Intel Express 210T User manual

694466-001
Intel Express
220T and 210T
Stackable Hubs
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 May 1998 694466-001
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
220T and 210T Overview .....................................................................2
Feature Comparison..............................................................................3
Understanding 220T Hubs....................................................................4
220T Port LEDs.............................................................................4
220T Hub LEDs ............................................................................5
Understanding 210T Hubs....................................................................6
210T Port LEDs.............................................................................6
210T Hub LEDs ............................................................................7
Connecting to Devices..........................................................................8
Connection Guidelines ..................................................................8
Stacking Hubs.......................................................................................9
Why Stack? ...................................................................................9
Bridging Segments ...............................................................................10
Bridging 220T Hubs......................................................................10
Bridging 210T Hubs......................................................................11
Cabling Devices....................................................................................12
Media Requirements .....................................................................12
Straight-through vs. Crossover Cables..........................................12
FrequentlyAsked Questions.................................................................14
Regulatory Information and Warnings .................................................16
Hardware Warranty...............................................................................18
Troubleshooting....................................................................................20
Intel Customer Support.........................................................................21
Contents

2
220T and 210T Overview
Features
This guide covers both the 12- and 24-port versions of the Intel®Express
220T Stackable Hub and the Express 210T Stackable Hub (formerly known
as the Express 10/100 Stackable Hub).
Input
100-120VAC/2.5A
200-240VAC/1.5A
47Hz-63Hz
Redundant Power Supply (RPS)
Colls 10Mbps
Colls 100Mbps
RPS
Power
Intel Express 220T
Stackable Hub
Bridged
Managed
Enable/Disable
Bridging
Status
Class
I
Left (Orange/Green)
Orange = 10Mbps
Green = 100Mbps
Solid = Link
Blink = Activity
Right (Yellow)
Solid = Disabled
Blink = Wrong speed
12345678 9101112
Colls 10Mbps
Colls 100Mbps
RPS
PowerBridged
Managed
Enable/Disable
Bridging
Status
Class
I
Left (Orange/Green)
Orange = 10Mbps
Green = 100Mbps
Solid = Link
Blink = Activity
Right (Yellow)
Solid = Disabled
Blink = Wrong speed
Intel Express 220T
Stackable Hub
24232219 212016 17 1810 11 12 151413876549123
10Base-T
100Base-TX Power
Intel Express 210T
Stackable Hub
Collision
Managed
Status
Class I
Left (Green)
Solid = Link
Blink = Activity
Right (Yellow)
Solid = Disabled
Blink = Wrong speed
Change Hub Speed
12345678 9101112
10Base-T
100Base-TX Power
Intel Express 210T
Stackable Hub
Collision
Managed
Status
Class I
Left (Green)
Solid = Link
Blink = Activity
Right (Yellow)
Solid = Disabled
Blink = Wrong speed
Change Hub Speed
24232219 212016 17 1810 11 12 151413876549123
Expansion
Slot
Fan AC
Power
Plug
Cascade
Connectors
Ports
RPS
Connector
(220T Hubs only)
Change Speed
Button
Port LEDs
Bridging
Button
Hub LEDs
Hub LEDs
12-port 220T Hub
24-port 220T Hub
12-port 210T Hub
24-port 210T Hub

3
Feature Comparison
Express 220T (EE220TX12) Express 220T (EE220TX24)
Colls 10Mbps
Colls 100Mbps
RPS
Power
Intel Express 220T
Stackable Hub
Bridged
Managed Enable/Disable
Bridging
Status
Class I
Left (Orange/Green)
Orange = 10Mbps
Green = 100Mbps
Solid = Link
Blink = Activity
Right (Yellow)
Solid = Disabled
Blink = Wrong speed
12345678 9101112
Colls 10Mbps
Colls 100Mbps
RPS
PowerBridged
Managed Enable/Disable
Bridging
Status
Class I
Left (Orange/Green)
Orange = 10Mbps
Green = 100Mbps
Solid = Link
Blink = Activity
Right (Yellow)
Solid = Disabled
Blink = Wrong speed
Intel Express 220T
Stackable Hub
24232219 212016 17 1810 11 12 151413876549123
• 12ports, autosensing10Mbps or • 24ports, autosensing10Mbps or
100Mbps per port 100Mbps per port
• Bridges10Mbps and100Mbps segments • Bridges10Mbps and100Mbps segments
• SupportsRedundant PowerSupply (RPS) • SupportsRedundant PowerSupply (RPS)
• Two expansionslots for optionalmodules
Express 210T (EE210TX12) Express 210T (EE210TX24)
10Base-T
100Base-TX Power
Intel Express 210T
Stackable Hub
Collision
Managed
Status
Class I
Left (Green)
Solid = Link
Blink = Activity
Right (Yellow)
Solid = Disabled
Blink = Wrong speed
Change Hub Speed
12345678 9101112
10Base-T
100Base-TX Power
Intel Express 210T
Stackable Hub
Collision
Managed
Status
Class I
Left (Green)
Solid = Link
Blink = Activity
Right (Yellow)
Solid = Disabled
Blink = Wrong speed
Change Hub Speed
24232219 212016 17 1810 11 12 151413876549123
• All 12 ports operate at same • All 24 ports operate at same
speed(10 or100Mbps) speed (10or 100Mbps)
• Two expansionslots for optionalmodules
Common Features and Optional Modules
• Stack up to eight hubs (mixed 12- or 24-port)
• Compatiblewith Express 10/100Stackable Hub
• Mix 220T, 210T, and Express 10/100 hubs in a stack
• Full-duplexsupportthrough theoptionalEthernet Module.
Change
duplex
Ethernet Module
MDI MDI-X
Auto-negotiate
Full-duplex
Half-duplex
Change
duplex
Auto-negotiate
100 Mbps
10 Mbps
Coll
or
• 100Base-FXsupport andfull-duplex supportthrough the optionalFiber Module.
Xmt Link
Rcv Coll
TX RX
Fiber Module
Change
duplex
Half-duplex
Full-duplex
• SNMP,RMON, and web-basedmanagement through theoptional Management Module.
Esc
Management
with RMON
Module
Reset

4
Understanding 220T Hubs
220T Port LEDs
The LEDs above each port provide information about the port’s
configuration and status.
LED Status Meaning
Left Solid orange Device linked at 10Mbps.
Solid green Device linked at 100Mbps.
Blinking orange Receive activity at 10Mbps.
Blinking green Receive activity at 100Mbps.
Off No link detected.
Right Solid yellow Port disabled by management (not applicable
without optional Management Module).
Blinking yellow Speed mismatch (not applicable without
optional Management Module).
Erratic blinking yellow Port auto-disabled (partitioned). See below.
Blinking yellow and Out-of-specification cabling or port hardware
Status LED blinking problem. Try a different cable.
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 sees a valid packet of data from the device or is able to
transmit data to the port, 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, segment so that fewer devices share the fixed amount
of bandwidth.
Left side:
Orange/
Green
Right side:
Yellow

5
220T Hub LEDs
The hub LEDs on the 220T indicate these conditions: collisions, status of
internal bridging, if the hub is managed, and the condition of the hub’s
power supply.
Colls 10Mbps
Colls 100Mbps
RPS
Power
Intel Express 220T
Stackable Hub
Bridged
Managed
Enable/Disable
Bridging
Status
LED Status Meaning
Colls 10Mbps Blinking Collisions detected on 10Mbps segment.
Colls 100Mbps Blinking Collisions detected on 100Mbps segment.
RPS On (green) Optional RPS is present and on standby.
Off No RPS unit present.
On (red) RPS is active; hub power supply failed.
Bridged On 10Mbps and 100Mbps segments can
communicate.
Off No communication between segments.
Managed On Hub is managed by the optional
Management Module.
Off Hub is not managed.
Status On Hub is operating normally.
Blinking Hub has an internal hardware orsoftware
problem. See descriptions for the right
port LED on page 4.
Managed and Status Blinking Hub failed to load its internal software.
Power On Hub is receiving power.
Off Hub is not receiving power.

6
Understanding 210T Hubs
210T Port LEDs
The LEDs above each port provide information about the port’s
configuration and status.
LED Status Meaning
Left Solid green Port has a link.
Blinking green Receive activity at port.
Off No link detected.
Right Solid yellow Port disabled by management (not applicable
without optional Management Module).
Blinking yellow Speed mismatch. Check that device speed
and hub speed match.
Erratic blinking yellow Port auto-disabled (partitioned). See below.
Blinking yellow and Out-of-specification cabling or port hardware
Status LED blinking problem. Try a different cable.
Partitioned ports
Aport is automatically disabled (partitioned off) by the hub when an invalid
condition occurs, such as too many consecutive collisions.
Once the hub sees a valid packet of data from the device, or is able to
transmit data to the port, 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, segment so that fewer devices share the fixed amount
of bandwidth.
Left side:
Green Right side: Yellow

7
210T Hub LEDs
The 210T hub LEDs indicate these conditions: hub speed, collisions in the
hub or stack of hubs, and whether the hub is managed.
10Base-T
100Base-TX Power
Intel Express 210T
Stackable Hub
Collision
Managed
Status
Change Hub Speed
LED Status Meaning
10Base-T On Hub is operating at 10Mbps.
100Base-TX On Hub is operating at 100Mbps.
Collision Blinking Collisions detected on hub (or stack).
LED brightens as more collisions are
detected. Continuous blinking indicates
an overloaded network.
Off No collisions detected.
Managed On Hub is managed by the optional
Management Module.
Off Hub is not managed.
Status On Hub is operating normally.
Blinking Hub has an internal hardware orsoftware
problem. See descriptions for the right
port LED on page 6.
Managed and Status Blinking Hub failed to load its internal software
Power On Hub is receiving power.
Off Hub is not receiving power.

8
Connection Guidelines
General
• Ports on the 220T and 210T hubs are half-duplex. To connect to a device
at full-duplex, you must use the optional Ethernet or Fiber Modules.
• 220T ports are autonegotiating and can operate at 10Mbps or 100Mbps.
The hub matches the highest possible speed of an attached device.
• All ports on the 210T hub operate at the same speed, either 10Mbps or
100Mbps. The ports cannot autonegotiate speed.
• If the 10Mbps and 100Mbps segments are bridged externally (through a
switch or Ethernet Module), be sure to turn off the hub’s internal bridge
before connecting any devices.
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 a crossover cable to connect the hub to a switch.
• Use a straight-through cable to connect the hub to a server or
workstation. For more information on cabling, see pages 12-13.
Daisy-chaining Hubs
• Don’t daisy-chain two hubs operating at 100Mbps with UTP cabling
(this violates the IEEE 802.3u Fast Ethernet specification for Class I
hubs). You must use Intel Cascade Cables (EE200CC).
• Hubs can be daisy-chained only if they are operating at 10Mbps.
• When connecting 10Mbps hubs, please note the following diagram.
1010 10 10
500m (max)
100m (max)
Connecting to Devices