Cabletron Systems TPT User Manual

TPT

10BASE-T

TWISTED PAIR TRANSCEIVER

USER’S MANUAL

CABLETRON SYSTEMS, P.O. Box 5005, Rochester, NH 03867-5005

NOTICE

The information presented in this document, including descriptions of hardware,
firmware, and software, is subject to change without notice and should not be
construed as a commitment by Cabletron Systems. Cabletron Systems assumes no
responsibility for any errors that may appear in this manual. The reader should in
all cases contact Cabletron Systems to determine whether changes have been made
affecting the manual.
IN NO EVENT SHALL CABLETRON SYSTEMS BE HELD 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, KNEW, OR SHOULD HAVE KNOWN, THE
POSSIBILITY OF SUCH DAMAGES.
The information in this document is proprietary and is not to be copied in any form,
or by any means, without the written consent of Cabletron Systems.

© Copyright January 1992 by

Cabletron Systems Inc.
P.O. Box 5005, Rochester, NH 03867-5005

All Rights Reserved
Printed in the United States of America

Order number: 9030346-02 January 1992

LANVIEW, TPT, TPMIM, MMAC

Systems Inc.

Velcro

is a registered trademark of Velcro Industries, B.V.

, and

LAN-MD

are trademarks of Cabletron

i

FCC NOTICE

FCC NOTICE

WARNING

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 ot 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:

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

: This equipment has been tested and found to comply with the limits

• Re-orient the receiving antenna.

• Relocate the transceiver with respect to the antenna.

• Move the transceiver away from the receiver.

• Plug the Ethernet device into a different outlet so that the device and the
receiver are on different branch circuits.

ii

CONTENTS

CHAPTER 1 - INTRODUCTION

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

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

1.3 THE TPT 10BASE-T TWISTED PAIR

TRANSCEIVER..........................................1-3

CHAPTER 2 - REQUIREMENTS AND
SPECIFICATIONS

2.1 NETWORK DESIGN GUIDELINES ...........2-1

2.2 OPERATING SPECIFICATIONS...............2-5

CHAPTER 3 - INSTALLING THE TPT

3.1 UNPACKING THE TPT..............................3-1

3.2 MOUNTING THE TPT................................3-2

3.3 CONNECTING THE TPT TO THE

NETWORK.................................................3-3

3.3.1 Setting the SQE Switch .................3-3

3.3.2 Connecting to an Ethernet Dev .....3-4

iii

Contents

3.3.3 Connecting the TPT to a Twisted

Pair Segment ................................ 3-5

3.3.4 Providing Strain Relief...................3-8

CHAPTER 4 - TESTING AND TROUBLESHOOTING

4.1 INSTALLATION CHECK-OUT...................4-1

4.2 USING LANVIEW ......................................4-3

iv

CHAPTER 1

INTRODUCTION

Welcome to Cabletron Systems’ TPT™ 10BASE-T
Twisted Pair Transceiver User’s Manual. We have
designed this manual as a simple installation and reference
guide to the TPT. The TPT provides 10B ASE-T compliant
twisted pair connectivity to your Ethernet network.You
should read this manual thoroughly to fully understand the
TPT and its capabilities.

1.1 USING THIS MANUAL

Chapter 1,
10BASE-T Twisted Pair Transcei ver. This chapter shows
how to use the TPT in an Ethernet network and explains
the TPT’ s features.

Chapter 2,
network design guidelines for connecting the TPT to the
network. The chapter also contains the specifications for
the TPT.

Introduction

Requirements and Specifications, contains

, is an overview of the TPT

1-1

INTRODUCTION

Chapter 3,

Installing the TPT, contains steps for

unpacking the TPT , setting the SQE switch, connecting the
transceiver to the network, and connecting the transceiver
to an Ethernet device.

Chapter 4,

Testing and Troubleshooting,

contains
procedures for verifying that the TPT is operational. It also
describes the LANVIEW™ LEDs, and how you can use
them to troubleshoot network problems.

Before you install the TPT, you should have a general
working knowledge of Ethernet or IEEE 802.3 type data
communications networks and their physical layer
components.

1.2 GETTING HELP

If you need additional support concerning Cabletron
Systems TPT, or if you have comments, questions, or
suggestions concerning this manual, feel free to contact
Cabletron Systems’ Technical Support at:

Cabletron Systems
35 Industrial Way
P.O. Box 5005
Rochester, NH 03867-5005
Phone: [phone]

1-2

INTRODUCTION

1.3 THE TPT 10BASE-T TWISTED PAIR
TRANSCEIVER

Connections

The TPT (Fig. 1-1) is designed to connect two Ethernet
devices. Because the TPT is small, it can connect to
Ethernet devices directly, or you can connect it by means
of an AUI cable. The TPT fully conforms to IEEE 802.3
10BASE-T specifications and guarantees the flexibility to
connect to networks using IEEE 802.3 or Ethernet Version
1 or 2 equipment.

TOP VIEW

SQE Switch

AUI Port

Enable Disable

92 SERIES

TPT

802.3 10BASE-T TRANSCEIVER

WITH LANVIEW

SIDE VIEW SIDE VIEW

SQE

SN

FRONT VIEW

RJ-45 Port

LNK
COL
RCV
XMT
SQE
PWR

b

LANVIEW

LEDs

Figure 1-1 TPT

1-3

INTRODUCTION

The TPT 10B ASE-T Twisted Pair T ransceiver lets you use
existing twisted pair wiring as part of an Ethernet network.

Distance and Cable Type

The TPT supports an unshielded twisted pair (UTP)
segment, up to 100 meters (328 feet) of 24 AWG UTP with
an impedance of 85-110 ohms.

Signal Quality Error (SQE) Test

The TPT has a Signal Quality Error (SQE) Test Switch
that lets you turn on or off the SQE (“heartbeat”) test
function. With SQE Test turned on, the transceiver
generates a test signal after each packet transmission that
checks the collision circuit and path between the TPT and
the device attached to the transceiver’s AUI port.

NOTE:

You must disable the SQE test if you attach the
TPT to Version 1 equipment or to a repeater. Version 1
equipment and repeaters interpret the SQE test pulse as a
collision, which significantly slows the network response
time.

Polarity Detection and Correction

The TPT incorporates a Polarity Detection and Correction
feature. This feature lets the TPT pass data to and from the

1-4

INTRODUCTION

host, regardless of the polarity of the twisted pair
segment’s receive link. If polarity is reversed, the
LANVIEW LNK (Link) LED will flash.

NOTE:

If you have a polarity mismatch, you should
remove the segment fr om the TPT and correct the pr oblem.
This will make the segment compatible with a device that
does not have the Polarity Detection and Correction
feature.

LANVIEW LEDs

The TPT incorporates Cabletron Systems’ LANVIEW
diagnostic and monitoring system. LANVIEW gives a
visual indication of problems such as power failures,
collisions, and cable faults. LANVIEW can alert you to a
problem condition, and indicate the nature of the problem,
which streamlines troubleshooting.

Application

An Ethernet device, such as a workstation (1, Fig. 1-2)
connects to the TPT Transceiver (2) through the TPT AUI
port. An RJ-45 jack on the twisted pair segment (3)
connects to the RJ-45 port on the TPT Transceiver. The
twisted pair segment connected to the TPT can be attached
to 10BASE-T compliant products.

1-5