Cabletron Systems TRFOT-3 User manual

TRFOT-3
TOKEN RING SINGLE MODE
FIBER OPTIC TRANSCEIVER
LOBE CABLE CONVERTER
USER’S GUIDE
CABLETRON SYSTEMS, P. O. Box 5005, Rochester, NH 03867-0505
The Complete Networking Solution™

NOTICE
i
NOTICE
CabletronSystemsreservestherighttomakechangesinspecifications
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 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: 9030942 October 93
TRFOT-3 , TRRMIM-A , TRRMIM-2A , TRRMIM-4A , TRMM ,
TRFMIM-32 , TRFMIM-36 , and TRFMIM-38 are trademarks of
Cabletron Systems, Inc.
LANVIEW is a registered trademark of Cabletron Systems, Inc.
CompuServe is a registered trademark of CompuServe.

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
limitsfor a ClassA digital device,pursuant to Part15 of theFCC 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
Thisdigitalapparatusdoesnotexceedthe ClassAlimitsforradio 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
TABLE OF CONTENTS
CHAPTER 1 INTRODUCTION
1.1 USING THIS MANUAL............................................................1-1
1.2 TRFOT-3 OVERVIEW...............................................................1-1
1.3 TRFOT-3 FEATURES ...............................................................1-2
1.4 RECOMMENDED READING...................................................1-2
1.5 GETTING HELP........................................................................1-2
CHAPTER 2 INSTALLATION
REQUIREMENTS/SPECIFICATIONS
2.1 FIBER OPTIC CABLE SPECIFICATIONS.............................2-1
2.2 COPPER CABLE SPECIFICATIONS......................................2-2
2.3 OPERATING SPECIFICATIONS.............................................2-3
CHAPTER 3 INSTALLING THE TRFOT-3
3.1 UNPACKING THE TRFOT-3 ...................................................3-1
3.2 SETTING THE CONFIGURATION SWITCHES....................3-1
3.3 ATTACHING THE TOKEN RING CABLE TO A
CONCENTRATOR.....................................................................3-3
3.4 ATTACHING FIBER OPTIC CABLES ....................................3-3
3.5 CONNECTING POWER............................................................3-5
3.6 MOUNTING THE TRFOT-3.....................................................3-6
3.7 USING LANVIEW LEDS..........................................................3-7

INTRODUCTION
Page 1-1
CHAPTER 1
INTRODUCTION
Welcome to the Cabletron Systems TRFOT-3 Token Ring Single
Mode Fiber Optic Transceiver Lobe Cable Converter User’s
Guide .This manual explains installation instructions and provides
reference information for the TRFOT-3
1.1 USING THIS MANUAL
Read through this manual to gain a full understanding of the features
of the TRFOT-3. A general working knowledge of token ring
(IEEE 802.5J) networks will be helpful during the installation.
Chapter 1, Introduction , describes the features and capabilities of
the Cabletron Systems TRFOT-3.
Chapter 2, Installation Requirements/Specifications , describes
cabling requirements, network guidelines, and operating
specifications for the TRFOT-3.
Chapter 3,
Installing the TRFOT-3 , contains instructions for
mounting the TRFOT-3 and attaching the cables to your network. It
also describes the front panel LANVIEW®LEDs.
1.2 TRFOT-3 OVERVIEW
The TRFOT-3, Token Ring Single Mode Fiber Optic Transceiver,
converts single mode fiber lobes to copper and/or copper lobes to single
mode fiber. You can use the TRFOT-3 in conjunction with Cabletron
Systems’ TRFMIM-32/36/38 Single Mode Fiber Media Interface
Modules or configure the TRFOT-3 for Ring In/Ring Out (RI/RO)
applications. An external plug-in power supply provides power for the
TRFOT-3.The TRFOT-3 complies with 802.5J Fiber Optic Token Ring
standard (draft 23) over single mode fiber cable and meets FCC Class
A, UL and VDE requirement for emissions.

INTRODUCTION
Page 1-2
1.3 TRFOT-3 FEATURES
LANVIEW LEDs
Cabletron Systems’ LANVIEW Status Monitoring and Diagnostics
System is a convenient troubleshooting tool that helps you diagnose
physical layer problems.The front panel LANVIEW LEDs alert you to
power failures, cable faults, and link problems.
Connectivity
The TRFOT-3 is equipped with single mode ST connectors for fiber
links and a DB9 connector for copper links. The TRFOT-3 supports
cable distances of up to 10 km over single mode fiber optic cable.You
can attach the TRFOT-3 at either end of a fiber link.
Ring Speed Compatibility
The TRFOT-3 supports both 4 and 16 mb/sec ring speeds and senses
the ring speed automatically.
1.4 RECOMMENDED READING
We recommend the following publications for more information 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
TRFOT-3, or if you have any questions, comments, or suggestions
concerning this manual, feel free to contact Cabletron Systems
Technical Support:
By phone......................... [phone]
Monday-Friday; 8am - 8pm EST
By CompuServe
®
............ GO CTRON from any ! prompt
By Internet mail............. [email protected]

INSTALLATION REQUIREMENTS/SPECIFICATIONS
Page 2-1
CHAPTER 2
INSTALLATION
REQUIREMENTS/SPECIFICATIONS
This chapter describes cabling requirements, network guidelines, and
operating specifications for the TRFOT-3. Ensure that you read this
chapter before you install the TRFOT-3. Failure to follow these
guidelines could result in unsatisfactory network performance.
2.1 FIBER OPTIC CABLE SPECIFICATIONS
Single mode fiber optic link segments must meet the requirements
listed below:
Attenuation
The fiber optic cable must be tested with a fiber optic attenuation test
set that is adjusted for a 1300 nm wavelength. This test verifies that
the signal loss in a cable is within an acceptable level of 10.0 dB or less
for any given fiber optic cable segment.
Fiber Optic Budget and Propagation Delay
Fiber optic budget is the combination of the optical loss due to the
fiber optic cable, in-line splices, and fiber optic connectors.
Propagation delay is the amount of time it takes data to travel from
the sending device to the receiving device.When determining the
maximum fiber optic cable length, the fiber optic budget (total loss of
10.0 dB or less between stations) and total network propagation delay
should be calculated and considered before fiber optic cable runs are
incorporated in any network design.
Table 2-1. Single Mode Fiber Optic Cable Requirements
Cable Type Single Mode 8.3/125 µ m fiber optic
Wavelength 1300 nm Typical
1270 nm Minimum
1330 nm Maximum
Maximum Cable Length 10 km
Fiber Optic Budget Loss 10 db

INSTALLATION REQUIREMENTS/SPECIFICATIONS
Page 2-2
2.2 COPPER CABLE SPECIFICATIONS
Cabletron includes a DB9 to DB9 ShieldedTwisted Pair cable with the
TRFOT-3. Use this cable to connect the TRFOT-3 to the token ring
station adapter card or concentrator.To attach theTRFOT-3 to a token
ring device that does not have a DB9 connector, you need an adapter
cable. Cabletron offers adapter cables for RJ45 or MIC style
connectors. Copper cable must meet the following requirements:
Maximum Cable Length
The maximum allowable length for copper cable is 10 feet.
Connector Pinouts
Table 2-2 provides a cross reference of copper cable connector pinouts.
Media Filters
To connect an Unshielded Twisted Pair (UTP) segment from a token
ring concentrator to the TRFOT-3, you need to install a Type 3 media
filter such as the Cabletron Systems TRMF-2. Use the TRMF-2 at the
concentrator end of the connection as shown in Figure 2-1.
Figure 2-1. UTP Cable Connections
Table 2-2. Connector pinout Cross reference
Signal
Name DB9 9-pin D-shell RJ45 8-pin Modular Data Connector (MIC)
TX+ 9 6 O (Orange)
TX- 5 3 B (Black)
RX+ 1 4 R (Red)
RX- 6 5 G (Green)
DB9 STP Cable TRFOT-3 TRFOT-3
PC
Single Mode Fiber Cable
TRMF-2 Media Filter
UTP Cable
Concentrator

INSTALLATION REQUIREMENTS/SPECIFICATIONS
Page 2-3
2.3 OPERATING SPECIFICATIONS
This section lists power supply requirements, safety and
environmental guidelines, and physical specifications for the
TRFOT-3. Cabletron Systems reserves the right to change these
specifications at any time without notice.
POWER REQUIREMENTS
Input Voltage: 9-12 VDC
Input Current: 700 ma, Maximum
FIBER OPTIC TRANSMIT/RECEIVE SPECIFICATIONS
Transmit Power: -15.1 dBm
Receive Sensitivity: -32 dBm
Maximum Receive Power: -6.99 dBm
SAFETY AND ENVIRONMENTAL APPROVALS
This device meets FCC Class A, UL and VDE requirement for
emissions.
PHYSICAL
Dimensions: 2.875 H x 5.250 W x .875 D inches
(7.18 H x 13.12 W x 2.18 D centimeters)
Weight: .40 lbs

INSTALLING THE TRFOT-3
Page 3-1
CHAPTER 3
INSTALLING THE TRFOT-3
This chapter outlines how to install the TRFOT-3 to your network.
Ensure that your network meets all the requirements listed in
Chapter 2, Installation Requirements/Specifications , before
installing and operating the TRFOT-3.
3.1 UNPACKING THE TRFOT-3
Unpack the TRFOT-3 as follows:
1. Carefully remove the TRFOT-3 from the shipping box.
2. Remove the TRFOT-3 from its protective plastic bag.
3. Visually inspect the TRFOT-3. If there are any signs of damage,
contact Cabletron Systems Technical Support immediately.
3.2 SETTING THE CONFIGURATION SWITCHES
Figure 3-1 shows the location of the TRFOT-3’s four configuration
switches. Cabletron sets the switches for Station applications. If you
need to change the switches for other applications, follow steps 1-3.
Figure 3-1. TRFOT-3 Configuration Switches
1. Disconnect the TRFOT-3 from the network and remove the power.
2. Set the switches for the desired application (refer to Table 3-1).
3. Reconnect the TRFOT-3 to the network, then re-apply the power.
A B C D
ON
OFF