

Fiber Optic Budget and Propagation Delay

Fiber optic budget is the combination of the optical loss due to the ﬁber optic cable, in-line splices, and ﬁber optic connectors. When determining the maximum ﬁber optic cable length, the ﬁber optic budget (total loss of 10.0 dB or less between stations) and total network propagation delay should be calculated and considered before ﬁber optic cable runs are incorporated in any network design.

Page 2-5

INSTALLATION REQUIREMENTS/SPECIFICATIONS

2.1.5 Thin-Net Network Requirements for the EPIM-C Module

When you connect a thin-net segment to the SEHI (via an EPIM-C), your network must meet the following requirements:

Cable Type

50 ohm RG-58A/U type coaxial cable must be used when making up a thin-net cable segment.

Length

The thin-net segment must be no longer than 185 meters.

Terminators

A 50 ohm terminator must be connected to the far end of each thin-net segment.

Connectors

A maximum of 29 tee-connectors may be used throughout the length of cable segment for host connections. If an excessive number of barrel connectors are used within the cable segment, such as ﬁnished wall plates with BNC feed-throughs, then a reduced number of host connections may be required. For special network design, contact Cabletron Systems Technical Support.

Grounding

For safety, ground only one end of a thin-net segment. Do NOT connect EPIM BNC ports to earth ground.

Warning: Connecting a thin-net segment to earth ground at more than one point could produce dangerous ground currents.

Page 2-6

INSTALLATION REQUIREMENTS/SPECIFICATIONS

2.1.6 AUI Cable Requirements for the EPIM-A

and EPIM-X Modules

When you connect an external network segment to the SEHI (via an EPIM-A or EPIM-X), the AUI cable must meet the following requirements:

AUI Cable

The AUI cable connecting the module to a device must be IEEE 802.3 type cable.

Length

The AUI Cable must not exceed 50 meters in length. If 28 AWG thin ofﬁce drop AUI cable is used, then the maximum cable length is limited to 50 feet (15.24 meters).

Grounding

The connector shell of the EPIM-A and the EPIM-X are connected to ground.

2.2 NETWORK PORT SPECIFICATIONS

The SEHI-22 and SEHI-24 network ports are shielded RJ45 connectors that support both STP and UTP cabling. The SEHI-32 and SEHI-34 provide a 50 pin Champ style connector for network connections. The following sections provide speciﬁcations for each SEHI model.

Page 2-7

INSTALLATION REQUIREMENTS/SPECIFICATIONS

2.2.1 SEHI-22 and SEHI-24 Network Port Speciﬁcations

The SEHI-22 and SEHI-24 provide RJ45 connections for network connections. Figure 2-1 shows the RJ45 pinouts.

1 2 3 4 5 6 7 8

12X

11X

10X

1. Receive + 5. Not Used

2. Receive - 6. Transmit -

3. Transmit + 7. Not Used

4. Not Used 8. Not Used

Figure 2-1. RJ45 Network Ports

2.2.2 SEHI-32 and SEHI-34 Network Port Speciﬁcations

The SEHI-32 and SEHI-34 provide 50 pin Champ connectors for network connections as shown in Figure 2-2. Table 2-3 shows the pinouts for the Champ connector.

24X 13X

Page 2-8

12X

Figure 2-2. SEHI-34 Network Ports

INSTALLATION REQUIREMENTS/SPECIFICATIONS

Table 2-3. Champ Connector Pinouts

50 Pin Champ Connector

Pin Signal Wire Color Pin Signal Wire Color

1 RX 1- Blue/White 26 RX 1+ White/Blue 2 TX 1- Orange/White 27 TX 1+ White/Orange 3 RX 2- Green/White 28 RX 2+ White/Green 4 TX 2- Brown/White 29 TX 2+ White/Brown 5 RX 3- Gray/White 30 RX 3+ White/Gray 6 TX 3- Blue/Red 31 TX 3+ Red/Blue 7 RX 4- Orange/Red 32 RX 4+ Red/Orange 8 TX 4- Green/Red 33 TX 4+ Red/Green 9 RX 5- Brown/Red 34 RX 5+ Red/Brown 10 TX 5- Gray/Red 35 TX 5+ Red/Gray 11 RX 6- Blue/Black 36 RX 6+ Black/Blue 12 TX 6- Orange/Black 37 TX 6+ Black/Orange 13 RX 7- Green/Black 38 RX 7+ Black/Green 14 TX 7- Brown/Black 39 TX 7+ Black/Brown 15 RX 8- Gray/Black 40 RX 8+ Black/Gray 16 TX 8- Blue/Yellow 41 TX 8+ Yellow/Blue 17 RX 9- Orange/Yellow 42 RX 9+ Yellow/Orange 18 TX 9- Green/Yellow 43 TX 9+ Yellow/Green 19 RX 10- Brown/Yellow 44 RX 10+ Yellow/Brown 20 TX 10- Gray/Yellow 45 TX 10+ Yellow/Gray 21 RX 11- Blue/Violet 46 RX 11+ Violet/Blue 22 TX 11- Orange/Violet 47 TX 11+ Violet/Orange 23 RX 12- Green/Violet 48 RX 12+ Violet/Green 24 TX 12- Brown/Violet 49 TX 12+ Brown 25 N/C Gray/Violet 50 N/C Violet/Gray

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INSTALLATION REQUIREMENTS/SPECIFICATIONS

2.3 EPIM SPECIFICATIONS

EPIMs let you connect the SEHI to the main network using different media types. Cabletron Systems offers a variety of EPIMs. The following sections explain speciﬁcations for each EPIM.

2.3.1 EPIM-T

The EPIM-T is an RJ45 connector supporting UTP cabling. It has an internal Cabletron Systems TPT-T™ 10BASE-T Twisted Pair Transceiver.

The slide switch on the EPIM-T determines the cross-over status of the cable pairs. If the switch is on the X side, the pairs are internally crossed over. If the switch is on the = side, the pairs are not internally crossed over. Figure 2-3 shows the pinouts for the EPIM-T in both cross-over positions.

Position X (crossed over)

1. RX+

2. RX-

3. TX+

4. NC

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5. NC

6. TX-

7. NC

8. NC

Position = (not crossed over)

1. TX+

2. TX-

3. RX+

4. NC

5. NC

6. RX-

7. NC

8. NC

Figure 2-3. EPIM-T Pinouts

INSTALLATION REQUIREMENTS/SPECIFICATIONS

2.3.2 EPIM-F1 and EPIM-F2

The EPIM-F1 and EPIM-F2 shown in Figure 2-4 support Multimode Fiber Optic cabling. Each EPIM has an internal Cabletron Systems FOT-F™ Fiber Optic Transceiver. The EPIM-F1 is equipped with SMA Connectors and the EPIM-F2 is equipped with ST Connectors. Speciﬁcations for the EPIMs are listed below.

Figure 2-4. EPIM-F1 and EPIM-F2

Parameter Typical Worst Worst Case Typical

Value Case Budget Budget

Receive Sensitivity: -30.5 dBm -28.0 dBm — —

Peak Input Power: -7.6 dBm -8.2 dBm — —

Transmitter Power

50/125 µm fiber: -13.0 dBm -15.0 dBm 13.0 dB 17.5 dB

62.5/125 µm fiber: -10.0 dBm -12.0 dBm 16.0 dB 20.5 dB 100/140 µm fiber: -7.0 dBm -9.0 dBm 19.0 dB 23.5 dB Error Rate: Better than 10

-10

Note: 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, then 3 dBm must be added to the measurement to correctly compare those measured values to the values listed (i.e. -30.5 dBm peak=-33.5 dBm average).

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INSTALLATION REQUIREMENTS/SPECIFICATIONS

2.3.3 EPIM-F3

The EPIM-F3 shown in Figure 2-5 supports Single Mode Fiber Optic cabling. It has an internal Cabletron Systems FOT-F™ Fiber Optic Transceiver and is equipped with ST Connectors. Specifications for the EPIM-F3 are listed below.

Figure 2-5. EPIM-F3

Note: Transmitter Power decreases as temperatures rise and increases as temperatures fall. Use the Output Power Coefficient to calculate increased or decreased power output for your operating environment. For example, the typical power output at 25 dBm. For a 4° C temperature increase, multiply the typical coefficient (-0.15 dBm) by four and add the result to typical output power (4 x -0.15 dBm + -16.4 = -17.0).

C is -16.4

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INSTALLATION REQUIREMENTS/SPECIFICATIONS

Maximum Sensitivity (-36.0)

Receive

Sensitivity

Maximum

Receive

Input Power

Typical Sensitivity (-31.0) Minimum Sensitivity (-30.0)

Minimum Receive Input (-9.72)

Typical Receive Input (-7.5) Maximum Receive Input (-6.99)

Transmitter Power*

(At 25°C into

8.3/125µm fiber)

-40 -35 -30 -25 -20 -15 -10 -5 0

dBm

Less Power

* Transmit Power Typical Power Minimum Power Maximum Power Coefficient (See Note Below)-0.15dBm/ °C  -0.12 dBm/ °C-0.18 dBm/ °

Maximum Transmit Power (-12.0)

Typical Transmit Power (-15.5)

Minimum Transmit Power (-21.0)

More Power

Parameter Typical Minimum Maximum

Transmitter Peak Wave Length 1300 nm 1270 nm 1330 nm

Spectral Width 60 nm - 100 nm

Rise Time/ 3.0 nsec 2.7 nsec 5.0 nsec Fall Time 2.5 nsec 2.2 nsec 5.0 nsec

Duty Cycle 50.1% 49.6% 50.7% Bit Error Rate: Better than 10

-10

Note: The transmitter power levels given above are Peak Power Levels after optical overshoot. You must use a Peak Power Meter to correctly compare the values given above to those measured on any particular port. If you are measuring power levels with an Average Power Meter, add 3 dBm to the average power measurement to correctly compare the average power values measured to the values listed above (i.e. -33.5 dBm average + 3 dB = -30.5 dBm peak).

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INSTALLATION REQUIREMENTS/SPECIFICATIONS

2.3.4 EPIM-C

The EPIM-C supports thin-net coaxial cabling and is equipped with an internal Cabletron Systems TMS-3™ Transceiver. You can use the TERM switch on the front of the EPIM-C to set the internal 50 Ohm terminator. This eliminates the need to connect the port to a tee-connector and terminator. Figure 2-6 shows the setting for the terminator switch.

Internal Termination Switch = On (internally terminated) = Off (need external termination)

Figure 2-6. EPIM-C

Connector Type

BNC receptacle, with gold center contact, for use with BNC type teeconnectors and RG-58 thin-net cable.

Grounding

For safety, only one end of a thin-net segment should be connected to earth ground. Connection to earth ground at more than one point on the segment may cause dangerous ground currents.

The BNC port of the Coaxial Interface Modules is not connected to earth ground.

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