TRENDnet TE100-DX16 User manual

TE100-DX8
TE100-DX16
Ethernet/Fast Ethernet
Dual-Speed Stackable Hub
User’s Guide
TRENDware International, Inc.
Rev. 01 (May 1998)
6ETHFE16..01
Printed In Taiwan
RECYCLABLE

i
i
FCC Warning
This equipment has been tested and found to comply with the
regulations 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 generates,
uses, and can radiate radio frequency energy and, if not installed
and used in accordance with this user’s guide, may cause harmful
interference to radio communications. Operation of this equipment
in a residential area is likely to cause harmful interference, in
which case the user will be required to correct the interference at
his own expense.
CE Mark Warning
This is a Class A product. In a domestic environment, this product
may cause radio interference, in which case the user may be
required to take adequate measures.
VCCI A Warning

ii
i

iv
TABLE OF CONTENTS
0ABOUT THIS GUIDE.......................................................... VI
Conventions ...................................................................................vi
Overview of the User’s Guide........................................................vi
1INTRODUCTION .................................................................1
Product Description .......................................................................1
Product Features ............................................................................2
Dual-Speed Ethernet Hub Technology Overview .........................4
100BASE-TX Technology Overview ..............................................5
Introduction to 100-Mbps Fast Ethernet.............................................. 5
Cables and Connectors ..........................................................................6
Topology .................................................................................................6
Network Diameter .................................................................................7
Hub Types .............................................................................................. 7
2UNPACKING AND SETUP....................................................9
Unpacking ......................................................................................9
Identifying External Components ...............................................10
Front Panel .......................................................................................... 10
Rear Panel............................................................................................ 12
Installing the Hub........................................................................13
Installation........................................................................................... 13
Rack Mounting..................................................................................... 13
Connecting the Power Supply......................................................14

Dual-Speed Stackable Hub User’s Guide
v
3UNDERSTANDING INDICATORS .........................................15
Hub State Indicators....................................................................16
SW Enable Indicator....................................................................16
Port Speed Indicators...................................................................17
Port Status Indicators..................................................................17
4MAKING CONNECTIONS...................................................19
Creating a Stack...........................................................................19
Connectivity Rules........................................................................20
Hub-to-end-node Connections......................................................21
Uplink Connection .......................................................................23
5CABLES AND CONNECTORS.............................................27
100BASE-TX Fast Ethernet Cables and Connectors .................27
Crossover Cables ..........................................................................28
6SPECIFICATIONS.............................................................31
General..........................................................................................31
Daisy-chain Specifications ..........................................................32
LED Indicators.............................................................................32
Environmental and Physical.......................................................32

About this Guide
v
i
0 ABOUT THIS GUIDE
This guide discusses how to install and use your Ethernet/Fast
Ethernet dual-speed stackable hub.
Conventions
As used in this guide, the term hub, unless otherwise noted, refers
to the eight- or sixteen-port Ethernet/Fast Ethernet dual-speed
stackable hub with which this guide was packaged, or to another
hub in the same product family.
Overview of the User’s Guide
♦ Chapter 1, Introduction. Provides information on Fast
Ethernet networks and introduces your hub’s features.
♦ Chapter 2, Unpacking and Setup. Helps you get started in
setting up the hub.
♦ Chapter 3, Understanding Indicators. Describes all LED
indicators on the hub’s front panel. Understanding these
indicators is essential to effectively using the hub.
♦ Chapter 4, Making Connections. Provides information on
connecting to the hub’s twisted-pair ports, stacking hubs,
and uplinking hubs together.

Dual-Speed Stackable Hub User’s Guide
About this Guide vi
i
♦ Appendix A, Cables and Connectors. Provides specifications
on the cables and connectors used with the hub.
♦ Appendix B, Specifications. Lists the hub’s specifications.

Dual-Speed Stackable Hub User’s Guide
Introduction 1
1
1 INTRODUCTION
This chapter introduces your hub and gives some background
information about the technology the hub uses.
Product Description
Your Ethernet/Fast Ethernet dual-speed stackable hub is designed
to allow easy integration and migration between 10-Mbps
Ethernet and 100-Mbps Fast Ethernet.
The hub can operate with both IEEE 802.3 10BASE-T connections
(twisted-pair Ethernet operating at 10 megabits per second) and
IEEE 802.3u 100BASE-TX connections (twisted-pair Fast
Ethernet operating at 100 megabits per second). All of the twisted-
pair ports support NWay auto-negotiation, allowing the hub to
automatically detect the speed of a network connection. This
means you can connect all of your Ethernet and Fast Ethernet
hosts to your hub (or to a stack of hubs in the same product
family) without any rewiring required when a host is upgraded
from 10 Mbps to 100 Mbps.
Hubs in this family can be purchased with or without a built-in
switching circuit to allow communication between network end
nodes operating at different speeds. If your hub has a SW Enable
indicator on its front panel, it has such a switching circuit. On a

Introduction
2
hub that does not have such a switching circuit, only end nodes
operating at the same speed (10 or 100 Mbps) can communicate
with each other (unless the hub is stacked with a hub that does
have such a switching circuit—see below).
Your hub has eight or sixteen twisted-pair ports and can be
stacked together with other hubs in the same product family to a
maximum of five hubs in a stack. A stack of five sixteen-port hubs
gives a total of eighty Ethernet or Fast Ethernet ports. (Stacking
is also referred to as daisy-chaining).
As long as a stack contains at least one hub with a built-in
switching circuit, 10-Mbps Ethernet nodes will be able to
communicate with 100-Mbps Fast Ethernet nodes and vice versa,
regardless of which hub in the stack any node is attached to. Note
that if two or more hubs in a stack have switching circuits built in,
only one hub’s switching circuit will be enabled; any other
switching circuits in the stack will automatically be disabled, and
only one hub’s SW Enable indicator will shine. This is to allow
intercommunication without the danger of a signal loop forming.
Because it conforms to the standards for both Ethernet and Class
II Fast Ethernet repeaters, your hub (or a stack of hubs in the
same product family) can also be “uplinked” together with a
similarly conformant hub or hub stack to expand the network still
further. The uplink connection will carry both 10- and 100-Mbps
network signals.
Product Features
The list below highlights your hub’s features and specifications:
♦ Compatible with the IEEE 802.3 10BASE-T Ethernet and
802.3u 100BASE-TX Fast Ethernet industry standards for

Dual-Speed Stackable Hub User’s Guide
Introduction
3
interoperability with other Ethernet and Fast Ethernet
network devices.
♦ Ethernet connections support Category 3 or better twisted-
pair cables.
♦ Fast Ethernet connections support both shielded twisted-
pair and Category 5 unshielded twisted-pair cables.
♦ Fast Ethernet connections support a maximum distance of
100 meters from end-station to hub, and a total network
diameter of 205 meters.
♦ Eight or sixteen NWay ports per hub for connecting stations
to the network.
♦ Hubs with built-in switching circuitry (shown by the
presence of a SW Enable indicator on the front panel)
automatically transfer packets between Ethernet and Fast
Ethernet connections, allowing communication between end
nodes operating at different speeds.
♦ LED indicators for power, 10-Mbps collision, 100-Mbps
collision, connection speed, port status, and (on hubs with
built-in switching circuitry only) switching circuitry status.
♦ Auto-partitioning for network protection.
♦ Data collision detection and handling.
♦ Preamble regeneration and signal retiming.
♦ Daisy-chaining ports for interconnecting up to five hubs to
form one logical hub.
♦ Uplink jack for easy linking of two hubs or hub stacks (or of
a hub to a stack) to further expand the network.
♦ Optional brackets for mounting in a standard 19-inch
equipment rack.
♦ Internal auto-adjusting power supply (100 to 240V, 50 or
60HZ).

Introduction
4
Dual-Speed Ethernet Hub
Technology Overview
Dual-speed Ethernet hubs have been developed to make it simpler
to plan networks containing both 10-Mbps Ethernet and 100-Mbps
Fast Ethernet technologies, especially when network hosts are
being gradually migrated to new Fast Ethernet connections.
A dual-speed hub is actually two repeaters in one housing. The 10-
Mbps repeater receives Ethernet transmissions from any of its
ports, and retransmits them to all other ports operating at 10
Mbps. Similarly, the 100-Mbps repeater retransmits Fast
Ethernet transmissions from ports operating at 100 Mbps to all
other ports operating at the same speed.
10Mbps Repeater
100Mbps Repeater
NWay Detection
RJ-45 Ports
100Mbps
Ethernet
Station
100Mbps
Ethernet
Station
10Mbps
Ethernet
Station
10Mbps
Ethernet
Station
100Mbps
Ethernet
Station
If there is a switching circuit in the hub (or in any hub in a stack),
the switching circuit will serve as a bridge between the two
repeaters.

Dual-Speed Stackable Hub User’s Guide
Introduction
5
10Mbps Repeater
100Mbps Repeater
NWay Detection
RJ-45 Ports
100Mbps
Ethernet
Station
100Mbps
Ethernet
Station
10Mbps
Ethernet
Station
10Mbps
Ethernet
Station
100Mbps
Ethernet
Station
Switching
Circuit
100BASE-TX Technology Overview
Introduction to 100-Mbps Fast Ethernet
Computers today have become increasingly powerful, with the
capability to accommodate very sophisticated uses such as
multimedia applications, video-conferencing, and CAD/CAM. To
utilize these technologically advanced applications more
efficiently, there is also a growing demand for faster networks that
can handle heavy network traffic.
Recognizing this need for greater bandwidth and lower latency, a
variety of technologies such as FDDI, ATM, and Fast Ethernet
(100 Mbps) have been adopted by many vendors. Fast Ethernet
technology stands out as the most inexpensive and smoothest
migration path for existing 10-Mbps Ethernet users in part
because it doesn’t require a protocol translation when sharing
data with 10-Mbps Ethernet.

Introduction
6
Fast Ethernet is a relatively new standard specified by the IEEE
802.3 LAN committee. It is an extension of the 10-Mbps Ethernet
standard with the ability to transmit and receive data at 100
Mbps, while maintaining the CSMA/CD Ethernet protocol. Since
Fast Ethernet is compatible with all 10-Mbps Ethernet
environments, it provides a straightforward upgrade without
wasting the company’s existing investment in hardware, software,
and trained personnel.
Cables and Connectors
Category 5 unshielded twisted-pair (UTP) and shielded twisted-
pair (STP) cables are both supported. Category 5 UTP cables use
the same RJ-45 connector used with 10BASE-T, wired in the same
manner.
Topology
A Fast Ethernet workgroup is configured in a star topology and is
built around a maximum of two repeaters. Each workgroup forms
a separate LAN (also known as a collision domain), and these
workgroups can be easily interconnected through switches,
bridges, or routers to form one LAN large enough to encompass a
high-rise building or campus environment. Recent innovations in
LAN hub technology such as stackable hubs, coupled with the
decreasing cost of switches, bridges, and routers, allow the design
of low-cost, efficient Fast Ethernet workgroups and enterprise
LANs.
The following factors strongly influence the architecture of Fast
Ethernet networks:
• The EIA/TIA 568 Wiring Standard imposes a 100 meter
limit on horizontal runs of twisted-pair cables; that is,
connections from the wiring closet to the end-station.

Dual-Speed Stackable Hub User’s Guide
Introduction
7
• Fast Ethernet’s increased operational speed reduces the
maximum distance between all elements of the LAN (see
below).
Network Diameter
Network diameter, which is the distance between two end-stations
in the same collision domain, is the primary difference between
traditional Ethernet and Fast Ethernet. Due to the increased
speed in Fast Ethernet and adherence to the EIA/TIA 568 wiring
rules, the network diameter of a Fast Ethernet collision domain is
limited to 205 meters; in contrast, the maximum 10BASE-T
Ethernet collision domain diameter can be up to 500 meters.
Hub Types
Unlike 10BASE-T hubs, which are all functionally identical, Fast
Ethernet hubs are divided into two distinct types: Class I and
Class II. A Class I hub repeats all incoming signals on one port to
the other ports by first translating them to digital signals and
then retranslating them back to line signals. These translations
are necessary when connecting various network media to the same
collision domain, such as when combining two-wire-pair
100BASE-TX media with four-wire-pair 100BASE-T4 media. Only
one Class I hub can exist within a collision domain; thus, one hub
of this type cannot be directly uplinked to another. A Class II
repeater, on the other hand, immediately repeats all incoming line
signals on one port to the other ports; no translations are
performed. This type of hub connects identical media within the
same collision domain; for example, TX to TX. At most, two Class
II hubs can exist within the same collision domain.
As mentioned earlier, stackable Class II hubs can be used to
increase the number of available nodes in a collision domain. An
entire hub stack counts as a single repeater. Hubs in this series
are Class II devices.

Dual-Speed Stackable Hub User’s Guide
Unpacking and Setup 9
2
2 UNPACKING AND
SETUP
This chapter provides information on the unpacking and initial
installation of your hub stack.
Unpacking
Open the shipping carton of your hub and carefully unpack the
contents. The carton should contain the following items:
♦ One Ethernet/Fast Ethernet dual-speed stackable hub
♦ One AC power cord, suitable for your area’s electrical power
connections
♦ One daisy-chaining cable
♦ Four rubber feet to be used for cushioning
♦ This User’s Guide
Inspect the hub and all accompanying items. If any item is
damaged or missing, report the problem immediately to your
network equipment dealer.

Unpacking and Setup
1
0
Identifying External Components
This section identifies all the major external components of the
hub. Both the front and rear panels are shown, followed by a
description of each panel feature. The indicator panel is described
in detail in the next chapter.
Front Panel
The figure below shows the front panels of all hubs in the product
family that includes your hub. The two at the top are sixteen-port
units, the first with a built-in switching circuit and the second
without such a circuit; the two at the bottom are eight-port units,
the first with and the second without a built-in switching circuit.
Identify your own hub’s front panel in the figure before going on.

Dual-Speed Stackable Hub User’s Guide
Unpacking and Setup 11
♦ LED Indicator Panel
Refer to the next chapter, Understanding Indicators, for
detailed information about each of the hub’s LED indicators.
♦ Twisted-pair Jacks
Use these jacks to connect stations to the hub. These are MDI-
X(Medium-Dependent Interface, Cross-wired) jacks, which
means you can use ordinary straight-through twisted-pair
cables to connect user machines and servers to the hub through
them. If you need to connect another device with an MDI-X
jack, such as another hub or an Ethernet switch, you should
use a crossover cable, or make the connection using the Uplink
jack (described below). For more information about crossover
connections, see the section entitled Crossover Cables on page
28.
♦ Uplink Jack
The Uplink jack is an MDI-II jack, which means you can connect
the hub (or a hub stack) to a device with an MDI-Xport using
an ordinary straight-through cable, making a crossover cable
unnecessary.
The port 1 1X jack and the Uplink jack are really the same port,
except that their pinouts are different. Do not use both the
port 1 1X jack and the Uplink jack at the same time.

Unpacking and Setup
1
2
Rear Panel
♦ Daisy Chain IN Port
When stacking your hub with one to four other hubs in the
same series, this port should be connected to the Daisy Chain
OUT port of the previous hub in the stack (usually placed
immediately above it). A stack of five hubs can be created in
this way. The first and last hubs in the stack use only one of
the daisy-chaining ports, while the others use both.
♦ Daisy Chain OUT Port
This port works in conjunction with the Daisy Chain IN port
(see above). Connect this port to the Daisy Chain IN port of the
next hub in the stack (usually placed immediately below it),
using the enclosed daisy-chaining cable.
♦ Fan
Provides air circulation and heat dissipation.
♦ AC Power Connector
For the power cord.