Cabletron Systems TRMIM-10R User manual

TRMIM-10R
TOKEN RING
MEDIA INTERFACE MODULE
INSTALLATION GUIDE
CABLETRON SYSTEMS, P. O. Box 5005, Rochester, NH 03867-5005
The Complete Networking Solution

NOTICE
Cabletron Systems reserves the right to make changes in specifica-
tions 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 MAN-
UAL OR THE INFORMATION CONTAINED IN IT, EVEN IF
CABLETRON SYSTEMS HAS BEEN ADVISED OF, KNOWN, OR
SHOULD HAVE KNOWN, THE POSSIBILITY OF SUCH DAM-
AGES.
Copyright November 1990 by:
Cabletron Systems, Inc.
P.O. Box 5005, Rochester, NH 03867-5005
All Rights Reserved
Printed in the United States of America
Order Number: 9030258 November 90
LANVIEW, Remote LANVIEW Windows,Spectrum,
TRMIM-10R, TRRMIM-16, TRMIM-12, MMAC, and FNB are
trademarks of Cabletron Systems Inc.
IBM is a registered trademark of International Business Machines
Corporation.
NOTICE
i

FCC NOTICE
This device complies with Part 15 of 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 re-
ceived, including interference that may cause undesired operation.
WARNING: This equipment uses and generates and can radiate
radio frequency energy and if not installed properly and used in
accordance with the instruction manual, may cause interference to
radio communications. It has been tested and found to comply with
the limits for a Class A digital device pursuant to Part 15 of FCC
Rules, which are designed to provide reasonable protection against
such interference in a commercial environment. Operation of this
equipment in a residential area is likely to cause interference in
which case the user at his own expense will be required to take
whatever steps may be necessary to correct the interference.
If this equipment does cause interference to radio or television, which
can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the
following measures:
• Re-orient the receiving antenna.
• Relocate the MMAC with respect to the receiving antenna.
• Move the MMAC away from the receiver.
• Plug the MMAC into a different outlet so that the MMAC and
the receiver are on different branch circuits.
If necessary, the user should consult the dealer or an experienced
radio/television technician for additional suggestions. The user may
find the following booklet prepared by the Federal Communication
Commission helpful:
“How to Identify and Resolve Radio TV Interference Problems”
This booklet is available from the U.S. Government Printing Office,
Washington D.C. 20402 - Stock No. 004-000-00345-4
FCC NOTICE
ii

CONTENTS
CONTENTS
CHAPTER PAGE
CHAPTER 1 INTRODUCTION
1.1 Using This Manual ......................................................................1-1
1.2 The TRMIM-10R ..........................................................................1-2
1.3 Related Manuals ..........................................................................1-4
1.4 Recommended Reading................................................................1-4
1.5 Getting Help.................................................................................1-4
CHAPTER 2 INSTALLATION REQUIREMENTS/
SPECIFICATIONS
2.1 Network Requirements................................................................2-1
2.1.1 Cable Types ........................................................................2-1
2.1.2 Cable Lengths.....................................................................2-2
2.1.3 Attenuation.........................................................................2-3
2.1.4 Impedance...........................................................................2-4
2.1.5 Crosstalk.............................................................................2-4
2.1.6 Maximum Number of Stations ..........................................2-4
2.1.7 Noise ...................................................................................2-5
2.1.8 Temperature .......................................................................2-5
2.2 Operating Specifications..............................................................2-5
2.2.1 Ring Speed..........................................................................2-5
2.2.2 Connector Types .................................................................2-5
2.2.3 Ring Sequence ....................................................................2-7
2.2.4 LANVIEW LEDs ................................................................2-7
CHAPTER 3 INSTALLING THE TRMIM-10R
3.1 Unpacking the TRMIM-10R ........................................................3-1
3.2 Installing the TRMIM-10R into the MMAC...............................3-1
3.3 Attaching Cables to the TRMIM-10R .........................................3-4
3.3.1 Connecting Lobe Cabling ...................................................3-4
3.3.2 Connecting Trunk Cabling ................................................3-6
3.4 Finishing the Installation............................................................3-7
iii

CONTENTS
iv
CONTENTS (Cont.)
CHAPTER 4 TESTING AND TROUBLESHOOTING
4.1 Installation Check-Out ................................................................4-1
4.2 Using LANVIEW .........................................................................4-2
APPENDIX A BASIC TOKEN RING NETWORKS
A.1 Basic Token Ring Operation .......................................................A-1
A.2 Design Considerations.................................................................A-7
APPENDIX B APPLICATIONS
B.1 Adding to an Existing Token Ring Network.............................B-1
B.2 Separate Token Ring Networks in One MMAC .......................B-2
B.3 Token Ring Networks Bridged Together ..................................B-3
B.4 MMAC with Ethernet and Token Ring Simultaneously..........B-3
APPENDIX C CALCULATING RING LENGTH
C.1 Rules for Calculating Cable Lengths ........................................C-1
C.2 Single Wiring Closet Networks .................................................C-2
C.3 Multiple Wiring Closet Networks .............................................C-9
C.4 Calculating Mixed Cable Types ...............................................C-15

INTRODUCTION
Page 1-1
CHAPTER 1
INTRODUCTION
Welcome to the TRMIM-10R Token Ring Passive Concentrator
Media Interface ModuleInstallation Guide. This guide is
designed to serve as a reference for the installation and
troubleshooting of Cabletron Systems' TRMIM-10R.
The TRMIM-10R is a token ring network concentrator used in
conjunction with Cabletron's Multi Media Access Center (MMAC).
The TRMIM-10R provides ten trunk unit coupling ports and passive
Ring-In and Ring-Out ports. The Ring-In/Ring-Out ports and each of
the TRMIM-10R's ten trunk coupling unit ports support IBMTypes
1, 2, 6, and 9 shielded twisted pair cabling. The TRMIM-10R is IEEE
802.5 compliant, and compatible with IBM products.
Prior to installing and operating the TRMIM-10R, read through this
manual completely to familiarize yourself with its content and to gain
an understanding of the features of the TRMIM-10R. A general
working knowledge of token ring (IEEE 802.5) networks will be
helpful when installing the TRMIM-10R.
1.1 USING THIS MANUAL
Chapter 1, Introduction, covers using this document, briefly
describes features of the TRMIM-10R and token ring, and concludes
with a list of related manuals.
Chapter 2, Installation Requirements/Specifications, lists
network requirements that must be met before you install the
TRMIM-10R and specifications for the TRMIM-10R.
Chapter 3, Installing the TRMIM-10R, describes installing the
TRMIM-10R into the MMAC, attaching station cabling and
connecting the TRMIM-10R to a token ring network.
Chapter 4, Testing and Troubleshooting, includes a description of
LANVIEW, Cabletron Systems' built-in visual diagnostic and
status monitoring system and procedures for verifying the proper
installation of the TRMIM-10R.

INTRODUCTION
Page 1-2
Appendix A, Basic Token Ring Networks, covers basic operation
and concepts related to the design of token ring networks.
Appendix B, Applications, presents a variety of network
configurations, showing practical applications for several Cabletron
Systems' token ring products.
Appendix C, Calculating Ring Length, describes methods for
calculating various ring cable lengths for passive devices in a token
ring network.
1.2 THE TRMIM-10R
This section outlines some of the basic features of the TRMIM-10R.
The TRMIM-10R, shown in Figure 1-1, is a Media Interface Module
(MIM) that can be installed into a Cabletron Systems' MMAC (Multi
Media Access Center). The TRMIM-10R functions as a ten port
concentrator module in a token ring network providing passive Ring-
In and Ring-Out ports and ten trunk coupling ports.
Twelve DB-9 connectors on the front panel of the TRMIM-10R
provide one Ring-In port, one Ring-Out port for connecting the
TRMIM-10R into a token ring network and ten trunk coupling ports
for attaching ten stations.
The TRMIM-10R supports lobe lengths up to 200 meters at 4 Mbit/sec
and 100 meters at 16 Mbit/sec using IBM Type 1 or Type 2 shielded
twisted pair cable. The supported types and lengths of cables are
listed in Chapter 2, Installation Requirements/Specifications.
The Ring-In/Ring-Out ports provide passive trunk connections using
IBM Type 1 or Type 2 shielded twisted pair cable. Trunk cable
lengths must consider Adjusted Ring Length (ARL). Refer to
Appendix C, Calculating Ring Length, to determine trunk cable
length.
The Flexible Network Bus (FNB) provides an internal trunk
connection between multiple Cabletron Systems' Token Ring products
operating at the same ring speed and installed in consecutive slots
within the same MMAC. The FNB is an active interface that
regenerates and retimes ring signals between boards on the FNB.

INTRODUCTION
Page 1-3
Several LEDs are located on the front panel of the TRMIM-10R.
These LEDs indicate the ring speed, the detection of a hardware error
in the TRMIM-10R, and the status of TRMIM-10R ports. These
LEDs are a useful tool for quickly diagnosing physical layer problems.
A variety of network manangment tools can be used to control and
monitor the TRMIM-10R, including Cabletron Systems Local
Management, Cabletron Systems Remote LANVIEW Windows, and
Cabletron Systems Spectrum.
Figure 1-1. TRMIM-10R Token Ring Concentrator
TOKEN RING
TRMIM-10R
1
2
3
4
5
6
7
8
9
10
RI
RO

INTRODUCTION
Page 1-4
1.3 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 in this document.
Cabletron Systems' Multi-Media Access Center Overview and
Set Up Guide.
Cabletron Systems' TRMIM-12 Token Ring Media Interface
Module Installation Guide.
Cabletron Systems' TRRMIM-16 Token Ring Repeater Media
Interface Module Installation Guide.
1.4 RECOMMENDED READING
The following publications are recommended if more information is
required on implementing a Token Ring network.
Local Area Networks, Token Ring Access Method, IEEE
Standard 802.5
LAN Troubleshooting Handbook, Mark Miller (1989, M&T
Publishing, Inc.)
1.5 GETTING HELP
If you need additional support related to the Cabletron Systems'
token ring products, or if you have any questions, comments or
suggestions related to this manual, please contact Cabletron Systems'
Technical Support at:
Cabletron Systems
35 Industrial Way
P. O. Box 5005
Rochester, NH 03867-5005
Phone: [phone]

REQUIREMENTS/SPECIFICATIONS
Page 2-1
CHAPTER 2
INSTALLATION REQUIREMENTS/
SPECIFICATIONS
Before you attempt to install Cabletron Systems' token ring products,
review the installation requirements and operating specifications
outlined in this chapter. The conditions, guidelines and requirements
described in this chapter must be met to obtain satisfactory
performance from this equipment. The reliability of the network is
determined by the quality of the connections, the length of the cables
and other conditions of the installation.
2.1 NETWORK REQUIREMENTS
The following subsections summarize the network requirements to
operate this equipment.
2.1.1 Cable Types
The TRMIM-10R supports IBM shielded twisted pair cable Types 1,
2, 6, and 9 for Lobe and Trunk cabling. Table 2-1 lists all of the IBM
cable types for reference, but the TRMIM-10R supports Types 1, 2, 6,
and 9 only.
Table 2-1. IBM Cable Types
Type 1 Two shielded twisted pairs (STP) of 22 AWG solid wire
for data. Used for the longest cable runs within the
walls of buildings.
Type 2 Similar to Type 1 data cable, but having four additional
unshielded twisted pairs of 24 AWG solid wire. These
are carried outside of the shield casing and are typically
used for voice communication. Frequently used to wire
cable runs within the walls of buildings.