Cabletron Systems TRRMIM-2AT User manual

TRRMIM-AT, TRRMIM-2AT, TRRMIM-4AT
TRRMIM-F2T & TRRMIM-F3T
ACTIVE TOKEN RING
REPEATER MODULES
INSTALLATION GUIDE
CABLETRON SYSTEMS, P. O. Box 5005, Rochester, NH 03867-5005
The Complete Networking Solution™

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 July 1993 by:
Cabletron Systems Inc.
P.O. Box 5005
Rochester NH 03867-0505
All Rights Reserved
Printed in the United States of America
Order Number: 9030502-01 July 93
TRRMIM-AT , TRRMIM-2AT , TRRMIM-4AT , TRRMIM-F2T ,
TRRMIM-F3T , and MMAC are trademarks of
Cabletron Systems, Inc.
LANVIEW and Remote LANVIEW , are registered trademarks of
Cabletron Systems, Inc.
IBM is a registered trademark of International Business Machines
Corporation.

NOTICE
ii
FCC NOTICE
This device complies with Part 15 of the FCC rules. Operation is
subject to the following two conditions: (1) this device may not
cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause
undesired operation.
NOTE: This equipment has been tested and found to comply with
the limits for a Class A digital device, pursuant to Part 15 of the FCC
rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a
commercial environment. This equipment uses, generates, and can
radiate radio frequency energy and if not installed in accordance
with the operator’s manual, may cause harmful interference to
radio communications. Operation of this equipment in a residential
area is likely to cause interference in which case the user will be
required to correct the interference at his own expense.
WARNING: Changes or modifications made to this device which
are not expressly approved by the party responsible for compliance
could void the user’s authority to operate the equipment.
DOC NOTICE
This digital apparatus does not exceed the Class A limits for radio
noise emissions from digital apparatus set out in the Radio
Interference Regulations of the Canadian Department of
Communications.
Le présent appareil numérique n’émet pas de bruits
radioélectriques dépassant les limites applicables aux appareils
numériques de la class A prescrites dans le Règlement sur le
brouillage radioélectrique édicté par le ministère des
Communications du Canada.

CONTENTS
iii
CONTENTS
CHAPTER 1 INTRODUCTION
1.1 Using this Manual........................................................................ 1-1
1.2 The TRRMIM ................................................................................ 1-2
1.2.1 The TRRMIM -AT, TRRMIM-2AT and TRRMIM-4AT 1-3
1.2.2 The TRRMIM-F2T and TRRMIM-F3T ............................ 1-5
1.3 Ring-in Ring-out Connections.................................................... 1-6
1.4 Related Manuals........................................................................... 1-7
1.5 Recommended Reading .............................................................. 1-7
1.6 Getting Help ................................................................................. 1-8
CHAPTER 2 INSTALLATION REQUIREMENTS
SPECIFICATIONS
2.1 Network Requirements............................................................... 2-1
2.1.1 Cable Specifications........................................................... 2-1
2.1.2 Trunk Cable Lengths......................................................... 2-9
2.1.3 Cabling Recommendations ............................................ 2-10
2.1.4 Temperature ..................................................................... 2-12
2.2 Maximum Number of Stations................................................. 2-12
2.3 Operating Specifications ........................................................... 2-12
2.3.1 Ring Speed........................................................................ 2-12
2.3.2 Ring Sequence .................................................................. 2-13
2.3.3 LANVIEW LEDs.............................................................. 2-14
2.3.4 Connectors........................................................................ 2-17
2.3.5 General Specifications..................................................... 2-20
CHAPTER 3 INSTALLING THE REPEATER
3.1 Unpacking the Repeater.............................................................. 3-1
3.2 Setting the Default Ring Speed .................................................. 3-2

CONTENTS
iv
3.3 Installing the Repeater into a MMAC........................................3-3
3.4 Attaching Trunk Cables to the Repeater...................................3-4
3.5 UTP AND STP LOBE CABLING................................................3-4
3.5.1 Attaching Stations to the TRRMIM-2AT ........................3-6
3.5.2 Attaching Stations to the TRRMIM-4AT ........................3-8
3.6 Fiber Optic Lode Cabling ............................................................3-9
3.7 Ring-in Ring-out Ports (TPIM) .................................................3-11
3.8 Finishing the Installation...........................................................3-13
CHAPTER 4 TESTING AND TROUBLESHOOTING
4.1 Installation Check-out..................................................................4-1
4.2 Using LANVIEW..........................................................................4-2

INTRODUCTION
Page 1-1
CHAPTER 1
INTRODUCTION
Welcome to the TRRMIM-AT, TRRMIM-2AT, TRRMIM-4AT,
TRRMIM-F2T, & TRRMIM-F3T Active Token Ring Repeater
Modules Installation Guide . This installation guide serves as a
reference for installing and troubleshooting the Cabletron Systems
token ring repeaters models: TRRMIM-AT, TRRMIM-2AT,
TRRMIM-4AT, TRRMIM-F2T, and TRRMIM-F3T.
The TRRMIMs are designed for installation into a Cabletron
Systems Multi Media Access Center (MMAC). The repeaters are
IEEE 802.5 compliant and can be installed to create an independent
token ring network or connected to other token ring devices and
expand existing networks.
NOTE: The term repeater is used throughout this manual to describe
features and functions that are common to all repeater/MIMs. The terms
TRRMIM-AT, TRRMIM-2AT, TRRMIM-4AT, TRRMIM-F2T, and
TRRMIM-F3T are only used when it is necessary to describe features that
are unique to a specific device.
1.1 USING THIS MANUAL
Prior to installing and operating your repeater, read through this
manual completely to familiarize yourself with its contents and to
gain an understanding of the features of both repeaters. A general
working knowledge of Token Ring (IEEE 802.5) networks will be
helpful when installing the repeater.
Chapter 1, Introduction , describes the features and capabilities of
the TRRMIMs, lists related manuals, and recommended reading.
Chapter 2, Installation Requirements/Specifications , lists
specifications for the TRRMIMs and describes other network
requirements that must be met before you install your token ring
repeater.

INTRODUCTION
Page 1-2
Chapter 3, Installing the Repeater , gives instructions for installing
a token ring repeater into an MMAC, connecting stations, and
inserting the repeater into a token ring network.
Chapter 4, Testing and Troubleshooting , describes testing and
troubleshooting the installation of the TRRMIM and covers using
LANVIEW
®
, Cabletron Systems built-in visual diagnostic and
status monitoring system.
1.2 THE TRRMIM
The TRRMIM (see Figure 1-1) is a 802.5 compliant token ring
repeater, designed for installation into a Cabletron Systems Multi
Media Access Center (MMAC) that is equipped with a Flexible
Network Bus
™
(FNB). In addition to functioning as a repeater, the
module can serve multiple functions when installed in an MMAC.
Externally accessible Ring-In and Ring-Out ports, provided by the
plug-in Token Ring Port Interface Modules (TPIM), may use either
fiber optic, unshielded twisted pair (UTP), or shielded twisted pair
(STP) cabling. Ring connections are also made via the MMAC
Flexible Network Bus, allowing other MIMs to be a part of the ring.
Both the internal and external ring connections are active
connections and provide regeneration, reshaping and retiming of
both the main and backup signal paths.
Since the TPIM Ring-In and Ring-Out ports on the repeaters allow
connection of either fiber optic or STP cabling, they can be
configured to function as a copper to fiber optic converter .
The repeaters can be set to operate at ring speeds of either
4 Mbit/sec or 16 Mbit/sec. All equipment in a single ring network
must be set to the same ring speed. They cannot be mixed.
To connect two networks with different ring speeds, a bridging
device must be installed.
Repeaters installed in an MMAC (equipped with an FNB) and
MIMs operating with same MAC layer protocol (Token Ring/

INTRODUCTION
Page 1-3
802.5) and link speed (4 Mbit/s or 16 Mbit/s) can be linked, via the
FNB, into a single token ring network. Multiple MMACs can be
connected via the externally accessible Ring-In/Ring-Out ports of
the repeater.
Any SNMP manager can be used to control and monitor these
repeaters when a management module (TRMM, TRMMIM, or
TRBMIM) is installed in the MMAC. Management packages such as
Cabletron Systems Local Management, Remote LANVIEW/
Windows
®
, and SPECTRUM
®
may be used.
LANVIEW LEDs are visible at the front panel of the repeaters
showing the status of several operational functions of the repeaters.
LANVIEW is a useful tool for quickly diagnosing physical layer
problems.
1.2.1 The TRRMIM -AT, TRRMIM-2AT and TRRMIM-4AT
The TRRMIM-AT, TRRMIM-2AT, and TRRMIM-4AT have two
front panel TPIMs for Ring-in and Ring-out connections
(see Figure 1-1). A variety of media types are supported.

INTRODUCTION
Page 1-4
Figure 1-1 The TRRMIM-AT, -2AT, and -4AT
The TRRMIM-2AT provides twelve active unshielded RJ-45
connectors supporting unshielded twisted pair (UTP) station (lobe)
cabling. These ports support voice grade unshielded twisted pair
(UTP) and IBM Type 3 UTP cable.
ERR
16 MBMGMT
RI RO
CRS16
PEN
AWEN
TRRMIM-AT
R
I
T
P
I
M
R
O
T
P
I
M
ERR
16 MBMGMT
RI RO
CRS16
PEN
AWEN
TRRMIM-2AT
R
I
T
P
I
M
R
O
T
P
I
M
LNK
PEN
1
2
3
4
5
6
7
8
9
10
11
12
1
X
2
X
3
X
4
X
5
X
6
X
7
X
8
X
9
X
10
X
11
X
12
X
ERR
16 MBMGMT
RI RO
CRS16
PEN
AWEN
TRRMIM-4AT
R
I
T
P
I
M
R
O
T
P
I
M
LNK
PEN
1
2
3
4
5
6
7
8
9
10
11
12
1
X
2
X
3
X
4
X
5
X
6
X
7
X
8
X
9
X
10
X
11
X
12
X

INTRODUCTION
Page 1-5
The TRRMIM-4AT provides twelve active shielded RJ-45 TCU
ports supporting Shielded twisted pair (STP) cabling. These ports
support IBM Type 1, 2, 6 and 9 shielded twisted pair cable.
1.2.2 The TRRMIM-F2T and TRRMIM-F3T
The TRRMIM-F2T, and TRRMIM-F3T have two front panel TPIMs
for Ring-in and Ring-out connections (see Figure 1-2). A variety of
media types are supported.
Both repeaters provide six fiber optic ports for station (lobe)
cabling. The TRRMIM-F2T supports multimode fiber optic cable
and the TRRMIM-F3T support single mode cable for the lobe
connections.

INTRODUCTION
Page 1-6
Figure 1-2 The TRRMIM-F2T and TRRMIM-F3T
1.3 RING-IN RING-OUT CONNECTIONS
TPIMs are used for the Ring-in and Ring-out connections and
provide for many types of media. Table 1-1 lists the available
TPIMs.
ERR
16 MBMGMT
RI RO
CRS16
PEN
AWEN
TRRMIM-F2T
R
I
T
P
I
M
R
O
T
P
I
M
TX
RX
FLNK
INS
1
TX
RX
FLNK
INS
2
TX
RX
FLNK
INS
3
TX
RX
FLNK
INS
4
TX
RX
FLNK
INS
5
TX
RX
FLNK
INS
6
ERR
16 MBMGMT
RI RO
CRS16
PEN
AWEN
TRRMIM-F3T
R
I
T
P
I
M
R
O
T
P
I
M
TX
RX
FLNK
INS
1
TX
RX
FLNK
INS
2
TX
RX
FLNK
INS
3
TX
RX
FLNK
INS
4
TX
RX
FLNK
INS
5
TX
RX
FLNK
INS
6

INTRODUCTION
Page 1-7
1.4 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 Token Ring Local Management for the
Cabletron Systems TRMM
1.5 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-B (if approved, to be published as EIA/TIA-568 )
Table 1-1 Available TPIMs
TPIM Media Type Connector
TPIM-T1 Shielded Twisted Pair DB9
TPIM-T2 Unshielded Twisted Pair RJ-45
TPIM-T4 Shielded Twisted Pair RJ-45
TPIM-F2 Multi-mode Fiber Optic ST
TPIM-F3 Single mode Fiber Optic ST

INTRODUCTION
Page 1-8
LAN Troubleshooting Handbook , Mark Miller (1989, M&T
Publishing, Inc.)
1.6 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, Inc.
P. O. Box 5005
Rochester, NH 03867-0505
Phone: [phone]

REQUIREMENTS/SPECIFICATIONS
Page 2-1
CHAPTER 2
INSTALLATION
REQUIREMENTS/SPECIFICATIONS
This chapter defines the requirements for other network elements
that will work with your token ring repeater and describes the
operational specifications for the TRRMIM-AT, TRRMIM-2AT
TRRMIM-4AT, TRRMIM-F2T, and TRRMIM-F3T. Before installing
your repeater, review the requirements and specifications that are
outlined in this chapter.
All conditions, guidelines, specifications, and requirements
included in this chapter must be satisfied to achieve optimum
performance from this equipment. Failure to follow these
guidelines may result in unsatisfactory 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. The following are the
network requirements to operate this equipment.
2.1.1 Cable Specifications
Trunk Cabling - The repeaters support UTP, STP, single-mode
fiber, or multi-mode fiber, depending upon the TPIM used.
Lobe Cabling - The media used for lobe cabling depends on your
specific repeater:
• The TRRMIM-2AT supports voice grade UTP cable, as
described in EIA Standard Proposal No. 1907-B, and IBM Type
3 (and category 4 and 5) UTP cabling on its twelve trunk
coupling unit (TCU) ports.

REQUIREMENTS/SPECIFICATIONS
Page 2-2
• The TRRMIM-4AT supports IBM shielded twisted pair (STP)
cable Types 1, 2, 6, and 9 on its twelve trunk coupling unit
(TCU) ports.
• The TRRMIM-F2T supports multi-mode fiber optic cables using
ST connectors.
• The TRRMIM-F3T supports single-mode fiber optic cable using
ST style connectors.
STP CABLE TYPES
The TRRMIM-4AT, TPIM-T1 and TPIM-T4 support IBM Type 1, 2,
6, and 9 STP cabling as described in Table 2-1. STP cabling must
conform to the limits shown in Table 2-2.

REQUIREMENTS/SPECIFICATIONS
Page 2-3
Table 2-1 IBM Cable Types
Attenuation and Impedance
The maximum attenuation for specific STP cable types is shown in
Table 2-2. The attenuation values include the attenuation of the
cables, connectors, patch panels, and reflection losses due to
impedance mismatches in the segment.
Table 2-2 STP Cable Specifications
Frequency Impedance Attenuation
Types 1 & 2
4 Mhz
16 Mhz 150
Ω ± 15%
150 Ω ± 15% <22 dB/km (6.7 dB/1000 ft.) <45 dB/km (13.7 dB/1000 ft)
Type 6 & 9
4 Mhz
16 Mhz 150
Ω ± 15%
150 Ω ± 15% <33 dB/km (10 dB/1000 ft.) <66 dB/km (20 dB/1000 ft)
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 22 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.
Type 6 Two STP of 26 AWG stranded wire for data. This type is
used in patch panels or to connect devices to/from wall
jacks. Attenuation for Type 6 cable is 3/2 x Type 1 cable
(66 m of Type 6 = 100 meters of Type 1).
Type 9 Similar to Type 1, but uses 26 AWG solid wire. Attenuation
for Type 9 cable is 3/2 x Type 1 cable (66 m of Type 9 =
100 meters of Type 1).

REQUIREMENTS/SPECIFICATIONS
Page 2-4
MAXIMUM CABLE LENGTH
Two cable lengths are defined for the repeaters, Lobe Length and
Trunk Length .
Lobe Length - The lobe length is the physical length of the cable
connecting a station to its TCU port at the repeater. Table 2-3 shows
the maximum lobe length, according to ring speed for each
repeater. The cable lengths listed in the table a total length of the
cable that is made up of a single cable type.
Trunk Length - The maximum trunk cable length between
repeaters or between a repeater and another active device is equal
to the maximum drive distance (refer to Table 2-4). When the
neighboring token ring device is a passive device, the combined
length of the connecting trunk cable and twice the longest lobe
cable attached to the passive ring segment cannot exceed the
maximum drive distance.
Table 2-3 Maximum Lobe Length
Cable Type Maximum Lobe Length 4 Mbit/s 16 Mbit/s
STP IBM Types 1 & 2
IBM Type 6 & 9
(only for station to
wall jack and patch
panels)
300 meters 150 meters
(984 feet) (492 feet)
200 meters 100 meters
(656 feet) (328 feet)

REQUIREMENTS/SPECIFICATIONS
Page 2-5
UTP CABLE TYPES
The TRRMIM-2AT and the TPIM-T2 support D-inside wiring
(DIW) voice grade Unshielded Twisted Pair (UTP) cable as
described in EIA SP-1907B . Voice grade UTP cabling (e.g., IBM
Type 3 UTP) must conform to the limits shown in Table 2-3.
The increased popularity and cost advantages of UTP cable have
driven refinements to UTP cable design. As a result, better grades
of UTP cable, known as supergrade or level 4, are becoming
available that exhibit improved transmission characteristics. These
improved grades of UTP can often be used to permit operation at
16 Mbit/sec on longer lobe cables.
Attenuation and Impedance
The maximum attenuation for UTP cabling is shown in Table 2-5.
The values listed include the attenuation of the cables, connectors,
patch panels, and reflection losses due to impedance mismatches in
the segment.
Table 2-4 Maximum Drive Distance
Cable Type Ring Speed 4 Mbit/s 16 Mbit/s
STP (Types 1 & 2)
STP (Types 6 & 9)
770 meters 346 meters
(2525 feet) (1138 feet)
513 meters 230 meters
(1683 feet) (755 feet)

REQUIREMENTS/SPECIFICATIONS
Page 2-6
NOTE: IBM Type 3 - Consists of four Unshielded Twisted Pairs of 24
AWG solid wire for data or voice communication and is typically used to
wire cable runs within the walls of buildings.
In some installations, existing UTP building wiring can be used for
token ring cabling. DO NOT connect UTP cabling to any non-token
ring network conductors (telephone, etc.) or ground. If in doubt,
test wiring before using.
WARNING: Telephone Battery and Ringing voltages, used in UTP
telephone circuits, could present a shock hazard and can damage token
ring equipment when connected to token ring cabling.
MAXIMUM CABLE LENGTH
Lobe Length is the physical length of the cable connecting a station
to its TCU port at the repeater. Table 2-6 shows the maximum lobe
length, according to ring speed for each repeater. The cable lengths
listed in the table show a total length of the cable that is made up of
a single cable type.
Table 2-5 UTP Voice Grade (IBM Type 3) Specifications
Frequency Impedance Attenuation
1 Mhz 100 Ω ± 15% <26 dB/km (8 dB/1000 ft)
4 Mhz 100 Ω ±15% <56 dB/km (16 dB/1000 ft)
10 Mhz 100Ω±15% <98 dB/km (30 dB/1000 ft)
16 Mhz 100Ω±15% <131 dB/km (40 dB/1000 ft)

REQUIREMENTS/SPECIFICATIONS
Page 2-7
Table 2-6 Maximum Lobe Length
Type 3 Media Filter
When connecting token ring devices that are not equipped with a
Type 3 Media Filter to a UTP port, a Type 3 Media Filter, such as the
Cabletron Systems TRMF or TRMF-2, must be installed in line with
the lobe cable at the connection to token ring station.
Multi-Mode Fiber Optic Network Requirements
When connecting a Fiber Optic Link Segment to TRRMIM-F2T or a
TPIM-F2, the following network requirements must be met:
•Cable Type - The cable must be one of the following multi-
mode fiber optic media:
- 50/125 µm fiber optic cabling.
- 62.5/125 µm fiber optic cabling.
- 100/140 µm fiber optic cabling.
•Attenuation - The fiber optic cable must be tested with a fiber
optic attenuation test set that is adjusted for an 850 nm
wavelength. This test verifies that the signal loss in a cable is
within an acceptable level:
Cable Type Maximum Lobe Length 4 Mbit/s 16 Mbit/s
UTP Category 3
Category 4
Category 5
150 meters 85 meters
(492 feet) (279 feet)
200 meters 100 meters
(656 feet) (328 feet)
250 meters 120 meters
(820 feet) (394 feet)