Cabletron Systems TPT User manual

TPT
10BASE-T
TWISTED PAIRTRANSCEIVER
USER’S MANUAL
CABLETRON SYSTEMS, P.O. Box 5005, Rochester, NH 03867-5005

i
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 FORANY
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 , and LAN-MD are trademarks of Cabletron
Systems Inc.
Velcro is a registered trademark of Velcro Industries, B.V.

FCC NOTICE
ii
FCC NOTICE
WARNING : This equipment has been tested and found to comply with the limits
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:
• 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.
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

iii
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 - INSTALLINGTHETPT
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

Contents
iv
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

1-1
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 10BASE-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 USINGTHIS MANUAL
Chapter 1, Introduction , is an overview of the TPT
10BASE-T Twisted Pair Transceiver. This chapter shows
how to use the TPT in an Ethernet network and explains
the TPT’s features.
Chapter 2, Requirements and Specifications , contains
network design guidelines for connecting the TPT to the
network. The chapter also contains the specifications for
the TPT.

INTRODUCTION
1-2
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 theTPT 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]

INTRODUCTION
1-3
1.3 THETPT 10BASE-TTWISTED 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 EthernetVersion
1 or 2 equipment.
Figure 1-1 TPT
AUI Port LANVIEW
LEDs
FRONT VIEW
SQE
SN b
SQE
XMT
RCV
COL
LNK
PWR
Enable Disable
TPT
802.3 10BASE-T TRANSCEIVER
WITH LANVIEW
SIDE VIEW SIDE VIEW
TOP VIEW
SQE Switch RJ-45 Port
92 SERIES

INTRODUCTION
1-4
The TPT 10BASE-T Twisted Pair Transceiver 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 24AWG 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