Intel Express 140T User manual

722791-001
Intel®Express 140T
Standalone Hub
Quick Start and User Guide

Copyright © 1998, Intel Corporation. All rights reserved.
Intel Corporation, 5200 NE Elam Young Parkway, Hillsboro OR 97124-6497
Intel Corporation assumes no responsibility for errors or omissions in this manual. Nor does Intel make any commitment to update the
information contained herein.
* Other product and corporate names may be trademarks of other companies and are used only for explanation and
to the owners’ benefit, without intent to infringe.
First Edition September 1998 722791-001
Year 2000 Capable
An Intel product, when used in accordance with its associated documentation, is “Year 2000 Capable” when,
upon installation, it accurately stores, displays, processes, provides, and/or receives date data from, into, and
between the twentieth and twenty-first centuries, including leap year calculations, provided that all other
technology used in combination with said product properly exchanges date data with it.

1
Contents
Quick Start 2
User Guide 3
Overview ..............................................................................................3
Understanding 140T Hubs....................................................................4
Port LEDs ......................................................................................4
Hub LEDs......................................................................................5
Connecting to Devices..........................................................................6
Connection Guidelines ..................................................................6
Bridging Segments ........................................................................6
Daisy-chaining Hubs .....................................................................7
Cabling Devices....................................................................................8
Media Requirements .....................................................................8
Straight-through vs. Crossover Cables..........................................8
Testing Cables ...............................................................................8
Troubleshooting....................................................................................10
Regulatory Information ........................................................................11
Warnings ...............................................................................................12
Limited Hardware Warranty .................................................................15
Intel Customer Support................................................Inside Back Cover

2
91011 12
56
13 14
1234
i
R
1 5 10 30 40 50+
Traff
10Mbps
Power 10Mbps
Port
Activity
Port
Speed
Intel®Express 140T
Standalone Hub
9101112
9101112
123456
13 14
12345
13
Install the Hub
Connect
the Devices
Check the
Connections
• Remove the hub and parts from the box.
• Attach the enclosed brackets if you plan
to mount the hub in a rack.
• Install the Intel®Express 140T
Standalone Hub in a rack or on a shelf.
• Plug in the power cord.
• Check the port LEDs (located to the left
of the ports) to confirm the link status.A
solid LED indicates a valid link.A
blinking LED indicates port activity.
• The bottom two rows indicate port speed.
• All ports automatically detect the speed
of the device connected to them.
• Connect PCs and print servers to the hub
with straight-through cables.
• Use a crossover cable to connect a hub to
another hub or switch.
• Use a straight-through cable to connect to
another hub or switch when using the
daisy-chain port.
• Use only CAT 5 UTP to connect
100Mbps devices. To connect 10Mbps
devices, use CAT 3, 4, or 5 UTP.
Top Row – Port Activity
Solid Green = Link
Blinking = Activity
Orange = Autodisabled
Bottom Row – Port Speed
Solid Green = 100Mbps
Off = 10Mbps
i
R
100Mbps
Daisy-chain
MDI
1510
30 40 50+
1510
30 40 50+
10Mbps
Power
10Mbps 100Mbps
Collisions
or
Class
II
Port
Activity
Port
Speed
Solid green = Link
Blinking green = Activity
Orange = Autodisabled
Solid Green = 100Mbps
Off = 10Mbps
Intel
®
Express 140T
Standalone Hub
5678
1234
17 18 19 20
13 14 15 16
12345678910 11 12
13 14 15 16 17 18 19 20 21 22 23 24
12345678910 11 12
13 14 15 16 17 18 19 20 21 22 23 24
910 11 12
21 22 23 24
Traffic%
Rack: Use the four
small screws to attach
the brackets to the hub.
Shelf: Peel off the protective
backing and attach the rubber
feet to the hub.
3
1
2
10/100
10/100
10/100
10/100 10/100
Hub Hub or Switch
Hub Print Server
Hub PC/Server
straight-through
From To
Quick Start
Hub Hub or Switch
straight-through
using the hub’s daisy-chain port
crossover
not using the hub’s daisy-chain port

3
User Guide - Overview
Features
This guide covers both the 16- and 24-port versions of the Express 140T
Standalone Hub.
i
R100Mbps
Daisy-chain
MDI
1 5 10 30 40 50+1 5 10 30 40 50+ Traffic %
10Mbps
Power 10Mbps 100Mbps
Collisions
or
Port
Activity
Port
Speed
Intel®Express 140T
Standalone Hub
Solid green = Link
Blinking green = Activity
Orange = Autodisabled
Solid Green = 100Mbps
Off = 10Mbps
Class II
91011 12
5678
13 14 15 16
1234
9101112
9101112
12345678
13 14 15 16
12345678
13 14 15 16
i
R100Mbps
Daisy-chain
MDI
1 5 10 30 40 50+1 5 10 30 40 50+ Traffic %
10Mbps
Power 10Mbps 100Mbps
Collisions
or
Class II
Port
Activity
Port
Speed
Solid green = Link
Blinking green = Activity
Orange = Autodisabled
Solid Green = 100Mbps
Off = 10Mbps
Intel®Express 140T
Standalone Hub 56781234
17 18 19 2013 14 15 16
123456789101112
13 14 15 16 17 18 19 20 21 22 23 24
123456789101112
13 14 15 16 17 18 19 20 21 22 23 24
91011 12
21 22 23 24
AC LINE
100-240 VAC
50-60 Hz
1.5A MAX.
50W
• Autosensesspeed—10Mbpsor 100Mbps per port.
• Automaticallybridges10Mbps and 100Mbps segments.
• Canbe daisy-chained with another 140Thub (or any ClassII hub)to expand port
density (maximum of two hubs).
Ports
Utilization
LEDs
Port LEDs
16-port 140T Hub (Product Code EE140TX16)
24-port 140T Hub (Product Code EE140TX24)
Daisy-chain port
Fan AC
Power
Plug

4
Understanding 140T Hubs
Port LEDs
On the 140T, the port LEDs are located on a common panel with the hub
LEDs. These LEDs indicate port status, individual port speed, and port
activity.
Port
Activity
Port
Speed
Solid green = Link
Blinking green = Activity
Orange = Autodisabled
Solid Green = 100Mbps
Off = 10Mbps
9101112
9101112
12345678
13 14 15 16
12345678
13 14 15 16
LED Status Meaning
PortActivity Solid green Device linked.
Blinking green Receiving activity on that port.
Blinking orange Port auto-disabled (partitioned). See below.
Off No link detected.
Port Speed Solid green Device connected at 100Mbps
Off Device connected at 10Mbps.
Partitioned ports
A port is automatically disabled (partitioned) by the hub when an invalid
condition occurs, such as too many consecutive collisions.
Once the hub is able to transmit data to the port collision free, the hub
automatically re-enables (unpartitions) the port. Clients are usually not
affected by a partitioned port because the port is often unpartitioned very
quickly.
Usually, a partitioned port indicates an overloaded network or a
malfunctioning device (like an adapter card) on the network. To alleviate an
overloaded network, divide the network into smaller segments so that fewer
devices share the same fixed amount of bandwidth.
Top rows:
Port Activity
Bottom rows:
Port Speed

5
Hub LEDs
The 140T hub LEDs are located above and below the port LEDs. These
LEDs indicate the condition of the power supply, collisions per segment,
and the amount of traffic per segment.
i
R
100Mbps
1 5 10 30 40 50+1 5 10 30 40 50+
Traffic %
10Mbps
Power 10Mbps 100Mbps
Collisions
Port
Activity
Port
Speed
Intel
®
Express 140T
Standalone Hub
Solid green = Link
Blinking green = Activity
Orange = Autodisabled
Solid Green = 100Mbps
Off = 10Mbps
9101112
9101112
12345678
13 14 15 16
12345678
13 14 15 16
LED Status Meaning
Power On Hub is receiving power.
Off Hub is not receiving power.
Collisions 10Mbps Blinking Collisions detected on 10Mbps segment.
Collisions 100Mbps Blinking Collisions detected on 100Mbps segment.
Traffic% (1-50+) On Gives an approximation of the traffic in
the 10Mbps or 100Mbps segments.
Off No network traffic on segment.
Segment Traffic
The traffic bar graphs (located below the port LEDs) provide a quick
reference on the current traffic load relative to the total available 10Mbps or
100Mbps network bandwidth. The graphs display a measure of the
percentage of bandwidth used on the respective network segment. Typically,
a segment showing more than 30% utilization indicates an overloaded
network.
The traffic percentage is determined by counting all data packets, whether
the packets are valid or not.

6
Connection Guidelines
General
• The 140T is capable of autonegotiating port speed and can operate at
10Mbps or 100Mbps per port. The hub matches the highest possible
speed of an attached device.
• The ports on the 140T hub are half-duplex. The hub cannot connect
to a device at full-duplex.
• To prevent a loop in the network, do not connect the 140T to 10Mbps
and 100Mbps segments simultaneously if the 10Mbps and 100Mbps
segments are bridged externally (through a switch).
Cabling
• Use Category 5 unshielded twisted-pair (CAT 5 UTP) cable when
connecting 100Mbps devices to the hub.
• Use Category 3, 4, or 5 unshielded twisted-pair (CAT 3, 4, 5 UTP)
cable when connecting 10Mbps devices to the hub.
• Limit the cable length between devices to 100 meters.
• Use crossover cables or the daisy-chain port to connect to a hub
or switch.
• Use a straight-through cable to connect the hub to a server or
workstation. For more information on cabling, see pages 8-9.
Bridging Segments
A bridge allows two segments to communicate with each other. Typically, a
bridge connects segments operating at different speeds. The 140T contains
an internal bridge that automatically allows devices operating at 10Mbps to
communicate with devices operating at 100Mbps.
i
R100Mbps
Daisy-chain
MDI
1 5 10 30 40 50+1 5 10 30 40 50+ Traffic%
10Mbps
Power 10Mbps 100Mbps
Collisions
or
Port
Activity
Port
Speed
Intel®Express 140T
Standalone Hub
Solid green = Link
Blinking green = Activity
Orange = Autodisabled
Solid Green = 100Mbps
Off = 10Mbps
Class II
91011 12
5678
13 14 15 16
1234
9101112
9101112
12345678
13 14 15 16
12345678
13 14 15 16
10
Connecting to Devices
10Mbps Hub
Server
Shared
Printer
10Mbps
Clients
10 and
100Mbps
Clients
10Mbps
100Mbps

7
Daisy-chaining Hubs
Normally, to make a hub-to-hub connection you need to use a crossover
cable. The daisy-chain port on the 140T hub is wired MDI so you can use a
straight-through cable to connect the 140T to an MDI-X port on a hub or
switch. When using the daisy-chain port, follow these guidelines:
• Only two hubs (ClassII) can be daisy-chained together.
• The maximum cable length connecting the hubs can’t exceed 5 meters.
205m (max)
5m (max)100m (max) 100m (max)
i
R100Mbps
Daisy-chain
MDI
1 5 10 30 40 50+1 5 10 30 40 50+
Traffic%
10Mbps
Power 10Mbps 100Mbps
Collisions
or
Port
Activity
Port
Speed
Intel
®
Express 140T
StandaloneHub
Solidgreen = Link
Blinkinggreen = Activity
Orange= Autodisabled
SolidGreen = 100Mbps
Off= 10Mbps
Class
II
91011 12
5678
13 14 15 16
1234
9101112
9101112
12345678
13 14 15 16
12345678
13 14 15 16
i
R100Mbps
Daisy-chain
MDI
1 5 10 30 40 50+1 5 10 30 40 50+
Traffic%
10Mbps
Power 10Mbps 100Mbps
Collisions
or
Class
II
Port
Activity
Port
Speed
Solidgreen = Link
Blinkinggreen = Activity
Orange= Autodisabled
SolidGreen = 100Mbps
Off= 10Mbps
Intel
®
Express 140T
StandaloneHub 56781234
17 18 19 2013 14 15 16
123456789101112
13 14 15 16 17 18 19 20 21 22 23 24
123456789101112
13 14 15 16 17 18 19 20 21 22 23 24
91011 12
21 22 23 24
• Use a straight-through cable to connect from the daisy-chain port on
one hub to any port on the other hub (except the daisy-chain port).
• Don’t connect daisy-chain ports together with a straight-through cable.
• Never daisy-chain a 140T hub with a 100Base-T Class I device (such as
the Express 200 Series Stackable Hubs).
Intel Express 220T
Stackable Hub
Class I
12345678 1718192021222324910111213141516
Managed
Bridged
StatusRPS
Power
Colls100Mbps
Colls10Mbps
Enable/Disable
Bridging
12345678 9101112
Intel Express 220T
Stackable Hub
Class I
Left(Orange/Green)
Orange = 10Mbps
Green = 100Mbps
Solid = Link
Blink = Activity
Right(Yellow)
Solid = Disabled
Blink = Wrong Speed
Left(Orange/Green)
Orange = 10Mbps
Green = 100Mbps
Solid = Link
Blink = Activity
Right(Yellow)
Solid = Disabled
Blink = Wrong Speed
Managed
Bridged
StatusRPS
Power
Colls100Mbps
Colls10Mbps
Enable/Disable
Bridging
i
R100Mbps
Daisy-chain
MDI
1 5 10 30 40 50+1 5 10 30 40 50+ Traffic%
10Mbps
Power 10Mbps 100Mbps
Collisions
or
ClassII
Port
Activity
Port
Speed
Solidgreen= Link
Blinkinggreen= Activity
Orange=Autodisabled
SolidGreen= 100Mbps
Off=10Mbps
Intel®Express140T
StandaloneHub 56781234
17 18 19 2013 14 15 16
123456789101112
13 14 15 16 17 18 19 20 21 22 23 24
123456789101112
13 14 15 16 17 18 19 20 21 22 23 24
91011 12
21 22 23 24
Daisy-chain Port
Do not use Port 1 and the Daisy-chain port at the same time. Port 1 and
the daisy-chain port are the same logical port, except their pinouts are
different.
It is also possible to connect from a daisy-chain port on a 140T to a daisy-
chain port on another 140T. However, because the daisy-chain ports are
wired the same (MDI) you will need to use a crossover cable just as if you
were connecting two MDI-X ports together.

8
Media Requirements
Incorrect cabling is often the cause of network configuration problems.
Read the next two pages if you’re unsure of your requirements.
100Base-TX
The 100Base-TX Fast Ethernet specification requires that you use
CAT 5 UTP cabling to operate at 100Mbps. If you use lower grade cabling
(CAT 3 or CAT 4), you may get a connection, but will soon experience data
loss or slow performance. You’re limited to 100 meters between any two
devices.
10Base-T
The 10Base-T Ethernet specification allows you to use CAT 3, CAT 4, or
CAT 5 UTP cabling. You’re limited to 100 meters between any two devices.
Straight-through vs. Crossover Cables
Hub ports are wired MDI-X, so use a straight-through cable when
connecting to a workstation or server (network adapter cards are wired
MDI). For direct connection to another MDI-X port, use the daisy-chain
port or a crossover cable. Here are the pin arrangements for the hub’s
Ethernet jack and the typical RJ-45 connector.
Testing a cable
A quick way to check a cable’s link integrity is to plug one end into the
daisy-chain port, the other end of into port 2, and check the Activity LEDs
for ports 1 and 2. If the LEDs are on, you have a functioning straight-
through cable.
If the LEDs are off, remove the cable from the daisy-chain port and
reinsert it in port 1. If the Activity LEDs for ports 1 and 2 are on, you
have a functioning crossover cable.
910
12
Cabling Devices
Pin 1 Pin 8
18
Clip
Pin 8 Pin 1