Cabletron Systems MCC-16 User Manual

MCC-16

TOKEN RING

MEDIA CONVERSION CENTER

USER’S GUIDE

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 1997 by Cabletron Systems, Inc. P.O. Box 5005, Rochester, NH 03866-5005
All Rights Reserved
Printed in the United States of America

Order Number: 9032097-02 July 1997

Cabletron, SPECTRUM and
MIM

, and

MMAC

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

are trademarks of Cabletron Systems, Inc.

LANVIEW are registered trademarks of Cabletron Systems, Inc.

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 de vice which are not e xpressly approv ed by the

party responsible for compliance could void the user’s authority to operate the equipment.

Printed on Recycled Paper

i

NOTICE

DOC NOTICE

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

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

VCCI NOTICE

This is a Class A product based on the standard of the Voluntary Control Council for Interference by
Information Technology Equipment (VCCI). If this equipment is used in a domestic environment,
radio disturbance may arise. When such trouble occurs, the user may be required to take corrective
actions.

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

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 LA W. 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

writing, Cabletron makes no warranty, expressed or implied, concerning the Program (including
its documentation and media).

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

WARRANTY. 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 WARRANTIES, IN SOME
INSTANCES THE ABOVE LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO
YOU.

UNITED STATES GOVERNMENT RESTRICTED RIGHTS

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

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

7013. Cabletron Systems, Inc., 35 Industrial Way, Rochester, New Hampshire 03867-0505.

iii

NOTICE

DECLARATION OF CONFORMITY

Application of Council Directive(s):

Manufacturer’s Name:

Manufacturer’ s Address:

European Representative Name:

European Representative Address:

Conformance to Directive(s)/Product Standards:

Equipment Type/Environment:

89/336/EEC
73/23/EEC

Cabletron Systems, Inc.
35 Industrial Way

PO Box 5005
Rochester, NH 03867

Mr. J. Solari
Cabletron Systems Limited

Nexus House, Newbury Business Park
London Road, Newbury
Berkshire RG13 2PZ, England

EC Directive 89/336/EEC
EC Directive 73/23/EEC
EN 55022
EN 50082-1
EN 60950

Networking Equipment, for use in a
Commercial or Light
Environment.

Industrial

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

Manufacturer Legal Representative in Europe
Mr. Ronald Fotino Mr. J. Solari

___________________________________ ___________________________________

Full Name Full Name
Principal Compliance Engineer Managing Director - E.M.E.A.

___________________________________ ___________________________________

Title Title
Rochester, NH, USA Newbury, Berkshire, England

___________________________________ ___________________________________

Location Location

iv

CONTENTS

PREFACE

CHAPTER 1 INTRODUCTION

1.1 MCC-16 Functional Overview......................................................1-2

1.1.1 Speed-Fault Protection...................................................1-3

1.1.2 Active Re-timing With Jitter Reduction Circuitry .............1-3

1.2 Conversion Modules....................................................................1-4

1.2.1 MCC-FRIO...................................................................... 1-4

1.2.2 MCC-DFL........................................................................ 1-4

1.2.3 MCC-CRIO .....................................................................1-5

1.2.4 MCC-D2PM ....................................................................1-5

CHAPTER 2 INSTALLATION

2.1 Installation Considerations .......................................................... 2-1

2.2 Unpacking And Handling The MCC-16 ....................................... 2-2

2.3 Mounting The MCC-16 In A 19-Inch Rack...................................2-3

2.4 Unpacking And Installing The MCC-PS.......................................2-4

2.4.1 Power Supply LEDs........................................................ 2-5

2.4.2 Turning The MCC-16 On And Off...................................2-6

2.5 Unpacking A CM..........................................................................2-6

2.6 Installing A CM ............................................................................ 2-7

2.6.1 Boot-Up Sequence Of LEDs........................................... 2-9

2.7 Resetting A CM ........................................................................... 2-9

2.8 Attaching Cabling ........................................................................ 2-9

2.8.1 Connecting Twisted Pair Cabling.................................. 2-10

2.8.2 Connecting Fiber Optic Cabling.................................... 2-10

2.9 Determining The Station Count.................................................2-11

2.10 Troubleshooting The Network ................................................... 2-12

2.10.1 Checking The MCC-16 .................................................2-12

2.10.2 Checking Lobe And Station Ports.................................2-12

2.10.3 Individual Station Problems ..........................................2-13

2.10.4 Checking RI/RO Ports ..................................................2-14

2.10.5 Checking The Entire Network.......................................2-15

v

CONTENTS

CHAPTER 3 MCC-FRIO SETUP

3.1 Overview Of The MCC-FRIO.......................................................3-2

3.1.1 Token Flow......................................................................3-2

3.2 Setting Switches And Jumpers ....................................................3-3

3.2.1 Selecting The Ring Speed...............................................3-4

3.2.2 Selecting The Fiber Keying Type....................................3-4

3.3 LED Functions .............................................................................3-5

3.3.1 PWR - Power...................................................................3-5

3.3.2 16 Mb - Ring Speed ........................................................3-5

3.3.3 P1 And P2 - Ports............................................................3-6

3.3.4 RI And RO - Ports ...........................................................3-6

CHAPTER 4 MCC-DFL SETUP

4.1 Overview Of The MCC-DFL.........................................................4-2

4.2 Configuring The MCC-DFL ..........................................................4-3

4.2.1 Configuring The RJ45 Port As A Lobe

And The Fiber ST Port As A Station................................4-4

4.2.2 Configuring The RJ45 Port As A Station

And The Fiber ST Port As A Lobe...................................4-5

4.2.3 Configuring The RJ45 Port As RI

And The Fiber ST Port As RO.........................................4-6

4.2.4 Configuring The RJ45 Port As RO

And The Fiber ST Port As RI...........................................4-7

4.3 Selecting The Ring Speeds .........................................................4-8

4.4 Description Of Switches...............................................................4-9

4.4.1 Switch 1...........................................................................4-9

4.4.2 Switch 2...........................................................................4-9

4.4.3 Switch 3.........................................................................4-10

4.4.4 Switch 4.........................................................................4-10

4.5 LED Functions ...........................................................................4-11

4.5.1 PWR - Power.................................................................4-11

4.5.2 16 Mb - Ring Speed ......................................................4-11

4.5.3 P1 And P2 - Ports..........................................................4-12

vi

CONTENTS

CHAPTER 5 MCC-CRIO SETUP

5.1 Overview Of The MCC-CRIO......................................................5-2

5.1.1 Token Flow .....................................................................5-2

5.2 Setting Switches And Jumpers....................................................5-3

5.2.1 Selecting The Ring Speed..............................................5-4

5.2.2 Setting Port Configurations............................................. 5-4

5.3 LED Functions.............................................................................5-6

5.3.1 PWR - Power..................................................................5-6

5.3.2 16 Mb - Ring Speed........................................................ 5-6

5.3.3 P1 And P2 - Ports...........................................................5-7

5.3.4 RI And RO - Ports........................................................... 5-7

CHAPTER 6 MCC-D2PM SETUP

6.1 Overview Of The MCC-D2PM.....................................................6-2

6.1.1 Token Flow .....................................................................6-3

6.2 Setting Jumpers To Configure The CM.......................................6-3

6.2.1 Joining The D2PM Into One Ring...................................6-3

6.2.2 Selecting The Ring Speed(s).......................................... 6-4

6.2.3 Summary Of Jumper Settings......................................... 6-5

6.3 LED Functions.............................................................................6-5

6.3.1 PWR- Power...................................................................6-6

6.3.2 2 Rings - CM Split........................................................... 6-6

6.3.3 16 Mb - Ring Speed(s).................................................... 6-6

6.3.4 P1, P2, P3, And P4 - Ports .............................................6-6

APPENDIX A SPECIFICATIONS

A.1 Environmental Requirements......................................................A-1

A.2 Hardware Specifications..............................................................A-1

A.3 MCC-PS Power Supply Specifications........................................A-2

A.4 Regulatory Compliance...............................................................A-2

vii

CONTENTS

APPENDIX B CABLING

B.1 Trunk Cabling.............................................................................. B-1

B.2 Lobe Cabling............................................................................... B-2

B.2.1 Lobe Port........................................................................ B-2

B.2.2 Station Port.....................................................................B-2

B.3 Requirements And Recommendations ....................................... B-2

B.3.1 Network Performance Requirements.............................. B-3

B.3.2 Signal Interference.......................................................... B-3

B.3.3 Determining The Maximum Signal-Drive Distance.........B-4

B.4 Cable Pinouts.............................................................................. B-4

B.4.1 Station Port Pins.............................................................B-4

B.4.2 Lobe Port Pins................................................................ B-5

B.4.3 RI Port Pins..................................................................... B-6

B.4.4 RO Port Pins................................................................... B-6

B.5 Connecting To An IBM Patch Panel ...........................................B-7

APPENDIX C MEDIA SPECIFICATIONS

C.1 Twisted Pair Copper Cable.........................................................C-1

C.1.1 UTP.................................................................................C-1

C.1.2 STP.................................................................................C-2

C.2 Fiber Optic Cable Specifications.................................................C-3

C.2.1 Multimode.......................................................................C-3

C.2.2 Single-Mode....................................................................C-3

INDEX

viii

PREFACE

Welcome to the

User’s Guide

Token Ring Media Conversion Center (MCC-16)

. This manual describes the capabilities and features,
operating specifications, installation, and troubleshooting procedures of
Cabletron Systems MCC-16 Media Conversion Center.

DOCUMENT CONVENTIONS

The following conventions are used throughout this document:

Bold Italics

publications.

NOTE

TIP

are used to reference Cabletron Systems documents and other

Note

Tip

calls your attention to information of special importance.

gives you a helpful hint concerning procedures or actions.

!

CAUTION

Caution

damage to the equipment, or network configuration settings.

Warning

the presence of an electrical shock hazard.

calls your attention to information essential to avoid

calls your attention to an action that could result in

ix

PREFACE

USING THIS MANUAL

Prior to installing and operating the MCC-16, read this manual
completely to become familiar with its contents and the features of the
MCC-16. This manual assumes the reader has a general working
knowledge of Token Ring (IEEE 802.5) networks.

The manual is organized as follows:
Chapter 1,

Introduction

, provides an overview of the features and

capabilities of the MCC-16 and CMs, and describes the power supplies.
Chapter 2,

Installation

, describes the installation of the MCC-16 chassis
into a 19-inch rack, an MCC-PS power supply into the MCC-16, a CM
into the MCC-16, and cabling into CM ports. The chapter also details the
maximum cable lengths, the maximum station count, and troubleshooting
procedures that can isolate problems.

Chapter 3,

MCC-FRIO Setup

, describes how to configure the

MCC-FRIO CM and explains its LEDs.
Chapter 4,

MCC-DFL Setup

, describes how to configure the MCC-DFL

CM and explains its LEDs.
Chapter 5,

MCC-CRIO Setup

, describes how to configure the

MCC-CRIO CM and explains its LEDs.
Chapter 6,

MCC-D2PM

MCC-D2PM Setup

CM and explains its LEDs.

, describes how to configure the

Appendix A,

Specifications

the CMs, and the MCC-PS power supply.
Appendix B,

Cabling

recommendations to optimize network performance, defines signal
assignments for port pins, and illustrates pinouts to connect to an IBM
patch panel using MIC.

Appendix C,

Media Specifications

performance specifications for different media types used in Token Ring
networks.

x

, describes the specifications of the MCC-16,

, details cabling specifications, provides

, discusses the design and

PREFACE

RECOMMENDED READING

The following publications are recommended if more information is
required regarding the implementation of Token Ring networks.

Local Area Networks, Token Ring Access Method

, IEEE Standard 802.5

(1989)

Commercial Building Telecommunication Cabling,

No. EIA/TIA-568

TECHNICAL SUPPORT

If you need additional support related to this device, or if you have any
questions, comments, or suggestions concerning this manual, contact the
Cabletron Systems Global Call Center:

Phone [phone]
Internet mail [e-mail]
FTP ctron.com (134.141.197.25)

Login
Password

BBS [phone]

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

anonymous
your email address

For additional information about Cabletron Systems or our products,
visit our World Wide Web site:
For technical support, select

http://www.cabletron.com/

Service and Support

.

Before calling the Cabletron Systems Global Call Center, have the
following information ready:

•

Your Cabletron Systems service contract number

•

A description of the failure

•

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

•

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

•

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

•

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

xi

PREFACE

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

•

recurring problem, etc.)
Any previous Return Material Authorization (RMA) numbers

•

xii

CHAPTER 1

INTRODUCTION

The MCC-16 Media Conversion Center is a 16-slot modular chassis that
holds up to 16 Conversion Modules (CMs). The MCC-16, shown in

Figure 1-1, can change twisted pair switch ports to different ports and/or

media types. It is designed for switches and can convert between Ring In
(RI), Ring Out (RO), lobe, and station ports, using twisted pair or
multimode fiber optic cabling.

The MCC-16 accommodates four different CMs. Each CM can support at
least two lobe ports which allow the connection of station ports,
commonly on switches. The MCC-16 is IEEE 802.5 and IBM compliant.
The conversion modules are discussed in Section 1.1 and Section 1.2.

MCC-FRIOMCC-FRIOMCC-FRIOMCC-FRIOMCC-D2PM MCC-CRIO MCC-CRIO MCC-CRIO MCC-CRIOMCC-D2PM MCC-D2PM MCC-D2PM

Figure 1-1 The MCC-16 Media Conversion Center

MCC-DFLMCC-DFLMCC-DFLMCC-DFL

MCC-16

1-1

INTRODUCTION

1.1 MCC-16 FUNCTIONAL OVERVIEW

The MCC-16 Media Conversion Center holds up to 16 CMs. The CMs
(listed in Table 1-1) can be used in any combination to accommodate
various types of Token Ring connections.

Table 1-1 Port And Media Type Of Conversion Modules

Type of Ports on the CM

See

Conversion
Module (CM)

Twisted Pair
(RJ45 Ports)

Multimode Fiber
(ST Ports)

Chapter
Below
For More
Information

MCC-FRIO
(Fiber
Ring In/Out)

MCC-DFL
(Dual Fiber
Link)

MCC-CRIO
(Copper
Ring In/Out)

MCC-D2PM
(Dual 2-Port
MAU)

Two lobe ports

Two configurable
ports (station,
lobe, RI, or RO)

Two lobe ports
One set RI/RO
ports

Four lobe ports Not applicable Chapter 7

One set RI/RO
ports

Two configurable
ports (station,
lobe, RI, or RO)

Not applicable Chapter 6

Chapter 4

Chapter 5

The MCC-16 features:

•

Compatibility with all Token Ring IEEE 802.5 compliant devices.

•

Ability to operate at 16 Mbps or 4 Mbps ring speeds.

•

Auto-sensing RJ45 ports that accept both Shielded Twisted Pair (STP)
and Unshielded Twisted Pair (UTP) cabling.

•

Active Re-timing with Jitter Reduction Circuitry that effectively
reduces jitter.

1-2

INTRODUCTION

Speed-fault protection that prev ents stations from causing a beaconing

•

condition when entering the ring at the wrong speed.
Dual load-sharing, fully redundant power supplies.

•

CMs and power supplies that can be installed or removed without

•

interrupting the operation of the other CMs and power supply in
the MCC-16.

Support for any combination of interchangeable CMs to provide

•

flexibility in choosing media types accommodating a wide variety of
topologies.

Integrated rack-mount brackets that allow the MCC-16 to install into

•

any 19-inch rack.
Autowrap feature on RI/RO ports that disables the appropriate port if

•

the cable is disconnected or fails – preserving ring integrity.
LANVIEW LED system that reports the status of the physical layer.

•

1.1.1 Speed-Fault Protection

The CMs prevent an y de vice from entering the ring at the wrong speed by
wrapping (closing) the port to which the device is trying to insert. This
prevents the device from beaconing the ring.

1.1.2 Active Re-timing With Jitter Reduction Circuitry

Active Re-timing with Jitter Reduction Circuitry uses a dual-digital,
Phase Lock Loop (PLL) that utilizes First-In, First-Out (FIFO) processing
to track and accurately receive even poor quality signals. This circuitry
effectively reduces jitter on a ring and removes jitter budget restraints.
This permits the use of longer cable lengths and mixed media types
without penalty and supports 250 stations per ring.

1-3

INTRODUCTION

1.2 CONVERSION MODULES

Each CM has at least two RJ45 receptacles that can be used for attaching
the cable from a Token Ring station, such as a switch. CMs that have
RI/RO capability allow the connection of RI ports to RO ports
(and vice versa) on other devices to extend the ring. The RI/RO ports are
compatible with all 802.5 compliant devices including passive MAUs.

By using different CMs in the MCC-16, the installation can contain RI,
RO, lobe, and station ports of either multimode fiber or twisted pair cable
to meet the needs of almost any topology.

The MCC-16 backplane supplies the power for the CMs. Each

NOTE

CM provides media conversion and/or port-type switching per
module.

1.2.1 MCC-FRIO

The MCC-FRIO, with RI/RO capabilities, has a set of fiber
ST RI/RO ports that can connect to RI/RO ports on other devices
(e.g., TDRMIM-AT, TRFOT-2, or TRRMIM-4AT) to extend the ring. The
module also has two lobe ports to connect stations. Thus, stations
connected to either lobe port can communicate across the RI/RO
connections to other parts of the ring, and they will also communicate
with each other.

1.2.2 MCC-DFL

The MCC-DFL has two Fiber Optic T ranscei vers (FO Ts). Each FO T has a
twisted pair and fiber ST port. This allows signals transmitted over the
twisted pair to be converted into optical signals for transmission over
multimode fiber. You can configure each FOT as a RI/RO device or a
station/lobe device. A switch can be set so that connections can be made
to an 802.5J compliant device.

Cabletron Systems offers complete compatibility with vendor

NOTE

1-4

products that comply with the “new” 802.5J standard for fiber
RI/RO ports. Therefore, the MCC-16 offers connectivity to
products using 802.5J or Cabletron Systems fiber keying.

INTRODUCTION

1.2.3 MCC-CRIO

The MCC-CRIO has a set of twisted pair RI/RO ports that can connect to
other devices with RI/RO capability (e.g., TDRMIM-AT). It also has two
lobe ports. This allows for RI/RO connections and the connection of
two stations. It provides the same functionality as the MCC-FRIO
(see Section 1.2.1) except it has twisted pair RI/RO ports.

1.2.4 MCC-D2PM

The MCC-D2PM can serve as a pair of two-port Multi-Station Access
Units (MAUs) or a single four-port twisted pair MAU.

1-5

INTRODUCTION

1-6

CHAPTER 2

INSTALLATION

This chapter describes how to install:

• The MCC-16 in a 19-inch rack

• An MCC-PS power supply into the MCC-16

• A Conversion Module (CM) into the MCC-16

• Cable into a CM port

The chapter also details maximum cable lengths, station count limits, and
troubleshooting.

Only qualified personnel should perform installation
procedures.

2.1 INSTALLATION CONSIDERATIONS

Check that all cabling guidelines detailed in Appendix B have been met
before installing and operating the MCC-16. The following guidelines are
also helpful:

Ensure that any enclosure site allows adequate cooling by

!

CAUTION

• The MCC-16 can be rack-mounted or placed on any horizontal

surface.

• Use a single phase 100 to 125 Vac (or 200 to 240 Vac) grounded po wer

source located within 6 feet (so the power cord can be connected) of
the installation site.

providing three inches of clearance on the sides, above, and
behind the MCC-16.

Also, ensure that the ambient temperature in the installation
location neither falls below 5°C nor e xceeds 40°C and changes
at a rate of no more than 10°C per hour.

• Ensure that any shelf on which an MCC-16 (fully-loaded) is placed

will support 40 pounds of static weight.

2-1

INSTALLATION

• A CM can be installed into any slot in the MCC-16.

• One MCC-PS supports any configuration; however, two are required

to support redundancy.

• Set jumpers and switches before installing a CM. You can use a

narrow, blunt-tipped instrument such as a screwdriver to flip switches.
The CM automatically restarts after you reinsert it in the MCC-16,
implementing the modified operational settings.

• To prevent damaging the component board, work with switches in a

well-lighted location and handle the instrument used to flip switches
cautiously. Avoid using a pencil to flip switches to prevent possible
problems associated with the accumulation of conductive graphite
dust on the switches. Avoid contact with other board components.

• Notify Cabletron Systems Global Call Center if you detect any

damage or missing parts during unpacking (see Preface).

2.2 UNPACKING AND HANDLING THE MCC-16

Electrostatic Discharge (ESD) can damage the MCC-16. Wear

!

CAUTION

the grounding wriststrap and plug its pin (under the removable
gator clip) into the grounding jack, as shown in Figure 2-1, to
prevent ESD damage when handling the MCC-16. Avoid
touching the components on the inside of the MCC-16.

MCC-16

ESD

WRIST STRAP

GROUNDING

RECEPTACLE

Figure 2-1 Using The Grounding Wriststrap

2-2

INSTALLATION

To unpack the MCC-16:

1. Remove the MCC-16 and other items from the shipping box.

You should have the following items:

• MCC-16 Media Conversion Center

• Grounding wriststrap

• MCC-16 User’s Guide

Save the box and packaging materials for possible future repackaging
and shipment.

2. Inspect the shipment for any signs of damage.

2.3 MOUNTING THE MCC-16 IN A 19-INCH RACK

Follow the guidelines in Section 2.1 to avoid possible problems during
installation. Perform these steps to install the MCC-16 in a 19-inch rack:

Mount the MCC-16 into the rack before installing the

TIP

MCC-PS(s), power cords, CMs, and cabling. You can more
easily handle an empty chassis.

1. Position the brackets of the MCC-16 between the vertical frame

columns of the rack, as shown in Figure 2-2.

2. Fasten the chassis securely to the frame columns with the screws.

MCC-16

ESD

WRIST STRAP

GROUNDING

RECEPTACLE

Figure 2-2 Fastening The MCC-16 T o The Rack

8-slot protection panels

2-3

INSTALLATION

2.4 UNPACKING AND INSTALLING THE MCC-PS

A single MCC-PS can power any possible configuration; however, two
are required to provide redundancy. (Refer to Section A.3 for exact
MCC-PS specifications.)

To unpack an MCC-PS:

1. Remove the MCC-PS from the protective bag and place it on top of the

bag in a dry, static-free, dust-free area.

2. Remove the power cord included with the MCC-PS.

Save the box and packaging materials for possible future repackaging
and shipment.

3. Inspect the shipment for any signs of damage.

Install an MCC-PS into the MCC-16 as follows:

1. Fully insert the power supply into the MCC-16, as shown in

Figure 2-3, and turn the fastening knob.

POWER 2

Figure 2-3 Inserting The Power Supply Into The MCC-16

2. To install the second MCC-PS unfasten the screw located along the

POWER 1

MCC-PS

POWER IN
POWER OUT
OVERLOAD

100-125V - 4.0A

FAN

200-250V - 2.0A

SN

50/60Hz

back side of the MCC-16 and remove the back cover, as shown in

Figure 2-4.

3. Fully insert the second MCC-PS and secure it with the fastening knob.

2-4

INSTALLATION

POWER 2

POWER 1

MCC-PS

POWER IN
POWER OUT
OVERLOAD

100-125V - 4.0A

FAN

200-250V - 2.0A

SN

50/60Hz

Figure 2-4 Removing The Back Cover Of The MCC-16

2.4.1 Power Supply LEDs

This section describes the MCC-PS LEDs, as listed in Table 2-1.

Table 2-1 MCC-PS LEDs

LED Status Meaning

GREEN

Input voltage delivered to the MCC-PS within
the acceptable limit (above 80 volts typically).

POWER IN

POWER OUT

OVERLOAD

FAN

RED

Input voltage delivered to the MCC-PS below
acceptable limit.

OFF Neither power supply is receiving power.

GREEN

RED

Output voltage delivered to the backplane
within regulation.

Output voltage not delivered to the backplane

within regulation.
OFF Neither power supply is receiving power.
GREEN Output current below rated load.

RED

Output current above rated load or only one

MCC-PS is delivering power to the chassis.
OFF Neither power supply is receiving power.
GREEN Normal operation.
RED Fan failure.

OFF Neither power supply is receiving power.

2-5

INSTALLATION

2.4.2 Turning The MCC-16 On And Off

You turn on the MCC-16 by connecting it to a power source, and you turn
it off by disconnecting it from the power source. Use the power cord
included with the MCC-PS. Connect the cord to or disconnect it from an
AC power source, as shown in Figure 2-5.

To connect to a power source and turn on the MCC-16:

1. Attach the power cord’s female connector to the male power source

connector on the MCC-PS.

2. Plug the power cord’s male connector into a grounded power outlet.

To turn off the MCC-16:

Disconnect the power cord from the power outlet.

POWER 2

Figure 2-5 Connecting The MCC-16 To A Power Source

2.5 UNPACKING A CM

Electrostatic Discharge (ESD) can damage a CM. To prevent

!

CAUTION

ESD damage when handling a CM:

• Wear the grounding wriststrap.

• Hold only the edges of the CM or the metal front panel.

• Avoid touching the CM components.

POWER 1

MCC-PS

POWER IN
POWER OUT
OVERLOAD

SN

FAN

100-125V - 4.0A
200-250V - 2.0A

50/60Hz

2-6

INSTALLATION

To unpack a CM:

1. Carefully remove the CM and other items from the shipping box.

You should have the following items:

• CM

• Quick Reference Card for the CM

Save the box and packaging materials for possible future repackaging
and shipment.

2. Remove the CM from the protective bag and place it on top of the bag

in a dry, static-free, dust-free area.

3. Inspect the shipment for any signs of damage.

2.6 INSTALLING A CM

Only qualified personnel should perform these procedures in
an activated MCC-16. It is recommended that all other
personnel shut down the MCC-16 before installing or
de-installing CMs to eliminate potential damage to the MCC-16
or the potential hazard of electrical shock.

Install a CM into the MCC-16 as follows:

1. Remove the protection panel from any CM slot in the MCC-16, as

shown in Figure 2-6.
(Note that on the first installation of a CM it will be necessary to

remove one of the 8-slot protection panels.)

Ensure that protection panels are fastened to the MCC-16 on

!

CAUTION

slots not occupied by CMs. This reduces safety hazards and
helps prevent problems associated with electro-magnetic
Interference (EMI).

2-7

INSTALLATION

MCC-16

Figure 2-6 Removing A Protection Panel

2. Fully insert the CM into the MCC-16 by sliding the CM into the top

and bottom board slots in the MCC-16, as shown in Figure 2-7.
The PWR LED lights indicating the reception of power.

MCC-16

MCC-DFL

Figure 2-7 Inserting A CM Into The MCC-16

Never use more than the minimal amount of physical force

!

CAUTION

necessary to insert a CM into the MCC-16. If you feel any
resistance while inserting, STOP! Remove the CM and inspect
the slot and the CM for obstructions or structural irregularities.
If you detect damaged components, call Cabletron Systems
Global Call Center for assistance.

3. Tighten the screw at the top of the CM with a flat-head screwdriver.

2-8

INSTALLATION

2.6.1 Boot-Up Sequence Of LEDs

During the boot-up process each LED will flash RED to GREEN or
YELLOW to OFF. Upon completion the LEDs will indicate the CM’s
configuration.

2.7 RESETTING A CM

Reset a CM by removing and re-inserting the CM.

2.8 ATTACHING CABLING

This section describes the maximum cable lengths and how to attach
cabling to CMs. The type of port (lobe, station, RI, or RO) does not
change the procedures. Table 2-2 lists the recommended maximum cable
lengths allowed for 4 Mbps and 16 Mbps ring operating speeds.

Table 2-2 Maximum Cable Lengths

Media Cable Type 4 Mbps 16 Mbps

Lobe

STP (IBM Type 1 & 2)

RI or RO

STP (IBM Type 6 & 9)
For station to wall jack
or patch panels only

UTP (Categories 3 & 4)

UTP (Category 5)

Lobe

RI or RO Not applicable Not applicable

Lobe

RI or RO

Lobe

RI or RO

)

300 meters
(984 feet)

770 meters
(2525 feet)

30 meters
(99 feet)

200 meters
(656 feet)

200 meters
(656 feet)

250 meters
(820 feet)

250 meters
(820 feet)

150 meters
(493 feet)

346 meters
(1138 feet)

30 meters
(99 feet)

100 meters
(328 feet)

100 meters
(328 feet)

120 meters
(394 feet)

120 meters
(394 feet)

MM Fiber

Lobe

RI or RO

2000 meters
(6562 feet)

2000 meters
(6562 feet)

2000 meters
(6562 feet)

2000 meters
(6562 feet)

2-9

INSTALLATION

2.8.1 Connecting Twisted Pair Cabling

To attach a cable to an RJ45 port, insert the RJ45 connector on the cable
into an RJ45 port on the CM, as shown in Figure 2-8.

MCC-CRIO

PWR

P
1

Figure 2-8 Attaching Cable To An RJ45 Port

P1
RI16 Mb

2.8.2 Connecting Fiber Optic Cabling

When connecting a fiber optic cable to a CM consider the following:

• Fiber optic link segments with Stab and Twist (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 on the
connector 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 strand (Tx) at one end connects to the Receive
(Rx) port at the other end, and vice versa.

• It is recommended that you label fiber optic cable to indicate which

end of a fiber strand connects to a Receive port and which end connects
to a T ransmit port. By using such a labeling scheme, you can eliminate
the possibility of connecting devices incorrectly.

Dust, dirt, and other contaminants on the ends of the fiber optic

!

CAUTION

2-10

strands may create data-transmissions problems. If the ends
become dirty, clean them with isopropyl alcohol using a soft,
clean, lint-free cloth.

INSTALLATION

To connect a fiber optic link segment to the CM:

1. Remove the protective plastic covers from the fiber ST ports on the

CM and from the ends of the fiber strand connectors.

2. Attach a fiber strand to the CM’s Receive port (labeled Rx) and attach

the other fiber strand to the CM’s Transmit port (labeled Tx), as shown
in Figure 2-9.

MCC-FRIO

PWR

16 Mb

P
1

RI

P1
RI

TX

Tx Port

RX

Rx Port

Figure 2-9 Connecting A Fiber Optic Link To The CM

3. Attach the other end of the fiber strand connected to the CM’s Rx port

to the other device’s Tx port. Attach the other end of the strand
connected to the CM’s Tx port to the other device’s Rx port.

2.9 DETERMINING THE STATION COUNT

The number of stations supported on a ring depends on the equipment that
constitutes the ring. If the ring contains only devices that implement
Active Re-timing with Jitter Reduction Circuitry (see Section 1.1), for
example, Cabletron Systems MCC-D2PM and TDRMIM-AT, then the
ring will support 250 stations for all media types. Rings containing any
device(s) that do not implement this circuitry may have lower station
count limits depending on the media type and speed of the ring. The
device that supports the lowest station count will limit the ring to exactly
the same number of stations. Consult the documentation for your
equipment for exact information.

2-11

INSTALLATION

2.10 TROUBLESHOOTING THE NETWORK

By following proper troubleshooting procedures you can diagnose and
correct problems with the MCC-16 and those typically encountered with
network installations.

2.10.1 Checking The MCC-16

This section describes how to inspect the MCC-16 to verify proper
operation or isolate problems.

• Use the LEDs to determine if the MCC-16 is operating normally.

See Section 2.4.1 for a description of the MCC-PS LEDs and the
appropriate chapter for each CM, for a complete description of their
LEDs.

- Use the LEDs to ensure that you configured the CM(s) as

intended. For example, does the 16 Mb LED indicate the CM is
set to the same speed as the ring with which it will interface?

- Check the PWR LEDs to verify the reception of power by the

CM(s). Resetting CMs with an unlit PWR LED may resolve the
problem.

• Check that CMs are securely installed in and fastened to the MCC-16.

If necessary, correctly re-insert each CM.

• Be sure that the Token Ring stations and the MCC-16 are adequately

powered in accordance with their respective power-requirement
specifications and are powered on.

2.10.2 Checking Lobe And Station Ports

This section describes how to check lobe and station ports. If problems
are encountered with a station, check the LED(s) associated with the port
to which the station is attached. Consult Table 2-3 for actions that may
solve problems indicated by the LED(s).

2-12

Table 2-3 LED Activity And Corrective Actions

LED Activity Meaning and Corrective Action

Link established, (normal operation) associated

GREEN

Blinking GREEN
(Fiber ST Only)

OFF

station inserted into the ring. If the station cannot
access network resources (such as servers) see

Section 2.10.3.

The connection from the upstream device to the
Receive connection is complete but the port is
wrapped. Check the other end of the cable.
Ensure the port on the downstream device is
attached correctly and enabled.

No phantom current present (no Rx activity in the
case of fiber ST ports). Try resetting the station.
Use a different cable, or try a different port. If
possible use a different CM to isolate the
problem.

INSTALLATION

Blinking RED
(Lobe Only)

Speed-fault condition caused the port to wrap,
adjust the speed of the station or the CM.

2.10.3 Individual Station Problems

If an inserted station with a GREEN status LED cannot access network
services, then the problems may involve the server. If a particular user
cannot log-on to a server perform the following:

• Use another station to attempt to log-on from the same port.

A successful attempt indicates the problem is likely with the original
station; conv ersely, if no other station can log-on, then the problem is
likely to be at the server.

• For TCP/IP devices only: If no stations can log-on to the server use a

PING utility to determine if IP traffic is reaching the server. If the
server responds to PING requests, then the problem is almost
definitely with the server or on the application layer. Consult your
server documentation for troubleshooting tips.

2-13

INSTALLATION

2.10.4 Checking RI/RO Ports

This section describes how to check RI/RO ports. If problems are
encountered with a trunk segment, check the LED(s) associated with the
port to which the segment is attached. Consult Table 2-4 for actions that
may solve problems indicated by the LED(s).

Table 2-4 Activity For RI/RO LEDs And Corrective Action

LED Activity Meaning and Corrective Action

GREEN

Blinking GREEN
(RJ45 Port)

Blinking GREEN
(Fiber ST Only)

OFF

Blinking RED

Active (port open). If you encounter
problems refer to Section 2.10.5.

Autowrap enabled (port wrapped). Ensure
the other end of the cable is inserted
properly.

The connection from the upstream device
to the Receive connection is complete but
the port is wrapped. Check the other end of
the cable. Ensure the port on the
downstream device is attached correctly
and enabled.

No connection. Try a different cable.
Resetting the CM may resolve the prob lem.
Also, verify that the ring speed and
configuration of both the CM and the
attached device are compatible.

Speed-fault condition caused the port to
wrap. Adjust the speed of the CM or the
device to which it is connected.

In the case of fiber ST ports only: A small jumper cable

TIP

2-14

can be used to join the Rx connection to the Tx connection on
the same fiber ST port to determine if the port is operational. An
operational cable connected in this manner will turn the port
status LED GREEN.

INSTALLATION

2.10.5 Checking The Entire Network

This section describes areas to check if the problem is not immediately
apparent.

• Trace the ring path through the network to ensure that there are no

physical layer problems. While tracing the ring:

- Check the cable connections at concentrators, CMs, patch panels

and wall plates, and Token Ring stations.

Are all connectors inserted fully into or secured to ports?

- Check the installation of the Token Ring network interface cards

in Token Ring stations.

- Are the network cards correctly configured and installed?

- Check the cable conductors for continuity.

Use cable testers designed for this task.

• Ensure that the maximum cable lengths specified for the media types

(see Table 2-2) used in the installation and also the maximum number
of stations supported (see Section 2.9) are not exceeded.

When these checks have been successfully completed for each connection
and any other necessary corrections have been made, the network should
perform normally. If, however, network problems persist, contact
Cabletron Systems Global Call Center, as described in the Preface, for
further assistance.

2-15

INSTALLATION

2-16

CHAPTER 3

MCC-FRIO SETUP

This chapter describes how to set jumpers and switches to configure the
MCC-FRIO, shown in Figure 3-1. It also describes LEDs.

MCC-FRIO

PWR

16 Mb

P
1

RI

RO

P1
RI

TX

RX

RO
P2

TX

Figure 3-1 MCC-FRIO Conversion Module

RX

P
2

3-1

MCC-FRIO SETUP

3.1 OVERVIEW OF THE MCC-FRIO

Use the MCC-FRIO’s fiber RI/RO ports to connect to concentrators that
have RI/RO ports. The two RJ45 lobe ports allow you to attach stations to
the ring. Thus, stations connected to either lobe port can communicate
across the RI/RO connection to other parts of the ring, and they will also
communicate with each other. Figure 3-2 shows the implementation of
the MCC-FRIO to connect an MMAC with the RI/RO ports and attach
two stations using the lobe ports. All of these devices occupy the same
ring.

Do not use RI/RO ports to connect rings that are intended to be

NOTE

physically separate segments. Using RI/RO ports to join
separate rings will create one ring. This configuration functions
but may cause the new ring to exceed the maximum station
count, depending on the size of the originally separate rings.

Switch

Server

MCC-FRIO

P1

PWR

RI

16 Mb

P
1

TX

RI

RX

RO
P2

TX

RO

RX

P
2

RO

RI

Figure 3-2 Sample MCC-FRIO Configuration

MMAC

3.1.1 Token Flow

The token enters the RI Port. Then the token passes to the station attached
to the P1 Port, before transmission to the station connected to the P2 Port.
Finally, the token leaves the CM through the RO Port.

3-2

MCC-FRIO SETUP

NOT

APPLICABLE

3.2 SETTING SWITCHES AND JUMPERS

Refer to Figure 3-3 and the following subsections when configuring
the MCC-FRIO.

SW1

OFF

OFF

SW2

ON

ON

SW1

OFF

ON

P1

OFF

SW2

P1

ON

Switch Configuration Table

(From back of card)

SW1 (FOT-A or RI)
SW2 (FOT-B or RO)

On – Cabletron fiber key

1

Off – 802.5J fiber key
On – RO or lobe (RJ45 port)

2

Off – RI or station (RJ45 port)
On – Autowrap enable (RJ45 port)

3

Off – Autowrap disable (RJ45 port)
On – Station and lobe application

4

Off – RI and RO application

Note: Switch 1 on SW1 controls the RI port.
Switch 2 on SW2 controls the RO port.

Figure 3-3 Location of SW1/SW2 Switchblocks And Jumper P1

(Default Settings)

3-3

MCC-FRIO SETUP

3.2.1 Selecting The Ring Speed

Use jumper P1 to select the MCC-FRIO ring speed, as shown in

Table 3-1.

Table 3-1 Ring Speed Setting With Jumper P1

Ring Speed Setting Put Jumper P1 Sleeve Over

16 Mbps Pins 1 and 2 (Default setting)
4 Mbps Pins 2 and 3

3.2.2 Selecting The Fiber Keying Type

The type of fiber key used depends on the de vice with which the port will
connect. Set the fiber keying types as follows:

Cabletron Systems offers complete compatibility with vendor

NOTE

products that comply with the “new” 802.5J standard for fiber
RI/RO ports. Therefore, the MCC-FRIO offers connectivity to
products using 802.5J or Cabletron Systems fiber keying.

Use Switch 1 in the SW1 switchblock to select the fiber keying type for
the RI port.

• Set Switch 1 On to connect to a RO port that is using Cabletron fiber

keying.

• Set Switch 1 Off to connect to a RO port that is using 802.5J fiber

keying.

Use Switch 1 in the SW2 switchblock to select the fiber keying type for
the RO port.

• Set Switch 1 On to connect to a RI port that is using Cabletron fiber

keying.

• Set Switch 1 Off to connect to a RI port that is using 802.5J fiber

keying.

3-4

MCC-FRIO SETUP

3.3 LED FUNCTIONS

This section describes the LEDs on the MCC-FRIO. Consult Figure 3-4,

Table 3-2 and Table 3-3 to help interpret LED indications.

MCC-FRIO

P1
RI16 Mb

16 Mb

P1

PWR

RI

P
1

TX

RI

RX

RO
P2

TX

RO

RX

P
2

PWR

RO
P2

Figure 3-4 MCC-FRIO LEDs

3.3.1 PWR - Power

The PWR LED remains lighted GREEN during normal operation,
indicating the reception of power. If the LED is off, the CM is not
receiving power.

3.3.2 16 Mb - Ring Speed

The 16 Mb LED lights YELLOW to indicate a 16 Mbps ring speed.
An unlit LED indicates a 4 Mbps ring speed.

3-5

MCC-FRIO SETUP

3.3.3 P1 And P2 - Ports

The P1 and P2 LEDs indicate the status of the associated lobe port, as
listed in Table 3-2.

Table 3-2 Activity Of P1 And P2 LEDs

LED Activity Meaning

GREEN Phantom current present (port inserted).
OFF No phantom current present.

Blinking RED

Speed-fault condition caused the port to
wrap.

3.3.4 RI And RO - Ports

The RI and RO LEDs indicate the status of the RI or RO port, as listed in

Table 3-3.

Table 3-3 Activity Of RI And RO LEDs

LED Activity Meaning

GREEN

Blinking GREEN

Blinking RED

Rx and Tx connected fiber key received
(port open and operational).

The connection from the upstream device
to the Receive connection is complete but
the port is wrapped.

Speed-fault condition caused the port to
wrap.

OFF Rx disconnected (signal loss).

3-6

CHAPTER 4

MCC-DFL SETUP

This chapter describes how to set switches and jumpers to configure the
MCC-DFL, shown in Figure 4-1. It also describes the LEDs.

MCC-DFL

F

O

T
A

F

O

T
B

PWR

16 Mb

P
1

P
2

PWR

16 Mb

P
1

P1
P2

TX

RX

P1
P2

TX

RX

Figure 4-1 MCC-DFL Conversion Module

P
2

4-1

MCC-DFL SETUP

4.1 OVERVIEW OF THE MCC-DFL

The MCC-DFL has two independent Fiber Optic Transceivers (FOTs).
Each FOT has an RJ45 and fiber ST port; thus allowing signals
transmitted over the twisted pair to be converted to optical signals for
transmission over multimode fiber and vice versa. The top RJ45 and
fiber ST port (FOT-A) and the bottom RJ45 and fiber ST port (FOT-B) are
on separate rings and do not communicate with each other within the
MCC-16. Communication between FOT-A and FOT-B requires an
external device such as a bridge or router. You can configure any port as
RI, RO, lobe, or station. Figure 4-2 shows an MCC-DFL with FOT-A
configured for station/lobe applications and FOT-B configured for RI/RO
applications.

Station/Lobe Application

Switch

MMAC

MCC-DFL

P1

PWR

P2

16 Mb

O
A

O
B

F
T

F
T

P
1

PWR

16 Mb

P
2

TX

P
2

P
1

Lobe

RX

P1
P2

TX

RX

Station

RI

Ring In/Ring Out Application

MMAC

MMAC

RO

Figure 4-2 Sample MCC-DFL Configuration

4-2

MCC-DFL SETUP

4.2 CONFIGURING THE MCC-DFL

Refer to Figure 4-3 through Figure 4-7 and Table 4-1 through Table 4-4
when configuring the MCC-DFL. The switches shown in Figure 4-3 are
in their On or Off positions as set at the factory (default settings). You
may change the switches for the applications described in Section 4.2.1
through Section 4.2.4.

The SW1 switchblock controls FOT-A. The SW2 switchblock

NOTES

controls FOT-B. Individual switches on each switchblock have
the same functionality.

Jumper P1 controls the ring speed of FOT-A. Jumper P2
controls the ring speed of FOT-B.

SW1

1234

SW1

1234

OFF

ON

OFF

1234

SW2

ON

P1

P2

1234

SW2

P1

P2

Switch Configuration Table

(From back of card)

SW1 (FOT-A or RI)

SW2 (FOT-B or RO)

On – Cabletron fiber key

1

Off – 802.5J fiber key
On – RO or lobe (RJ45 port)

2

Off – RI or station (RJ45 port)
On – Autowrap enable (RJ45 port)

3

Off – Autowrap disable (RJ45 port)

Figure 4-3 Location of SW1/SW2 Switchblocks And Jumpers P1/P2

On – Station and lobe application

4

Off – RI and RO application

(Default Settings)

4-3

MCC-DFL SETUP

The tables in the following sections show the applicable switch

NOTE

settings. A switch is not shown when it does not apply to the
application.

4.2.1 Configuring The RJ45 Port As A Lobe
And The Fiber ST Port As A Station

Refer to Figure 4-4 and Table 4-1 to connect a station to the ring if the
station is using STP or UTP cable. This setting configures the RJ45
connection as a lobe port and the fiber ST connection as a station port.
This is the default setting.

Station

Phantom Current

Phantom Current

MCC-DFL

PWR

16 Mb

P
1

F
O
T
A

P
2

PWR

16 Mb

P
1

F
O
T
B

P
2

P1
P2

TX

RX

P1
P2

TX

RX

Concentrator

Fiber Key

Fiber Key

Figure 4-4 Station Attachment To The Twisted Pair RJ45 Port

MMAC

Table 4-1 Settings To Configure The RJ45 Port For Lobe Use

1 Off
2 On - RO or lobe (RJ45 port)
3 Off
4 On - Station and lobe application

4-4

SW1 (FOT-A or RI)
SW2 (FOT-B or RO)

MCC-DFL SETUP

4.2.2 Configuring The RJ45 Port As A Station
And The Fiber ST Port As A Lobe

Refer to Figure 4-5 and Table 4-2 to connect a station to the ring if the
station is using multimode fiber optic cable. This setting configures the
RJ45 connection as a station port and the fiber ST connection as a lobe
port.

MCC-DFL

P1

PWR

P2

16 Mb

P

Phantom Current

MMAC

Concentrator

Phantom Current

1

F
O

TX

T
A

P
2

RX

P1

PWR

P2

16 Mb

TX

P
1

F
O

RX
T
B

P
2

Fiber Key

Station

Fiber Key

Figure 4-5 Station Attachment To The Fiber ST Port

Table 4-2 Settings To Configure The Fiber ST Port For Lobe Use

SW1 (FOT-A or RI)
SW2 (FOT-B or RO)

1 Off
2 Off - RI or station (RJ45 port)
3 Off
4 On - Station and lobe application

4-5

MCC-DFL SETUP

4.2.3 Configuring The RJ45 Port As RI
And The Fiber ST Port As RO

Do not use RI/RO ports to connect rings that are intended to be

NOTE

You can configure the RJ45 port as a RI and the fiber ST port as a RO
(see Figure 4-6) by setting the switches as shown in Table 4-3.

MMAC

physically separate segments. Using RI/RO ports to join
separate rings will create one ring. This configuration functions
but may cause the new ring to exceed the maximum station
count, depending on the size of the originally separate rings.

MCC-DFL

P1

Ring Out To Ring In

Ring Out To Ring In

PWR

P2

16 Mb

P
1

F

O

TX

T

A

P
2

PWR

16 Mb

P
1

F

O

T

B

P
2

Ring Out To Ring In

RX

P1
P2

TX

Ring Out To Ring In

RX

MMAC

Figure 4-6 RJ45 RI And Fiber ST RO

4-6

Table 4-3 Settings To Configure The RJ45 Port For RI Use

SW1 (FOT-A or RI)
SW2 (FOT-B or RO)

On - Cabletron fiber key

1

or
Off - 802.5J fiber key

2 Off - RI or station (RJ45 port)

On - Autowrap enable (RJ45 port)

3

or
Off - Autowrap disable (RJ45 port)

4 Off - RI and RO application

4.2.4 Configuring The RJ45 Port As RO

MCC-DFL SETUP

And The Fiber ST Port As RI

Configure the RJ45 port as a RO and the fiber ST port as a RI
(see Figure 4-7) by setting the switches as shown in Table 4-4.

MCC-DFL

P1

MMAC

Ring Out To Ring In

Ring Out To Ring In

PWR

P2

16 Mb

P
1

F
O
T
A

P
2

PWR

16 Mb

Ring Out To Ring In

TX

RX

P1
P2

MMAC

TX

P
1

F
O

RX
T
B

P
2

Ring Out To Ring In

Figure 4-7 RJ45 RO And Fiber ST RI

4-7

MCC-DFL SETUP

Table 4-4 Settings To Configure The RJ45 Port For RO Use

SW1 (FOT-A or RI)
SW2 (FOT-B or RO)

On - Cabletron fiber key

1

2 On - RO or lobe (RJ45 port)

3

4 Off - RI and RO application

or
Off - 802.5J fiber key

On - Autowrap enable (RJ45 port)
or
Off - Autowrap disable (RJ45 port)

4.3 SELECTING THE RING SPEEDS

Use jumper P1 to set the ring speed of FOT-A, as shown in Table 4-5.

Table 4-5 Setting Ring Speed OF FOT-A With Jumper P1

Ring Speed of FOT-A Put Jumper P1 Sleeve Over

16 Mbps Pins 1 and 2 (Default setting)
4 Mbps Pins 2 and 3

Use jumper P 2 to set the ring speed of FOT-B, as shown in Table 4-6.

Table 4-6 Setting Ring Speed Of FOT-B With Jumper P2

Ring Speed of FOT-B Put Jumper P2 Sleeve Over

16 Mbps Pins 1 and 2 (Default setting)
4 Mbps Pins 2 and 3

4-8

MCC-DFL SETUP

4.4 DESCRIPTION OF SWITCHES

This section describes each switch individually.

4.4.1 Switch 1

You can set the type of fiber keying on RI/RO ports to connect to devices
using 802.5J fiber keying or devices using Cabletron fiber keying.
Switch 1 dictates the type of fiber keying; the setting depends on whether
the attached device is using Cabletron fiber ke ying or 802.5J fiber ke ying.
Set the switch as listed in Table 4-7.

Cabletron Systems offers complete compatibility with vendor

NOTE

products that comply with the “new” 802.5J standard for fiber
RI/RO ports. Therefore, the MCC-DFL offers connectivity to
products using 802.5J or Cabletron Systems fiber keying.

Table 4-7 Settings For Switch 1 (SW1 And SW2 Switchblocks)

Keying Type for Fiber ST Port Set Switch 1 to Position

Connection to Cabletron compliant devices On
Connection to 802.5J compliant devices Off

4.4.2 Switch 2

This switch works in conjunction with Switch 4 to select the mode of
operation for the RJ45 port. Use Switch 4 to dictate whether the FOT will
act as a RI/RO device or station/lobe device. Once this has been done,
Switch 2 determines the application of the RJ45 port. The fiber ST
port automatically configures to work with the RJ45 port. For example,
configuring the RJ45 port as a RI, automatically changes the fiber ST port
to a RO. Set the switch as shown in Table 4-8.

Table 4-8 Settings For Switch 2 (SW1 And SW2 Switchblocks)

Mode of Operation for RJ45 Port Set Switch 2 to Position

RO or lobe applications On
RI or station applications Off

4-9

MCC-DFL SETUP

4.4.3 Switch 3

When the FOT is being used as a RI/RO device this switch enables or
disables the autowrap feature on the RJ45 port. The feature should be
enabled to connect to Cabletron devices or disabled to connect to 802.5
compliant devices. Set Switch 3 as shown in Table 4-9.

Table 4-9 Setting For Switch 3 (SW1 And SW2 Switchblocks)

Autowrap on RJ45 RI/RO Port Set Switch 3 to Position

Connection to Cabletron devices On
Connection to 802.5 compliant devices Off

4.4.4 Switch 4

This switch selects the mode on the entire FOT. Use the switch to
configure it as a RI/RO de vice or a station/lobe de vice. Then use Switch 2
to establish the configuration of the RJ45 port; the fiber ST port
configures automatically. Set Switch 4 as shown in Table 4-10.

Table 4-10 Settings For Switch 4 (SW1 And SW2 Switchblocks)

Configure FOT Mode for Set Switch 4 to Position

RI/RO applications Off
Station/Lobe applications On

)

4-10

MCC-DFL SETUP

4.5 LED FUNCTIONS

This section describes the LEDs on the MCC-DFL. Consult Figure 4-8,

Table 4-11, and Table 4-12 to help interpret LED indications.

MCC-DFL

P1

PWR

P2

16 Mb

P
1

F
O

TX

T
A

P
2

RX

P1

PWR

P2

16 Mb

TX

P
1

F
O

RX
T
B

P
2

PWR

PWR

16 Mb

P1
P216 Mb

P1
P2

Figure 4-8 MCC-DFL LEDs

4.5.1 PWR - Power

The PWR LED remains lighted GREEN during normal operation,
indicating the reception of power. If the LED is off, the CM is not
receiving power.

4.5.2 16 Mb - Ring Speed

Each FOT has a 16 Mb LED. The LEDs lights YELLOW to indicate a
16 Mbps ring speed on the associated FOT. An unlit LED indicates a ring
speed of 4 Mbps on the associated FOT.

4-11

MCC-DFL SETUP

4.5.3 P1 And P2 - Ports

Each FOT has P1 and P2 LEDs to indicate the status of the associated
port.

On FOT-A, the P1 LED indicates the status of the RJ45 Port, and the
P2 LED indicates the status of the fiber ST Port.

On FOT-B, the P1 LED indicates the status of the fiber ST Port, and the
P2 LED indicates the status of the RJ45 Port.

The P1 and P2 LEDs act differently on FOTs configured for

NOTE

P1 And P2 LEDs For Station And Lobe Ports

The P1 and P2 LED indications vary slightly for fiber ST and RJ45 ports.

Table 4-11 lists the LED indications for ports configured for lobe or

station use.

station/lobe applications than they do for FOTs configured for
RI/RO applications.

Table 4-11 LED Activity For Station And Lobe Ports

Port LED Activity Meaning

GREEN Phantom current present (port inserted).

RJ45
Lobe or
Station

Fiber
Lobe or
Station

OFF No phantom current present.
Blinking RED

(Lobe Only)
GREEN Fiber key received (port inserted).

Blinking GREEN

Blinking RED
(Lobe Only)

OFF Rx disconnected - signal loss.

Speed-fault condition caused the port to
wrap.

The connection from the upstream device
to the Receive connection is complete but
the port is wrapped.

Speed-fault condition caused the port to
wrap.

4-12

MCC-DFL SETUP

P1 And P2 LEDs For RI And RO Ports

The P1 and P2 LEDs indicate the status of the RI/RO ports, as described
in Table 4-12.

Table 4-12 P1 And P2 LEDs For RI/RO Ports

Port LED Activity Meaning

GREEN Active (port open).
Blinking GREEN Autowrap enabled (port wrapped).

RJ45
RI/RO

Blinking RED

OFF No connection.
GREEN Rx connected, fiber key received.

Speed-fault condition caused the port to
wrap.

Fiber
RI/RO

The connection from the upstream device to

Blinking GREEN

Blinking RED

OFF No connection.

the Receive connection is complete but the
port is wrapped.

Speed-fault condition caused the port to
wrap.

4-13

MCC-DFL SETUP

4-14

CHAPTER 5

MCC-CRIO SETUP

This chapter describes how to set jumpers and switches to configure the
MCC-CRIO, shown in Figure 5-1. The chapter also explains LEDs.

MCC-CRIO

PWR

P
1

R

I

R
O

P1
RI16 Mb

RO
P2

Figure 5-1 MCC-CRIO Conversion Module

P
2

5-1

MCC-CRIO SETUP

5.1 OVERVIEW OF THE MCC-CRIO

Use the RI/RO ports of the MCC-CRIO to connect to concentrators that
have RI/RO ports. The two lobe ports allow you to attach stations to the
ring. Thus, stations connected to either lobe port can communicate across
the RI/RO connection to other parts of the ring, and they will also
communicate with each other. Figure 5-2 shows the implementation
of the MCC-CRIO to connect to an MMAC with the RI/RO ports and
attach two stations using the lobe ports. All of these devices occupy the
same ring.

Do not use RI/RO ports to connect rings that are intended to be

NOTE

physically separate segments. Using RI/RO ports to join
separate rings will create one ring. This configuration functions
but may cause the new ring to exceed the maximum station
count, depending on the size of the originally separate rings.

Server

MCC-CRIO

P1

PWR

RI16 Mb

P
1

R

I

RO
P2

R
O

P
2

Switch

RO

RI

Figure 5-2 Sample MCC-CRIO Configuration

MMAC

5.1.1 Token Flow

The token enters the RI Port. Then the token passes to the station attached
to the P1 Port, before transmission to the station connected to the P2 Port.
Finally, the token leaves the CM through the RO Port.

5-2

MCC-CRIO SETUP

5.2 SETTING SWITCHES AND JUMPERS

Refer to Figure 5-3, Table 5-1, Table 5-2, and Table 5-2 when configuring
the MCC-CRIO.

P1

P1

SW1

1234

SW1

ON

OFF

1234

Switch Configuration Table

SW1 Settings

On – Enable RI port

1

Off – Disable RI port
On -Enable RO port

2

Off – Disable RO port
On – Enable autowrap on RI

(for connection to Cabletron devices)

3

Off – Disable autowrap on RI

(for use with other vendor devices)

On – Enable autowrap on RO

4

(for connection to Cabletron devices)

Off – Disable autowrap on RO

(for use with other vendor devices)

Figure 5-3 Location Of SW1 Switchblock And Jumper P1

(Default Settings)

5-3

MCC-CRIO SETUP

5.2.1 Selecting The Ring Speed

Use jumper P1 to select the MCC-CRIO ring speed, as listed in Table 5-1.

Table 5-1 Ring Speed Settings With Jumper P1

Ring Speed Setting Put Jumper P1 Sleeve Over

16 Mbps Pins 1 and 2 (Default setting)
4 Mbps Pins 2 and 3

5.2.2 Setting Port Configurations

The RI/RO ports have an autowrap capability (i.e., transmit phantom
current) to close the ring, when:

• A cable is cut

• A cable fails

• A cable is not attached to a port

In the SW1 switchblock, Switch 1 and Switch 3 control the RI port.
Switch 2 and Switch 4 control the RO port.

Connecting RI/RO Ports To The RI/RO Ports Of Cabletron Devices

Switch 1 overrides Switch 3 and Switch 2 overrides Switch 4.

NOTES

The autowrap capability is set at the factory. This default
configuration allows the connection of Cabletron RI/RO ports.
(See Table 5-2.)

Set Switch 1 On and Switch 3 On to connect the RI of the MCC-CRIO to
the RO of a Cabletron device.

Set Switch 2 On and Switch 4 On to connect the RO of the MCC-CRIO to
the RI of a Cabletron device.

5-4

MCC-CRIO SETUP

Table 5-2 Switch Settings For Connecting Cabletron RI/RO Devices

SW1 Settings

1 On - Enable RI port
2 On - Enable RO port
3 On - Enable autowrap on RI (for connection to Cabletron devices)
4 On - Enable autowrap on RO (for connection to Cabletron devices)

Connecting The RI/RO Ports To The RI/RO Ports Of Other Vendors

You must disable autowrap to connect the RI/RO ports to the devices of
other vendors.

Set Switch 1 On and Switch 3 Off to connect the RI of the MCC-CRIO
to the RO of a non-Cabletron device.

Set Switch 2 On and Switch 4 Off to connect the RO of the MCC-CRIO
to the RI of a non-Cabletron device. (See Table 5-2.)

Table 5-3 Switch Settings For Connecting The MCC-CRIO RI/RO Ports To

Other Vendor’ s Devices

SW1 Settings

1 On - Enable RI port
2 On - Enable RO port
3 Off - Disable autowrap on RI (for use with other vendor’s devices)
4 Off - Disable autowrap on RO (for use with other vendor’s devices)

If autowrap is disabled, connecting a cable to the RI/RO port

!

CAUTION

may cause a beaconing condition before the cable is
completely attached. To avoid this condition connect the cable
before you insert the CM into the MCC-16, or perform the
connection with the MCC-16 shut off.

5-5

MCC-CRIO SETUP

5.3 LED FUNCTIONS

This section describes the LEDs on the MCC-CRIO. Consult Figure 5-4,

Table 5-4, and Table 5-4 to interpret LED indications.

MCC-CRIO

P1

PWR

RI16 Mb

P
1

R

I

RO
P2

R
O

P
2

Figure 5-4 MCC-CRIO LEDs

5.3.1 PWR - Power

PWR

P1
RI16 Mb

RO
P2

The PWR LED remains lighted GREEN during normal operation,
indicating the reception of power. If the LED is off, the CM is not
receiving power.

5.3.2 16 Mb - Ring Speed

The 16 Mb LED lights YELLOW to indicate a 16 Mbps ring speed.
An unlit LED indicates a ring speed of 4 Mbps.

5-6

MCC-CRIO SETUP

5.3.3 P1 And P2 - Ports

The P1 and P2 LEDs indicate the status of the associated lobe port, as
listed in Table 5-4.

Table 5-4 Activity Of P1 And P2 LEDs

LED Activity Meaning

GREEN Phantom current present (port inserted).
OFF No phantom current present.

Blinking RED

Speed-fault condition caused the port to
wrap.

5.3.4 RI And RO - Ports

The RI and RO LEDs indicate the status of the RI or RO port, as listed in

Table 5-4.

Table 5-5 Activity Of RI And RO LEDs

LED Activity Meaning

GREEN Active (port open).
Blinking GREEN Autowrap enabled (port wrapped).
OFF No activity (port wrapped).

Blinking RED

Speed-fault condition caused the port to
wrap.

5-7

MCC-CRIO SETUP

5-8

CHAPTER 6

MCC-D2PM SETUP

This chapter describes how to set the jumpers to configure the
MCC-D2PM, shown in Figure 6-1. It also describes the LEDs.

MCC-D2PM

PWR

16 Mb

P
1

P
2

2 RINGS

16 Mb

P
3

P1
P2

P3
P4

Figure 6-1 MCC-D2PM Conversion Module

P
4

6-1

MCC-D2PM SETUP

6.1 OVERVIEW OF THE MCC-D2PM

The MCC-D2PM has four lobe ports which allow the attachment of
stations. The CM is split into two MAUs unless you configure it as one
MAU. Figure 6-2 shows two applications using the MCC-D2PM. One
shows all of the stations on the same ring and the other sho ws the stations
on two separate rings.

Single Ring

(4 port MAU)

Switch

Server

MCC-D2PM

PWR

P1
P2

16 Mb

P
1

P
2

2 RINGS

16 Mb

P
3

Server

P3
P4

Server

Dual Ring

Switch

For direct attachment
to station port only

Switch

P
4

Ring 1

MCC-D2PM

PWR

16 Mb

P
1

P
2

2 RINGS

16 Mb

P
3

P
4

Station

P1
P2

P3
P4

Station

Figure 6-2 Sample MCC-D2PM Configurations

6-2

Ring 2

MCC-D2PM SETUP

6.1.1 Token Flow

The token enters the P1 Port then passes to the device attached to the P4,
P3, then P2 Port. Finally, the token returns to the P1 Port.

Splitting the CM places the P1 Port and P2 Port on a different MAU than
the P3 Port and P4 Port. In this configuration, the token passes from the
P1 Port to the P2 Port on the top MA U and from the P4 Port to the P3 Port
on the bottom MAU.

6.2 SETTING JUMPERS TO CONFIGURE THE CM

Refer to Figure 6-3, and Table 6-1 through Table 6-4 when setting
jumpers. Note that the figure shows the jumpers in their On or Off
positions as set at the factory (default settings).

P1

P1

P3

P3

P2

P2

Figure 6-3 Location of Jumpers P1, P2, And P3

(Default Settings)

6.2.1 Joining The D2PM Into One Ring

Each MA U can occupy one ring. This allo ws stations connected to the top
pair of lobe ports (labeled P1 and P2) to communicate with stations
connected to the bottom pair of lobe ports (labeled P3 and P4). Enable or
disable this feature using jumper P3, as listed in Table 6-1.

6-3

MCC-D2PM SETUP

Table 6-1 Joining The CM Into One Ring With Jumper P3

Ring Configuration Put Jumper P3 Sleeve Over

CM split into two rings Pins 2 and 3 (Default setting)
All ports on the same ring Pins 1 and 2

If you split the MAU into two rings, you may need to set the speed of the
second ring, as described in Section 6.2.2.

6.2.2 Selecting The Ring Speed(s)

Use jumper P1 to select the ring speed of the MCC-D2PM, as shown in

Table 6-2.

If the CM is split into two rings, then jumper P1 controls the

NOTE

speed of the top two lobe ports (labeled P1 and P2).

Table 6-2 Ring Speed Settings With Jumper P1

Ring Speed Setting Put Jumper P1 Sleeve Over

16 Mbps Pins 1 and 2 (Default setting)
4 Mbps Pins 2 and 3

Use jumper P 2 to set the speed of the bottom ring (labeled P3 and P4)
when the CM has been configured as two MAUs on separate rings,
(see Table 6-2). If the MCC-D2PM is configured as a single ring MAU,
jumper P2 is not used.

6-4

Table 6-3 Ring Speed Settings With Jumper P2

Ring Speed Setting Put Jumper P2 Sleeve Over

16 Mbps Pins 1 and 2 (Default setting)
4 Mbps Pins 2 and 3

6.2.3 Summary Of Jumper Settings

Only reposition the jumpers listed in Table 6-4. All other

!

CAUTION

jumpers are set at the factory and should not be repositioned.
Note the position of these jumpers and switches for future
reference.

Table 6-4 Jumper Settings

MCC-D2PM SETUP

Jumper Setting

P1

P2

P3

Sleeve over Pins 1 and 2 – 16 Mbps
Sleeve over Pins 2 and 3 – 4 Mbps

Sleeve o ver Pins 1 and 2 – Bottom ring speed 16 Mbps
Sleeve over Pins 2 and 3 – Bottom ring speed 4 Mbps

Sleeve over Pins 2 and 3 – Ports divided into two rings
Sleeve over Pins 1 and 2 – All ports on the same ring

6.3 LED FUNCTIONS

This section describes the LEDs on the MCC-D2PM. Consult Figure 6-4
and Table 6-5 to help interpret LED indications.

6-5

MCC-D2PM SETUP

MCC-D2PM

PWR

16 Mb

P
1

P
2

2 RINGS

16 Mb

P
3

P
4

P1
P2

P3
P4

PWR

2 RINGS

Figure 6-4 MCC-D2PM LEDs

P1
P216 Mb

P3
P416 Mb

6.3.1 PWR- Power

The PWR LED remains lighted GREEN during normal operation,
indicating the reception of power. If the LED is off, the CM is not
receiving power.

6.3.2 2 Rings - CM Split

The 2 Rings LED lights YELLOW to indicate the CM is split into two
rings. An unlit LED means all four ports are on the same MAU.

6.3.3 16 Mb - Ring Speed(s)

Each 2-port MAU has a 16 Mb LED. The LEDs light YELLOW to
indicate a 16 Mbps ring speed on the associated MAU. An unlit LED
indicates a ring speed of 4 Mbps on the associated MAU.

If the MCC-D2PM has only one ring then the status of the top
16 Mb LED indicates the speed of the entire CM.

6.3.4 P1, P2, P3, And P4 - Ports

The P1, P2, P3, and P4 LEDs indicate the status of the associated lobe
port, as listed in Table 6-5.

6-6

MCC-D2PM SETUP

Table 6-5 Activity Of P1, P2, P3, And P4 LEDs

LED Activity Meaning

GREEN Phantom current present (port inserted).
OFF No phantom current present.

Blinking RED

Speed-fault condition caused the port to
wrap.

6-7

MCC-D2PM SETUP

6-8

APPENDIX A

SPECIFICATIONS

This appendix provides general specifications and physical dimensions of
the MCC-16 and its modules.°

A.1 ENVIRONMENTAL REQUIREMENTS

Operating Temperature: 5° to 40° C (41° to 104° F)
Storage Temperature: -30° to 73° C (-22° to 164° F)
Operating Humidity: 5% to 90% RH (non-condensing)

A.2 HARDWARE SPECIFICATIONS

MCC-16:
Dimensions: 5.25 in. H x 17.00 in. W x 19.38 in. D

(13.46 cm H x 43.60 cm W x 49.70 cm D)

Weight: 16 lbs

(7.26 kg)

CM(s):
Dimensions: 5.0 in. H x 1.0 in. W x 9.0 in. D

(12.8 cm H x 2.56 cm W x 23.1 cm D)

Weight: 1 lb

(0.45 kg)

MCC-PS:
Dimensions: 4.25 in. H x 8.50 in. W x 10.13 in. D

(10.90 cm H x 21.80 cm W x 25.97 cm D)

Weight: 4 lbs

(1.81 kg)

A-1

SPECIFICATIONS

A.3 MCC-PS POWER SUPPLY SPECIFICATIONS

The MCC-PS is a universal power supply which will accept

NOTE

The power supply has two outputs of +5 volts and +6.3 volts. Maximum
output power is 150 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 listed in T able A-1.

input power between 100 to 125 Vac (or 200 to 240 Vac),
50/60 Hz.

Table A-1 Power Supply Outputs

Output Min. Load Max. Load Max. Power

+ 5 Volts 0 Amps 30 Amps 150 Watts
+6.3 Volts 0 Amps 0.1 Amps 0.63 Watts

A.4 REGULATORY COMPLIANCE

The MCC-16 and CMs meet the following requirements:

EMC

FCC Part 15, EN55022, CSA C108.8, VCCI V-3/93.01, EN50082-1, and
89/336/EEC

Safety

UL1950, CSA C22.2 No. 950, EN60950, IEC 950, and 73/23/EEC

A-2

APPENDIX B

CABLING

This appendix describes basic Token Ring cabling terminology and
details guidelines for installing cable. Consult Appendix C for design and
performance specifications for the different types of media used in Token
Ring networks.

B.1 TRUNK CABLING

Trunk cabling serves as the medium for interconnection of network
concentrators and their lobe ports (see Figure B-1). Ring ports (i.e., RI
and RO) connect to one another via trunk cabling. T runk cabling pro vides
both the main and secondary ring paths. Shielded Twisted Pair (STP),
Unshielded Twisted Pair (UTP), and fiber optic media are used for trunk
cabling. Performance capability varies among the media types. Fiber
provides the greatest distance capability and signal-interference
immunity, and STP provides greater distance capability and
signal-interference immunity than UTP.

Concentrator/Hub

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

RI RO

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

Figure B-1. Trunk And Lobe Cabling Configuration

Lobe Cable

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

RI RO

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

Trunk Cable

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

RI RO

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

B-1

CABLING

B.2 LOBE CABLING

Lobe cabling provides for the connection between end station and lobe,
or Trunk Coupling Unit (TCU) ports. A station can transmit data to and
receive data from other stations on the ring via the lobe cable attachment
to the concentrator.

B.2.1 Lobe Port

A lobe port accepts phantom current or a fiber key to allow the insertion
of a station on the ring via the lobe segment attached to the concentrator.

B.2.2 Station Port

A station port transmits phantom current or a fiber key to enter the ring.

B.3 REQUIREMENTS AND RECOMMENDATIONS

To achieve optimal performance from your installation, observe the
following recommendations:

• Maintain a punch-down block/patch panel limit of two between lobe

ports and wall outlets.

• Use properly grounded metal troughs, ducts, etc. for carrying Token

Ring cabling.

• Avoid routing Token Ring cabling near twisted pair cables that exit a

building or are susceptible to lightning strikes and power surges.

• Do not use UTP cabling with high voltage (greater that 5 volts) signals

with sharp rise or fall times. The noise coupling from such signals
could directly cause errors on the Token Ring network.

• Ensure that the network meets the performance requirements listed in

Table B-1.

• Do not exceed the recommended cable lengths listed in Table 2-2.

B-2

CABLING

B.3.1 Network Performance Requirements

The overall cabling system used in a Token Ring network must meet the
performance requirements listed in Table B-1.

Table B-1 Token Ring Network Performance Requirements

Maximum
Total Signal
Attenuation

≤ 14.5 dB ≤ 20 dBmV ≥ 30.5 dB

Maximum
Total Ambient
Noise

.

Minimum
NEXT loss
per 100 m

B.3.2 Signal Interference

Some of the conditions that degrade Token Ring signals are:

• Crosstalk

• Noise

• Temperature

Crosstalk

Crosstalk is interference caused by signal coupling between different
cable pairs contained within a multi-pair cable bundle. Multi-pair cabling
jackets should not be used for routing Token Ring trunk cabling,
especially at 16 Mbps. Avoid mixing Token Ring cabling with other
cabling systems (e.g., telephone) within the same multi-pair bundle.

Noise

Noise can be caused by crosstalk or other energy sources. If
noise-induced errors are suspected, ensure that the electrical circuitry in
the area is properly wired and grounded and/or try re-routing cabling
away from potential noise sources (motors, switching equipment,
fluorescent lighting, high amperage equipment).

Temperature

The attenuation level of PVC-insulated cable varies significantly with
temperature. So check the cable manufacturer’s specifications.
Plenum-rated cables are strongly recommended in areas where
temperatures exceed 40°C (104°F). Under such conditions, plenum-rated
cables ensure that cable attenuation tolerance remains within
specifications.

B-3

CABLING

B.3.3 Determining The Maximum Signal-Drive Distance

One of the most important physical-design factors to consider when
installing a Token Ring network is the maximum signal-drive distance.
The drive distance threshold for any of the categories of cable types
(STP, UTP, fiber) used in an installation is the maximum distance a signal
can travel intact across the cable between active devices without loss of
data.

Signal loss is caused primarily by two conditions: attenuation (weakening
of signal strength) and jitter (received v ersus transmitted signal clocking).
Remember that any condition that degrades signal integrity seriously
compromises the reliability of the network.

Determining Factors

The maximum drive distance achievable from a multiple-station Token
Ring cabling installation is dependent on the following factors:

• Media types used for both lobe and trunk cabling in the installation and

the drive-distance thresholds specified for the types of cable used.

• Ring operating speed.

• Presence of active de vices (with repeater circuitry) and passive de vices

(without repeater circuitry) in the installation and the total number of
both in the installation.

• Number of patch panels used in the installation.

B.4 CABLE PINOUTS

This section presents the signal assignments for RJ45 station, lobe, RI,
and RO port pins.

B.4.1 Station Port Pins

Figure B-2 illustrates the signal assignments for RJ45 station port pins.

B-4

CABLING

Cable Shield

8
7

Tx+
Rx–
Rx+

Tx–

Figure B-2. RJ45 Station Port Pins – Signal Assignments

6
5
4
3
2

1

Cable Shield

B.4.2 Lobe Port Pins

Figure B-3 illustrates the signal assignments for RJ45 lobe port pins.

Cable Shield

8

7

Rx+

Tx–
Tx+
Rx–

Figure B-3. RJ45 Lobe Port Pins – Signal Assignments

6
5
4
3
2
1

Cable Shield

B-5

CABLING

B.4.3 RI Port Pins

Figure B-4 illustrates the signal assignments for RI port pins.

Cable Shield

8
7

Tx+
Rx–
Rx+

Tx–

6
5
4
3
2
1

Cable Shield

Figure B-4. RJ45 RI Port Pins – Signal Assignments

B.4.4 RO Port Pins

Figure B-5 illustrates the signal assignments for RO port pins.

Cable Shield

8
7

Rx+

Tx–
Tx+

Rx–

6

5

4

3
2

1

Figure B-5. RJ45 RO Port Pins – Signal Assignments

B-6

Cable Shield

CABLING

B.5 CONNECTING TO AN IBM PATCH PANEL

If you want to attach to a patch panel that has MIC connectors, shielded
patch cables that adapt a shielded RJ45 to a Data Connector are available
from Cabletron Systems. These adapter/patch cables permit connection to
an existing patch panel equipped with MICs (see Figure B-6).

TRXMIM-54A

6

Rx+

3

Rx–

4

Tx+

5

Tx–

TCU Port

RJ-45 jack

MIC Coupling

6

3

4

5

Tx+

Tx–

Rx+

Rx–

RJ-45 Plug

STP Lobe Cable

ShieldShield

Shield

Tx+

Tx–

Rx+

Rx–

O

B

R

G

MIC / MIC

STP Jumper Cable

Tx+

O

Tx–

B

Rx+

R

Rx–

G

Figure B-6. Adapter/Patch Cable

Token Ring Station

Tx+

Tx–

Rx+

Rx–

ShieldShield

Shield

Male DB-9 NIC Port

9

9

5

5

1

1

6

6

Tx+

Tx–

Rx+

Rx–

Female DB-9

B-7

CABLING

B-8

APPENDIX C

MEDIA SPECIFICATIONS

This appendix describes design and performance specifications for each
of the media types used with Token Ring.

C.1 TWISTED PAIR COPPER CABLE

Twisted pair copper cable is used for baseband data transmission. It
consists of multiple pairs of entwined solid copper wire strands that are
each encased in an insulating material within an outer protective sheath.
In contrast to unshielded twisted pair (UTP), shielded twisted pair (STP)
cable pairs are also encased in a metallic, conducting material designed to
block out intrusive outside electrical signals that can interfere with signal
traffic on the cable.

C.1.1 UTP

Lobe ports support UTP cable categories 3, 4, and 5, which are described
as follows:

• Category 3 UTP cable consists of four unshielded twisted pairs of 24

AWG solid wire for data or voice communication. It is typically used
to wire cable runs within the walls of buildings. Because it does not
meet the minimum Near-End Crosstalk (NEXT) tolerance for 16
Mbps Token Ring transmission, it is not recommended for installation.

• Category 4 and 5 are enhanced versions of twisted pair. Both are

composed of the same wire gauge as Category 3, but demonstrate
superior performance due to improvements in design (e.g., more twists
per foot). Because of their ability to filter crosstalk and noise at 16
Mbps, they are recommended for Token Ring installation.

Table C-1 lists performance specifications for UTP cable categories 3, 4,

and 5 at Token Ring operating frequencies of 4 and 16 MHz. The values
listed include the maximum attenuation of the cables, connectors, patch
panels, and reflection losses due to impedance mismatches in the
segment.

C-1

MEDIA SPECIFICATIONS

Table C-1 UTP Performance Specifications

EIA/TIA
Category

Cat. 3 100Ω ±15% 17 40 23
Cat. 4 100Ω ±15% 13 27 36
Cat. 5 100Ω ±15% 13 25 44

Electrical
Impedance

Attenuation
@ 4 MHz
dB/1000 ft.

Attenuation
@ 16Mhz
dB/1000 ft.

NEXT
dB/1000 ft.

C.1.2 STP

The MCC-16 supports IBM Type 1, 2, 6, and 9 STP cabling as described
below:

• IBM T ype 1 consists of two STP lengths of 22 AWG solid wire for

data. It is typically used for the longest cable runs within walls of
buildings.

• IBM T ype 2 is similar to Type 1 data cable, but it has four additional

UTP lengths of 22 A WG solid wire carried outside of the shield casing.
It is typically used for voice communication and often used to wire
cable runs within the walls of buildings.

• IBM T ype 6 consists of two STP lengths of 26 A WG stranded wire for

data. It is typically used in patch panels or to connect devices to/from
wall jacks.

• IBM T ype 9 is similar to Type 1, but it uses 26 AWG solid wire

instead.

IBM Types 6 and 9 are used primarily for lobe connections from stations
to wall jacks or patch panels.

Table C-2 lists STP cable performance specifications.

15%
15%

15%
15%

.

<22 dB/km (6.7 db/1000 ft.)
<45 dB/km (13.7 db/1000 ft.)

<33 dB/km (10 db/1000 ft.)
<66 dB/km (20 db/1000 ft.)

Table C-2 STP Cable Specifications

Types Frequency Impedance Attenuation

1 & 2

6 & 9

4 MHz
16 MHz

4 MHz
16 MHz

150Ω +

150Ω +
150Ω +

150Ω +

C-2

MEDIA SPECIFICATIONS

C.2 FIBER OPTIC CABLE SPECIFICATIONS

A fiber optic cable comprises a drawn fiber of pure glass (or plastic),
enveloped within another layer of glass called cladding. Around the fiber
(core and cladding) are wrapped multiple layers of reinforced matter that
protect the fiber. Multimode fiber cable, typically used for station
attachment, consists of several fibers. Single-mode fiber consists of a
single fiber.

C.2.1 Multimode

Table C-3 lists signal tolerance specifications for Multimode fiber optic

cable supported by Cabletron products.

Table C-3 Signal Tolerances For Multimode Fiber Optic Cable

Cable Type Attenuation Maximum Drive Distance

Multimode
Multimode
Multimode
Typical Signal Attenuation Rate: ≤ 1.5 dB/km

50/125 µm ≤ 13.0 dB 2 km (2187.7 yards)

62.5/125 µm ≤ 16.0 dB 2 km (2187.7 yards)
100/140 µm ≤ 19.0 dB 2 km (2187.7 yards)

C.2.2 Single-Mode

Table C-4 lists signal tolerance specifications for Single-Mode fiber optic

cable supported by Cabletron products.

Table C-4 Single Tolerance For Single-Mode Fiber Optic Cable

Cable Type Allowable Attentuation Maximum Drive Distance

Single Mode
8/125-12/125 µm

Typical Signal Attenuation Rate: ≤ 0.5 dB/km

10.0 dB or less 10 km (10,936.0 yards)

Attenuation T esting

Fiber optic cable must be tested with an attenuation test set adjusted for
an 850 nm wavelength for Multimode and 1300 nm for Single Mode. This
test ensures that a cable’s signal loss is within acceptable limits.

C-3

MEDIA SPECIFICATIONS

C-4

INDEX

A

Attaching cabling 2-9
Attenuation level, signal B-3, C-3
Autowrap 1-3, 5-4

B

Back cover, removing 2-5
Blinking LED 2-13, 2-14

C

Cabling

connecting fiber optic

segments 2-10

determining maximum drive

distance B-4

determining ring station

count 2-11
general recommendations B-2
maximum lengths 2-9
performance requirements B-3

Cabling, signal interference

crosstalk B-3
noise B-3
temperature B-3

Conversion module(s)

attaching cabling to a fiber ST

port 2-10, 2-11
attaching cabling to an RJ45

port 2-10
installation in MCC-16 2-7, 2-8
unpacking procedure 2-7

Conversion modules

an overview 1-4
dimensions A-1

D

Data connector (MIC) B-7
Default hardware settings 3-3, 4-3,

5-3, 6-3

E

Electrostatic discharge 2-2, 2-6
Environmental requirements

temperature A-1

Environmental specifications

humidity A-1

F

Fiber optic cable

specifications C-3

G

Getting help xi
Grounded power source 2-1

see also Installation

Grounding wriststrap 2-4

I

Installation

resolving problems with 2-12,

2-13, 2-14

L

Lobe cabling

described B-2

Lobe Port B-2

IX-1

INDEX

M

MCC-16

dimensions A-1
functional overview 1-2
installation considerations 2-1
packaging contents 2-3
power up/connecting to a power

source 2-6

shutting down the chassis 2-6
unpacking procedure 2-3

MCC-CRIO

an overview 1-5, 5-2
configuring the 5-3, 5-4, 5-5
connecting Cabletron RI/RO

devices 5-4

connecting other vendor RI/RO

devices 5-5

LED function description 5-5, 5-7
type of ports 1-2

MCC-D2PM

an overview 1-5, 6-2
configuring the 6-3, 6-5
LED function description 6-5, 6-6
splitting the MAU into two

rings 6-3

type of ports 1-2

MCC-DFL

an overview 1-4, 4-2
configuration for attaching the RJ45

port to a RI port 4-7

configuration for attaching the RJ45

port to a RO port 4-6

configuration for connecting a

station to the fiber ST
port 4-5

Configuration for connecting a

station to the RJ45 port 4-4

configuring the 4-3
LED function description 4-11,

4-12, 4-13

selecting ring speed 4-8
switches on the 4-9, 4-10
type of ports 1-2

MCC-FRIO

an overview 1-4, 3-2
configuring the 3-3, 3-4
LED function description 3-5, 3-6
type of ports 1-2

MCC-PS

attaching power cord 2-6
installation procedure 2-4
LEDs 2-5
power output A-2
unpacking procedure 2-4

N

Network

speed-fault protection 1-3

O

Operating temperature A-1

P

Power ON/OFF procedure 2-6

R

RI/RO

Connecting to devices of other

vendors 5-5
Ring In Port B-1
Ring Out Port B-1

S

Shielded Twisted Pair (STP)

specifications C-2

Signal assignments

lobe port pins B-5
RI port pins B-6
RO port pins B-6

station port pins B-4
Speed-fault protection ports 1-3
Station Port B-2
Station/Lobe

configuring the MCC-DFL 4-4

IX-2

T

Technical support xi
Temperature

Storage A-1
Temperature, limits for MCC-16 2-1
Troubleshooting

checklist 2-12, 2-13, 2-14
Trunk cabling

described B-1

W

Wrap 1-3
Wriststrap, anti-static 2-3

INDEX

IX-3

INDEX

IX-4