Cabletron Systems CXRMIM, FORMIM-22, TPRMIM-20, TPRMIM-22, TPRMIM-33 Installation Manual

REPEATER MEDIA INTERFACE MODULES

(TPRMIM/FORMIM/CXRMIM)

INSTALLATION GUIDE

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

Notice

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 1994 by:
Cabletron Systems, Inc.
P.O. Box 5005, Rochester, NH 03866-5005

All Rights Reserved
Printed in the United States of America

Order number: 9030679-02 October 94

Remote LANVIEW, LANVIEW, Multi Media Access Center

trademarks of Cabletron Systems, Inc.

EMME, EMM-E6, RMIM, CXRMIM, TPRMIM, FORMIM, EPIM-A, EPIM-X, EPIM-F,
EPIM-T, MMAC-3FNB, MMAC-5FNB, MMAC-8FNB, MMAC-M8FNB, IRM, IRM2, IRM3,
and IRBM

Windows
CompuServe
UNIX

are trademarks of Cabletron Systems, Inc.

is a registered trademark of Microsoft Corporation.

is a registered trademark of CompuServe, Inc.

is a registered trademark of UNIX System Laboratories, Inc.

Printed On

Recycled Paper

and

SPECTRUM

are registered

Installation Guide

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.

CABLETRON SYSTEMS, INC.

PROGRAM LICENSE AGREEMENT

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

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

ii

Repeater MIM

CABLETRON SOFTWARE PROGRAM LICENSE

Notice

1. LICENSE.
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.

You have the right to use only the one (1) copy of the Program provided in this

EXCLUSION OF WARRANTY

AND DISCLAIMER OF LIABILITY

1. EXCLUSION OF WARRANTY.
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.

Except as may be specifically provided by Cabletron in

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.

Installation Guide

iii

Notice

UNITED STATES GOVERNMENT

RESTRICTED RIGHTS

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

For Department of Defense units, the product is licensed with “Restricted Rights” as defined in the
DoD Supplement to the Federal Acquisition Regulations, Section 52.227-7013 (c) (1) (ii) and its
successors, and use, duplication, disclosure by the Government is subject to restrictions as set forth in
subparagraph (c) (1) (ii) of the Rights in Technical Data and Computer Software clause at 252.227-

7013. Cabletron Systems, Inc., 35 Industrial Way, Rochester, New Hampshire 03867.

SAFETY

It is the responsibility of the person who sells the system to which

WARNING

the TPRMIM, FORMIM, CXRMIM or EPIMs will be a part to
ensure that the total system meets allowed limits of conducted and
radiated emissions.

Designed in accordance with UL478, UL910, NEC 725-2(b), CSA, IEC, TUV,
VDE Class A. Meets FCC Part 15, Class A limits.

iv

Repeater MIM

CONTENTS

CHAPTER 1 Introduction

1.1 Using this Manual........................................................................1-2

1.2 Getting Help.................................................................................1-2

1.3 RMIM Overview...........................................................................1-3

1.4 RMIM Features............................................................................1-4

1.5 The Multimedia Access Centers with FNB..................................1-6

1.6 The EMME...................................................................................1-6

1.7 The EMM-E6 ...............................................................................1-8

1.8 Related Manuals..........................................................................1-9

CHAPTER 2 Installation Requirements and Specifications

2.1 Network Cable Requirements......................................................2-1

2.1.1 10BASE-2 Thin-Net Network Requirements .................2-1

2.1.2 10BASE-T Twisted Pair Network Requirements ...........2-2

2.1.3 FOIRL/10BASE-FL Multimode Fiber Optic

Network Requirements for the FORMIM .......................2-4

2.1.4 FOIRL/10BASE-FL Single Mode Fiber Optic

Network Requirements for the FORMIM .......................2-5

2.1.5 Transceiver/AUI Requirements for the

TPRMIM-36 ...................................................................2-6

2.2 RMIM Network Port Specifications..............................................2-7

2.2.1 TPRMIM-20/22 RJ45 Connector Specifications ............2-7

2.2.2 TPRMIM-33/36 Champ Connector Specifications .........2-7

2.2.3 CXRMIM Coaxial Connector Specifications ..................2-9

2.2.4 FORMIM-22, ST Connector Specifications ...................2-9

2.3 Operating Specifications............................................................2-11

CHAPTER 3 Installing the RMIM

3.1 Unpacking the RMIM...................................................................3-1

3.2 Setting the RMIM Jumpers for the CXRMIM,

FORMIM and TPRMIM................................................................3-2

3.2.1 Setting the Ethernet Jumpers ........................................3-3

3.2.2 Setting the Unmanaged Module Group Jumper ............3-3

3.3 Installing the RMIM into the MMAC.............................................3-5

3.3.1 Installing an EPIM ..........................................................3-7

3.4 Connecting the RMIM/EPIM to the Network................................3-9

3.4.1 Attaching Thin-Net Segments to the CXRMIM ..............3-9

3.4.2 Connecting a Thin-Net Segment to an EPIM-C ...........3-10

Installation Guide

v

Contents

3.4.3 Attaching a Twisted Pair Segment to the

TPRMIM-20/22 .............................................................3-12

3.4.4 Attaching a Twisted Pair Segment to the

TPRMIM-33/36 .............................................................3-13

3.4.5 Connecting a Twisted Pair Segment to an

EPIM-T .........................................................................3-14

3.4.6 Connecting a Fiber Optic Link Segment to a

FORMIM, EPIM-F1, EPIM-F2, or EPIM-F3 ..................3-16

3.4.7 Connecting an AUI Cable to an EPIM-A

or EPIM-X .....................................................................3-19

CHAPTER 4 Testing the RMIMs

4.1 Pre-Installation Test.....................................................................4-1

4.2 Installation Check-Out..................................................................4-2

APPENDIX A Twisted Pair Wiring Tables

APPENDIX B EPIM Specifications

INDEX

vi

Repeater MIM

CHAPTER 1

INTRODUCTION

Welcome to the Cabletron Systems’

(RMIM™) Installation Guide

Repeater Media Interface Module

. This manual is a reference guide for Cabletron’ s
family of RMIMs. These modules incorporate the Repeater Interface Controller
(RIC). The RIC is a multi-port repeater that enables the RMIMs to autonomously
repeat packets without channeling them to a repeater module. The following
RMIMs incorporate RIC technology:

•

TPRMIM-20™ & TPRMIM-22™ –

The TPRMIM-20 provides nine
10BASE-T RJ45 Unshielded Twisted Pair (UTP) ports and one slot for a
Cabletron Systems Ethernet Port Interface Module (EPIM). The TPRMIM­22 provides twenty-one 10BASE-T RJ45 UTP ports and one EPIM slot.

•

TPRMIM-33™ & TPRMIM-36™

– The TPRMIM-33 has one
50-pin champ connector providing twelve 10BASE-T twisted pair ports and
one EPIM slot. The TPRMIM-36 has two 50-pin champ connectors
providing twenty-four 10BASE-T twisted pair ports, one AUI connector , and
one EPIM slot.

•

CXRMIM™

– The CXRMIM is equipped with twelve 10BASE-2 coaxial

connectors and one EPIM slot.

•

FORMIM-22™ –

The FORMIM-22 is equipped with twelve

FOIRL/10BASE-FL ports with ST type connectors.

This manual uses the term RMIM when describing features and

NOTE

functions that are common to the TPRMIM-20, TPRMIM-22,
TPRMIM-33, TPRMIM-36, CXRMIM, and FORMIM-22.

Installation Guide

1-1

Chapter 1:

INTRODUCTION

1.1 USING THIS MANUAL

Read this manual to gain a full understanding of the features and capabilities of
the Cabletron Systems RMIMs. You should have a general w orking knowledge of
Ethernet or IEEE 802.3 type data communications networks and their physical
layer components before installing the RMIMs.

Chapter 1,

Introduction

, discusses the contents of this manual, briefly describes
capabilities and special features of the RMIMs, and concludes with a list of
related manuals.

Chapter 2,

Installation Requirements/Specifications

, describes installation
requirements, network guidelines, and operating specifications for the RMIMs
and EPIMs.

Chapter 3,

Installing the RMIM

, contains instructions for setting the RMIM
jumpers and installing the RMIMs into the MMAC/FNB. This chapter also
explains how to connect network segments to the RMIMs and EPIMs.

Chapter 4,

Testing the RMIMs,

provides procedures for testing and
troubleshooting the installation of the RMIMs. It also explains how to use
Cabletron Systems’ LANVIEW diagnostic and monitoring system.

Appendix A,

T wisted Pair Wiring Tables

, contains wiring pinouts for

Punchdown Block applications.

Appendix B,

EPIM Specifications

, provides specifications and switch settings

for the Ethernet Port Interface Modules (EPIMs).

1.2 GETTING HELP

If you need additional support related to the Cabletron Systems RMIMs, 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]

1-2

Repeater MIM

RMIM OVERVIEW

1.3 RMIM OVERVIEW

Cabletron Systems Repeater Media Interface Modules provide connections to
10BASE-T, 10BASE-2, and FOIRL/10BASE-FL based Ethernet networks.
Figure 1-1 shows each module.

RMIMs repeat, retime, and regenerate each packet ensuring data integrity and
maximum data path distance. RMIMs also have a Fault Isolation feature that
automatically segments problem ports from the network. When the problem port
receives a good packet, the RMIM automatically reconnects the port to the
network.

FORMIM-22

SN

ETHERNET

RCV LNK

TX

7

RX

RCV LNK

TX

8

RX

RCV LNK

TX

9

RX

RCV LNK

TX

10

RX

RCV LNK

TX

11

RX

RCV LNK

TX

12

RX

FOIRL/10BASE-FL

ETHERNET

B C

RCV LNK

RCV LNK

RCV LNK

RCV LNK

RCV LNK

RCV LNK

CLN
POK

1

2

3

4

5

6

7

TPRMIM-33

SN

ETHERNET

1

2
3
4
5
6
7
8

9
10
11
12
13

10BASE-T
ETHERNET

RCV POK

CXRMIM

SN

ETHERNET

8

9

10

11

12

13

RCV

POKRCV POKRCV

10BASE-2
ETHERNET

B C

CLN

1

2

3

4

5

6

B C

CLN

L

R

N

C

K

V

SN

14

15
16
17
18
19
20
21
22
23
24
25
26

14

1

13

26

15

2

TPRMIM-36

ETHERNET

CLN

1

RCV POK

2
3
4
5
6
7
8
9
10
11
12
13

L

R

N

C

K

V

10BASE-T
ETHERNET

B C

RCV POK

R
C
V

CLN

L
N
K

TPRMIM-20

1

SN

13

2

ETHERNET

6
7
8
9

10

10BASE-T
ETHERNET

TPRMIM-22

B C

LNK

CLN

RCV

POK

LNK

LNK
RCV

11

RCV

12

1

13

2

14

3

15

4

16

5

17
18
19
20
21
22

E
P

I

M

2
X

3
X

4
X

SN

5
X

6
X

7
X

8
X

9
X

1
0
X

ETHERNET

CLN

6
7
8
9

10

11
X

12

X

13

X

14

X

15

X

16

X

17

X

18

X

19

X

20

X

21

X

22

X

10BASE-T
ETHERNET

B C

CLN

LNK

LNK

POK

RCV

RCV

1
2
3
4
5

E
P

I

M

2
X

3
X

4
X

5
X

6
X

7
X

8
X

9
X

10

X

Figure 1-1. Repeater Media Interface Modules

The RMIMs are designed, when managed by Cabletron’s Ethernet Management
Module for Ethernet (EMME or EMM-E6), to provide you with the capability to
add two additional Ethernet networks (B or C) to your existing Multi Media
Access Center® (MMAC) over the Flexible Network Bus (FNB). Sections 1.5,

1.6 and 1.7 of this chapter describe features of the MMAC, the EMME and the
EMM-E6.

Installation Guide

1-3

Chapter 1:

INTRODUCTION

1.4 RMIM FEATURES

Repeater Functionality

The RMIM IEEE 802.3 compliant repeater provides the MMAC with the ability
to achieve maximum length data paths on each Ethernet network. To attain these
maximum length data paths, the RMIM retimes data packets and regenerates the
preamble of each data packet that enters the MMAC.

Additionally, the RMIM repeater functionality ensures that problem segments
connected to any port on the MMAC/FNB will not affect any other segments
connected to the MMAC/FNB. If 32 consecutive collisions are detected on any
segment, or if a collision detector is on for more than 110 µs, the RMIM will
automatically partition that segment from the MMAC/FNB. The segment will
automatically be reconnected to the MMAC/FNB when a packet is recei v ed from
the segment (or transmitted onto the segment, if using coaxial cable) without
causing a collision.

RIC technology provides an inter-RIC bus that allows for communication
between the RMIMs, allowing multiple RICs to be cascaded. The multiple RICs
communicating over the RIC bus act as a single logical repeater. This is a
significant advantage, since in the past, Ethernet networks were limited to four
serially linked repeaters. W ith cascading RIC repeaters, each of which support 13
cable segments, you can build a much larger network than you could with stand­alone repeaters.

Unmanaged Grouped Module (Subnet) Capability

You can set Jumpers on the MMAC-installed RMIM to create an “unmanaged
module group” of boards using the B or C channel. The RMIM and all boards to
its left in the MMAC chassis no longer communicate across the FNB backplane
to the EMME, EMM-E6 or any modules to the right of the unmanaged module
group. This provides two additional “unmanaged” Ethernet networks. The
networks cannot be seen or managed from the EMME or EMM-E6 installed in
the MMAC. Section 3.2 describes how to set the RMIM jumpers.

Stand-alone Capability

You can also use the MMAC-installed RMIM as an “unmanaged” stand-alone
repeater.

1-4

Repeater MIM

RMIM FEATURES

Remote Network Management Capabilities

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

• Cabletron Systems SPECTRUM

®

• Cabletron Systems Remote LANVIEW®/Windows™

• SPECTRUM Portable Management Applications

Ethernet Port Interface Modules

Cabletron Systems’ Ethernet Port Interface Modules (EPIMs) provide additional
connection to the Ethernet network. Table 1-1 describes each EPIM.

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 RJ45
EPIM-X Standard Transcei v er DB15 (Male)
EPIM-F1 Multimode Fiber SMA
EPIM-F2 Multimode Fiber ST
EPIM-F3 Single Mode Fiber ST

LANVIEW LEDs

The RMIMs incorporate LANVIEW, Cabletron Systems’ built-in diagnostic and
status monitoring LED system. LANVIEW LEDs help you rapidly diagnose
device, port, and link problems. You can also view Ethernet status LEDs to
determine if the RMIM is running on Ethernet B, Ethernet C, or stand-alone
mode. Chapter 4 describes each LED.

Installation Guide

1-5

Chapter 1:

INTRODUCTION

1.5 THE MULTI MEDIA ACCESS CENTERS WITH FNB

Cabletron Systems Multi Media Access Center with Flexible Network Bus
(MMAC/FNB) provides three separately repeated Ethernet segments: Ethernets
A, B, and C. The Cabletron Systems non-repeating Media Interface Modules
(MIMs) operate on Ethernet A, while the RMIMs are designed to operate on
Ethernet segments B and C. See Figure 1-2.

Power & Management Bus

Ethernet A Bus

Flexible Network Bus

Ethernet B Bus

Ethernet C Bus

Figure 1-2. MMAC with FNB

The modular design of the MMAC allows the RMIMs to co-exist with other
MIMs to provide a variety of different media connections at one point. This
means that the RMIM can be used by itself or in conjunction with any
combination of other MIMs accommodating Twisted Pair, Fiber Optic Cable,
Thick or Thin Ethernet Coaxial Cabling, or AUI Cabling. Figure 1-3 shows a
sample configuration.

1.6 THE EMME

The Ethernet Management Module for Ethernet (EMME) provides management,
bridging, and routing (optional feature) for four Ethernet channels; channels A,
B, and C on the MMAC backplane and channel D from the EMME AUI port. The
four EMME channels access the same shared memory so that packets received on
one channel can be forwarded to any or all of the other channels.

1-6

Repeater MIM

THE EMME

The EMME uses Ethernet Channel A on the MMAC backplane to transmit and
receive data from Cabletron Systems non-repeater MIMs (i.e., TPMIMs,
FOMIMs, THN-MIMs). The EMME provides repeater functionality for these
MIMs.

TPMIM-24

Channel A

CXRMIMFORMIM-22FORMIM-22TPMIM-24

Channel B Channel C

TPRMIM-33

TPRMIM-36

EMME

Channel D

Ethernet channels B and C transmit and receive packets over the Repeater
Interface Controller (RIC) management bus on the FNB to Cabletron Systems
RMIMs (TPRMIM, FORMIM, and CXRMIM). RMIMs can repeat packets
autonomously without channeling them through the EMME.

Two redundant AUI ports on the EMME’s front panel let you access Ethernet
channel D. The AUI ports allow you to connect the module to a variety of
Ethernet transmission media including twisted pair, fiber optic, or thick or thin
Ethernet coaxial cable.

Installation Guide

Figure 1-3. Ethernets A, B, and C

1-7

Chapter 1:

INTRODUCTION

When using the Cabletron Systems EMME along with the RMIMs, you have the
network management capabilities that enable you to control the RMIM and its
attached segments. For example, you can gather information on the number of
good packets and collisions that pass through each port on the RMIM.

1.7 THE EMM-E6

The EMM-E6 (Ethernet Management Module) is a six port bridge/router module
with four Ethernet bridge/router ports and two user selectable bridge/router ports.
The EMM-E6 provides management, bridging, and routing for three Ethernet
channels; channels A, B, and C on the MMAC backplane and a fourth external
Ethernet segment (channel D) via an Ethernet Port Interface module (EPIM).
Two Bridge/Router Interface Module (BRIM) ports can be configured to pro vide
additional bridging or feeder node routing on Ethernet, Token Ring, FDDI, ATM
or Wide Area Networks (WAN).

The EMM-E6 uses Ethernet Channel A on the MMAC backplane to transmit and
receive data from Cabletron Systems non-repeater MIMs (i.e., TPMIMs,
FOMIMs, THN-MIMs). The EMM-E6 provides repeater functionality for these
MIMs.

Ethernet channels B and C transmit and receive packets over the Repeater
Interface Controller (RIC) management bus on the FNB to Cabletron Systems
RMIMs (TPRMIM, FORMIM, and CXRMIM). RMIMs can repeat packets
autonomously without channeling them through the EMM-E6.

The EMM-E6 provides two slots for optional EPIMs on the front panel. The
EPIMs provide an Ethernet D channel for various transmission media
connections (twisted pair, fiber optic, and thick or thin Ethernet coaxial cable).
Using two EPIMs provides redundancy for the external network connection but
note that only one EPIM operates at any given time.

The two Bridge Router Interface Modules (BRIMs) perform the same bridging
functions as EPIMs, however, unlike EPIMs, BRIMs bridge packets from one
transmission type to another (e.g., Ethernet to FDDI, ATM to Wide Area, etc.).

1-8

Repeater MIM

RELATED MANUALS

1.8 RELATED MANUALS

The manuals listed below should be used to supplement the procedures and other
technical data provided in this manual. The procedures in them will be
referenced, where appropriate, but will not be repeated.

Cabletron Systems’

Multi Media Access Center (MMAC-M8FNB, MMAC-

5FNB, MMAC-M3FNB) Overview and Set Up Guide

Cabletron Systems’

Cabletron Systems’

Ethernet Management Module (EMME) User’s Guide

EMM-E6 Installation Guide

Installation Guide

1-9

Chapter 1:

INTRODUCTION

1-10

Repeater MIM

CHAPTER 2

INSTALLATION

REQUIREMENTS/SPECIFICATIONS

This Chapter describes cable requirements, network guidelines, and operating
specifications for the RMIMs. Be sure that you read this chapter before you
install the RMIMs. 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 NETWORK CABLE REQUIREMENTS

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 cable requirements for each media type.

2.1.1 10BASE-2 Thin-Net Network Requirements

When connecting a 10BASE-2 thin-net coaxial segment to the CXRMIM or
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.

Installation Guide

2-1

Chapter 2: INSTALLATION REQUIREMENTS/SPECIFICATIONS

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 or
CXRMIM BNC ports to earth ground.

Connecting a thin-net segment to earth ground at more than one

WARNING

point could produce dangerous ground currents. The BNC ports of
the CXRMIM are connected to earth ground, eliminating the need
of grounding the segments connected to the BNC ports. The EPIM­C provides a switch to select either internal or external termination.

2.1.2 10BASE-T Twisted Pair Network Requirements

When connecting a 10BASE-T Twisted Pair Segment to a TPRMIM-20/22/33/36
or EPIM-T, your network must meet the following requirements:

Length

The IEEE 802.3 10BASE-T standard requires that 10BASE-T devices transmit
over a 100 meter (328 foot) link using 22-24 AWG unshielded 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.

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.

2-2 Repeater MIM

NETWORK CABLE REQUIREMENTS

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 receiv ed 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.

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. 10B ASE-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 may cause data errors if the impulses occur at very specific times during
data transmission. Generally, the user need not be concerned about noise. If
noise-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 (68°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.

Installation Guide 2-3

Chapter 2: INSTALLATION REQUIREMENTS/SPECIFICATIONS

2.1.3 FOIRL/10BASE-FL Multimode Fiber Optic Network
Requirements for the FORMIM

When connecting a multimode fiber optic segment to a FORMIM-22, EPIM-F1,
or EPIM-F2, your network must meet the following requirements:

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

optic cable length is
2 km (2187.2 yards).

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.

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.

2-4 Repeater MIM

NETWORK CABLE REQUIREMENTS

2.1.4 FOIRL/10BASE-FL Single Mode Fiber Optic Network
Requirements for the FORMIM

When connecting a single mode fiber optic segment to an EPIM-F3, your
network must meet the following requirements:

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 a 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.

Installation Guide 2-5

Chapter 2: INSTALLATION REQUIREMENTS/SPECIFICATIONS

2.1.5 Transceiver/AUI Requirements for the TPRMIM-36

To connect external network segments to the EPIM-A, EPIM-X, or the AUI port
on the TPRMIM-36, you need an AUI cable. The TPRMIM-36 and EPIM-A
require a transceiver to connect to the segment. The EPIM-X has built-in dual
transceivers and can be connected directly to the segment. The EPIM-X is used
primarily for connecting cascading devices.

When connecting an external network segment to a TPRMIM-36, EPIM-A, or
EPIM-X, your network must meet the following requirements:

Transceiver/Ethernet Device (EPIM-A/TPRMIM-36)

The transceiver or Ethernet De vice to which the EPIM-A or TPRMIM-36 will be
connected must meet IEEE 802.3 standards, and/or Ethernet Version 1.0 or
Version 2.0 requirements.

AUI Cable

The A UI 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 earth
ground.

2-6 Repeater MIM

RMIM NETWORK PORT SPECIFICATIONS

2.2 RMIM NETWORK PORT SPECIFICATIONS

The following sections provide port specifications for each RMIM.

2.2.1 TPRMIM-20/22 RJ45 Connector Specifications

The TPRMIM-20 and the TPRMIM-22 provide RJ45 connectors to attach
twisted pair segments to the network. Figure 2-1 shows the pinouts for the RJ45
connectors.

8. Not Used

7. Not Used

6. Transmit -

5. Not Used

4. Not Used

3. Transmit +

2. Receive -

1. Receive +

Figure 2-1. RJ45 Network Ports

2.2.2 TPRMIM-33/36 Champ Connector Specifications

The TPRMIM-33 and TPRMIM-36 provide 50-pin Champ connectors to attach
twisted pair segments to the network as shown in Figure 2-2. Table 2-3 shows the
pinouts for the Champ connector.

8
7

6
5

4

3
2
1

Installation Guide 2-7

26

15

13

2

Figure 2-2. 50-Pin Champ Connector

Chapter 2: INSTALLATION REQUIREMENTS/SPECIFICATIONS

Table 2-3. 50-Pin Champ Connector Pinouts

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

2-8 Repeater MIM

RMIM NETWORK PORT SPECIFICATIONS

2.2.3 CXRMIM Coaxial Connector Specifications

Connector Type

The CXRMIM is equipped with BNC receptacles, with a gold center contact, for
use with BNC type tee-connectors and RG-58 thin-net cable. Thick coaxial cable
may be used with a thick to thin barrel connector.

Termination

The BNC ports on the CXRMIM are internally terminated.

2.2.4 FORMIM-22 ST Connector Specifications

Connector Type

The FORMIM-22 is equipped with ST fiber optic ports. Specifications for the ST
ports are listed below.

0 dBm

-5 dBm

-10 dBm

-15 dBm

-20 dBm

-25 dBm

-30 dBm

-35 dBm

-40 dBm

Receive

Sensitivity

Transmitter
Power (into

62.5/125 µm
fiber)

Error Rate: Better than 10

Maximum

Receive

Input Power

Typical Receive Input (-7.6)
Mimimum Receive Input (-8.2)

Typical Transmit Power (-10.0)
Minimum Transmit Power (-12.0)

Minimum Sensitivity (-29.5)

Typical Sensitivity (-30.5)

Maximum Sensitivity (-36.0)

-10

Figure 2-3. FORMIM-22 Transceiver Sensitivity

Installation Guide 2-9

Chapter 2: INSTALLATION REQUIREMENTS/SPECIFICATIONS

The transmitter power levels and receive sensitivity levels given in

NOTE

Figure 2-3 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 measure
power levels 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).

Table 2-4. FORMIM-22 Specifications

Parameter Typical Minimum Maximum

Transmitter
Peak Wavelength 820 nm 790 nm 860 nm

Rise Time/
Fall Time

4 nsec
4 nsec

-

-

10 nsec

10 nsec
Spectral Width - - 75 nm
Duty Cycle 50% 48% 52%

2-10 Repeater MIM

OPERATING SPECIFICATIONS

2.3 OPERATING SPECIFICATIONS

The section provides operating specifications for the RMIMs. Cabletron Systems
reserves the right to change these specifications at any time without notice.

REPEATER FUNCTIONALITY

Preamble

Input: Minimum of 40 bits. Maximum is the

number of bits received.

Output: Minimum of 64 bits, last 2 bits are 1, 1.

Maximum is the number of bits received
plus 6.

JAM Output: If a collision occurs on one of the segments,

a pattern of 1, 0 is sent to the other segments.

Minimum Packet: 96 bits including preamble (Packet Repeated

fragments are extended using the JAM [1, 0]
data pattern).

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
onto or received from the FAULT protected
segment without causing a collision.

Installation Guide 2-11

Chapter 2: INSTALLATION REQUIREMENTS/SPECIFICATIONS

REPEATER FUNCTIONALITY (cont.)

Table 2-5. Delay Times (Port x In to Port x Out)

Port In to

Port Out

TPRMIM-33
TPRMIM-36
TPRMIM-20
TPRMIM-22

Twisted
Pair to
Twisted
Pair

Twisted
Pair to
EPIM/AUI

EPIM/AUI
to Twisted
Pair

CXRMIM Coaxial to

Coaxial
Coaxial to

EPIM

Start of

Packet

Collision to

Jam

Cessation

of Jam

1.02 µs 1.26 µs 1.40 µs

.8642 µs 1.16 µs 1.13 µs

.685 µs .570 µs 1.23 µs

1.30 µs 1.4 µs 1.20 µs

1.20 µs 1.30 µs 1.10 µs

EPIM to
Coaxial

1.00 µs 700 ns 500 ns

FORMIM-22 Fiber Optic

to

1.10 µs 900 ns 800 ns

Fiber Optic

2-12 Repeater MIM

OPERATING SPECIFICATIONS

LED INDICATORS

Table 2-6. LED Descriptions

LED Name RMIM/EPIM Description

Ethernet B, C TPRMIM-33/36

TPRMIM-20/22

CXRMIM
FORMIM

CLN

(Collision)

TPRMIM-33/36
TPRMIM-20/22

CXRMIM
FORMIM

RCV

(Receive)

TPRMIM-33/36
TPRMIM-20/22

CXRMIM
FORMIM

When lit, indicates that the RMIM is
operating on either the Ethernet B or
C channel on the FNB. If neither of
the LEDs are lit, the RMIM is in
stand-alone mode.

When flashing, indicates that a colli­sion has occurred on one or more of
the segments attached to the RMIM.
Collisions occur normally on an
Ethernet network, so a flashing LED
does not necessarily indicate an
error condition. The frequency of
flashes may increase as network
activity increases.

When flashing, indicates that the
port is receiving a data packet from
the attached segment. The fre­quency of flashes may increase as
network activity increases.

LNK

(Link)

POK

(Port OK)

FORMIM

EPIM-F1, F2, F3

EPIM-T
TPRMIM-33/36
TPRMIM-20/22

CXRMIM

TPRMIM-33/36

When lit, indicates a link signal has
been received from the device on
the other end of the segment. The
LED remains lit as long as the link is
maintained.

When lit, indicates the port is not
segmented.

TPRMIM-20/22

PWR

(Power)

EPIM-A When lit, indicates that the EPIM-A

is providing power to the transceiver
that is connected to it.

SQE EPIM-X When lit, indicates that the internal

transceiver’s SQE test is enabled.
When unlit, the test is disabled.

Installation Guide 2-13

Chapter 2: INSTALLATION REQUIREMENTS/SPECIFICATIONS

ENVIRONMENTAL REQUIREMENTS

Operating temperature: +5° to +40°C (41° to 104°F)
Non-operating temperature: -30° to +80°C (-22° to 176°F)

Operating humidity: 5 to 95% (non-condensing)

PHYSICAL

Dimensions: 34.04 D x 29.21 H x 5.08 W cm

(13.4 D x 11.5 H x 2.0 W in)

2-14 Repeater MIM

CHAPTER 3

INST ALLING THE RMIM

This chapter explains how to set the RMIM jumpers and install RMIMs into the
MMAC/FNB. It also provides instructions for connecting network segments to
the RMIM ports and to the available Ethernet Port Interface Modules (EPIMs).
Ensure that your network meets the guidelines and requirements listed in Chapter
2, Installation Requirements/Specifications, before installing the RMIMs.

Sections of this Chapter follow:

• Unpacking the RMIM

• Setting the RMIM Jumpers

• Installing the RMIM into the MMAC

• Connecting the RMIM to the Network

3.1 UNP A CKING THE RMIM

To unpack the RMIM:

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

2. Carefully remove the RMIM from the shipping box. Leave the RMIM in its
conductive bag until you are ready to install it.

3. Visually inspect the RMIM. If it appears damaged, contact Cabletron
Systems Technical Support immediately.

Installation Guide 3-1

Chapter 3: INSTALLING THE RMIM

3.2 SETTING THE RMIM JUMPERS

Each RMIM has two Ethernet jumpers and one Unmanaged Module Group
(Subnet) jumper.

Figure 3-1 shows the location and jumper number for each RMIM.

Ethernet Jumpers

JP1 (CXRMIM, FORMIM)
JP6 (TPRMIM-20/22/33/36)

ETH. B
ETH. C

STND ALONE
ETH. B/C

ETHERNET JUMPER SETTINGS

JP2 (CXRMIM, FORMIM)
JP7 (TPRMIM-20/22/33/36)

SUBNET DISABLED
(FACTORY DEFAULT)

SUBNET B/C

Unmanaged Module Group

(Subnet) Jumper

JP4 (CXRMIM, FORMIM)
JP8 (TPRMIM-20/22/33/36)

ETH. B
ETH. C

STND ALONE
ETH. B/C

Jumper Settings for operating

on Ethernet B (Default Setting)

UNMANAGED MODULE GROUP (SUBNET) JUMPER SETTINGS

SUBNET DISABLED
(DEFAULT SETTING)

Figure 3-1. RMIM Jumper Configurations

3-2 Repeater MIM

ETH. B
ETH. C

STND ALONE
ETH. B/C

Jumper Settings for

operating on Ethernet C

SUBNET ENABLED

ETH. B
ETH. C

STND ALONE

ETH. B/C

Jumper Settings for

Stand Alone Operation

SETTING THE RMIM JUMPERS

3.2.1 Setting the Ethernet Jumpers

The Ethernet jumpers determine how your RMIM operates on the network. You
can set the jumpers so that the RMIM operates on Ethernet B, Ethernet C, or in
stand-alone mode.

Refer to Figure 3-1 and configure the RMIM jumpers as follows:

• To operate on Ethernet B: Place the JP1/JP6 jumper over the center pin and
the ETH. B pin, and place the JP2/JP7 jumper over the center pin and the
ETH. B/C pin.

• To operate on Ethernet C: Place the JP1/JP6 jumper over the center pin and
the ETH. C pin, and place the JP2/JP7 jumper over the center pin and the
ETH. B/C pin.

• To operate in stand-alone mode: Place the JP2/JP7 jumper over the center
pin and the STAND ALONE pin.

If you use an EMME or an EMM-E6 to manage the RMIM, the

NOTE

EMME or EMM-E6 management software settings will take priority
over the RMIM hardware jumper settings.

3.2.2 Setting the Unmanaged Module Group (Subnet) Jumper

RMIMs allow grouping of the B and C channels into unmanaged modules to
provide two additional Ethernet networks. These additional networks cannot be
seen or controlled from the EMME or EMM-E6 installed in the MMAC-FNB.

When using the Unmanaged Module Group Jumper, the EMME and EMM-E6
will not bridge/route packets to or from the RMIM with the enabled jumper or any
RMIMs to the left of the jumpered RMIM. Setting this jumper breaks the
backplane into a separate network containing the RMIM with the enabled jumper
and all RMIMs to the left of that jumpered RMIM. The channel B RMIMs will
only talk to any RMIM that is set to channel B and the channel C RMIMs will only
talk to any RMIM that is set on channel C.

Setting the Unmanaged Module Group jumper for more than one RMIM breaks
the backplane of the FNB into another separate unmanaged grouped network.

Installation Guide 3-3

Chapter 3: INSTALLING THE RMIM

To place an RMIM into an unmanaged module group:

1. On only one RMIM, (even if more than one RMIM is to be in this group)
place the subnet jumper (JP8 on the TPRMIMs or JP4 on the CXRMIM and
FORMIM) in the ENABLE position as shown in Figure 3-1.

2. The jumper must be in the DISABLE position for any other MIMs included
in this unmanaged group.

3. Install the MIMs into the MMAC. The MIM with the subnet jumper enabled
in step 1 must be installed closest to the EMME or EMM-E6 as shown in
Figure 3-2.

You must install MIMs that are not in the unmanaged module group

NOTE

closest to the EMME or EMM-E6. Install unmanaged MIMs next,
followed by all non-repeater RMIMs. Figure 3-2 shows the correct
sequence.

Unmanaged Module Group
Subnet jumper set on this MIM only

E
M
M
E

Non-Repeater MIMs

Unmanaged MIMs

Figure 3-2. Location of MIMs in the MMAC

Managed Repeater MIMs

3-4 Repeater MIM

INSTALLING THE RMIM INTO THE MMAC

3.3 INSTALLING THE RMIM INTO THE MMAC

The RMIM must be installed in an MMAC equipped with a Flexible Network
Bus (either an MMAC-3FNB, MMAC-5FNB or an MMAC-8FNB).

The FNB is a full-height, full-width backplane that links Cabletron

NOTE

Systems Ethernet, FDDI or Token Ring products. Upgrades kits for
MMAC-3s and MMAC-8s (without an FNB) are currently
available. Contact Cabletron Systems Technical Support for more
information.

Two types of MMACs currently support FNB architecture — shunting and non­shunting. Shunting MMAC-FNBs allow modules to continue communicating on
their perspective buses, regardless of whether there is an empty slot between
them in the chassis.

The following table lists the part numbers of the MMAC chassis that have
shunting capabilities.

Table 3-1. MMACs with Shunting Capabilities

MMAC Chassis Part #

MMAC-3FNB FC000000000 or above
MMAC- 5FNB CC000000000 or above
MMAC-8FNB CG000000000 or above
MMAC-M3FNB all
MMAC-M5FNB all
MMAC-M8FNB DK000000000 or above

Installation Guide 3-5

Chapter 3: INSTALLING THE RMIM

Cabletron has designed the RMIMs to be easily installed into the MMAC/FNB.
When you install the module, the following guidelines must be followed:

• You cannot install the RMIM into Slot 1 (first slot), which is reserved for the
Ethernet Management Module (EMME or EMM-E6), the IRM, IRM2,
IRM3, or IRBM.

The RMIMs can only be managed by an EMME or EMM-E6. You

NOTE

can install an IRM, IRM2, IRM3, or an IRBM into slot 1 to manage
other boards in your MMAC, but it will not provide any
management for the repeater modules.

• If an EMME or EMM-E6 management module is installed in an MMAC
with a non-shunting backplane, all RMIMs used in the chassis must be
installed next to it.

• If installing Token Ring or FDDI modules, they must be installed to the left
of all installed RMIMs.

• When installing an RMIM into an MMAC/FNB, be sure the required power
supply module is installed in the MMAC to provide power to the module.

Install the RMIM into the MMAC as follows:

1. Slide the module (Fig. 3-3) into the MMAC’s card cage. Be sure that the
card is in the top and bottom slots of the case.

2. Secure the module to the MMAC by turning the knurled knobs. Be sure the
module is firmly attached to the MMAC by turning the knurled knobs. Failure
to do so may result in improper operation.

3-6 Repeater MIM

MMAC-M8FNB

INSTALLING THE RMIM INTO THE MMAC

Repeater MIM

FORMIM-22

Knurled

Knobs

Board Slot 2

Figure 3-3. Installing the RMIM

3.3.1 Installing an EPIM

The CXRMIM and the TPRMIMs provide a slot for one of Cabletron’s Ethernet
Port Interface Modules (EPIMs). EPIMs allow you to connect a variety of media
to your RMIM. This section explains how to install an EPIM into an RMIM.

Install the EPIM into the RMIM as follows:

1. Remove the blank cover plate from the EPIM slot.

2. Slide the EPIM you are installing into the EPIM slot (Fig. 3-4). Be sure that

the card is in the top and bottom guides of the slot.

3. Press the EPIM in place until the EPIM faceplate is flush with the faceplate

of the MIM.

4. When the EPIM is firmly in place, tighten the small knurled screw to secure

the EPIM to the RMIM.

Installation Guide 3-7

Chapter 3: INSTALLING THE RMIM

CXRMIM

ETHERNET

3-8 Repeater MIM

Figure 3-4. Installing an EPIM

CONNECTING THE RMIM/EPIM TO THE NETWORK

3.4 CONNECTING THE RMIM/EPIM TO THE NETWORK

This section describes the types of connections for each RMIM and EPIM. Refer
to the appropriate section for instructions that apply to your RMIM/EPIM.

3.4.1 Attaching Thin-Net Segments to the CXRMIM

The CXRMIM has 12 BNC connectors to accommodate 12 10BASE-2 or
10BASE-5 coaxial segments. Connect the thin-net segment to the CXRMIM as
follows:

1. Attach the thin-net segment to each of the CXRMIM BNC ports as shown in

Figure 3-5. Line up the slots with the pins, push the connector in, and turn
clockwise to lock on.

RCV POK

RCV POK

CXRMIM
Coaxial Port

Thin-Net

Cable

With BNC

Connector

Figure 3-5. Attaching a Thin-Net Segment

2. Check that the device at the other end of the segment has power.

3. Check the Port OK (POK) LED for each port to ensure that the port is not

segmented.

You can connect a thick coaxial segment to the CXRMIM by using

NOTE

a thick to thin barrel connector. However, do not extend the thick
coaxial segment with a thin coaxial segment.

If communication cannot be established, contact Cabletron Systems Technical
Support.

Installation Guide 3-9

Chapter 3: INSTALLING THE RMIM

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

To connect a thin-net segment to an EPIM-C:

1. Set the Internal Termination Switch (Fig. 3-6), located 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 if the thin-net segment will not be terminated at the

port or externally terminated.

On

!

CAUTION

Off

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

Figure 3-6. Internal Termination Switch

Do not double terminate your RMIM by internally terminating the
EPIM-C port and terminating the thin-net segment with a tee­connector and a terminator.

3-10 Repeater MIM

CONNECTING THE RMIM/EPIM TO THE NETWORK

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.

on

off

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

Figure 3-7. Connecting a Thin-Net Segment to an EPIM-C

Internal Termination Switch in ON Position

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 3-7.

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.

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

connector on the tee-connector.

Installation Guide 3-11

Chapter 3: INSTALLING THE RMIM

3.4.3 Attaching a Twisted Pair Segment to the TPRMIM-20/22

The TPRMIM-20 has nine RJ45 unshielded twisted pair ports (UTP) and the
TPRMIM-22 has twenty-one RJ45 UTP ports. The TPRMIM-20 and
TPRMIM-22 have a Polarity Correction and Detection feature which allows
packets to pass even if the polarity of the twisted pairs segment’s receive link is
reversed. A flashing LNK LED indicates reverse polarity.

To attach twisted pair segments to the network ports:

1. Insert the RJ45 connector from each twisted pair segment into the desired
network port on the RMIM as shown in Figure 3-8.

2

X

3

X

4

X

Figure 3-8. TPRMIM-20/22 Network Ports

2. At the device end of a segment, attach the segment to a 10BASE-T compliant
Ethernet device.

3. Check that the Link light on the 10BASE-T Ethernet device and the LNK
LED on the TPRMIM 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 MMAC have power.

b. Verify the cabling between the TPRMIM and the device.

c. Check the cable for continuity.

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

3-12 Repeater MIM

CONNECTING THE RMIM/EPIM TO THE NETWORK

3.4.4 Attaching a Twisted Pair Segment to the TPRMIM-33/36

The TPRMIM-33 has a 50-pin Champ connector and the TPRMIM-36 has two 50­pin Champ connectors. This configuration of the TPRMIM allo ws you to run a 50­pin feeder cable from the TPRMIM to a Punch Down block. Each Champ connec­tor can accommodate twelve 10BASE-T, twisted pair segments.

Refer to Appendix A for information about wiring the

NOTE

TPRMIM-33/36 to a Punch Down Block.

The TPRMIM-33 and TPRMIM-36 have a Polarity Correction and Detection
feature which allows packets to pass even if the polarity of the twisted pairs
segment’s receive link is reversed. A flashing LNK LED indicates reverse
polarity.

13

2

Figure 3-9. 50-Pin Champ Connector

Installation Guide 3-13

Chapter 3: INSTALLING THE RMIM

To connect the TPRMIM-33/36 into an existing twisted pair wiring system:

1. Connect a 50-pin feeder cable to the Champ connector on the TPRMIM. See
Figure 3-9.

2. Attach the feeder cable to the Punch Down Block, or patch panel. If using a
TPRMIM-36, a second 50-pin feeder cable can be connected to the RMIM.

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.

4. Check that the Link light on the 10BASE-T Ethernet device and the LNK
LED on the TPRMIM are lit. If the LEDs are unlit, perform each of the
following steps until the LEDs are lit:

a. Check that the 10BASE-T device and the MMAC have power.

b. Verify the cabling between the module and the 10BASE-T device.

c. Check the cable for continuity.

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

3.4.5 Connecting a Twisted Pair 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 o ver the
RJ45 port. Refer to Figure 3-10 to properly set the EPIM-T cross-over switch.

3-14 Repeater MIM

Position X
(crossed over)

CONNECTING THE RMIM/EPIM TO THE NETWORK

1. RX+

2. RX-

3. TX+

4. NC

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 3-10. Connecting a Twisted Pair Segment to an EPIM-T

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

1. Connect the twisted pair segment (Fig. 3-10) to the module by inserting the
RJ45 connector on the twisted pair segment into the RJ45 port on the
module.

2. Check that the Link LED for the port is lit. If the LED is not lit, 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. See Figure 3-10.

c. Check the cable for continuity.

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

specifications outlined in 10BASE-T Twisted Pair Network
Requirements.

If a link still isn’t established, contact Cabletron Systems Technical Support.

Installation Guide 3-15

Chapter 3: INSTALLING THE RMIM

3.4.6 Connecting a Fiber Optic Link Segment to a FORMIM,
EPIM-F1, EPIM-F2, or EPIM-F3

When connecting a fiber optic link segment to a FORMIM, EPIM-F1 or an
EPIM-F2, you must 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 connecting a fiber optic link segment with ST connectors to a FORMIM,

EPIM-F2 or EPIM-F3 with ST ports, keep in mind that ST connectors attach
to ST ports much like BNC connectors attach to BNC ports. The connector
is inserted into the port with the alignment key inserted into the alignment
slot on the port. The connector is then turned to lock it down.

• 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 is connected to
the Receive port of a fiber optic Ethernet device at the other end of the
segment (i.e., TX of the applicable port on the module goes to RX of the fiber
optic device). The Receive strand of the applicable port on the module is
connected to the Transmit port of the fiber optic Ethernet device (i.e., RX of
the applicable port on the module goes to TX of the 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 have labeled your cable in the described manner.

3-16 Repeater MIM

CONNECTING THE RMIM/EPIM TO THE NETWORK

Do not touch the ends of the fiber optic strands, and do not let the
ends come in contact with dust, dirt, or other contaminants.

!

CAUTION

To connect a fiber optic link segment to a FORMIM, 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 (Fig. 3-11) to the applicable receive port, labeled
RX, on the module.

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.

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.

6. Check that the Link LED on the applicable port on the module is lit. If the
LED is unlit, 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 that the fiber strands are properly “crossed over” 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 Fiber Optic Network Requirements.

If a link still isn’t established, contact Cabletron Systems Technical Support.

Installation Guide 3-17

Chapter 3: INSTALLING THE RMIM

FORMIM-22
ST Fiber Optic Ports

ST Connectors

EPIM-F1/F2
With ST Fiber Optic Connectors

ST Connectors

SMA 905 Connectors

EPIM-F1/F2

SMA 906 Connectors w/

Half Alignment Sleeves

EPIM-F3

ST Connectors

Figure 3-11. Connecting a Fiber Optic Link Segment to a FORMIM,

EPIM-F1, EPIM-F2, or EPIM-F3

3-18 Repeater MIM

CONNECTING THE RMIM/EPIM TO THE NETWORK

3.4.7 Connecting an AUI Cable to an EPIM-A or EPIM-X

The EPIM-A allows you to connect the module to a variety of Ethernet
transmission media via an external transceiv er , including twisted pair , fiber optic,
and/or thick or thin Ethernet coaxial cable.

The EPIM-X has internal transceivers that allo w you to use AUI cable to connect
directly to another Ethernet device without using an external transceiver.

If you are connecting to an EPIM-A, be sure to disable the SQE test
function on the transceiver you will be connecting to the AUI port;

!

CAUTION

if you are using an EPIM-X, use the switch on the EPIM (Figure 3-

12) to disable the SQE test. Failure to disable the SQE test will
result in improper operation of the RMIM. Refer to the applicable
transceiver manual.

ON Position
(Toward Back
of EPIM)

ON

OFF

OFF Position
(Toward Front
of EPIM)

Figure 3-12. EPIM-X SQE Switch

To connect to the network via the AUI port:

1. If using an EPIM-A, attach an external transceiver to the segment to which
the AUI Port will be attached. Refer to the applicable transceiver manual.

2. Attach the female end of an AUI cable, no more than 50 meters in length, to
the transceiver.

3. Attach the male connector on the AUI cable (Fig. 3-13) to the AUI port on
the TPRMIM-36, or EPIM-A.

Installation Guide 3-19

Chapter 3: INSTALLING THE RMIM

4. If using an EPIM-X, connect the female end of the cable to the EPIM-X and
the male end to the AUI connector on the device.

5. Move the slide latch on the AUI Port to secure it to the lock post on the AUI
connector.

Figure 3-13. Connecting an AUI Cable to an AUI Port

3-20 Repeater MIM

CHAPTER 4

TESTING THE RMIMS

This chapter contains procedures to test the RMIMs with the EMME or EMM-E6
prior to making network connections, and again after installation.

4.1 PRE-INST ALLA TION TEST

Before installing the RMIM in a live network, test the module in a controlled
situation to ensure that it is repeating packets. This test requires an EMME or
EMM-E6 and an RMIM installed in an MMAC/FNB. You perform the test with
two workstations (Fig. 4-1).

1. Install the EMME or EMM-E6 and the RMIM (TPRMIM, FORMIM, or

CXRMIM) into a stand-alone MMAC/FNB.

2. Connect the first workstation to either the RMIM, using the appropriate cable

and transceiver, or to the EMME/EMM-E6 via the active repeater port, using
a transceiver and the appropriate cable.

The AUI 1 port is the default active repeater port for the EMME (as

NOTE

is the EPIM 1 port for the EMM-E6). If you want to test modules
using the AUI 2 port (EMME) or the EPIM 2 port (EMM-E6), you
must use local management. See your local management guide for
details.

3. Connect the second workstation to the RMIM you are testing, using the

appropriate transceivers and cable.

4. Set the first workstation as the file server and the second as the client (refer

to the workstation documentation for setting up the workstations as file server
and client). When the workstations are properly set up, proceed to send
packets between the workstations and verify that the module is operating
properly.

If failures occur, contact Cabletron’s Technical Support.

Installation Guide 4-1

Chapter 4: TESTING THE RMIMS

If using UNIX® workstations, a “ping” test will verify that the

NOTE

RMIM is operating properly.

t

TPRMIM-33

EMME

MMAC-3FNB

TPT

Figure 4-1. Pre-installation Test

4.2 INSTALLATION CHECK-OUT

After the EMME/EMM-E6 is connected to the network, verify that packets can
be passed between the two Ethernet network segments via the EMME/EMM-E6.
Again you can use two workstations set up as file server and client. Keep the
server workstation stationary in the wiring closet with the EMME/EMM-E6, and
use the client workstation to move around to each node that is connected to the
RMIM (Figure 4-2).

4-2 Repeater MIM

INSTALLATION CHECK-OUT

1. After the EMME/EMM-E6 and RMIM are installed in the MMAC, connect

the server workstation to either the RMIM, using the appropriate cable and
transceiver, to the EMME AUI port using a transceiver and an AUI cable, or
to the EMM-E6 EPIM port using a transceiver and the appropriate cable.

2. Going to each node connected to the MMAC, connect the client workstation

and proceed to test the segment.

If failures occur, contact Cabletron Systems Technical Support.

MMAC3/FNB with EMME and TPRMIM

t

MMAC-3FNB

TPRMIM-33

EMME

Office Locations

Client Workstation

Figure 4-2. Installation Check-Out

TPT

File Server Workstation

Installation Guide 4-3

Chapter 4: TESTING THE RMIMS

Table 4-1. LANVIEW LEDs

LED Name RMIM/EPIM Description

Ethernet B, C TPRMIM-33/36

TPRMIM-20/22

CXRMIM
FORMIM

CLN

(Collision)

TPRMIM-33/36
TPRMIM-20/22

CXRMIM
FORMIM

RCV

(Receive)

TPRMIM-33/36
TPRMIM-20/22

CXRMIM
FORMIM

When lit, indicates that the RMIM is
operating on either the Ethernet B
or C channel on the FNB. If neither
of the LEDs are lit, the RMIM is in
stand-alone mode.

When flashing, indicates that a colli­sion has occurred on one or more of
the segments attached to the RMIM.
Collisions occur normally on an
Ethernet network, so a flashing LED
does not necessarily indicate an
error condition. The frequency of
flashes may increase as network
activity increases.

When flashing, indicates that the
port is receiving a data packet from
the attached segment. The fre­quency of flashes may increase as
network activity increases.

LNK

(Link)

POK

(Port OK)

FORMIM

EPIM-F1, F2, F3

EPIM-T
TPRMIM-33/36
TPRMIM-20/22

CXRMIM

TPRMIM-33/36

When lit, indicates a link signal has
been received from the device on
the other end of the segment. The
LED remains lit as long as the link is
maintained.

When lit, indicates the port is not
segmented.

TPRMIM-20/22

PWR

(Power)

EPIM-A When lit, indicates that the EPIM-A

is providing power to the transceiv er
that is connected to it.

SQE EPIM-X When lit, indicates that the internal

transceiver’s SQE test is enabled.
When unlit, the test is disabled.

4-4 Repeater MIM

INSTALLATION CHECK-OUT

FORMIM-22

SN

ETHERNET

RCV LNK

TX
RX

RCV LNK

TX
RX

RCV LNK

TX
RX

RCV LNK

TX
RX

RCV LNK

7

RCV LNK

8

RCV LNK

9

RCV LNK

10

B C

CLN

CXRMIM

TPRMIM-33

SN SN

ETHERNET

RCV

B C

CLN
POK

1

1

2

POKRCV POKRCV

8

3

2

ETHERNET

1

2
3
4
5
6
7
8

9
10
11
12
13

B C

CLN

RCV POK

L

R

N

C

K

V

1

9

3

TPRMIM-36

SN

ETHERNET

CLN

14

RCV POK

15
16
17
18
19
20
21
22
23
24
25
26

L

R

N

C

K

V

14

1

2
3
4
5
6
7
8

9
10
11
12
13

B C

CLN

RCV POK

L

R

N

C

K

V

1

4

7

4

TPRMIM-20

ETHERNET

B C

LNK

LNK

RCV

RCV

6
7
8
9

10

CLN
POK

X

X

X

1
2
3
4
5

E
P

I

M

2

3

4

TPRMIM-22

LNK
RCV

11
12
13
14
15
16
17
18
19
20
21
22

Figure 4-3. RMIM LEDs

ETHERNET

CLN

6
7
8
9

10

11

X

12

X

13

X

14

X

15

X

16

X

LNK
RCV

LNK
RCV

B C

CLN
POK

1
2
3
4
5

E
P

I

M

2
X

3
X

4
X

Installation Guide 4-5

Chapter 4: TESTING THE RMIMS

Figure 4-4. EPIM LEDs

4-6 Repeater MIM

APPENDIX A

TWISTED PAIR 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 on page A-9) to wire your twisted
pair segments. The following tables are included in this appendix:

• Table A-1 Twisted Pair Wiring from a TPRMIM-33/36 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

Pins 25 and 50 on Champ connector are not used.

NOTE

Installation Guide A-1

Appendix A: Twisted Pair Wiring Tables

Table A-1. Twisted Pair Wiring

from a TPRMIM-33/36 to a Punch Down Block

From
TPRMIM

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/Orange TX+ A43 Violet/Orange TX+
TX- 22 22 Orange/Violet TX- A44 Orange/Violet TX-

Into and Out of 50-Pin
Feeder Cable

Into Punch Down
Block

Port 10/22

Pin Pin Pin
RX+ 44 44 Yellow/Brown RX+ A37 Yellow/Brown RX+
RX- 19 19 Brown/Yellow RX- A38 Brown/Yellow RX­TX+ 45 45 Yellow/Gray TX+ A39 Y ello w/Gra y TX+
TX- 20 20 Gray/Yellow TX- A40 Gray/Yellow TX-

Port 9/21

Pin Pin Pin
RX+ 42 42 Yellow/Orange RX+ A33 Yellow/Orange RX+
RX- 17 17 Orange/Yellow RX- A34 Orange/Yellow RX­TX+ 43 43 Yellow/Green TX+ A35 Yellow/Green TX+
TX- 18 18 Green/Y ellow TX- A36 Green/Yellow TX-

A-2 Repeater MIM

Twisted Pair Wiring Tables

Table A-1. Twisted Pair Wiring

from a TPRMIM-33/36 to a Punch Down Block (Continued)

From
TPRMIM

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-

Into and Out of 50-Pin
Feeder Cable

Into Punch Down
Block

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/Orange TX+
TX- 12 12 Orange/Black TX- A24 Orange/Black TX-

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-

Installation Guide A-3

Appendix A: Twisted Pair Wiring Tables

Table A-1. Twisted Pair Wiring

from a TPRMIM-33/36 to a Punch Down Block (Continued)

From
TPRMIM

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-

Into and Out of 50-Pin
Feeder Cable

Into Punch Down
Block

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-

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/Orange TX+
TX- 2 2 Orange/White TX- A4 Orange/White TX-

A-4 Repeater MIM

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

To RJ45
Wallplate

Into
Office
Drop

Into
10BASE-T
Device

B37 Yellow/Brown RX+ 1 TX+ 1 TX+ 1 TX+
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-

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- 6 RX- 6 RX- 6 RX-

Installation Guide A-5

Appendix A: 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 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+
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

To RJ45
Wallplate

Into
Office
Drop

Into
10BASE-T
Device

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-

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-

A-6 Repeater MIM

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 2/14 Pin Pin Pin

B5 White/Green RX+ 1 TX+ 1 TX+ 1 TX+
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-

To RJ45
Wallplate

Into
Office
Drop

Into
10BASE-T
Device

Installation Guide A-7

Appendix A: 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

P
P

P
P

P
P

:
:

:
:
:
:

:
:
:
:
:

P
P

P
P

PIN 1 TX+
P

P
P

P
P

P
P

:
:

:
:
:
:

:
:
:
:
:

P
P

P
P

{

25 Pin

r

{

25 Pin

r

{

25 Pin

r

{

4 Pair

{

4 Pair

{

4 Pair

{

Office

{

Office

{

Office

Table A-3. Twisted Pair Wiring Summary

TPRMIM
Champ

8 RX+
3 RX-

9 TX+
4 TX-

ort 11

6 RX+
1 RX-

7 TX+
2 TX-

Feede

Cable

Feede

Cable

Punch Down
Block

{

46 RX­47 TX+

48 TX-

41 RX+

{

42 RX­43 TX+

44 TX-

Distribution

Distribution

Twisted

Cable

Twisted

Cable

Wall Plate
(If Required)

{

IN 2 TX­IN 3 RX+

IN 6 RX+

IN 1 TX+

{

IN 2 TX­IN 3 RX+

IN 6 RX-

10BASE-T
Ethernet
Device

{

IN 2 TX-

Drop

IN 3 RX+
IN 6 RX+

IN 1 TX+

{

IN 2 TX-

Drop

IN 3 RX+
IN 6 RX-

ort 1

6 RX+
RX-

7 TX+
TX-

Feede

Cable

{

1 RX+
2 RX-

3 TX+
4 TX-

Twisted

Distribution

Cable

IN 1 TX+

{

IN 2 TX­IN 3 RX+

IN 6 RX-

Drop

IN 1 TX+

{

IN 2 TX­IN 3 RX+

IN 6 RX-

A-8 Repeater MIM

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

Installation Guide A-9

Figure A-1. Punch Down Block

Appendix A: Twisted Pair Wiring Tables

A-10 Repeater MIM

APPENDIX B

EPIM SPECIFICATIONS

The TPRMIM-20/22/33/36 and CXRMIM provide a port for Cabletron Systems’
EPIMs. EPIMs let you connect to the main network using different media types.
Cabletron Systems offers a variety of EPIMs. The following sections explain
specifications for each EPIM.

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 B-1 sho ws
the pinouts for the EPIM-T in both cross-over positions.

Position X
(crossed over)

1. RX+

2. RX-

3. TX+

4. NC

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 B-1. EPIM-T Pinouts

Installation Guide

B-1

Appendix B:

EPIM Specifications

EPIM-F1 and EPIM-F2

The EPIM-F1 and EPIM-F2 support Multimode Fiber Optic cabling. Each EPIM
has an internal Cabletron Systems FOT-F™ Fiber Optic Transceiver. The EPIM­F1 is equipped with SMA Connectors and the EPIM-F2 is equipped with ST
Connectors. Figure B-2 shows both EPIMs. Specifications for the EPIMs are
listed below.

Figure B-2. 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

B-2

Repeater MIM

EPIM Specifications

The transmitter power levels and receive sensitivity levels listed are

NOTE

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).

EPIM-F3

The EPIM-F3 supports Single Mode Fiber Optic cabling. It has an internal
Cabletron Systems FOT-F™ Fiber Optic Transceiver and is equipped with ST
Connectors. Figure B-3 shows the EPIM-F3. Specifications for the EPIM-F3 are
listed below.

Transmitter Power decreases as temperatures rise and increases as

NOTE

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° C is -

16.4 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).

Installation Guide

Figure B-3. EPIM-F3

B-3

Appendix B:

r

)

C

Receive

Sensitivity

Maximum

Receive

Input Power

EPIM Specifications

Maximum Sensitivity (-36.0)

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)

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

dBm

Less Powe

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

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

The transmitter power levels given above are Peak Power Levels

NOTE

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).

B-4

Repeater MIM

EPIM Specifications

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 B-4 shows the
setting for the terminator switch.

On

Off

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

Figure B-4. EPIM-C

Connector Type

BNC receptacle, with gold center contact, for use with BNC type tee-connectors
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.

Installation Guide

B-5

Appendix B:

EPIM Specifications

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 attach segments to an AUI cable. Figure B-5 sho ws
both modules.

Figure B-5. 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
8 Logic Ref.

Connector Shell: Protective Ground

B-6

Repeater MIM

INDEX

A

AUI Connector 2-6, 3-19, 3-20, B-6

C

Cable Requirements 2-1
Champ Connector Pinout 2-8
Champ Connector Specifications for the TPRMIM-33/36 2-7
Connecting the RMIM/EPIM to the network 3-9
CXRMIM 1-1, 3-9

Coaxial Connector Specifications 2-9

D

DOC Notice ii

E

EMME 1-6, 3-3, 3-4
EMM-E6 1-8, 3-4, 3-6
Environmental Requirements 2-14
EPIM LEDs 4-6
EPIM Specifications B-1
EPIM-A and EPIM-X (AUI Port) B-6

Connecting an AUI cable 3-19, 3-20

EPIM-C B-5

Connecting a Thin-Net Segment 3-9, 3-10, 3-11
EPIM-F1 and EPIM-F2 3-16, 3-17, 3-18, B-2
EPIM-F3 3-16, 3-17, 3-18, B-3
EPIM-T B-1

Connecting a Twisted Pair Segment 3-14, 3-15
Ethernet Jumpers for the CXRMIM, FORMIM, TPRMIM 3-2, 3-3
Ethernet Port Interface Modules (EPIM) 1-5, 3-7, 3-8, B-1

F

FCC Notice ii
Fiber Optic Link Segment 3-16
FORMIM-22 1-1, 2-10, 3-16

ST Connector Specifications 2-9, 3-18

Installation Guide Index-1

Index

H

Help

Cabletron Technical Support 1-2
Manuals 1-9

I

Installation Check-out 4-2
Installing an EPIM 3-7, 3-8
Installing the RMIM 3-1
Installing the RMIM into the MMAC 3-5
Installation Requirements 2-1

J

Jumper Settings for the CXRMIM, FORMIM, TPRMIM 3-2

L

LANVIEW LEDs 1-5, 4-4, 4-5
LED Indicators 2-13, 4-5

M

Manuals 1-9
MMAC 1-6, 3-4, 3-5

N

Network Requirements 2-1
10BASE-2 Thin-Net 2-1

10BASE-T Twisted Pair 2-2
FOIRL/10BASE-FL Multimode Fiber 2-4
FOIRL/10BASE-FL Single Mode Fiber 2-5

O

Operating Specifications 2-11

P

Physical Specifications 2-14
Pre-Installation Test 4-1
Punch Down Block A-9

Index-2 Repeater MIM

R

Repeater Functionality 2-11, 2-12
RJ45 Connector 2-7
RMIM

Features 1-4

Functionality 1-4, 2-11

LEDs 4-6

Network Port Specifications 2-7

Operating Specifications 2-11

Overview 1-3
Remote Management 1-5

S

Stand-alone Capability 1-4, 3-2, 3-3
ST Connector Specifications 2-9, 3-18
Subnet Jumpers for the CXRMIM, FORMIM, TPRMIM 3-2, 3-3

Index

T

Testing the RMIMs 4-1
Thin-Net Segment 3-9, 3-10, 3-11
TPRMIM-20/22 1-1

Attaching a Twisted Pair Segment 3-12
TPRMIM-33/36 1-1

Attaching a Twisted Pair Segment 3-13

Champ Connector Specifications 2-7

Transceiver/AUI Requirements 2-6
Twisted Pair Segment 3-12
Twisted Pair Wiring Tables A-1

TPRMIM-33/36 to a Punch Down Block A-2

Punch Down Block to a 10Base-T Device A-5

Twisted Pair Wiring Summary A-8

U

Unmanaged Grouped Module 1-4, 3-3
Unpacking the RMIM 3-1

Installation Guide Index-3

Index

Index-4 Repeater MIM