Cabletron Systems TRMIM-20R User manual
TRMIM-20R
UTP TOKEN RING
CONCENTRATOR
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
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 March 1991 by:
Cabletron Systems, Inc.
P.O. Box 5005, Rochester, NH 03867-5005
All Rights Reserved
Printed in the United States of America
Order Number: 9030275-01 March 1991
TRMIM-20R, TRMIM-10R, TRRMIM-16, TRMIM-12,
Remote LANVIEW/Windows, SPECTRUM, and MMAC are
trademarks of Cabletron Systems, Inc.
LANVIEW is a registered trademark 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
received, 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
iii
CONTENTS
CHAPTER 1 INTRODUCTION
1.1 Using This Manual ......................................................................1-1
1.2 The TRMIM-20R..........................................................................1-2
1.3 Related Manuals..........................................................................1-4
1.4 Recommended Reading ...............................................................1-5
1.5 Getting Help ................................................................................1-5
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 Impedance .........................................................................2-4
2.1.4 Attenuation .......................................................................2-4
2.1.5 Maximum Number Of Stations ........................................2-4
2.1.6 Crosstalk............................................................................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 Ring Sequence ...................................................................2-5
2.2.3 Connector Types................................................................2-6
2.2.4 LANVIEW LEDs ...............................................................2-8
2.2.5 General Specifications ......................................................2-9
CHAPTER 3 INSTALLING THE TRMIM-20R
3.1 Unpacking The TRMIM-20R ......................................................3-1
3.2 Installing The TRMIM-20R Into The MMAC ............................3-2
3.3 Cabling The TRMIM-20R............................................................3-4
3.3.1 Lobe Cabling......................................................................3-4
3.3.2 Trunk Cabling ...................................................................3-6
3.4 Finishing The Installation ..........................................................3-8
CONTENTS (CONT.)
CHAPTER 4 TESTING AND TROUBLESHOOTING
4.1 Installation Checkout ..................................................................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-4
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-8
C.4 Calculating Mixed Cable Types ...............................................C-15
iv
CONTENTS
INTRODUCTION
Page 1-1
CHAPTER 1
INTRODUCTION
Welcome to the TRMIM-20R 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-20R.
The TRMIM-20R is a token ring network concentrator used in
conjunction with Cabletron System’s Multi Media Access Center
(MMAC). The TRMIM-20R provides ten trunk coupling unit ports
and passive Ring-In and Ring-Out ports. The TRMIM-20R is IEEE
802.5 compliant, and compatible with IBM products. Since the Ring-
In/Ring-Out ports are passive and do not regenerate signal timing,
Adjusted Ring Length (ARL) must be considered when planning cable
lengths.
Prior to installing and operating the TRMIM-20R, read through this
manual to familiarize yourself with its content and to gain an
understanding of the features of TRMIM-20R. A general working
knowledge of Token Ring (IEEE 802.5) networks will be helpful when
installing the TRMIM-20R.
1.1 USING THIS MANUAL
Chapter 1, Introduction, covers using this document, briefly
describes features of the TRMIM-20R and token ring, and lists
related manuals.
Chapter 2, Installation Requirements/Specifications, lists
network requirements that must be met before you install the
TRMIM-20R and specifications for the TRMIM-20R.
Chapter 3, Installing the TRMIM-20R, describes installing the
TRMIM-20R into the MMAC, connecting stations, and inserting the
TRMIM-20R into a token ring network.
INTRODUCTION
Page 1-2
Chapter 4, Testing and Troubleshooting, describes LANVIEW,
Cabletron Systems’ built-in visual diagnostic and status monitoring
system, and gives procedures for verifying the proper installation of
the TRMIM-20R.
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 in a passive token ring
network.
1.2 THE TRMIM-20R
The TRMIM-20R, shown in Figure 1-1, is a Media Interface Module
(MIM) that can be installed into a Cabletron Systems’ MMAC-8FNB,
MMAC-8, MMAC-5FNB, MMAC-3FNB or MMAC-3.
The TRMIM-20R functions as a ten port concentrator in a token ring
network providing passive Ring-In and Ring-Out ports and ten trunk
coupling ports.
The TRMIM-20R provides two DB-9 and ten RJ-45 connectors on the
front panel. Two DB-9 connectors permit attachment for shielded
twisted pair (STP) Ring-In and one Ring-Out trunk cabling. Ten
unshielded twisted pair (UTP), RJ-45 connectors support trunk
coupling ports for up to ten token ring stations.
The Ring-In and Ring-Out ports support IBM Type 1, 2, 6 and 9 STP
cable. Each of the TRMIM-20R trunk coupling unit ports supports
station connections via voice grade UTP.
Since the Ring-In and Ring-Out ports are passive trunk connections,
trunk cable length must be calculated giving consideration to
Adjusted Ring Length (ARL). Refer to Appendix C, Calculating
Ring Length, to determine trunk cable length.
INTRODUCTION
Page 1-3
The TRMIM-20R supports voice grade UTP at lobe lengths of up to
100 metersat 4 Mbit/sec and up to 60 meters at 16 Mbit/sec.
Supported cable types and lengths are listed in Chapter 2,
Installation Requirements/Specifications.
Figure 1-1. TRMIM-20R Token Ring Concentrator
TRMIM-20R
RI
RO
UTP
TOKEN RING
1
X
2
X
3
X
4
X
5
X
6
X
7
X
8
X
9
X
10
X
INTRODUCTION
Page 1-4
It is possible to have several network types and media in one MMAC,
such as a shielded twisted pair token ring network and a thin-net
Ethernet network. There are a number of configuration guidelines
concerning multiple networks within an MMAC. These guidelines
are listed in Chapter 3, Installing the TRMIM-20R.
Several MMACs can be connected into the same ring network by
installing token ring concentrators (TRMIM-10R/TRMIM-20R) or
token ring repeaters (TRRMIM-16/TRRMIM-26). The choice between
using concentrators or repeaters depends on specific network
configurations.
The TRMIM-20R incorporates LANVIEW, a useful tool to help you
quickly diagnose physical layer network problems. Several LEDs
(light emitting diodes) are located at the front of the TRMIM-20R.
These LEDs indicate the ring speed, detection of a TRMIM-20R
hardware error, and when a specific port is attached to the ring.
A variety of network management tools can be used to control and
monitor the TRMIM-20R, including Cabletron Systems Local
Management, Cabletron Systems Remote LANVIEW Windows, and
Cabletron Systems SPECTRUM.
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-10R Token Ring Concentrator
Media Interface Module Installation Guide.
Cabletron Systems’ TRMIM-12 Token Ring Media Interface
Module Installation Guide.
Cabletron Systems’ TRRMIM-16 Token Ring Repeater Media
Interface Module Installation Guide.
INTRODUCTION
Page 1-5
Cabletron Systems’ TRMIM-22 UTP Passive 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
Commercial Building Wiring Standard, EIA Standard
Proposal No. 1907-A(if approved, to be published as EIA/TIA-568)
LAN Troubleshooting Handbook, Mark Miller (1989, M&T
Publishing, Inc.)
1.5 GETTING HELP
If you need additional support related to the Cabletron Systems’
TRMIM-20R, or if you have any questions, comments or suggestions
related to this manual, please contact Cabletron Systems Technical
Support at:
Cabletron Systems
P. O. Box 5005
Rochester, NH 03867-0505
Phone: (603) 332-9400
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