Cabletron Systems SEH-34, SEH-24, SEH-32 User Manual

SEH-22, SEH-24, SEH-32, AND SEH-34

The Complete Networking Solution™

10BASE-T STACKABLE HUB

USER’S GUIDE

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

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.

© Copyright February 1994 by:
Cabletron Systems, Inc.
P.O. Box 5005, Rochester, NH 03867-0505

All Rights Reserved
Printed in the United States of America

Order Number: 9030903-01 February 94

SPECTRUM®,
MicroMMAC™ are trademarks of Cabletron Systems, Inc.

IBM

is a registered trademark of International Business Machines Corporation.

CompuServe
DEC, VT200
Ethernet
Windows

LANVIEW®,

is a registered trademark of CompuServe, Inc.

, and

VT300

is a trademark of Xerox Corporation.
is a registered trademark of Microsoft Corporation.

Remote LANVIEW® ,

are trademarks of Digital Equipment Corporation.

Printed On

HubSTACK™ , and

Recycled Pa

i

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.

ii

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
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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

iv

CONTENTS

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 SEH OVERVIEW.......................................................................1-2

1.4 SEH FEATURES .......................................................................1-3

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

1.6 OPTIONAL FEATURES ........................................................... 1-4

1.7 RELATED MANUALS ..............................................................1-5

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 SEH-22 and SEH-24 Network Port Specifications......2-8

2.2.2 SEH-32 and SEH-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 TRANSCEIVER REQUIREMENTS.......................................2-16

2.5 OPERATING SPECIFICATIONS........................................... 2-16

EPIM-F1/F2.................................................................2-11

v

CONTENTS

CHAPTER 3 INSTALLATION

3.1 UNPACKING THE SEH............................................................3-1

3.2 INSTALLING THE SEH............................................................3-1

3.2.1 Stacking the SEH..........................................................3-2

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

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

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

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

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

CHAPTER 4 CONNECTING TO THE NETWORK

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

4.1.1 Connecting Network Ports SEH-22 and SEH-24.........4-1

4.1.2 Connecting Network Ports SEH-32 and SEH-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

APPENDIX B TWISTED PAIR WIRING TABLES A-1

vi

CHAPTER 1

INTRODUCTION

INTRODUCTION

Welcome to the Cabletron Systems

SEH-34 10BASE-T Stackable Hub User’s Guide

explains installation instructions and provides reference information
for the SEH-22, 24, 32, and 34.

Note

: The term SEH (Stackable Ethernet Hub) is used throughout this
manual when describing features and functions that are common to the
SEH-22, 24, 32, and 34.

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 SEH. A general working knowledge of Ethernet and IEEE 802.3
type data communications networks and their physical layer
components will be helpful when installing the SEH.

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

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

Introduction

Installation Requirements/Specifications

, outlines the contents of this manual, briefly

SEH-22, SEH-24, SEH-32, and

. This manual

, describes

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

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

Chapter 5,
LEDs to troubleshoot network problems.

Appendix A,
for Punch Down Block applications.

Installation

Connecting to the Network

Troubleshooting,

Twisted Pair Wiring Tables

, contains instructions for installing your SEH

describes how to use the LANVIEW

, explains how to connect the

, contains wiring pinouts

Page 1-1

INTRODUCTION

1.2 GETTING HELP

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

By phone......................... [phone]

Monday-Friday; 8am - 8pm EST

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

By Internet mail............. [e-mail]

1.3 SEH OVERVIEW

The 10BASE-T SEH is a non-intelligent repeating hub that provides
front panel ports for network connections and rear panel HubSTACK
Interconnect Bus ports for stackable connections.

HubSTACK 10BASE-T HUB WITH LANVIEW®
SEH-24

PWR
MGMT
CLN

RCV
LNK

RCV
LNK

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

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

SEH-24 10BASE-T HUB WITH LANVIEW®

OUT

SEH INTERCONNECT

HubSTACK 10BASE-T HUB WITH LANVIEW®
SEH-34

PWR
MGMT
CLN

RCV
LNK

RCV
LNK

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

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

SEH-34 10BASE-T HUB WITH LANVIEW®

OUT

SEH INTERCONNECT

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

E
2

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

E
1

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

IN

E
2

24X 13X

E

12X 1X

1

IN

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

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

EPIM-2

EPIM-1

EPIM-2

EPIM-1

Page 1-2

INTRODUCTION

You can stack together up to five SEH hubs using Cabletron Systems’
external HubSTACK Interconnect cables. If you want to add
management to the stack, Cabletron Systems offers the MicroMMAC
and the SEHI intelligent hubs. You can stack up to four SEHs with
one intelligent hub. Stackable configurations let you maintain only
one IEEE repeater hop while providing up to 130 Ethernet ports.

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

•

SEH-22

•

SEH-24

•

SEH-32

pair segments, and one EPIM port.

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

SEH-34

•
pair segments, and two EPIM ports.

1.4 SEH FEATURES

Repeater Functionality

The SEH 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 SEH transmits re-timed data packets, regenerates the
preamble, extends fragments, and arbitrates collisions.

The SEH automatically partitions problem segments, and reconnects
repaired segments to the network. This feature minimizes the impact
on network operation 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 that allows the SEH 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.

, two 50 pin Champ connectors, providing 24 twisted

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 front panel.

1.5 STACKABLE CAPABILITIES

The SEH is a non-intelligent hub designed to be managed by either
the Cabletron Systems SEHI intelligent hub or the Cabletron Systems
MicroMMAC intelligent hub. Intelligent hubs serve as the logical “top”
of the stack. They manage 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 five SEHs for a
non-managed stack or one intelligent hub and up to four SEHs for a
managed stack. You can also add or remove hubs from the stack
without having to power down.

1.6 OPTIONAL FEATURES

The following features are not included with the SEH 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 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

Page 1-4

RJ45

INTRODUCTION

Daughter Board Upgrade Kit

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

• SEH-22: 24PORT-UGKT-E

• SEH-32: 24PORT-UGKT-E 50P

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

Rack Mount or Wall Mount Hardware

You can install your SEH 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
SEH-ACCY-KIT.

1.7 RELATED MANUALS

Us the

MicroMMAC-22E/24E and MicroMMAC-32E/34E User’s Guide

supplement the procedures and other technical data provided in this
manual. The procedures contained in these manuals are referenced
where appropriate, rather than repeated in this manual.

SEHI-22/24 and SEHI-32/34 User’s Guide

Description Application

SEH to SEH connections.

Interconnect Cable

SEHI or MicroMMAC to

Interconnect Cable

SEH connections.

and the

to

Page 1-5

INSTALLATION REQUIREMENTS/SPECIFICATIONS

CHAPTER 2

INSTALLATION

REQUIREMENTS/SPECIFICATIONS

This chapter describes network guidelines, power requirements, and
operating specifications for the SEH. Be sure to read this chapter
before you install the SEH. 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 SEH 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 Ports support 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 connect units in the stack with HubSTACK Interconnect cables.
Refer to Chapter 1 for cable part numbers. The cables attach to the
SEH’s rear panel bus ports.

The rear panel of the SEH has an SEH Interconnect Bus Out Port
(male connector) and an SEH Interconnect Bus In Port (female
connector). The bus supports five stackable devices.

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 SEH’s 10BASE-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.

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 2-5

INSTALLATION REQUIREMENTS/SPECIFICATIONS

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

When you connect a thin-net segment to the SEH (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 SEH (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 SEH-22 and SEH-24 network ports are shielded RJ45 connectors
that support both STP and UTP cabling. The SEH-32 and SEH-34
provide a 50 pin Champ style connector for network connections. The
following sections provide specifications for each SEH model.

Page 2-7

INSTALLATION REQUIREMENTS/SPECIFICATIONS

2.2.1 SEH-22 and SEH-24 Network Port Specifications

The SEH-22 and SEH-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 SEH-32 and SEH-34 Network Port Specifications

The SEH-32 and SEH-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. SEH-34 Network Ports

1X

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

Page 2-9

INSTALLATION REQUIREMENTS/SPECIFICATIONS

2.3 EPIM SPECIFICATIONS

EPIMs let you connect the SEH 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

Page 2-10

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/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).

Page 2-11

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

Page 2-12

INSTALLATION REQUIREMENTS/SPECIFICATIONS

C

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).

Page 2-13

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.

Page 2-14

INSTALLATION REQUIREMENTS/SPECIFICATIONS

2.3.5 EPIM-A and EPIM-X (AUI Port)

The EPIM-A is a DB15 female connector used to attach segments to
an external transceiver. The EPIM-X is equipped with dual internal
transceivers. It has a DB15 male connector used to attac h segments to
an AUI cable. Figure 2-7 shows both modules.

Figure 2-7. The EPIM-A and EPIM-X

DB15 Pinouts

Pin 1 Logic Ref. 9 Collision -

2 Collision + 10 Transmit ­3 Transmit 11 Logic Ref.
4 Logic Ref. 12 Receive ­5 Receive + 13 Power (+12Vdc)
6 Power Return 14 Logic Ref.
7 No Connection 15 No Connection

Connector Shell: Protective Ground

Page 2-15

INSTALLATION REQUIREMENTS/SPECIFICATIONS

2.4 TRANSCEIVER REQUIREMENTS

When you connect an external network segment, via a transceiver, to
the SEH with an EPIM-A, the following requirements must be met:

• The transceiver or Ethernet Device to which the module will be
connected must meet IEEE 802.3 standards, and/or Ethernet
Version 1.0 or Version 2.0 standards.

• The Signal Quality Error (SQE) test function on the
transceiver must be disabled if you connect it to a repeater or
to an Ethernet V ersion 1.0 device . In addition, some Version 2.0
equipment does not support the SQE test. Devices that do not
support SQE test interpret the SQE test pulse as a collision.

2.5 OPERATING SPECIFICATIONS

This section describes the operating specifications for the SEH.
Cabletron Systems reserves the right to change these specifications at
any time without notice.

GENERAL

Delay Times (Start of Packets):

Twisted Pair to EPIM- A 1.10 microseconds
Twisted Pair to Twisted Pair 1.00 microseconds
EPIM-A to Twisted Pair 1.00 microseconds

Delay Times (JAM):

Twisted Pair to EPIM-A 960 nanoseconds

Preamble:

Input: Minimum of 40 bits required
Output: 64 bits min. (last 2 bits are 1, 1)

Page 2-16

INSTALLATION REQUIREMENTS/SPECIFICATIONS

JAM Output: Collisions are propagated

through the network using the
JAM signal of an alternating
pattern of 1's and 0's in
accordance with 802.3
specifications for a repeater unit.

Fragment Extension: Packet fragments are extended to

a minimum of 96 bits using the
JAM [1,0].

Fault Protection: Each segment will disconnect

itself from the other segments if
32 consecutive collisions occur, or
if the collision detector of a
segment is on for longer than
approximately 110 µs. This fault
protection will reset
automatically after one packet is
transmitted/received onto the
fault protected segment without
causing a collision.

POWER SUPPLY REQUIREMENTS

Note: The SEH has a universal power supply. This unit allows you to
use an input power from 90 to 264 VAC, 47-63 Hz.

The power supply has two outputs of +5 volts and +12 volts. The
maximum output power is 20 watts and the minimum efficiency is
65% under all conditions of line at full load. The minimum and
maximum load current from each output is shown below.

Output

+5 V olts 0.50 Amps 3.0 Amps 15 W atts
+12 V olts 0.05 Amps 1.0 Amps 12 Watts

Min. Load Max. Load Max Power

Page 2-17

INSTALLATION REQUIREMENTS/SPECIFICATIONS

ENVIRONMENTAL REQUIREMENTS

Operating Temperature: +5° to +50° C
Non-operating Temperature: -30° to +90° C
Operating Humidity: 5 to 95% (non-condensing)

SAFETY

This unit meets the safety requirements of UL 1950, CSA C22.2
No. 950, and EN 60950; the EMI requirements of FCC Class A and
EN 55022 Class A; and the EMC requirements of EN 50082-1.

Warning: It is the responsibility of the person who sells the system to
which the SEH will be a part to ensure that the total system meets
allowed limits of conducted and radiated emissions.

PHYSICAL

Dimensions: 2.8H x 17.0W x 8.0D inches

(7.2 x 43.6 x 20.5 cm)
Weight: 4.9 lbs
Predicted MTBF: SEH-22/32: 753,629 hours

SEH-24/34: 847,921 hours

Page 2-18

INSTALLATION

CHAPTER 3

INSTALLATION

This chapter outlines the procedure for installing your SEH and
connecting it to a network. You can install the SEH as a stackable or
stand-alone device. Ensure that your network meets the guidelines
and requirements outlined in Chapter 2, Installation

Requirements/Specifications, before installing the SEH.

3.1 UNPACKING 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.

3. Remove the SEH from the protective plastic bag and set it aside to

prevent damage.

4. Visually inspect the SEH. If there are any signs of damage, contact

Cabletron Systems Technical Support immediately.

3.2 INSTALLING THE SEH

You can install the SEH to your network as a stackable or stand-alone
hub. If you want to install the SEH on a wall or a 19-inch rack,
Cabletron Systems offers an accessory kit that includes Rack Mount
Brackets, Wall Mount Brackets, Mounting Screws, and a Strain Relief
Bracket. The accessory kit is not included with the SEH, but you can
purchase it separately from Cabletron Systems as Part Number
SEH-ACCY-KIT.

Page 3-1

INSTALLATION

Free-standing and shelf installations must be within in reach of the
network cabling and meet the requirements listed below:

• A single phase 120Vac, 15A, grounded power receptacle must

be located within 7 feet of the location.

• If you use a shelving unit, it must be able to support 30 pounds

of static weight for each device in the stack.

• The temperature for the selected location must be maintained

between 5° and 50°C, and fluctuate less than 10°C per hour.

The following sections provide instructions for stacking the SEH or
installing it as a stand-alone device. Select one of the following
subsections and perform the steps that are applicable to your
installation needs.

3.2.1 Stacking the SEH

The rear panel of the SEH has an SEH Interconnect Bus In Port
(female connector) and an SEH Interconnect Bus Out Port (male
connector). You daisy chain units together using Cabletron Systems’
HubSTACK Interconnect cables. Table 3-1 describes each cable.

Table 3-1. HubSTACK Interconnect Cables

Part

Number

9380110 12" HubSTACK

9380111 18" HubSTACK

Page 3-2

Description Application

Interconnect Cable

Interconnect Cable

SEH to SEH connections.

SEHI or MicroMMAC to
SEH connections.

INSTALLATION

To stack SEHs together, refer to Figure 3-1 and perform the following
steps:

1. Attach the SEH HubSTACK Interconnect cable to the bus port

labeled “OUT” on the rear panel of the SEH.

2. Attach the other end of SEH HubSTACK Interconnect cable to the

bus port labeled “IN” on the rear panel of the SEH next in the stack.

3. Attach up to four SEH hubs in the stack repeating steps 1 and 2.

SEH-24 10BASE-T HUB WITH LANVIEW®

SEH INTERCONNECT

OUT

SEH-24 10BASE-T HUB WITH LANVIEW®

SEH INTERCONNECT

OUT

SEH-24 10BASE-T HUB WITH LANVIEW®

SEH INTERCONNECT

OUT

SEH-24 10BASE-T HUB WITH LANVIEW®

SEH INTERCONNECT

OUT

SEH-24 10BASE-T HUB WITH LANVIEW®

SEH INTERCONNECT

OUT

IN

IN

IN

IN

IN

SEH-24 10BASE-T HUB WITH LANVIEW®

SEH INTERCONNECT

OUT

SEH-24 10BASE-T HUB WITH LANVIEW®

SEH INTERCONNECT

OUT

SEH-24 10BASE-T HUB WITH LANVIEW®

SEH INTERCONNECT

OUT

SEH-24 10BASE-T HUB WITH LANVIEW®

SEH INTERCONNECT

OUT

SEHI-24 10BASE-T HUB WITH LANVIEW®

IN

IN

IN

IN

SEH INTERCONNECT
OUT

Figure 3-1. Stacking the SEH

To stack an SEH to an SEHI, refer to Figure 3-1 and perform the
following steps:

1. Attach the SEHI HubSTACK Interconnect cable to the bus port

labeled “OUT” on the rear panel of the SEHI.

2. Attach the other end of SEHI HubSTACK Interconnect cable to the

bus port labeled “IN” on the rear panel of the SEH next in the stack.

Page 3-3

INSTALLATION

If you disconnect one end of a HubSTACK Interconnect cable and
leave the other end attached to the hub, ensure that you disconnect
the cable from the “OUT” port as shown in Figure 3-2. This ensures
that the HubSTACK Interconnect cable is terminated properly.

Disconnect SEH and SEHI Interconnect Cables

SEH-24

SEH-24

SEHI-24

10BASE-T HUB

OUT

10BASE-T HUB

OUT

10BASE-T HUB

at the "OUT" Port.

WITH

LANVIEW®

SEH INTERCONNECT

WITH

LANVIEW®

SEH INTERCONNECT

WITH

LANVIEW®

IN

IN

SEH INTERCONNECT
OUT

Figure 3-2. Disconnecting the HubSTACK Interconnect Cable

3.2.2 Attaching the Strain Relief Bracket

Attach the strain relief bracket to the front of the SEH as follows:

1. Locate the strain relief bracket and four 8-32 x 3/8" screws from the
SEH-ACCY-KIT package.

Warning: Use of longer screws may cause damage to the unit or
electrical shock.

2. Attach the strain relief bracket to the bottom of the SEH as shown
in Figure 3-3.

HubSTACK 10BASE-T HUB WITH LANVIEW®
SEH-24

Figure 3-3. Attaching the Strain Relief

Page 3-4

INSTALLATION

3.2.3 Rack Mounting the SEH

Refer to Figure 3-4 and perform these steps to install the SEH in a
19-inch rack.

1. Remove four cover screws (two from each side) located along the

front edges of each side of the SEH.

2. Using the four cover screws removed in step 1, attach the rack

mounting brackets to each end of the SEH.

Rack Mounting

Brackets (2)

HubSTACK 10BASE-T HUB WITH LANVIEW®
SEH-24

Screws (4)

Figure 3-4. Installing the Rack Mount Brackets

3. With the mounting brackets installed, position the SEH between

the vertical frame members of the 19-inch rack and fasten it
securely with the mounting screws as shown in Figure 3-5.

19-Inch Rack

HubSTACK

10BASE-T HUB

WITH

SEH-24

LANVIEW®

Screws (4)

Figure 3-5. Installing the SEH in the Rack

Page 3-5

INSTALLATION

3.2.4 Wall Mounting the SEH

When you wall mount the SEH, the cable connections must face down.
Refer to Figure 3-6 and perform the following steps to wall mount the
SEH.

Note: 1/4-inch Molly screw anchors for wall mounting are not
included with the SEH-ACCY-KIT package.

1. Use the supplied screws to attach the wall mounting brackets to
the bottom of the SEH as shown in Figure 3-6. There are two
brackets, one for each side.

Molly Screw
Anchors

Bracket Screws

Wall Mounting Bracket

Molly Screws

Figure 3-6. Installing the Wall Mounting Brackets

2. Select the wall location for the SEH within 7 feet of a power outlet.

Warning: There is a potential SHOCK HAZARD if there is electrical
wiring within the wall that interferes with drilling for pilot holes. Select
a wall location where drilling pilot holes for the Molly screws will not
come in contact with electrical wiring in the wall.

Page 3-6

INSTALLATION

3. You will need a pencil for this step. With the wall mounting

brackets attached to the SEH, position the SEH against the wall
where it will be permanently mounted with the network port facing
down. Use the pencil to mark the wall location for the four pilot
holes.

4. Set the SEH aside and carefully drill four 1/4" pilot holes, one for

each of the Molly screw anchors and insert the four Molly screw
anchors into the holes just drilled.

5. Tighten each of the anchor screws until the anchor expands holding

the anchor firmly in the wall, then remove the screws completely.

6. Position the SEH on the wall over the anchors and reinstall the

four anchor screws to attach the SEH to the wall, as shown in
Figure 3-6. Tighten the four anchor screws.

3.2.5 Free-Standing Installation

For a free-standing shelf or tabletop installation, locate the SEH
within 7 feet of its power source and with an unrestricted free surface
area 21 inches wide, 18 inches deep and 6 inches high, as shown in
Figure 3-7.

6 IN.

18 IN.

HubSTACK 10BASE-T HUB WITH LANVIEW®
SEH-24

21 IN.

Figure 3-7. Shelf or Table-top Installation

7 FT.

Page 3-7

INSTALLATION

3.3 CONNECTING THE SEH TO THE POWER SOURCE

Note: The SEH has a universal power supply. This allows you to
connect the SEH to power sources from 90 Vac to 264 Vac, 47-63 Hz.

To connect the SEH to the power source:

1. Plug the power cord into the back panel of the SEH.

2. Plug the other end of the power cord into a grounded wall outlet.

3. Verify that the PWR LED is on, this indicates that the SEH is
receiving power.

Page 3-8

CONNECTING TO THE NETWORK

CHAPTER 4

CONNECTING TO THE NETWORK

This chapter outlines the procedure for connecting your SEH to a
network. Ensure that your network meets the guidelines and
requirements outlined in Chapter 2, Installation Requirements/

Specifications, before installing the SEH.

4.1 CONNECTING THE SEH TO 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 your SEH:

• Network Ports SEH-22/24 4.1.1

• Network Ports SEH-32/34 4.1.2

• EPIM-T 4.1.3

• EPIM-F1, F2, F3 4.1.4

• EPIM-C 4.1.5

• EPIM-A 4.1.6

• EPIM-X 4.1.7

Prior to connecting the network cabling check the connectors for the
proper pinouts as shown in Chapter 2.

4.1.1 Connecting Network Ports SEH-22 and SEH-24

You attach unshielded twisted pair segments to the RJ45 Network
Ports on the front panel of the SEH. Each twisted pair 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 and if this condition is
discovered, the segment should be removed from the network and
wired correctly by a technician.

Page 4-1

CONNECTING TO THE NETWORK

To connect twisted pair segments to the SEH:

1. Insert the RJ45 connector from each twisted pair segment into the
desired network port on the SEH. See Figure 4-1.

EPIM-2

LNK

EPIM-T

13X

14X

15X

16X

17X

18X

1X

2X

3X

4X

5X

6X

LNK

EPIM-T

EPIM-1

Figure 4-1. SEH-22/24 Network Ports

2. Check that the applicable LNK LED for the port is on. If the LED
is not on, perform each of the following steps until it is:

a. Check that the 10BASE-T device 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. Check the cable for continuity.

c. Check that the twisted pair connection meets dB loss and cable

specifications outlined Chapter 2.

If a link still has not been established, contact Cabletron Systems
Technical Support.

Page 4-2

CONNECTING TO THE NETWORK

4.1.2 Connecting Network Ports SEH-32 and SEH-34

The SEH-32 has a 50-pin Champ connector, while the SEH-34 has two
50-pin Champ connectors. This configuration of the SEH allows you to
run a 50-pin feeder cable from the SEH to a punch down block. Each
Champ connector supports 12 10BASE-T, twisted pair segments.

Note: Refer to Appendix A for information about wiring the SEH to a
punch down block.

To connect the SEH into an existing twisted pair wiring system:

1. Connect a 50-pin feeder cable to the Champ connector on the SEH

as shown in Figure 4-2.

EPIM-2

LNK

EPIM-T

13X

24X

1X

12X

LNK

EPIM-T

EPIM-1

Figure 4-2. SEH-32/34 Network Ports

2. Attach the feeder cable to the punch down block, or patch panel.

In most cases, you can connect the feeder cable directly to a
Champ connector located on the punch down block. If not, you
must wire the feeder cable to the punch down block using the
punch down information in Appendix A.

3. At the device end of a segment, attach the segment to a 10BASE-T

compliant Ethernet device.

Page 4-3

CONNECTING TO THE NETWORK

4. Check that the link LED on the 10BASE-T Ethernet device and the
applicable LNK LED on the SEH are on. If the LEDs are not on,
perform each of the following steps until the LEDs are on:

a. Check that the 10BASE-T device and the SEH have power.
b. Verify the cabling between the SEH and the 10BASE-T device.
c. Check the cable for continuity.

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

4.1.3 Connecting a UTP Segment to an EPIM-T

Before connecting a segment to the EPIM-T, 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 the
EPIM-T to internally cross over the RJ45 port. Refer to Figure 4-3 to
properly set the EPIM-T cross-over switch.

Position X
(crossed over)

1. RX+

2. RX-

3. TX+

4. NC

Page 4-4

5. NC

6. TX-

7. NC

8. NC
Position =

(not crossed over)

1. TX+

2. TX-

3. RX+

4. NC

Figure 4-3. EPIM-T Cross-over Switch

5. NC

6. RX-

7. NC

8. NC

CONNECTING TO THE NETWORK

To connect an EPIM-T to a Twisted Pair Segment:

1. Insert the RJ45 connector on the twisted pair segment into the
RJ45 port on the EPIM. See Figure 4-3.

2. Check that the EPIM’s LNK LED is on. If the LED is not on,
perform each of the following steps until it is:

a. Check that the 10BASE-T device 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 dB loss and cable

specifications outlined in Chapter 2.
e. Check that the crossover switch is in the correct position.

If a link still has not been established, contact Cabletron Systems
Technical Support.

4.1.4 Connecting a Fiber Optic Link Segment to an EPIM-F1,
EPIM-F2, or EPIM-F3

When connecting a fiber optic link segment to an EPIM-F1, F2, or F3
keep the following in mind:

• If you are connecting a fiber optic link segment with SMA 906
connectors to an EPIM-F1 with SMA ports, ensure that half
alignment sleeves are in place on each connector. A full
alignment sleeve will damage the receive port. SMA 905
connectors do not need alignment sleeves.

• If you are connecting a fiber optic link segment with ST
connectors to an EPIM-F2 /F3 with ST ports, keep in mind that
ST connectors attach to ST ports much like BNC connectors
attach to BNC ports. Insert the connector into the port with the
alignment key on the connector inserted into the alignment slot
on the port. The connector is then turned to lock it down.

Page 4-5

CONNECTING TO THE NETWORK

• The physical communication link consists of two strands of
fiber optic cabling: the Transmit (TX) and the Receive (RX). The
Transmit strand from the applicable port on the module will be
connected to the Receive port of a fiber optic Ethernet device at
the other end of the segment. F or example, TX of the applicable
port on the module will go to RX of the other fiber optic device.
The Receive strand of the applicable port on the module will be
connected to the Transmit port of the fiber optic Ethernet
device. For example, RX of the applicable port on the module
will go to TX of the other fiber optic device.

We recommend that you label the fiber optic cable to indicate
which fiber is Receive and which is Transmit. When you buy
fiber optic cable from Cabletron Systems, it is labeled so that:
at one end of the cable, one fiber is labeled 1, and the other fiber
is labeled 2. This pattern is repeated at the other end of the
cable. If you did not purchase your cable from Cabletron
Systems, be sure you label your cable as described above.

Caution: 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. Contamination of the ends can cause problems in
data transmissions. If the ends become contaminated, clean
them with alcohol using a soft, clean, lint free cloth.

To connect a fiber optic link segment to an EPIM-F1, EPIM-F2, or
EPIM-F3:

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

2. Attach the fiber labeled 1 to the applicable receive port, labeled RX,
on the module. See Figure 4-4.

Page 4-6

F1/F2

SMA 905 Connectors

CONNECTING TO THE NETWORK

ST Connectors

F1/F2

SMA 906 Connectors w/

Half Alignment Sleeves

F3

ST Connectors

Figure 4-4. The EPIM-F1, EPIM-F2 and EPIM-F3

3. Attach the fiber labeled 2 to the applicable transmit port labeled

TX, on the module.

4. At the other end of the fiber optic cable, attach the fiber labeled 1

to the transmit port of the device.

5. Attach the fiber labeled 2 to the receive port.

Page 4-7

CONNECTING TO THE NETWORK

6. Check that the EPIM’s LNK LED is on. If the LED is not on,
perform the following steps until it is:

a. Check that the power is turned on for the device at the other

end of the link.

b. Verify proper “cross-over” of fiber strands between the

applicable port on the module and the fiber optic device at the
other end of the fiber optic link segment.

c. Verify that the fiber connection meets the dB loss specifications

outlined in Chapter 2.

If a link still has not been established, contact Cabletron Systems
Technical Support.

4.1.5 Connecting a Thin-Net Segment to an EPIM-C

To connect a thin-net segment to an EPIM-C, refer to Figure 4-5 and
perform the following steps:

1. Set the Internal Termination Switch to the right of the port and
labeled TERM to:

• The on position (•) if the thin-net segment connected directly to

the port will be internally terminated at the port.

• The off position (o) if the thin-net segment will not be

terminated at the port or externally terminated.

2. If the Internal Termination switch is in the On position, connect
the thin-net segment directly to the BNC port as shown in
Figure 4-5.

3. If the Internal Termination switch is in the Off position:
a. Attach a BNC tee-connector to the BNC port on the module.
b. Attach the thin-net segment to one of the female connectors on

the tee-connector.

Page 4-8

CONNECTING TO THE NETWORK

Note: You must terminate each segment attached to the tee-connector. If
you do not attach a segment to one of the female connections on the
tee-connector, then a terminator must be placed on that connection.

c. Attach another thin-coax segment or a terminator to the other

female connector on the tee-connector.

When internal termination switch
is set to off ( ):

Connect BNC tee-connector to port.
Attach a terminator or terminated

thin-net segment to one female
connector of tee-connector.

Connect a terminated thin-net
segment to other female connector
of tee-connector.

Attach thin-net segment directly to BNC
connector when internal termination
switch is set to on ( ).

Figure 4-5. The EPIM-C

Page 4-9

CONNECTING TO THE NETWORK

PW
R

4.1.6 Connecting an AUI Cable to an EPIM-A

Caution: Ensure that the external transceiver to which the SEH will be
connected does not have the signal quality error (SQE or “heartbeat”)
test function enabled. The SEH will not operate if the transceiver has
the SQE test function enabled, and the network will be unusable. Refer
to the applicable transceiver manual.

To connect an EPIM-A to an external network segment:

1. Attach an external transceiver to the network segment that will be
connected to the AUI port. Refer to the applicable transceiver
manual.

2. Attach an AUI cable, no longer than 50 meters in length, to the
transceiver connected to the network in step 1.

3. Connect the AUI cable to the AUI port located on the EPIM-A. See
Figure 4-6.

4. Lock the AUI connector into place using the connector slide latch.

Page 4-10

13X

14X

15X

16X

17X

18X

1X

2X

3X

4X

5X

6X

Figure 4-6. The EPIM-A

EPIM-2

PWR

EPIM-A

PWR

EPIM-A

EPIM-1

CONNECTING TO THE NETWORK

5. Check that the PWR LED on the EPIM-A is on. If the LED is not

on, contact Cabletron Systems Technical Support.

6. If the PWR LED is on with the AUI cable disconnected, continue

with the following checks:
a. Check the AUI connections for proper pinouts. The pinouts for

the transceiver connection are listed in Chapter 2.
b. Check the cable for continuity.
c. Reconnect the AUI cable to the SEH and the device.

If the LED is still not on after reconnecting the segment, contact
Cabletron Systems Technical Support.

4.1.7 Connecting an AUI Cable to an EPIM-X

Caution: The signal quality error (SQE) switch remains in the OFF
position for most network connections. However, some Data Terminal
Equipment (DTE) requires SQE. Refer to your DTE manual for SQE
requirement information.

To connect an EPIM-X to a device not requiring SQE:

1. Check that the SQE LED on the EPIM-X is off. If the SQE LED is
on, check the position of the SQE switch.

Note: If the SQE light remains on, even though the SQE switch is
in the OFF position, contact Cabletron Technical Support.

2. Attach one end of an AUI cable, no longer than 50 meters in length,
to the port located on the EPIM-X (Figure 4-7) and the other end to
the intended node.

Page 4-11

CONNECTING TO THE NETWORK

ON Position
(Toward Back
of EPIM)

ON

OFF

OFF Position
(Toward Front
of EPIM)

Figure 4-7. The EPIM-X

4.2 FINISHING THE INSTALLATION

The SEH is now ready for operation. Before placing the network into
service, test the installation thoroughly, making sure that you can
address all stations 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 you encounter errors or
abnormal operation, proceed to Chapter 5, T roubleshooting.

Page 4-12

TROUBLESHOOTING

CHAPTER 5

TROUBLESHOOTING

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

5.1 INSTALLATION CHECK-OUT

After you connect 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 you encounter difficulty 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 not on:

a. Check that the 10BASE-T device 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 2 for the pin assignments for
twisted pair connectors.

For EPIM-F1/EPIM-F2/EPIM-F3 check that the TX and RX
fibers are properly connected.

c. Check the cable for continuity. A variety of tools are available

for this test, depending on the media you are using.

d. Check that the twisted pair segments meet cable specifications

for dB loss described in Chapter 2.

Page 5-1

TROUBLESHOOTING

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

• Network management has disabled the port.

• The port is segmented either because the collision detector was

on for more than 110 µsec. 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 not on, contact Cabletron Systems Technical
Support.

5.2 USING LANVIEW

The SEH incorporates the Cabletron Systems LANVIEW Status
Monitoring and Diagnostics System. LANVIEW LEDs can help
diagnose problems such as a power failure or a cable fault. The SEH
includes the following LANVIEW LEDs:

• PWR, for power status

• MGMT, for management status

• RCV (Receive), LNK (Link), and CLN (Collision) for Ethernet

status.

Figure 5-1 provides a quick reference chart of LED locations and
definitions. This chapter also includes a detailed description of each
LED.

Page 5-2

TROUBLESHOOTING

HubSTACK
SEH-24

LED NAME

PWR
(Power)

MGMT
(Management)

CLN
(Collision)

RCV
(Receive)

LNK
(Link)

10BASE-T HUB

LED COLOR

Off
Green (Solid)

Green (Flashing)
Off

Red

Yellow (Flashing)
Off

Green
Off

WITH

PWR
MGMT
CLN

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

DEFINITION

No Power
Power

SEH Managed by an Intelligent Hub
SEH Not Managed

Collision

SEH is Receiving Data
No Activity

Link Established
No Link

Figure 5-1. LANVIEW LEDs

E

24X

2

E
1

12X

PWR (Green)

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

MGMT (Green Flashing)

This LED flashes when an intelligent hub manages the SEH. If this
LED does not flash, an intelligent hub is not managing the SEH. If
you connect an intelligent hub to the SEH and the LED does not flash,
inspect the HubSTACK Interconnect cables for proper connections.

Page 5-3

TROUBLESHOOTING

CLN (Red)

This LED indicates that a collision has occurred on one of the ports.

RCV (Yellow Flashing)

When this 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 1-24

• EPIM-1: RCV LED E1

• EPIM-2: RCV LED E2

LNK (Green)

When a LNK LED is on, it indicates an established link between the
associated twisted pair segment and the 10BASE-T device at the other
end of the segment. LNK LEDs will remain on as long as a link is
maintained. Each SEH Network Port (ports 1-24) has a corresponding
LNK LED.

Page 5-4

TWISTED PAIR WIRING TABLES

APPENDIX A

TWISTED P AIR WIRING TABLES

This appendix contains twisted pair wiring tables which will assist
you if you are using a Punch Down block (see Figure A-1) to wire your
twisted pair segments. The following tables are included in this
appendix:

• Table A-1 Twisted Pair Wiring from an SEH to a Punch Down

Block

• Table A-2 Twisted Pair Wiring from a Punch Down Block to a

10BASE-T Device

• Table A-3 Twisted Pair Wiring Summary

Page A-1

TWISTED PAIR WIRING TABLES

Note: Pins 25 and 50 on Champ connector are not used.

Table A-1. Twisted Pair Wiring

from an SEH-32/34 to a Punch Down Block

From
SEH-32/34

Port 12/24

Pin Pin Pin
RX+ 48 48 Violet/Green RX+ A45 Violet/Green RX+
RX- 23 23 Green/Violet RX- A46 Green/Violet RX­TX+ 49 49 Violet/Brown TX+ A47 Violet/Brown TX+
TX- 24 24 Brown/Violet TX- A48 Brown/Violet TX-

Port 11/23

Pin Pin Pin
RX+ 46 46 Violet/Blue RX+ A41 Violet/Blue RX+
RX- 21 21 Blue/Violet RX- A42 Blue/Violet RX­TX+ 47 47 Violet/OrangeTX+ A43 Violet/Orange TX+
TX- 22 22 Orange/Violet TX- A44 Orange/Violet TX-

Port 10/22

Pin Pin Pin
RX+ 44 44 Yellow/Brown RX+ A37 Yellow/BrownRX+
RX- 19 19 Brown/Yellow RX- A38 Brown/YellowRX­TX+ 45 45 Yellow/Gray TX+ A39 Yellow/Gray TX+
TX- 20 20 Gray/Yellow TX- A40 Gray/Yellow TX-

Into and Out of
50-Pin Feeder Cable

Into Punch Down
Block

Port 9/21

Pin Pin Pin
RX+ 42 42 Yellow/OrangeRX+ A33 Yellow/OrangeRX+
RX- 17 17 Orange/YellowRX- A34 Orange/YellowRX­TX+ 43 43 Yellow/Green TX+ A35 Yellow/Green TX+
TX- 18 18 Green/Yellow TX- A36 Green/Yellow TX-

Page A-2

TWISTED PAIR WIRING TABLES

Table A-1. Twisted Pair Wiring

from an SEH-32/34 to a Punch Down Block (Continued)

From
SEH-32/34

Port 8/20

Pin Pin Pin
RX+ 40 40 Black/Gray RX+ A29 Black/Gray RX+
RX- 15 15 Gray/Black RX- A30 Gray/Black RX­TX+ 41 41 Yellow/Blue TX+ A31 Yellow/Blue TX+
TX- 16 16 Blue/Yellow TX- A32 Blue/Yellow TX-

Port 7/19

Pin Pin Pin
RX+ 38 38 Black/Green RX+ A25 Black/Green RX+
RX- 13 13 Green/Black RX- A26 Green/Black RX­TX+ 39 39 Black/Brown TX+ A27 Black/Brown TX+
TX- 14 14 Brown/Black TX- A28 Brown/Black TX-

Port 6/18

Pin Pin Pin
RX+ 36 36 Black/Blue RX+ A21 Black/Blue RX+
RX- 11 11 Blue/Black RX- A22 Blue/Black RX­TX+ 37 37 Black/Orange TX+ A23 Black/OrangeTX+
TX- 12 12 Orange/Black TX- A24 Orange/BlackTX-

Into and Out of
50-Pin Feeder Cable

Into Punch Down
Block

Port 5/17

Pin Pin Pin
RX+ 34 34 Red/Brown RX+ A17 Red/Brown RX+
RX- 9 9 Brown/Red RX- A18 Brown/Red RX­TX+ 35 35 Red/Gray TX+ A19 Red/Gray TX+
TX- 10 10 Gray/Red TX- A20 Gray/Red TX-

Page A-3

TWISTED PAIR WIRING TABLES

Table A-1. Twisted Pair Wiring

from an SEH-32/34 to a Punch Down Block (Continued)

From
SEH-32/34

Port 4/16

Pin Pin Pin
RX+ 32 32 Red/Orange RX+ A13 Red/Orange RX+
RX- 7 7 Orange/Red RX- A14 Orange/Red RX­TX+ 33 33 Red/Green TX+ A15 Red/Green TX+
TX- 8 8 Green/Red TX- A16 Green/Red TX

Port 3/15

Pin Pin Pin
RX+ 30 30 White/Gray RX+ A9 White/Gray RX+
RX- 5 5 Gray/White RX- A10 Gray/White RX­TX+ 31 31 Red/Blue TX+ A11 Red/Blue TX+
TX- 6 6 Blue/Red TX- A12 Blue/Red TX-

Port 2/14

Pin Pin Pin
RX+ 28 28 White/Green RX+ A5 White/Green RX+
RX- 3 3 Green/White RX- A6 Green/White RX­TX+ 29 29 White/Brown TX+ A7 White/Brown TX+
TX- 4 4 Brown/White TX- A8 Brown/White TX-

Into and Out of
50-Pin Feeder Cable

Into Punch Down
Block

Port 1/13

Pin Pin Pin
RX+ 26 26 White/Blue RX+ A1 White/Blue RX+
RX- 1 1 Blue/White RX- A2 Blue/White RX­TX+ 27 27 White/Orange TX+ A3 White/OrangeTX+
TX- 2 2 Orange/WhiteTX- A4 Orange/WhiteTX-

Page A-4

TWISTED PAIR WIRING TABLES

Table A-2. Twisted Pair Wiring

from a Punch Down Block to a 10Base-T Device

From Punch Down
Block

Port 12/24 Pin Pin Pin
B45 Violet/Green RX+ 1 TX+ 1 TX+ 1 TX+
B46 Green/Violet RX- 2 TX- 2 TX- 2 TX­B47 Violet/Brown TX+ 3 RX+ 3 RX+ 3 RX+
B48 Brown/Violet TX- 6 RX- 6 RX- 6 RX-

Port 11/23 Pin Pin Pin
B41 Violet/Blue RX+ 1 TX+ 1 TX+ 1 TX+
B42 Blue/Violet RX- 2 TX- 2 TX- 2 TX­B43 Violet/Orange TX+ 3 RX+ 3 RX+ 3 RX+
B44 Orange/Violet TX- 6 RX- 6 RX- 6 RX-

Port 10/22 Pin Pin Pin
B37 Yellow/Brown RX+ 1 TX+ 1 TX+ 1 TX+

To RJ-45
Wallplate

Into
Office
Drop

Into
10BASE-T
Device

B38 Brown/Yellow RX- 2 TX- 2 TX- 2 TX­B39 Yellow/Gray TX+ 3 RX+ 3 RX+ 3 RX+
B40 Gray/Yellow TX- 6 RX- 6 RX- 6 RX-

Port 9/21 Pin Pin Pin
B33 Yellow/Orange RX+ 1 TX+ 1 TX+ 1 TX+
B34 Orange/Yellow RX- 2 TX- 2 TX- 2 TX­B35 Yellow/Green TX+ 3 RX+ 3 RX+ 3 RX+
B36 Green/Yellow TX- 6 RX- 6 RX- 6 RX-

Page A-5

TWISTED PAIR WIRING TABLES

Table A-2. Twisted Pair Wiring

from a Punch Down Block to a 10Base-T Device (Continued)

From Punch Down
Block

Port 8/20 Pin Pin Pin
B29 Black/Gray RX+ 1 TX+ 1 TX+ 1 TX+
B30 Gray/Black RX- 2 TX- 2 TX- 2 TX­B31 Yellow/Blue TX+ 3 RX+ 3 RX+ 3 RX+
B32 Blue/Yellow TX- 6RX- 6 RX- 6 RX-

Port 7/19 Pin Pin Pin
B25 Black/Green RX+ 1 TX+ 1 TX+ 1 TX+
B26 Green/Black RX- 2 TX- 2 TX- 2 TX­B27 Black/Brown TX+ 3 RX+ 3 RX+ 3 RX+
B28 Brown/Black TX- 6 RX- 6 RX- 6 RX-

Port 6/18 Pin Pin Pin
B21 Black/Blue RX+ 1 TX+ 1 TX+ 1 TX+

To RJ-45
Wallplate

Into
Office
Drop

Into
10BASE-T
Device

B22 Blue/Black RX- 2 TX- 2 TX- 2 TX­B23 Black/Orange TX+ 3 RX+ 3 RX+ 3 RX+
B24 Orange/Black TX- 6 RX- 6 RX- 6 RX-

Port 5/17 Pin Pin Pin
B17 Red/Brown RX+ 1 TX+ 1 TX+ 1 TX+
B18 Brown/Red RX- 2 TX- 2 TX- 2 TX­B19 Red/Gray TX+ 3 RX+ 3 RX+ 3 RX+
B20 Gray/Red TX- 6 RX- 6 RX- 6 RX-

Page A-6

TWISTED PAIR WIRING TABLES

Table A-2. Twisted Pair Wiring

from a Punch Down Block to a 10Base-T Device (Continued)

From Punch Down
Block

Port 4/16 Pin Pin Pin
B13 Red/Orange RX+ 1 TX+ 1 TX+ 1 TX+
B14 Orange/Red RX- 2 TX- 2 TX- 2 TX­B15 Red/Green TX+ 3 RX+ 3 RX+ 2 TX­B16 Green/Red TX- 6 RX- 6 RX- 6 RX-

Port 3/15 Pin Pin Pin
B9 White/Gray RX+ 1 TX+ 1 TX+ 1 TX+
B10 Gray/White RX- 2 TX- 2 TX- 2 TX­B11 Red/Blue TX+ 3 RX+ 3 RX+ 3 RX+
B12 Blue/Red TX- 6 RX- 6 RX- 6 RX-

Port 2/14 Pin Pin Pin
B5 White/Green RX+ 1 TX+ 1 TX+ 1 TX+

To RJ-45
Wallplate

Into
Office
Drop

Into
10BASE-T
Device

B6 Green/White RX- 2 TX- 2 TX- 2 TX­B7 White/Brown TX+ 3 RX+ 3 RX+ 3 RX+
B8 Brown/White TX- 6 RX- 6 RX- 6 RX-

Port 1/13 Pin Pin Pin
B1 White/Blue RX+ 1 TX+ 1 TX+ 1 TX+
B2 Blue/White RX- 2 TX- 2 TX- 2 TX­B3 White/Orange TX+ 3 RX+ 3 RX+ 3 RX+
B4 Orange/White TX- 6 RX- 6 RX- 6 RX-

Page A-7

TWISTED PAIR WIRING TABLES

Port 12
4

2
4

2

P
4

2
4

2
:

:
:

:
:
:

:
:
:
:
:

P
2

1
2

2

A45 RX+
A

-

A

+

A

-

A

+

A

-

A

+

A

-

:
:

:
:
:
:

:
:
:
:
:

A
A

A
A

PIN 1 TX+
P

X-

P

X+

P

X+

P

X+

P

X-

P

X+

P

X-

:
:

:
:
:
:

:
:
:
:
:

P

X+

P

X-

P

X+

P

X-

PIN 1 TX+
P

X-

P

X+

P

X+

P

X+

P

X-

P

X+

P

X-

:
:

:
:
:
:

:
:
:
:
:

P

X+

P

X-

P

X+

P

X-

{

25 Pin

der

ble

{

25 Pin

der

ble

{

25 Pin

der

ble

{

4 Pair

d
ion

{

4 Pair

d
ion

{

4 Pair

d
ion

{

Office

op

{

Office

op

{

Office

op

Table A-3. Twisted Pair Wiring Summary

SEH-32/34
Champ

8 RX+
3 RX-

9 TX+
4 TX-

ort 11

6 RX+
1 RX-

7 TX+
2 TX-

Fee

Ca

Fee

Ca

Punch
Down Block

{

46 RX
47 TX

48 TX

41 RX

{

42 RX
43 TX

44 TX

Twiste

Distribut

Cable

Twiste

Distribut

Cable

Wall Plate
(If Required)

{

IN 2 T
IN 3 R

IN 6 R

IN 1 T

{

IN 2 T
IN 3 R

IN 6 R

10BASE-T
Ethernet
Device

{

IN 2 T

Dr

Dr

IN 3 R
IN 6 R

IN 1 T

{

IN 2 T
IN 3 R

IN 6 R

Page A-8

ort 1

6 RX+
RX-

7 TX+
TX-

Fee

Ca

{

1 RX+
2 RX-

3 TX+
4 TX-

Twiste

Distribut

Cable

{

IN 1 T
IN 2 T

IN 3 R
IN 6 R

Dr

{

IN 1 T
IN 2 T

IN 3 R
IN 6 R

1
2
3

4
5

6
7
8

9
10

11
12
13

14
15

16
17
18

19
20

21
22
23

24
25
26

27
28

29
30
31

32
33

34
35
36

37
38

39
40
41

42
43

44
45
46

47
48

49
50

TWISTED PAIR WIRING TABLES

A B C D

Figure A-1. Punch Down Block

Page A-9

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.