Cabletron Systems TRMIM-22 User manual

CABLETRON SYSTEMS, P.O. Box 5005, Rochester, NH 03867-0505
TRMIM-22/24/42/44
TOKEN RING
MEDIA INTERFACE MODULES
INSTALLATION GUIDE

NOTICE
i
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 October 1992 by:
Cabletron Systems, Inc.
P.O. Box 5005
Rochester, NH 03867-0505
All Rights Reserved
Printed in the United States of America
Order Number: 9030257-02 October 92
FNB, Multi Media Access Center, Remote LANVIEW and
LANVIEW are registered trademarks of Cabletron Systems, Inc.
TRRMIM-A,TRRMIM-2A,TRRMIM-4A,TRMIM-22, TRMIM-24,
TRMIM-42, TRMIM-44, Flexible Network Bus and MMAC are
trademarks of Cabletron Systems, Inc.
IBM is a registered trademark of International Business Machines
Corporation.

FCC NOTICE
ii
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.
NOTE: This equipment has been tested and found to comply with
the limits for a Class A digital device, pursuant to Part 15 of 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 at
his own expense 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 equipment with respect to the receiving antenna.
• Move the equipment away from the receiver.
• Plug the equipment into a different outlet so that the equipment
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:
“Interference Handbook”
This booklet is available from the U.S. Government Printing Office,
Washington D.C. 20402 - Stock No. 004-000-00482-5.

Page 1-1
INTRODUCTION
CHAPTER 1
INTRODUCTION
Welcome to the Token Ring Media Interface Modules
Installation Guide. This manual serves as a reference for installing
and troubleshooting Cabletron Systems TRMIM-22, TRMIM-24,
TRMIM-42, and TRMIM-44.
The TRMIM-22, TRMIM-24, TRMIM-42, and TRMIM-44 comprise a
family of Token Ring Concentrator modules. The TRMIM-22 and
TRMIM-24 provide 12 and 24 trunk coupling unit (TCU) ports,
respectively, that support voice grade unshielded twisted pair (UTP)
cabling. The TRMIM-42 and TRMIM-44 have 12 and 24 TCU ports,
respectively, supporting IBMtype 1, 2, 6, and 9 shielded twisted pair
(STP) cabling.
Both UTP concentrator modules and both STP concentrator modules
are equipped with RJ-45 modular connectors. The STP concentrator
module RJ-45 connectors provide for connection of the cabling shield.
All four concentrator modules are designed for installation in any
Cabletron Systems Multi Media Access Center(MMAC) equipped
with a Flexible Network Bus(FNB). All four concentrator
modules are IEEE 802.5 compliant and compatible with IBM
products.
NOTE: The term Concentrator Module is used throughout this
manual when describing features and functions that are common to
the TRMIM-22, TRMIM-24, TRMIM-42, and TRMIM-44. The terms
TRMIM-22, TRMIM-24, TRMIM-42, and TRMIM-44 are used when
it is necessary to describe features that are unique to any device.
1.1 USING THIS MANUAL
Prior to installing and operating your concentrator module, read
through this manual completely to familiarize yourself with its
contents and to gain an understanding of the features of the
concentrator module.
A general working knowledge of Token Ring (IEEE 802.5) networks
will be helpful when installing your concentrator module.

Page 1-2
INTRODUCTION
Chapter 1, Introduction, describes how to use this document,
provides an overview of the features and capabilities of each
concentrator module, and concludes with a list of related manuals.
Chapter 2, Installation Requirements/Specifications, lists the
network requirements that must be met before you begin installing
your concentrator module. Detailed specifications for each of the
concentrator modules is also provided.
Chapter 3, Installing the Concentrator Module, contains
instructions for installing a concentrator module into the MMAC, and
attaching token ring station cabling.
Chapter 4, Testing and Troubleshooting, describes checks that
you can perform if you encounter problems after installing a
concentrator module. Instructions for using LANVIEW, Cabletron
Systems’ built-in visual diagnostic and status monitoring system, are
also included.
1.2 THE CONCENTRATOR MODULES
The TRMIM-22, TRMIM-24, TRMIM-42, and TRMIM-44, shown in
Figure 1-1, can be installed as a free standing token ring network or
to provide UTP or STP connectivity to an existing token ring network.
All four concentrator modules are designed for installation into a
Cabletron Systems MMAC. Since they do not have externally
accessible Ring-In and Ring-Out ports, they are considered
concentrator modules. (A concentrator in token ring applications is
defined as a device with multiple TCU ports bounded by externally
accessible Ring-In and Ring-Out ports.)
All four concentrator modules are designed for installation into a
Cabletron Systems MMAC, where they can be used to create an
independent 12 or 24 port ring or to expand an existing token ring
network. When any concentrator module is used within an MMAC,
the concentrator module is connected through the MMAC backplane
via the Flexible Network Bus (FNB) to other token ring MIMs,
repeaters, bridges, or management modules.
The MIMs automatically attach to each other through the FNB when
positioned in adjacent slots and configured with identical ring speed
settings.

Page 1-3
INTRODUCTION
Figure 1-1. The TRMIM-22, TRMIM-24, TRMIM-42,
and TRMIM-44 Token Ring Concentrator Modules
Features of the concentrator module include:
Number of Connections
• TRMIM-22 12 - Unshielded RJ-45 ports
• TRMIM-42 12 - Shielded RJ-45 ports
• TRMIM-24 24 - Unshielded RJ-45 ports
• TRMIM-44 24 - Shielded RJ-45 ports
Multiple concentrator modules can be installed into an MMAC to
increase the number of UTP/STP ports available on a token ring
network.
TRMIM-22
UTP
TOKEN RING
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TRMIM-24
UTP
TOKEN RING
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TRMIM-42
STP
TOKEN RING
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TRMIM-44
STP
TOKEN RING
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Page 1-4
INTRODUCTION
Multiple Concentrator Modules
Several concentrator modules can be installed into a single MMAC
and configured as independent rings or linked together into a single
ring network. Configuration guidelines can be found in Chapter 3,
Installing the Concentrator Module.
Multiple MMACs in a Ring Network
Several MMACs can be connected into the same ring network by
installing token ring concentrators (TRMIM-10R/20R with externally
accessible Ring-In/Ring-Out ports) or token ring repeaters
(TRRMIM-A/2A/4A). The choice between using concentrators or
repeaters depends on specific network configurations. Refer to
Cabletron Systems TRMIM-10R/20R Installation Guideor
TRRMIM-A/2A/4A Installation Guide for more information on the
use of these products or contact Cabletron Systems Technical
Support.
A variety of network management tools can be used to control and
monitor these repeaters, including Cabletron Systems Local
Management, Remote LANVIEW/Windows, and SPECTRUM.
LANVIEW LEDs
Several LEDs, on the front panel of the concentrator module, are used
to indicate the ring speed, a bypass condition, status, and
management statistics for each of the TCU ports. LANVIEW is an
effective tool to help you quickly diagnose your physical layer network
problems.

Page 1-5
INTRODUCTION
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.
Cabletron Systems Multi Media Access Center Overview and Set
Up Guide
Cabletron Systems TRRMIM-A, TRRMIM-2A, & TRRMIM-4A
Token Ring Repeaters Installation Guide
Cabletron Systems TRMIM-10R STP Token Ring Concentrator
Installation Guide
Cabletron Systems TRMIM-12 Token Ring 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 (1989)
Commercial Building Wiring Standard, EIA Standard
Proposal No. 1907-B(if approved, to be published as EIA/TIA-568)
LAN Troubleshooting Handbook, Mark Miller (1989, M&T
Publishing)

Page 1-6
INTRODUCTION
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, contact Cabletron Systems
Technical Support at:
Cabletron Systems
P. O. Box 5005
Rochester, NH 03867-0505
Phone: [phone]

REQUIREMENTS/SPECIFICATIONS
Page 2-1
CHAPTER 2
INSTALLATION
REQUIREMENTS/SPECIFICATIONS
Before you attempt to install your concentrator module, review the
installation requirements and operating specifications that are
outlined in this chapter.
Your network installation must meet the conditions, guidelines,
specifications, and requirements included in this chapter to obtain
satisfactory performance from this equipment. Failure to follow these
guidelines could produce poor network performance.
2.1 NETWORK REQUIREMENTS
Take care in planning and preparing the cabling and connections for
your network. The quality of the connections, the length of cables
and other conditions of the installation are critical factors in
determining the reliability of your network. Work area wall plates/
outlets used for your token ring network should be clearly labeled as
token ring network lobe connections.
The following sections describe network requirements for this
equipment.
2.1.1 Cable Specifications
The media used for station (lobe) cabling depends on your specific
concentrator module:
• The TRMIM-22 and TRMIM-24 support voice grade UTP cable, as
described in EIA Standard Proposal No. 1907-A, and IBM Type 3
UTP cabling.
• The TRMIM-42 and TRMIM-44 support IBM shielded twisted
pair (STP) cable Types 1, 2, 6, and 9 at their trunk coupling unit
(TCU) ports.