Cabletron Systems EMC37-12 User Manual

EMC37-12

10BASE-T TO 10BASE-2

12 PORT ETHERNET MEDIA CONVERTER

USER’S GUIDE

CABLETRON SYSTEMS, P. O. Box 5005, Rochester, NH 03866-5005

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.

This electric hazard symbol appears in the EMC37-12 User’s Guide. Read
all instructions following this symbol. Failure to follow the instructions
appearing with this symbol could result in the presence of an electric
hazard which has the potential to cause injury.

© Copyright April 1995 by:
Cabletron Systems, Inc., P.O. Box 5005, Rochester, NH 03866-5005

All Rights Reserved
Printed in the United States of America

Part Number: 9031434 April 1995

LANVIEW
Windows
Ethernet
CompuServe
CHAMP

is a registered trademark of Cabletron Systems, Inc.
is a registered trademark of Microsoft Corp.
is a trademark of Xerox Corp.

is a registered trademark of CompuServe.

is a trademark of AMP, Inc.

Printed On Recycled Paper

EMC37-12 USER’S GUIDE i

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:

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:

approved by the party responsible for compliance could void the user’s authority to
operate the equipment.

This equipment has been tested and found to comply with the limits for a Class A

Changes or modifications made to this device which are not expressly

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.

This equipment is in the 1st Class Category (information equipment to be used in commercial and/or
industrial areas) and conforms to the standards set by the Voluntary Control Council for Interference
by Information Technology Equipment (VCCI) aimed at preventing radio interference in commercial
and/or industrial areas.

Consequently , when used in a residential area or in an adjacent area thereto, radio interference may be
caused to radios and TV receivers, etc.

Read the instructions for correct handling.

ii EMC37-12 USER’S GUIDE

VCCI NOTICE

CABLETRON SYSTEMS, INC.

PROGRAM LICENSE AGREEMENT

IMPORTANT

This document is an agreement between you, the end user, and Cabletron Systems, Inc. (“Cabletron”)
that sets forth your rights and obligations with respect to the Cabletron software program (the
“Program”) contained in this package. The Program may be contained in firmware, chips or other
media. BY UTILIZING THE ENCLOSED PRODUCT, YOU ARE AGREEING TO BECOME
BOUND BY THE TERMS OF THIS AGREEMENT, WHICH INCLUDES THE LICENSE AND
THE LIMITATION OF WARRANTY AND DISCLAIMER OF LIABILITY. IF YOU DO NOT
AGREE TO THE TERMS OF THIS AGREEMENT , PR OMPTLY RETURN THE UNUSED
PRODUCT TO THE PLACE OF PURCHASE FOR A FULL REFUND.

: Before utilizing this product, carefully read this License Agreement.

CABLETRON SOFTWARE PROGRAM LICENSE

1. LICENSE.
package subject to the terms and conditions of this License Agreement.

You may not copy, reproduce or transmit any part of the Program except as permitted by the
Copyright Act of the United States or as authorized in writing by Cabletron.

2. OTHER RESTRICTIONS. You may not reverse engineer, decompile, or disassemble the
Program.

3. APPLICABLE LAW. This License Agreement shall be interpreted and governed under the
laws and in the state and federal courts of New Hampshire. You accept the personal jurisdiction and
venue of the New Hampshire courts.

You have the right to use only the one (1) copy of the Program provided in this

EMC37-12 USER’S GUIDE iii

EXCLUSION OF WARRANTY AND

DISCLAIMER OF LIABILITY

1. EXCLUSION OF
Cabletron in writing, Cabletron makes no warranty, expressed or implied, concerning the
Program (including Its documentation and media).

CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED
TO YOU BY CABLETRON IN WRITING, EITHER EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF
MERCHANTABLITY AND FITNESS FOR A PARTICULAR PURPOSE, WITH
RESPECT TO THE PROGRAM, THE ACCOMPANYING WRITTEN MATERIALS,
AND ANY ACCOMPANYING HARDWARE.

2. NO LIABILITY FOR CONSEQ
CABLETRON OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES
WHATSOEVER (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF
BUSINESS, PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS
INFORMATION, SPECIAL, INCIDENTAL, CONSEQUENTIAL, OR RELIANCE
DAMAGES, OR OTHER LOSS) ARISING OUT OF THE USE OR INABILITY TO
USE THIS CABLETRON PRODUCT, EVEN IF CABLETRON HAS BEEN ADVISED
OF THE POSSIBILITY OF SUCH DAMAGES. BECAUSE SOME STATES DO NOT
ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR
CONSEQUENTIAL OR INCIDENTAL DAMAGES, OR ON THE DURATION OR
LIMITATION OF IMPLIED WARRANTEES IN SOME INSTANCES THE ABOVE
LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO YOU.

WARRANTY. Except as may be specifically provided by

UENTIAL DAMAGES. IN NO EVENT SHALL

UNITED STATES GOVERNMENT RESTRICTED RIGHTS

The enclosed product (a) was developed solely at private expense; (b) contains “restricted
computer software” submitted with restricted rights in accordance with Section 52227-19
(a) through (d) of the Commercial Computer Software - Restricted Rights Clause and its
successors, and (c) in all respects is proprietary data belonging to Cabletron and/or its
suppliers.

For Department of Defense units, the product is licensed with “Restricted Rights” as
defined in the DoD Supplement to the Federal Acquisition Regulations, Section 52.227­7013 (c) (1) (ii) and its successors, and use, duplication, disclosure by the Government is
subject to restrictions as set forth in subparagraph (c) (1) (ii) of the Rights in Technical
Data and Computer Software clause at 252.227-7013. Cabletron Systems, Inc., 35
Industrial Way, Rochester, New Hampshire 03867.

iv EMC37-12 USER’S GUIDE

TABLE OF CONTENTS

CHAPTER 1 INTRODUCTION

1.1 USING THIS MANUAL................................................................1-1

1.2 GETTING HELP..........................................................................1-2

1.3 EMC37-12 OVERVIEW...............................................................1-2

1.4 EMC37-12 FEATURES...............................................................1-3

1.5 EMC37-12 SPECIFICATIONS ....................................................1-3

CHAPTER 2 INSTALLATION

2.1 UNPACKING THE EMC37-12.....................................................2-1

2.2 INSTALLING THE EMC37-12.....................................................2-1

2.2.1 Rack Mounting the EMC37-12 .......................................2-2

2.2.2 Free-Standing Shelf or Tabletop Installation..................2-3

2.3 CONNECTING THE EMC37-12 TO THE POWER SOURCE.....2-4

CHAPTER 3 CONNECTING TO THE NETWORK

3.1 CONNECTING A TWISTED PAIR SEGMENT

TO THE EMC37-12.....................................................................3-1

3.2 CONNECTING A 10BASE-2 THIN-NET SEGMENT...................3-2

3.3 FINISHING THE INSTALLATION................................................3-3

CHAPTER 4 USING THE LANVIEW LEDS

APPENDIX A CABLE REQUIREMENTS

A.1 10BASE-T TWISTED PAIR REQUIREMENTS...........................A-1

A.2 10BASE-2 THIN-NET NETWORK REQUIREMENTS.................A-2

APPENDIX B TWISTED PAIR WIRING TABLES

B.1 TWISTED PAIR WIRING FROM AN EMC37-12 TO A

PUNCH DOWN BLOCK..............................................................B-2

B.2 TWISTED PAIR WIRING FROM A PUNCH DOWN

BLOCK TO A 10BASE-T DEVICE...............................................B-5

EMC37-12 USER’S GUIDE v

CHAPTER 1

INTRODUCTION

Welcome to the Cabletron Systems
manual provides installation instructions and specifications for the twelve
port Ethernet Media Converter (EMC).

EMC37-12 User’s Guide

. This

1.1 USING THIS MANUAL

Read through this manual to gain an understanding of the features and
capabilities of the EMC37-12. You should have a general working
knowledge of Ethernet IEEE 802.3 10BASE-T and 10BASE-2 type data
communications networks and their physical layer components when
installing the EMC37-12.

Chapter 1,
specifications.

Chapter 2,
19-inch rack or as a standalone device.

Introduction

Installation

, describes EMC37-12 features and

, describes how to install the EMC37-12 into a

Chapter 3,
segments to the EMC37-12.

Chapter 4,
EMC37-12 LEDs to monitor link and power status.

Appendix A,
requirements for the EMC37-12.

Appendix B,
twisted pair connector.

Connecting to the Network

Using the LANVIEW LEDs

Cable Requirements

T wisted Pair Wiring Tables

, explains how to connect netw ork

, describes how to use the

lists twisted pair and thin coax cable

, lists pinouts for the 50-pin

EMC37-12 USER’S GUIDE 1-1

CHAPTER 1:

INTRODUCTION

1.2 GETTING HELP

If you need additional support related to the EMC37-12, or if you have
any questions, comments, or suggestions concerning this manual, contact
Cabletron Systems Technical Support:

By phone ..........................[phone]

Monday-Friday; 8am - 8pm Eastern Time

By CompuServe...............GO CTRON from any ! prompt

By Internet mail [email protected]

1.3 EMC37-12 OVERVIEW

The EMC37-12 converts Ethernet IEEE 802.3 10BASE-T signals to
Ethernet IEEE 802.3 10BASE-2 signals. The rear panel has a 50-pin
CHAMP connector (RJ-71) that supports twelve twisted pair segments.
The front panel has twelve 10BASE-2 thin coax ports that use BNC type
connectors and RG-58 thin-net cable. Each 10BASE-2 port is equipped
with a switch to provide internal termination. Figure 1-1 shows the
EMC37-12 ports.

Each of the rear panel twisted pair ports has a corresponding thin-net port
on the front panel.

For example

: Twisted pair Port 1 converts signals to thin-net port 1,

twisted pair port 2 converts signals to thin-net port 2, etc.

Front View

EMC37-12 ETHERNET MEDIA CONVERTER WITH LANVIEW

TPLINK

XMT

PWR

RCV
POK

12 11 10 9 8 7 6 5 4 3 2 1

EMC37-12

ETHERNET MEDIA CONVERTER

12 10987654321

11

1X 12X

Rear View

TERM

1-2 EMC37-12 USER’S GUIDE

Figure 1-1. The EMC37-12

EMC37-12 FEATURES

1.4 EMC37-12 FEATURES

Automatic Transmit Port Disable

The EMC37-12 automatically disables the Transmit port when its
corresponding Receive port does not have a link.

LANVIEW Diagnostic LEDs

Cabletron equips the EMC37-12 with a visual diagnostic and monitoring
system called LANVIEW. LANVIEW LEDs help you quickly identify
Power and Link status.

Connectivity

The rear panel of the EMC37-12 has a 50-pin CHAMP connector (RJ-71)
that supports twelve twisted pair segments. The front panel has twelve
10BASE-T thin-net ports. Each thin-net port uses a BNC style receptacle
with a gold center contact.

1.5 EMC37-12 SPECIFICATIONS

This section describes operating specifications for the EMC37-12.
Cabletron Systems reserves the right to change these specifications at any
time without notice.

Physical Specifications

Dimensions: 17 L x 9.4 W x 1.7 H inches

(43.2 L x 23.9 W x 4.3 H cm)

Weight: 4 lbs (1.8 Kg)

Power Requirements

Input: 100 to 125 Vac, 1.0A

200 to 240 Vac, 0.5A
50 to 60 Hz

Environmental Requirements

Operating Temperature: +5° to +40°C (41° to 104°F)

Non-operating Temperature: -30

Operating Humidity: 5 to 95% (non-condensing)

EMC37-12 USER’S GUIDE 1-3

°

to +90°C (-22° to 194°F)

CHAPTER 1:

INTRODUCTION

Safety and Approvals

This unit meets the safety requirements of UL 1950, CSA C22.2 NO 950,
and EN 60950; the EMI requirements of FCC Class A and EN 55022
Class A, VCCI Class I; and the EMC requirements of EN 50082-1.

1-4 EMC37-12 USER’S GUIDE

CHAPTER 2

INSTALLATION

This chapter explains how to install the EMC37-12 in a 19-inch rack,
outlines requirements for installing the EMC37-12 on a tabletop or shelf
and provides procedures to connect the EMC37-12 to a power source.

2.1 UNPACKING THE EMC37-12

Unpack the EMC37-12 as follows:

1. Remove the shipping box material covering the EMC37-12.

2. Carefully remove the EMC37-12 from the shipping box.

3. Remove the EMC37-12 from its non-conductive bag. If you notice any
signs of damage, contact Cabletron Systems Technical Support
immediately.

2.2 INSTALLING THE EMC37-12

You can install the EMC37-12 in a 19-inch rack or place it on any
horizontal surface (e.g. a table or shelf). Cabletron provides an accessory
kit with the EMC37-12 that includes Rack Mount Brackets and Mounting
Screws.

The following sections provide instructions for installing the EMC37-12.
Select one of the following subsections and perform the steps that are
applicable to your installation needs.

EMC37-12 USER’S GUIDE 2-1

CHAPTER 2:

INSTALLATION

2.2.1 Rack Mounting the EMC37-12

Before installing the EMC37-12, care must be taken to ensure that the
rack used will support the unit and that the rack remains stable with the
EMC37-12 installed. In order to allow for proper cooling within the rack,
there must be a two inch clearance on either side of the unit. Refer to

Chapter 1

The following procedures explain how to install the EMC37-12 in a
19-inch rack.

1. Remove four cover screws (two from each side) located along the
front edges of each side of the EMC37-12. Figure 2-1 shows the
location of the screws.

for power and environmental requirements.

Do not remove the cover from the EMC37-12.

2. Using the four replacement cover screws provided in the accessory kit,
attach the rack mounting brackets to each side of the EMC37-12.

Rack Mounting

Brackets (2)

EMC37-12

TPLINK

XMT
RCV
POK

PWR

12 11 10 9 8 7 6 5 4 3 2 1

ETHERNET MEDIA CONVERTER

12 1098765 4321

11

Figure 2-1. Installing the Rack Mount Brackets

WITH

LANVIEW

Screws (4)

TERM

2-2 EMC37-12 USER’S GUIDE

INSTALLING THE EMC37-12

3. With the rack mounting brackets installed, position the EMC37-12

between the vertical frame members of the 19-inch rack and fasten it
securely with the mounting screws as shown in Figure 2-2.

19-Inch Rack

EMC37-12

ETHERNET MEDIA CONVERTER

TPLINK

XMT
RCV
POK

PWR

12 11 10 9 8 7 6 5 4 3 2 1

12 10987654321

11

Screws (4)

Figure 2-2. Installing the EMC37-12 in a 19-Inch Rack

WITH

LANVIEW

TERM

2.2.2 Free-Standing Shelf or Tabletop Installation

Figure 2-3 shows the surface requirements for installing the EMC37-12
on a shelf or tabletop. Shelving units must support 30 pounds of static
weight. Before installing the EMC37-12, ensure the power source and
environmental conditions meet the requirements specified in

21 IN.

18 IN.

EMC37-12

6 IN.

TPLINK

XMT
RCV
POK

PWR

12 11 10 9 8 7 6 5 4 3 2 1

ETHERNET MEDIA CONVERTER

12 10987654321

WITH

LANVIEW

11

TERM

Chapter 1

7 FT.

.

Figure 2-3. Shelf or Tabletop Installation

EMC37-12 USER’S GUIDE 2-3

CHAPTER 2:

INSTALLATION

2.3 CONNECTING THE EMC37-12 TO THE POWER

SOURCE

Note

: The EMC37-12 has a universal power supply. This allows you to
connect the EMC37-12 to power sources from 100 Vac to 125 Vac,
50-60 Hz. or 200 Vac to 240 Vac, 50-60 Hz.

To connect the EMC37-12 to the power source:

1. Plug the power cord into the back panel of the EMC37-12.

2. Plug the other end of the power cord into a grounded wall outlet.

3. Verify that the

receiving power.

PWR

LED is on, this indicates that the EMC37-12 is

2-4 EMC37-12 USER’S GUIDE

CHAPTER 3

CONNECTING TO THE NETWORK

This chapter outlines the procedure for connecting the EMC37-12 to your
network.

3.1 CONNECTING A TWISTED PAIR SEGMENT
TO THE EMC37-12

The rear panel of the EMC37-12 has a 50-pin CHAMP connector. This
section explains how to attach a twisted pair cable to the EMC37-12 and
to a 10BASE-T compliant Ethernet device that has a 50-pin CHAMP
connector (e.g., the Cabletron Systems TPRMIM or TPXMIM).

You can also run a 50-pin feeder cable from the EMC37-12 to a punch
down block. The CHAMP connector supports twelve 10BASE-T, twisted
pair segments.

Note

: Refer to

Appendix B

for information about wiring the EMC37-12 to

a punch down block.

To connect the EMC37-12 to a 10BASE-T compliant Ethernet device:

1. Attach a 50-pin feeder cable to the CHAMP connector on the

EMC37-12 as shown in Figure 3-1.

EMC37-12

Ethernet Media Converter

WITH

1X 12X

LANVIEW

EMC37-12 USER’S GUIDE 3-1

Figure 3-1. EMC37-12

CHAPTER 3:

CONNECTING TO THE NETWORK

2. Attach the other end of the 50-pin feeder cable to the CHAMP
connector on the 10BASE-T compliant Ethernet device.

3. Check that the link LED on the 10BASE-T Ethernet device and the
applicable

TPLNK

LED on the EMC37-12 are ON. If the LEDs are

OFF, perform each of the following steps until the LEDs are ON:

Note

: The link LED on the 10BASE-T Ethernet device connected to the
EMC37-12 will not be ON unless the applicable coaxial 10BASE-2 port on
the front panel of the EMC37-12 is connected to a segment.

a. Check that the 10BASE-T device and the EMC37-12 have power.

b. Verify the cabling between the EMC37-12 and the 10BASE-T

device.

c. Verify the thin-net cabling between the EMC37-12 and the

10BASE-2 device for the applicable port and ensure that both
devices have power.

d. Check the cables for continuity.

If a link is not established, contact Cabletron Systems Technical Support.

3.2 CONNECTING A 10BASE-2 THIN-NET SEGMENT

The EMC37-12 has 12 10BASE-2 ports located on the front panel. This
section explains how to connect a thin-net segment to the EMC37-12.

To connect a thin-net segment to the EMC37-12, refer to Figure 3-2 and
perform the following steps:

1. Set the Internal Termination Switch located to the right of the port to:

• The ON position if the thin-net segment connected directly to the
port will be internally terminated at the port.

• The OFF position if the thin-net segment is not terminated at the port
or is externally terminated.

2. If the Internal Termination Switch is in the ON position, connect the
thin-net segment directly to the BNC port as shown in Figure 3-2.

3-2 EMC37-12 USER’S GUIDE

FINISHING THE INSTALLATION

When internal termination switch
is set to off ( ):

Connect BNC tee-connector to port.
Attach a terminator or terminated

thin-net segment to one female
connector of tee-connector.

Connect a terminated thin-net
segment to other female connector
of tee-connector.

Attach thin-net segment directly to BNC
connector when internal termination
switch is set to on ( ).

Figure 3-2. Connecting a thin-net segment to the EMC37-12

3. If the Internal Termination Switch is in the OFF position:

a. Attach a BNC tee-connector to the BNC port on the module.

b. Attach the thin-net segment to one of the female connectors on the

tee-connector.

Note

: You must terminate each segment attached to the tee-connector. If
you do not attach a segment to one of the female connections on the tee­connector, then a terminator must be placed on that connection.

c. Attach another thin-net segment or a terminator to the other

female connector of the tee-connector.

3.3 FINISHING THE INSTALLATION

The EMC37-12 is now ready for operation. Before placing the network
into service, test the installation thoroughly, making sure that you can
address all stations and that the EMC37-12 and all stations are indicating
normal operation. Ensure that the networking software is configured
properly to match the installed network. If you encounter errors or
abnormal operation, contact Cabletron Systems Technical Support.

EMC37-12 USER’S GUIDE 3-3

CHAPTER 4

USING THE LANVIEW LEDS

This chapter describes how to use the LANVIEW Diagnostic LEDs to
monitor EMC37-12 status and diagnose problems.

EMC37-12

TPLINK

XMT
RCV

PWR

POK

12 11 10 9 8 7 6 5 4 3 2 1

Figure 4-1. LANVIEW LEDS

EMC37-12 USER’S GUIDE 4-1

CHAPTER 4: USING THE LANVIEW LEDS

Table 4-1. EMC37-12 LANVIEW LEDs

LED Color Description

PWR

(Power)

XMT

(Transmit)

RCV

(Receive)

OFF

Green

(solid)

OFF

Green
(flash)

OFF

Yellow
(flash)

Indicates that the unit is not receiving power. Check
the input power source (circuit breakers , fuse , power
cord, etc.). If the proper source is present, the prob­lem could be with the unit.

Indicates that the EMC37-12 is receiving power.

No activity.
Indicates that the unit is transmitting data packets

from the twisted pair port to the thin-net port. The
flash is pulse stretched for viewing effect and may
appear to be on solid during periods of heavy traffic.

No activity.
Indicates that the unit is receiving data packets from

the associated thin-net port and transmitting them to
the twisted pair port. The flash is pulse stretched for
viewing effect and may appear to be on solid during
periods of heavy traffic.

TPLNK

(Link)

POK

(Port OK)

OFF

Green

(solid)

OFF

Green

(solid)

No link.
Indicates an established link between the associated

twisted pair segment and the 10BASE-T device at
the other end of the segment. This LED remains on
as long as there is a link between the devices and
power is supplied to both devices.

Indicates that the segment is not properly terminated
or that the device is malfunctioning.

Indicates a properly terminated coaxial segment.

4-2 EMC37-12 USER’S GUIDE

APPENDIX A

CABLE REQUIREMENTS

This appendix provides cable requirements for each of the EMC37-12
ports.

A.1 10BASE-T TWISTED PAIR REQUIREMENTS

When you connect a 10BASE-T twisted pair segment to the EMC37-12,
the device at the other end of the twisted pair segment must meet IEEE

802.3 10BASE-T specifications. Your 10BASE-T twisted pair segment
must meet the following requirements.

Segment Length

The IEEE 802.3 10BASE-T standard requires that 10BASE-T devices
transmit to at least 100 meters (328 feet) per segment of 24-gauge
unshielded twisted pair (UTP) cable.

Insertion Loss

The maximum insertion loss allowed for a 10B ASE-T se gment is 11.5 dB
at all frequencies between 5.0 and 10.0 MHz. This includes the
attenuation of the cable, connectors, and patch panel.

Impedance

10BASE-T specifies cable impedance between 85 and 110 ohms.

EMC37-12 USER’S GUIDE A-1

APPENDIX A: CABLE REQUIREMENTS

A.2 10BASE-2 THIN-NET NETWORK REQUIREMENTS

When you connect a 10BASE-2 thin-net se gment to the EMC37-12, your
network must meet the following requirements.

Cable Type

50 ohm RG-58A/U type coaxial cable must be used when making up a
thin-net segment.

Length

The thin-net segment must be no longer then 100 meters.

Terminators

A 50 ohm terminator must be connected to the far end of each thin-net
segment.

Devices

A maximum of 10 devices may be connected to a thin-net coax segment
on the EMC37-12, and these taps must be at least 0.5 meters apart. For
special network design, contact Cabletron Systems Technical Support.

System Characteristics

Since the EMC37-12 does not retime data, the operational limits of the
EMC37-12 may be determined by individual system jitter.

Grounding

The BNC ports of the EMC37-12 are internally connected to earth
ground.

Warning: For safety, one and only one end of any thin-net
segment should be connected to earth ground. Connecting a
thin-net segment to earth ground at more than one point could
produce dangerous ground currents. The BNC ports of the
EMC37-12 are internally connected to earth ground. No
other earth ground connection of these segments is required.

A-2 EMC37-12 USER’S GUIDE

APPENDIX B

TWISTED PAIR WIRING TABLES

This appendix contains twisted pair wiring tables to assist you if you are
using a Punch Down Block (see Figure B-1) to wire your twisted pair
segments. The following tables are included in this appendix:

• T able B-1 Twisted Pair W iring from an EMC37-12 to a Punch Down
Block

• Table B-2 Twisted Pair Wiring from a Punch Down Block to a
10BASE-T Device

EMC37-12 USER’S GUIDE B-1

APPENDIX B: TWISTED PAIR WIRING TABLES

B.1 TWISTED PAIR WIRING FROM AN EMC37-12 TO A

PUNCH DOWN BLOCK

Note: Pins 25 and 50 on the CHAMP connector are not used.

Table B-1. EMC37-12 to a Punch Down Block

From
EMC37-12

Port 12

Pin Pin Pin
TX+ 48 48 Violet/Green TX+ A45 Violet/Green TX+
TX- 23 23 Green/Violet TX- A46 Green/Violet TX­RX+ 49 49 Violet/Brown RX+ A47 Violet/Brown RX+
RX- 24 24 Brown/Violet RX- A48 Brown/Violet RX-

Port 11

Pin Pin Pin
TX+ 46 46 Violet/Blue TX+ A41 Violet/Blue TX+
TX- 21 21 Blue/Violet TX- A42 Blue/Violet TX­RX+ 47 47 Violet/Orange RX+ A43 Violet/Orange RX+
RX- 22 22 Orange/Violet RX- A44 Orange/Violet RX-

Into and Out of 50 Pin
Feeder Cable

Into Punch Down Block

Port 10

Pin Pin Pin
TX+ 44 44 Yellow/Brown TX+ A37 Yellow/Brown TX+
TX- 19 19 Brown/Yellow TX- A38 Brown/Yellow TX­RX+ 45 45 Yellow/Gray RX+ A39 Yellow/Gray RX+
RX- 20 20 Gray/Yellow RX- A40 Gray/Yellow RX-

Port 9

Pin Pin Pin
TX+ 42 42 Yellow/Orange TX+ A33 Yellow/Orange TX+
TX- 17 17 Orange/Yellow TX- A34 Orange/Yellow TX­RX+ 43 43 Yellow/Green RX+ A35 Yellow/Green RX+
RX- 18 18 Green/Yellow RX- A36 Green/Yellow RX-

B-2 EMC37-12 USER’S GUIDE

TWISTED PAIR WIRING TABLES

Table B-1. EMC37-12 to a Punch Down Block (Continued)

From
EMC37-12

Port 8

Pin Pin Pin
TX+ 40 40 Black/Gray TX+ A29 Black/Gray TX+
TX- 15 15 Gray/Black TX- A30 Gray/Black TX­RX+ 41 41 Yellow/Blue RX+ A31 Yellow/Blue RX+
RX- 16 16 Blue/Yellow RX- A32 Blue/Yellow RX-

Port 7

Pin Pin Pin
TX+ 38 38 Black/Green TX+ A25 Black/Green TX+
TX- 13 13 Green/Black TX- A26 Green/Black TX­RX+ 39 39 Black/Brown RX+ A27 Black/Brown RX+
RX- 14 14 Brown/Black RX- A28 Brown/Black RX-

Into and Out of 50 Pin
Feeder Cable

Into Punch Down Block

Port 6

Pin Pin Pin
TX+ 36 36 Black/Blue TX+ A21 Black/Blue TX+
TX- 11 11 Blue/Black TX- A22 Blue/Black TX­RX+ 37 37 Black/Orange RX+ A23 Black/Orange RX+
RX- 12 12 Orange/Black RX- A24 Orange/Black RX-

Port 5

Pin Pin Pin
TX+ 34 34 Red/Brown TX+ A17 Red/Brown TX+
TX- 9 9 Brown/Red TX- A18 Brown/Red TX­RX+ 35 35 Red/Gray RX+ A19 Red/Gray RX+
RX- 10 10 Gray/Red RX- A20 Gray/Red RX-

EMC37-12 USER’S GUIDE B-3

APPENDIX B: TWISTED PAIR WIRING TABLES

Table B-1. EMC37-12 to a Punch Down Block (Continued)

From
EMC37-12

Port 4

Pin Pin Pin
TX+ 32 32 Red/Orange TX+ A13 Red/Orange TX+
TX- 7 7 Orange/Red TX- A14 Orange/Red TX­RX+ 33 33 Red/Green RX+ A15 Red/Green RX+
RX- 8 8 Green/Red RX- A16 Green/Red RX

Port 3

Pin Pin Pin
TX+ 30 30 White/Gray TX+ A9 White/Gray TX+
TX- 5 5 Gray/White TX- A10 Gray/White TX­RX+ 31 31 Red/Blue RX+ A11 Red/Blue RX+
RX- 6 6 Blue/Red RX- A12 Blue/Red RX-

Into and Out of 50 Pin
Feeder Cable

Into Punch Down Block

Port 2

Pin Pin Pin
TX+ 28 28 White/Green TX+ A5 White/Green TX+
TX- 3 3 Green/White TX- A6 Green/White TX­RX+ 29 29 White/Brown RX+ A7 White/Brown RX+
RX- 4 4 Brown/White RX- A8 Brown/White RX-

Port 1

Pin Pin Pin
TX+ 26 26 White/Blue TX+ A1 White/Blue TX+
TX- 1 1 Blue/White TX- A2 Blue/White TX­RX+ 27 27 White/Orange RX+ A3 White/Orange RX+
RX- 2 2 Orange/White RX- A4 Orange/White RX-

B-4 EMC37-12 USER’S GUIDE

TWISTED PAIR WIRING TABLES

B.2 TWISTED PAIR WIRING FROM A PUNCH DOWN

BLOCK TO A 10BASE-T DEVICE

Table B-2. Punch Down Block to a 10BASE-T Device

From Punch Down Block

Port 12 Pin Pin Pin
B45 Violet/Green RX+ 3 RX+ 3 RX+ 3 RX+
B46 Green/Violet RX- 6 RX- 6 RX- 6 RX­B47 Violet/Brown TX+ 1 TX+ 1 TX+ 1 TX+
B48 Brown/Violet TX- 2 TX- 2 TX- 2 TX-

Port 11 Pin Pin Pin
B41 Violet/Blue RX+ 3 RX+ 3 RX+ 3 RX+
B42 Blue/Violet RX- 6 RX- 6 RX- 6 RX­B43 Violet/Orange TX+ 1 TX+ 1 TX+ 1 TX+

To RJ45

Wallplate

Into

Office

Drop

Into

10BASE-T

Device

B44 Orange/Violet TX- 2 TX- 2 TX- 2 TX-

Port 10 Pin Pin Pin
B37 Yellow/Brown RX+ 3 RX+ 3 RX+ 3 RX+
B38 Brown/Yellow RX- 6 RX- 6 RX- 6 RX­B39 Yellow/Gray TX+ 1 TX+ 1 TX+ 1 TX+
B40 Gray/Yellow TX- 2 TX- 2 TX- 2 TX-

Port 9 Pin Pin Pin
B33 Yellow/Orange RX+ 3 RX+ 3 RX+ 3 RX+
B34 Orange/Yellow RX- 6 RX- 6 RX- 6 RX­B35 Yellow/Green TX+ 1 TX+ 1 TX+ 1 TX+
B36 Green/Yellow TX- 2 TX- 2 TX- 2 TX-

EMC37-12 USER’S GUIDE B-5

APPENDIX B: TWISTED PAIR WIRING TABLES

Table B-2. Punch Down Block to a 10BASE-T Device (Continued)

From Punch Down Block

Port 8 Pin Pin Pin
B29 Black/Gray RX+ 3 RX+ 3 RX+ 3 RX+
B30 Gray/Black RX- 6 RX- 6 RX- 6 RX­B31 Yellow/Blue TX+ 1 TX+ 1 TX+ 1 TX+
B32 Blue/Yellow TX- 2 TX- 2 TX- 2 TX-

Port 7 Pin Pin Pin
B25 Black/Green RX+ 3 RX+ 3 RX+ 3 RX+
B26 Green/Black RX- 6 RX- 6 RX- 6 RX­B27 Black/Brown TX+ 1 TX+ 1 TX+ 1 TX+

To RJ45

Wallplate

Into

Office

Drop

Into

10BASE-T

Device

B28 Brown/Black TX- 2 TX- 2 TX- 2 TX-

Port 6 Pin Pin Pin
B21 Black/Blue RX+ 3 RX+ 3 RX+ 3 RX+
B22 Blue/Black RX- 6 RX- 6 RX- 6 RX­B23 Black/Orange TX+ 1 TX+ 1 TX+ 1 TX+
B24 Orange/Black TX- 2 TX- 2 TX- 2 TX-

Port 5 Pin Pin Pin
B17 Red/Brown RX+ 3 RX+ 3 RX+ 3 RX+
B18 Brown/Red RX- 6 RX- 6 RX- 6 RX­B19 Red/Gray TX+ 1 TX+ 1 TX+ 1 TX+
B20 Gray/Red TX- 2 TX- 2 TX- 2 TX-

B-6 EMC37-12 USER’S GUIDE

TWISTED PAIR WIRING TABLES

Table B-2. Punch Down Block to a 10BASE-T Device (Continued)

From Punch Down Block

Port 4 Pin Pin Pin
B13 Red/Orange RX+ 3 RX+ 3 RX+ 3 RX+
B14 Orange/Red RX- 6 RX- 6 RX- 6 RX­B15 Red/Green TX+ 1 TX+ 1 TX+ 1 TX­B16 Green/Red TX- 2 TX- 2 TX- 2 TX-

Port 3 Pin Pin Pin
B9 White/Gray RX+ 3 RX+ 3 RX+ 3 RX+
B10 Gray/White RX- 6 RX- 6 RX- 6 RX­B11 Red/Blue TX+ 11 TX+ 1 TX+ 1 TX+

To RJ45

Wallplate

Into

Office

Drop

Into

10BASE-T

Device

B12 Blue/Red TX- 2 TX- 2 TX- 2 TX-

Port 2 Pin Pin Pin
B5 White/Green RX+ 3 RX+ 3 RX+ 3 RX+
B6 Green/White RX- 6 RX- 6 RX- 6 RX­B7 White/Brown TX+ 1 TX+ 1 TX+ 1 TX+
B8 Brown/White TX- 2 TX- 2 TX- 2 TX-

Port 1 Pin Pin Pin
B1 White/Blue RX+ 3 RX+ 3 RX+ 3 RX+
B2 Blue/White RX- 6 RX- 6 RX- 6 RX­B3 White/Orange TX+ 1 TX+ 1 TX+ 1 TX+
B4 Orange/White TX- 2 TX- 2 TX- 2 TX-

EMC37-12 USER’S GUIDE B-7

APPENDIX B: TWISTED PAIR WIRING TABLES

A B C D

1
2
3

4
5

6
7
8

9
10

11
12
13

14
15

16
17
18

19
20

21
22
23

24
25
26

27
28

29
30
31

32
33

34
35
36

37
38

39
40
41

42
43

44
45
46

47
48

49
50

Figure B-1. Punch Down Block Pinout

B-8 EMC37-12 USER’S GUIDE

POWER SUPPLY CORD

The mains cord used with this equipment must be a 2 conductor plus
ground type with minimum 0.75 mm square conductors and must
incorporate a standard IEC appliance coupler on one end and a mains plug
on the other end which is suitable for the use and application of the product
and that is approved for use in the country of application.

GERMAN:

Die Netzleitung, die mit diesem Geraet benuetzt wird, soll einen zwei
Leiter mit Erdleiter haben, wobei die Leiter mindestens 0.75 mm sind, mit
einer normalen IEC Geraetesteckdose an einem Ende und einem
Geraetestecker am anderen Ende versehen sind, der fuer den Gebrauch und
die Anwendung des Geraetes geeignet und der zum Benuetzen im Lande
der Anwendung anerkannt ist.

SPANISH:

El cable principal de la red eléctrica utilizado con este equipo debe tener 2
conductores y 1 toma de tierra con un mínimo de 0.75 mm2 cada uno y
necesita tener un aparato de acoplamiento standard IEC en un extremo y
un enchufe para el cable principal de la red eléctrica en el otro extremo, lo
cual sea adecuado para el uso y
applicación del producto y lo cual sea aprobado para uso en el pais de
applicación.

FRENCH:

Le cordon d' alimentation reliant cet appareil au secteur doit
obligatoirement avoir deux fils conducteurs de 0.75 mm2 minimum et un
fil de terre. It doit également être équipé du côté appareil d'une fiche agrée
IEC et du côte secteur, d'une prise adaptée à l'usage du produit et aux
normes du pays où l'appareil est utilisé.