HP AdvanceStack J2610B Installation And Reference Manual

HP AdvanceStack 10Base-T Hub-8U

Installation and Reference Guide

© Copyright Hewlett-Packard Company 1997.
All Rights Reserved.

Reproduction, adaptation, or translation without prior
written permission is prohibited, except as allowed under
the copyright laws.

Publication Number

J2610-90201
Edition 1
July 1997

Applicable Product

HP J2610B

Trademark Credits

MS-DOS® and Microsoft® are U.S. registered trademarks
of Microsoft Corporation. Ethernet is a registered trade­mark of Xerox Corporation.

Disclaimer

The information contained in this document is subject to
change without notice.

HEWLETT-PACKARD COMPANY MAKES NO WARRANTY
OF ANY KIND WITH REGARD TO THIS MATERIAL,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE. Hewlett-Packard shall
not be liable for errors contained herein or for incidental
or consequential damages in connection with the furnishing,
performance, or use of this material.

Hewlett-Packard assumes no responsibility for the use or
reliability of its software on equipment that is not furnished
by Hewlett-Packard.

Warranty

See the warranty booklet included with the product.

A copy of the specific warranty terms applicable to your
Hewlett-Packard product and replacement parts can be ob­tained from your HP Sales and Service Office or authorized
dealer.

8000 Foothills Boulevard MS 5551
Roseville, California 95747-5551
http://www.hp.com/go/network_city

HP AdvanceStack Hub-8U

At A Glance

The HP J2610B AdvanceStack Hub-8U is a multiport repeater with eight
twisted-pair network ports. With this hub, you can connect computers and
other devices together in an unshielded twisted-pair cable network. This hub
is compliant with the IEEE 802.3 Type 10Base-T standard and supports both

802.3 and Ethernet networks.

iii

Front of the Hub

AUI/Xcvr port
LED

Hub status LEDs

Back of the Hub

cover plate over slot for HP AUI
and Transceiver Modules

twisted-pair
port LEDs

Twisted-pair ports

cover plate over expansion slot for
HP AdvanceStack 8U/16U SNMP
Module

MDI/MDI-X switch
for port 1

DC power
receptacle

iv

Features

Network Connections

Upgradeable Design, with
Management Options

Eight RJ-45 (twisted-pair) ports to connect to end nodes or other devices.
A Media Dependent Interface (MDI) switch for Port 1 which allows you to

connect either an end node (MDI-X position) or to cascade a hub (MDI position)
to the port, using a “straight-through” twisted-pair cable in both cases.

A management slot in the back of the hub enables you to install an optional HP
AdvanceStack 8U/16U SNMP Module. With the module, you can configure,
monitor, and troubleshoot the hub using either of the following options:
+ Serially connect an ASCII console to the hub.
+ Use HP AdvanceStack Assistant (HP ASA) to monitor traffic and manage
the hub from a PC running ASA on the network. HP ASA (formerly HP
Interconnect Manager) is included at no extra cost with the 8U/16U SNMP
Module. HP ASA works over the network through either a twisted-pair cable
connected to any UTP port, or a fiber or ThinLAN cable connected to an
optional ThinLAN or fiber-optic transceiver installed in the back of the hub.

An AUI/Xcvr Slot in the back of the hub for several types of transceiver modules
including ThinLAN, AUI, twisted-pair, and fiber-optic. With the optional ThinLAN
transceiver, you can “hot-swap” a hub. Hot-swap means that removing a hub
connected to other hubs through the ThinLAN transceiver does not bring down
the network; you can upgrade or replace hubs in a stack with the network up
and running. The AUI Port Module with an external transceiver allows you to
connect to an Ethernet/IEEE 802.3 LAN. The twisted-pair module adds a ninth
RJ-45 port for a total of nine twisted-pair ports on the hub. The fiber-optic
module allows you to connect your hub to a fiber-optic backbone.

Modular, Easy-to-Use Design

Standards-Based Compatibility

LEDs showing power, activity, collisions, and port status provide quick, easy-to­read hub status information and troubleshooting assistance.

A small footprint that allows you to install the hub in a variety of ways, including
on a desk, under a desk, or on a wall.

Compatible with the IEEE 802.3 Type 10Base-T standard to support both 802.3
and Ethernet networks.

v

0_hperf%.fm5 Page 3 Tuesday, July 22, 1997 4:54 PM

HP Customer Support Services

How to get the latest software/agent firmware

You can download from the World Wide Web, HP FTP Library Service, CompuServe,
and HP BBS a compressed file (
Management Module firmware. After you download the file,

filename

World Wide Web

Select the “Support” section.
From this web site, you can also download information on the HP networking

products. If you have a growing network, download the D

Networks Guide

and pressing

http://www.hp.com/go/network_city

[Enter]

. For example,

or call 1-800-752-0900 in the U.S. to receive a copy through the mail.

j3133a.exe

j3133a [Enter].

) containing the latest version of the HP

extract

esigning HP AdvanceStack

the file by typing

HP FTP Library Service

1. FTP to Internet IP Address —

2. Log in as

3. Enter

4. Enter

5. Enter

CompuServe

1. Login to CompuServe.

2. Go to the “hp” service.

3. Select “HP Systems, Disks, Tapes, etc.”

4. Select “Networking Products” library.

Download

5.

HP BBS

Set your modem to no parity, eight bits, 1 stop bit, set speed up to 14400 bps, and with
your telecommunication program (e.g., Windows Terminal) dial [phone] in the
U.S. to get the latest software for your HP networking product. For other countries,
see http://www.hp.com/cposupport/eschome.html.

anonymous

bin

to set the transfer type.

cd /pub/networking/software

filename

get

filename

and press

to transfer the file to your computer, then quit.

and then quit.

ftp ftp.hp.com

[Enter]

at the password prompt.

.

.

(over for more services)

✂

Obtain the latest Module firmware (j3133a.exe) from

World Wide Web: http://www.hp.com/go/network_city
HP FTP Library

Service:
HP BBS: [phone]

(over)

ftp ftp.hp.com

0_hperf%.fm5 Page 4 Tuesday, July 22, 1997 4:54 PM

HP FIRST Fax Retrieval Service

HP FIRST is an automated fax retrieval service that is available 24 hours a day, seven
days a week. HP FIRST provides information on the following topics:

■

Product information

■

Troubleshooting instructions

■

Technical reviews and articles

■ Configuration information

To access HP FIRST, dial one of the following phone numbers:

Location Phone Number

U.S. and Canada Only Dial 1 [phone] with your fax machine or touch-tone phone

and press 1.
Outside the U.S. and Canada Dial 1 [phone] from your fax machine and press 9.
To receive a list of currently available documents, enter document number 19941. The information

you requested will be sent to you by return fax. For other countries, see http://www.hp.com/
cposupport/eschome.html.

Additional HP Support Services

In addition to the above services, you can purchase various HP telephone support
services which provide you expert HP technical assistance:

■

Network Phone-In Support provides you support at an hourly rate. In the U.S.,
call 1-800-790-5544. In other countries, please contact your local HP Response
Center to see if this service is available in your country.

■ HP SupportPack LAN Support provides problem resolution for small to

medium local area networks. Contact your HP Authorized Reseller or the
nearest HP Sales and Support Office for more information.

■

HP SupportPack Comprehensive Network Support provides complete prob­lem resolution for medium to large interconnected local and wide area
networks. Contact your HP Authorized Reseller or the nearest HP Sales and
Support Office for more information.

HP offers other hardware support services. Please contact your reseller for more
information.

✂

CompuServe: Go hpsys

Lib 7.
Download j3133a.exe

Network Phone-In
Support (hourly):

1-800-790-5544

Table of Contents

1 Installing the Hub

Installation Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Included Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

1. Install add-in modules

2. Verify the hub’s operation . . . . . . . . . . . . . . . . . . . . . 1-5

3. Mount the hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Equipment Required . . . . . . . . . . . . . . . . . . . . . . . 1-6

Mounting Precautions . . . . . . . . . . . . . . . . . . . . . . 1-7

Marking the Location . . . . . . . . . . . . . . . . . . . . . . . 1-7

Mounting the Hub . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

4. Complete the network connections to the hub . . . . . . . . . 1-9

Connecting Devices to the Hub . . . . . . . . . . . . . . . . . 1-9

Connecting Hubs Together . . . . . . . . . . . . . . . . . . . . 1-10

Twisted-Pair Cascade Connections . . . . . . . . . . . . . . . 1-10

ThinLAN Connections . . . . . . . . . . . . . . . . . . . . . . 1-11

Connecting Hubs to Network Backbones . . . . . . . . . . . 1-12

Connecting the Hub 8U to a ThinLAN Backbone . . . . . . . 1-12

Connecting the Hub 8U to a Fiber-Optic Backbone . . . . . . 1-13

5. Connect the hub to an ASCII console

(optional)

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

(optional)

. . . . . . . . 1-14

2 Troubleshooting

Troubleshooting Approaches . . . . . . . . . . . . . . . . . . . . . . 2-2

Diagnosing with the LEDs . . . . . . . . . . . . . . . . . . . . . . . . 2-3

LED Pattern During Self-Test . . . . . . . . . . . . . . . . . . 2-3

LED Error Indications . . . . . . . . . . . . . . . . . . . . . . 2-4

Installation Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Incorrect Hardware Installation . . . . . . . . . . . . . . . . . 2-6

Cabling Problems . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Non-standard Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Unusual Network Activity . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Diagnostic Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Testing the Hub Only . . . . . . . . . . . . . . . . . . . . . . . 2-8

Testing Twisted-Pair Cabling . . . . . . . . . . . . . . . . . . . 2-8

vii

Testing End-to-End Network Communications . . . . . . . . 2-9

Replacement Instructions . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Customer Support Services . . . . . . . . . . . . . . . . . . . . . . . 2-11

3 Hub Reference

Front of the Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Hub status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Port status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Back of the hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Management Slot . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

AUI/Xcvr Slot . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Hub Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Collision Detection . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Auto-Partitioning . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Link Beat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

A Cables and Connectors

Recommended Cables . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Twisted-Pair Cable/Connector Pin-Outs . . . . . . . . . . . . . . . . A-3

Twisted-Pair Cable for Hub-to-Computer Network Connection . A-3

Twisted-Pair Cable Pin Assignments . . . . . . . . . . . . . . . . . A-4

Twisted-Pair Straight-Through Cable . . . . . . . . . . . . . . A-4

ThinLAN Cable Requirements . . . . . . . . . . . . . . . . . . . . . . A-4

B Specifications

Safety and Regulatory Statements

Index

viii

1

Installation Summary

1. Install Add-in Modules

2. Verify the Hub’s Operation

3. Mount the Hub

4. Complete the Network Connections to the Hub

5. Connect the Hub to an ASCII Console

(optional)

(optional)

Installing the Hub

Installing the Hub

This chapter describes how to install the HP AdvanceStack Hub-8U, verify
its operation, and connect it to a network, other hubs, computers, and/or
other devices.

Installation Summary

Installing the Hub

The basic hardware installation procedure for the HP AdvanceStack Hub-8U
is as follows:

1. Install the optional HP AdvanceStack 8U/16U SNMP Module and/or
one of the optional HP Transceiver Modules.

2. Verify the hub’s operation.

3. Mount the hub on a wall or under a tabletop.

4. Connect the hub to a network or other hubs, and connect
computer(s) and/or other device(s) to the hub’s ports.

5. (Optional) Connect the hub to the AdvanceStack 8U/16U SNMP
management console.

Included Parts

Each HP AdvanceStack Hub-8U has the following components shipped with
it:

HP AdvanceStack Hub-8U Installation and Reference Guide—this
manual (J2610-90101)

An ac power cord, one of the following:

Australia/New Zealand
Denmark
Europe
Japan
Switzerland
United Kingdom/Hong Kong
U.S./Canada

A power supply, part number 0950-3058

(8120-1369)
(8120-2956)
(8120-1689)
(8120-4753)
(8120-2104)
(8120-1351)
(8120-1378)

1-2

Installing the Hub

1. Install add-in modules (optional)

The HP AdvanceStack Hub-8U can be custom-configured by installing the
optional HP AdvanceStack 8U/16U SNMP Module and/or an HP Transceiver
Module. If you intend to install any of these optional modules, refer to the
documentation that was shipped with it.

It may be more convenient to install these optional modules before installing
the hub under a desk or other location. Inspect your installation site and
identify whether the hub’s module slots will be accessible.

The HP J3133A AdvanceStack 8U/16U SNMP Module enables you to connect
a PC to the hub to configure, monitor, and troubleshoot the hub.

Installing the Hub

Caution To avoid possible damage to module or transceiver circuitry,

disconnect the power cable from the hub before installing (or
removing) the optional SNMP Module or a transceiver.

1-3

Installing the Hub

The HP Transceiver Modules provide extended connectivity choices from
the hub to Ethernet networks.

Installing the Hub

The following optional transceiver modules provide these additional
connectivity options:

HP J2608A ThinLAN Transceiver Module
for 10Base-2 networks

HP J2606A Fiber-Optic Transceiver Module for
10Base-FL networks

HP J2607A Twisted-Pair Transceiver Module for
10Base-T networks

HP J2609A AUI Port Module for connecting a
standard IEEE 802.3 external transceiver to the hub

The HP AdvanceStack 8U/16U SNMP Module and HP Transceiver Modules
and their cabling configurations are described in their accompanying
documentation.

1-4

Installing the Hub

Note

2. Verify the hub’s operation

Your hub uses power from an ac adapter.

If your installation requires a different power cord than the one supplied
with the hub, contact your HP-authorized LAN dealer or your local HP
sales office.

The hub does not have a power switch; it is powered on when the power
cord is plugged in.

To provide power to the hub, follow these steps:

Plug the power supply into the receptacle on the hub marked

1.

“Power”.

Plug the ac power cord into an ac power source.

2.
the Hub-8U, note that the ac outlet must be installed near the equipment
and should be easily accessible.

When installing

Installing the Hub

Example of an ac power cord
for a U.S. outlet. Plug the ac
power cord provided with your
hub into an ac power source.

power supply

Power receptacle
on the back of the
hub.

1-5

Installing the Hub

3. Check the LEDs on the hub’s front panel.
When the hub is powered on, it performs a self-diagnostic test.

During the test, all LEDs are lit for a short time.
When the self-test completes successfully, the following events occur:

• the Power LED stays on

• the twisted-pair Port LEDs enter their normal operating state

Installing the Hub

• If an HP Transceiver module is installed, the AUI/Xcvr LED

stays lit

A Port LED stays on if link beat has been detected at the port. A Port
LED turns off if link beat is not detected. If you have an optional HP
AdvanceStack 8U/16U SNMP Module installed, the Port LEDs have
additional meanings. See the documentation accompanying the
module for more information. If all of the Port LEDs stay on and you
have not connected end nodes to these ports, the hub has failed its
self-test. See chapter 2, “Troubleshooting” for information about
diagnosing your hub.

4. After the hub has passed its self-test, you are ready to mount

the hub. Before mounting the hub, unplug it.

3. Mount the hub

The HP AdvanceStack Hub-8U can be placed on a desk or mounted on any
vertical or horizontal surface, for example, a wall or under a desk.

To locate the hub on a table or other horizontal surface, no special tools are
necessary. Be certain to pick a sturdy table in an uncluttered area. You may
want to secure the hub’s cables to the leg of the table to prevent people from
tripping over them.

Equipment Required

To mount the hub on a wall or under a desk, you will need the following
equipment:

two number 6 by half-inch or M3 x 12 mm pan head wood screws
(not included with the hub)
a Phillips (cross-head) screwdriver (not included with the hub)

1-6

Installing the Hub

Mounting Precautions

Before mounting the hub, follow these mounting precautions:

Plan the hub’s location and orientation relative to other devices and
equipment. Also consider the cabling that will be attached to the hub
and ports that will be used. In the front of the hub, leave 3 inches
(76 mm) of space for twisted-pair cables. In the back of the hub,
leave 3 inches (7 cm) of space for the ac power cord, the
AdvanceStack 8U/16U SNMP module, and a serial connector.

Ensure that the HP AdvanceStack hub(s) do not overload the power
circuits, wiring, and over-current protection

possibility of overloading the supply circuits, add together the
ampere ratings from the nameplates of all your hubs (and other
equipment) installed on the same circuits and compare the total with
the rating limits for the supply circuits.

Do not install the HP AdvanceStack hub in an environment where
the operating ambient temperature might exceed 55°C (131°F).

Make sure the air flow around the sides of the hub is not restricted.

Installing the Hub

. To determine the

Important

Marking the Location

A hub should be mounted only to a wall or wood surface that is
at least 1/2-inch (12.7 mm) plywood or its equivalent.

1. Using the illustration on the next page, mark the screw hole locations
on the mounting surface 4 13/16 inches (122.2 mm) apart. Make sure
you allow enough room to make the cable connections to the hub
and to be able to access the cables if they have to be moved.

2. Using a Phillips (cross-head) screwdriver, screw in the two pan head wood
screws leaving 1/8th inch (3 mm) between the screw head and the mounting
surface. (You may need to first pre-drill the surface with a 3/32-inch bit.)

1-7

Installing the Hub

Mounting the Hub

After the screws are in place, follow the steps below for mounting the hub
on a wall or under a desk.

1. For a vertical mount (such as a wall), place the bottom of the hub
against the screws. For a horizontal mount under a surface such as a
desk or table, turn the hub upside down and gently place the hub up
against the screws.

Installing the Hub

2. Slide the hub in either of the two diagonal directions to secure the
hub into place.

(Actual size of number 6
by half-inch or
M3 x 12 mm pan head
wood screw)

1-8

Installing the Hub

4. Complete the network connections

to the hub

Reconnect the hub to the power source and then make the network
connections to the hub. Typical hub connections are:

Hub-to-device connections.

as computers and printers.

Hub-to-hub connections

Hub or other Ethernet hub.

Hub-to-network backbones.

This section describes the different ways you can connect your hub to your
network.

Connecting Devices to the Hub

To connect a device to the hub, push the RJ-45 plug into the RJ-45 jack until
the tab on the plug clicks into place.

Connecting to network devices such

. Connecting to another HP AdvanceStack

Connecting to a network backbone.

Installing the Hub

RJ-45 plug

unshielded twisted-pair cable

to a computer or printer

1-9

Installing the Hub

Connecting Hubs Together

Twisted-Pair Cascade Connections

To expand your network, the hub can be connected to other hubs by using
the Media Dependent Interface (MDI) switch.

The MDI/MDI-X switch controls how the signals are sent through the twisted-

Installing the Hub

pair cable connected to Port 1. The hub is shipped with the switch in the
MDI-X position. The switch is a pushbutton switch with
two positions:

In the MDI position, use Port 1 to connect your hub to another
hub. In this position, the hub reverses the Tx and Rx port pins for
you. This allows you to use “straight-through” cable rather than
“cross-over” cable to connect two hubs together.

In the MDI-X position, use Port 1 to connect your hub to a PC or
similar device using “straight-through” cable. In the MDI-X position,
the switch is exposed by 0.10 inches (2.5 mm) in front of the bezel.

Caution

MDI/MDI-X
switch

You must disconnect the device connected to Port 1 before changing the
position of this switch. If you push the MDI/MDI-X switch and change
its position while your network is running, the hub or PC connected to
Port 1 will be disrupted. To restore your connection, push the
MDI/MDI-X switch in again.

1-10

Installing the Hub

In the following illustration, the first hub is connected to two end nodes and
to a second hub.

Hub attached to Port 1:
switch in MDI position and
straight-through cable is used.

Up to 100 meters

PC attached to Port 1:
switch in MDI-X position
and straight-through
cable is used.

Installing the Hub

ThinLAN Connections

With an HP ThinLAN Transceiver Module for 10Base-2 networks, you can
connect your hub to a thinLAN network. The following illustration shows a
hub with an HP ThinLAN Transceiver Module connected to a ThinLAN
backbone.

50-ohm terminator

HP J2608A ThinLAN
Transceiver Module installed
in the AUI/Xcvr Slot

thin coax cable

1-11

Installing the Hub

You can connect up to 30 hubs together on a common ThinLAN segment.
The ThinLAN segment can include a computer attached to a hub at one end
of the segment that can communicate with a computer attached to another
hub at the other end of the segment. By using the BNC port on the module,
the maximum repeater hop-count increment through the entire segment is
only two. The following illustration shows you how to connect three hubs
together from one ThinLAN port to another.

Installing the Hub

50-ohm
terminator

ThinLAN coax
connecting the
hubs together

50-ohm
terminator

Hub-8U

Hub-8U

HP AdvanceStack
10Base-T Hub-24

Connecting Hubs to Network Backbones

Connecting the Hub-8U to a ThinLAN Backbone

The optional ThinLAN Transceiver Module has a BNC 10Base-2 port that can
be used to connect your hub to a ThinLAN backbone.

1-12

Installing the Hub

The following illustration shows a hub with an HP ThinLAN Transceiver
Module connected to a thinLAN backbone.

ThinLAN
backbone

Installing the Hub

Connecting the Hub-8U to a Fiber-Optic Backbone

With an HP Fiber-Optic Transceiver Module for 10Base-FL networks, you
can connect your hub to a fiber-optic backbone. The following illustration
shows a hub with an HP Fiber-Optic Transceiver Module connected to a fiber­optic backbone:

fiber-optic
cable

HP J2606A Fiber-Optic
Transceiver Module installed
in the AUI/Xcvr Slot

For more information about cabling configuration, see the documentation
accompanying the optional transceiver modules.

See the Designing HP AdvanceStack Networks guide for information on
valid network topologies.

1-13

Installing the Hub

5. Connect the hub to an ASCII

console (optional)

The optional HP AdvanceStack 8U/16U SNMP Module enables you to
configure, monitor, and troubleshoot the hub from an ASCII console.

Installing the Hub

ASCII console

1-14

2

Troubleshooting Approaches
Diagnosing with the LEDs
Installation Problems
Cabling Problems
Unusual Network Activity
Diagnostic Tests
Customer Support Services
Replacement Instructions

Troubleshooting

Troubleshooting

This chapter describes how to diagnose and resolve operating problems with
your hub.

Additionally, if you have an HP J3133A AdvanceStack 8U/16U SNMP Module
installed, you can use ASCII console software for certain diagnostic
functions to troubleshoot the hub.

Troubleshooting Approaches

There are three primary ways to diagnose hub problems:

By checking the LEDs on the front of the hub as described in
“Diagnosing with the LEDs” later in this chapter.

By visually inspecting the unit and all its connections as described in
the “Installation Problems” and “Cabling Problems” sections later in

Troubleshooting

this chapter.
By using the ASCII console’s diagnostic functions as described in the

documentation shipped with the HP AdvanceStack 8U/16U SNMP
Module, and in the software’s online help system.

2-2

Troubleshooting

Diagnosing with the LEDs

Most problems with the hub can be diagnosed using the LEDs on its front
panel. This section describes the normal LED pattern during self-test, and
LED patterns that indicate error conditions on the hub.

LED Pattern During Self-Test

Whenever the hub is powered on or reset, it performs a self-diagnostic test.
During the self-test, all of the LEDs turn on for a short time.

If an HP Transceiver module is properly installed, the AUI/Xcvr LED stays
lit. If an HP Transceiver module is not installed, the AUI/Xcvr LED turns off.

When the self-test completes successfully, the LEDs go into their normal
operational states. If a hub hardware fault exists, the hub will not complete
self-test. This will be indicated by an abnormal LED pattern.

The display of the Port LEDs pattern depends on whether the HP AdvanceS­tack 8U/16U SNMP Module is installed. If you have an HP AdvanceStack
8U/16U SNMP Module installed, see the manual provided with the module
for LED information.

The tables on the following two pages list the hub’s LEDs, their possible
states, and diagnostic tips to resolve any error conditions. These tables
assume an HP AdvanceStack 8U/16U SNMP Module is

not

installed.

Troubleshooting

2-3

Troubleshooting

LED Error Indications

LED patterns indicating problems Diagnostic Tips

Power Collision AUI/Xcvr

Port

OFF * * *

Troubleshooting

ON * * OFF

Twisted-Pair

Port

Verify that the power supply is plugged into an
active power source and to the hub. Make
sure these connections are snug. Try power
cycling the hub by unplugging and plugging
the hub back in.

If the Power LED is still not on, verify the ac
source works by plugging another device into
the outlet. Or try plugging the hub into a
different outlet. If this condition persists, call
your HP-authorized LAN dealer or HP
representative for assistance.

Check cabling on the indicated port all the
way out to the device attached to that port.
Faulty wiring or a bad connection could exist
somewhere in that connection.

The end node or hub attached to the port is off.

If you have an HP AdvanceStack 8U/16U
SNMP Module installed, see the module
manual.

2-4

ON * OFF *

ON * * Flashing

intermittently

*This LED is not important for the diagnosis.

If port 1, check the position of the MDI/MDI-X
switch. For hub-to-hub connections, set the
switch to MDI. For hub-to-PC connections, set
the switch to MDI-X.

Verify that the HP Transceiver Module is firmly
inserted into the AUI/Xcvr slot into the back of
the hub. See the documentation
accompanying the HP Transceiver module for
more troubleshooting information.

Check cabling on indicated port.

If you have an HP AdvanceStack 8U/16U
SNMP Module, see the HP AdvanceStack
8U/16U SNMP Module manual to troubleshoot
this port with the ASCII console.

LED patterns indicating problems Diagnostic Tips

Troubleshooting

Power Collision AUI/Xcvr

Port

ON Appears

solidly

ON

ON * * Slow

ON * Slow

Flash

Twisted-Pair

**

Port

Flash

*

Very frequent collisions are occurring, which
could indicate a network fault or improperly
terminated cable.

A transceiver attached to the AUI port may not
have the SQE test disabled. For information
about the SQE test, see your documentation
accompanying your transceiver module.

Troubleshooting

If you have an HP AdvanceStack 8U/16U
SNMP Module installed, see the manual for
the module.

The port has been auto-partitioned because of
an excessive collision condition. Check cable
connections and status of attached network
devices for causes of the excess collisions.

The transceiver port has been auto­partitioned because of too many collisions.
Check cable terminations, connections, SQE
setting on any external transceivers, and
status of attached network devices for causes
of the excess collisions.

ON * * After self-

test, all ports
are ON for an

extended

period of time.

* This LED is not important for the diagnosis.

The hub has failed its self-test. Power-cycle
the hub. If this condition persists, call your HP­authorized LAN dealer or HP representative
for assistance.

2-5

Troubleshooting

Installation Problems

By carefully following the installation procedures described in chapter 1,
“Installing the Hub”, you can avoid most problems caused by improper
installation of the hub or one of its components.

Incorrect Hardware Installation

Incorrectly installing the hub, ac power cord, power supply, the HP Ad­vanceStack 8U/16U SNMP Module, or a transceiver module can result in one
or all of these components malfunctioning or not functioning at all. If one or
all of these components appear to not be functioning, re-check the installa­tion procedure and, if necessary, re-install the component correctly.

Troubleshooting

Cabling Problems

A high percentage of network problems are due to faulty cabling. Cabling
problems usually result in the failure of a hub to connect to a network,
another hub, or the end nodes.

Connections

All cables attached to the hub should be checked to see that they are
properly connected. Proper network connections are described in chapter 1,
“Installing the Hub”.

Properly connecting cables to the transceiver modules is described in the
documentation that accompanies those modules.

If you are using the optional HP ThinLAN Transceiver Module, be certain
that the thin coax segment attached to the port is properly terminated with
a 50-ohm terminator at both ends, as described in the manual accompanying
the transceiver module.

2-6

Troubleshooting

Non-standard Cables

Mis-wired cables may cause numerous network collisions, and can seriously
impair network performance. Before connecting cables into your network,
you should verify that they comply with the applicable standards. For a list
of compatible cables and a description of the pinouts for each port on the
hub (which can be used to confirm the compatibility of unlisted cables), see
appendix A, “Cables and Connectors”.

Topology

It is important to make sure you have a valid network topology. Common
topology faults include excessive cable length and excessive repeater delays
between nodes. If you have trouble after recent changes to a network,
switch back to the previous topology. If you no longer have any trouble, the
new topology is probably at fault. Refer to the guide entitled Designing
HP AdvanceStack Networks for topology configuration guidelines. Contact
your HP-authorized LAN dealer or local HP sales office to get a copy of this
guide.

Troubleshooting

Unusual Network Activity

Network activity that exceeds accepted norms often indicates a hardware
problem with one or more of the network components, possibly including
the hub. Unusual network activity is usually indicated by the LEDs on the
front of the hub or measured with one of the diagnostic tools in the ASCII
console. Refer to “Diagnosing with LEDs” earlier in this chapter for
information on using LEDs to identify unusual network activity.

2-7

Troubleshooting

Diagnostic Tests

If you have an HP AdvanceStack 8U/16U SNMP Module installed into the
hub, the ASCII console provides tests and indicators that can be used to
monitor the hub and its network connections. See the documentation shipped
with the HP AdvanceStack 8U/16U SNMP Module and the console’s online
Help system for more details about these tests and indicators.

Testing the Hub Only

If you believe that the hub is not operating correctly, you can test the hub’s
circuitry by resetting the hub through one of these procedures:

Unplug the ac adapter from the hub and plug the ac adapter into the
hub again.

Troubleshooting

If an HP AdvanceStack 8U/16U SNMP Module is installed, select the
“Reset” option from the ASCII console or press the Reset button on
the module..

Caution

Each of these procedures will power-cycle the hub and execute its self-test.
If all of the Port LEDs stay on after 3 seconds, the hub may have failed its
self-test. See “Diagnosing with the LEDs” earlier in this chapter to interpret
the LED display.

Cycling power on the hub will temporarily disable the network and
could have other adverse effects.

Testing Twisted-Pair Cabling

The twisted-pair cable attached to the hub must be compatible with the
IEEE 802.3 Type 10Base-T standard. To verify that your cable is compatible
with this standard, you can use the HP J2263A Cable Test Set. The older HP
28687A Wire Test Instrument can also be used. HP also offers a wire testing
service. Contact your HP-authorized LAN dealer or your local HP sales office
for more information.

2-8

Troubleshooting

Testing End-to-End Network Communications

Both the hub and the cabling can be tested by running an end-to-end
communications test — a test that sends known data from one network
device to another through the hub — such that you can verify that the data
was correctly transmitted between the devices. For example, if you have
two PCs on the network that have HP LAN adapter cards, you can use the
“Link Test” option from the card’s test program to verify the entire communi­cation path between the two PCs. In the following illustration, two computers
are connected together with twisted-pair cable to two different ports on the
hub.

PC sending
test packets

Troubleshooting

PC responding to
the test packets

See your LAN adapter card’s manual for information on running an end-to-end
communication test.

With the AdvanceStack 8U/16U SNMP module, you can also run a Link test
directly to or from a hub (directly between a hub and another device, rather
than just through the hub).

2-9

Troubleshooting

Replacement Instructions

Remove any of the optional modules that you have installed into your hub
before returning it to Hewlett-Packard. Keep the optional modules to install
them into the replacement hub.

The modules can be damaged easily by small amounts of static electricity.
Observe these precautions when removing and installing the modules:

When handling the module, first touch a grounded metal surface, or
wear an anti-static wrist strap that is attached to grounded metal.

To prevent generating static electricity, minimize your movement
around the work area, or work in an anti-static work area.

Handle the module carefully at all times. Avoid flexing it or touching
its components.

The faulty hub should be returned to Hewlett-Packard with the AUI/Xcvr

Troubleshooting

and management slots empty and the cover plates installed.
For information about how to remove the modules, see the manuals

accompanying the HP Transceiver Module and the HP AdvanceStack 8U/16U
SNMP Module.

2-10

Troubleshooting

Customer Support Services

Hewlett-Packard offers support 24 hours a day, seven days a week through
the use of automated electronic services including:

World Wide Web
Hewlett-Packard FTP Library Service on the Internet
CompuServ
Hewlett-Packard BBS
HP FIRST FAX Retrieval Service
HP Network Phone-In Support (NPS)

Troubleshooting

SNMP firmware for the AdvanceStack 8U/16U SNMP module (
available through several of the above services. Refer to the card at the front
of this manual.

j3133a.exe

) is

2-11

3

Front of the Hub
Back of the Hub
Hub Operation

Hub Reference

Hub Reference

Front of the Hub

Hub status LEDs

The hub status LEDs indicate whether the hub is functioning properly. For
further details on error conditions indicated by the Status LEDs, see chapter
2, “Troubleshooting”.

LED State Meaning of LED

Power
(green)

Activity
(green)

Collision
(orange)

On The hub is receiving power.
Off The hub is not receiving power.

Flickering ON while a packet is being transmitted. Normally, the LED

appears to flicker. In heavy traffic, it may appear on all the time.

Flickering This LED is on while a collision is detected on any of the attached

cable segments. If collisions are infrequent (which is normal) the
light may be imperceptible. In a network with heavy traffic, the
LED will glow and flicker dimly, indicating collisions are
occurring. If it appears on continuously (with no flicker), it is a
possible indicator of a network fault. See chapter 2,
“Troubleshooting”.

Hub Reference

3-2

Hub Reference

Port status LEDs

The following table provides LED port status information. If an
AdvanceStack 8U/16U SNMP module is installed, additional LED states may
be observed. For information about the hub LEDs when a module is
installed, see the manual accompanying the module.

LED State Meaning of LED

AUI/Xcvr
Port (green)

Twisted-pair
Port (green)

* The slow flash is approximately once every 1.5 seconds.

On An optional HP Transceiver Module is properly installed in the

hub’s back panel slot.

Off An HP Transceiver Module is not installed.

Slow

Flash*

On Link beat is detected from the attached node.
Off The port is not receiving the link beat signal from the attached

Slow

Flash*

The HP Transceiver Module port has auto-partitioned. See
“Auto-Partitioning” later in this chapter.

node.
The port has been auto-partitioned. See “Auto-Partitioning”

later in this chapter.

Hub Reference

3-3

Hub Reference

Back of the hub

The back of the hub has two slots: the Management Slot and the AUI/Xcvr
Slot.

Management Slot

The management slot is used to add an HP J3133A AdvanceStack 8U/16U
SNMP Module. For more information, see the “Install Add-in Modules”
section in chapter 1.

AUI/Xcvr Slot

The AUI/Xcvr Slot is used to add an HP Transceiver Module. For more
information, see the “Install Add-in Modules” section in chapter 1.

Hub Reference

3-4

Hub Reference

Hub Operation

The HP AdvanceStack Hub-8U is a multiport repeater that conforms to the
IEEE 802.3 repeater specification. Data signals coming into the hub from
any of its ports are automatically regenerated and transmitted to all the
other hub network ports. The hub regenerates the data without interpreting
the contents, so it can be used in either IEEE 802.3 or Ethernet networks
and with any upper-level protocol.

Collision Detection

The hub also performs collision detection. A collision occurs when two
nodes try to transmit at the same time. When the hub detects a collision, it
stops repeating the colliding transmissions and starts transmitting a jamming
signal. The jamming signal tells the transmitting nodes that a collision has
occurred. The colliding nodes then stop transmitting for a random amount of
time before attempting to retransmit the data. Once the collision condition is
removed, the hub stops transmitting the jamming signal and normal operation
is resumed.

Auto-Partitioning

The hub will automatically partition (temporarily disable) one of its ports if
a collision condition exists for an excessive duration (between 1024 and
2048 bit times) or occurs during each of 32 consecutive attempts to transmit.
The hub monitors the partitioned port and automatically re-enables the port
when a minimum length packet can be successfully transmitted or received
without a collision occurring.

Excessive collisions may be caused by faulty wiring. If a port’s transmit
(Tx +/-) wires have been shorted to the receive (Rx +/-) wires of any port,
a collision will be detected when that port attempts to transmit. If a port’s
receive (Rx +/-) wires are not connected properly, collisions may occur
because the hub cannot detect the presence of network traffic on that port
and may thus transmit at inappropriate times.

A port may occasionally also become partitioned when network traffic is
extremely heavy causing an abnormally high collision rate.

Hub Reference

3-5

Hub Reference

Link Beat

Type 10Base-T devices use a signal called link beat (also called link test
pulse). This signal informs the hub of the presence of a device connected to
it over twisted-pair cable and of the integrity of the twisted-pair link between
them. The hub will not transmit packets out of twisted-pair ports that do not
sense the link beat signal.

Hub Reference

3-6

A

Recommended Cables
Twisted-Pair Cable/Connector Pin-Outs
ThinLAN Requirements

Cables and Connectors

Cables and Connectors

This appendix lists cables that have been tested and verified for use with the
HP AdvanceStack Hub-8U. It also includes minimum pin-out information so,
if you wish to use an unlisted cable, you can verify that the cables used in
your installation are correctly wired. Note that each pin-out does not
necessarily match the pin-out for the corresponding HP cable, but cables
manufactured to follow the minimum pin-out will function correctly.

Incorrectly wired cabling is the most common cause of problems for LAN
communications. HP recommends that you work with a qualified LAN cable
installer for assistance with your cabling requirements.

Recommended Cables

Cable Function Cable Type HP Product Number

Network connections to the hub:
Hub to end node

connection or hub to hub
connection using the
MDI/MDI-X switch

Twisted-pair “straight­through” cable

92268A (4 pair, 4 meters)
92268B (4 pair, 8 meters)
92268C (4 pair, 16 meters)
92268D (4 pair, 32 meters)
92268N (4 pair, 300 meters)

Cables and Connectors

You can contact your HP-authorized dealer or call HP at 1-800-538-8787 to
order these parts.

A-2

Cables and Connectors

Twisted-Pair Cable/Connector
Pin-Outs

Twisted-Pair Cable for Hub-to-Computer
Network Connection

To connect PCs or other network devices to the hub, use a “straight-through”
10Base-T cable. The twisted-pair wires must be twisted through the entire
length of the cable. The wiring sequence must conform to AT&T 258A (not
USOC). See “Twisted-Pair Cable Pin Assignments” later in this chapter for a
listing of the signals used on each pin.

Note

Straight-through cable

white/orange

orange/white

white/green

green/white

Pins 1 and 2
Pins 3 and 6

Pins 4, 5, 7, and 8 are not used in this application, although they may be
wired in the cable.

must

be a twisted pair.

must

be a twisted pair.

Cables and Connectors

A-3

Cables and Connectors

Twisted-Pair Cable Pin Assignments

Twisted-Pair Straight-Through Cable

Hub End Computer or

Transceiver End

Signal Pins Pins Signal

(receive +)
(receive –)
(transmit +)
(transmit –)

1
2
3
6

1
2
3
6

(transmit +)
(transmit –)
(receive +)
(receive –)

ThinLAN Cable Requirements

If you add an HP J2608A ThinLAN Transceiver Module, the thin coaxial
cables used with the module must comply with the IEEE 802.3 Type
10Base2 requirements. Some RG-58 A/U or RG-58 C/U cables meet these
requirements.

The maximum length of a single thin coaxial cable segment is 185 meters.
The minimum length (for example, to connect adjacent hubs in a rack) is

0.5 meter.

Cables and Connectors

A-4

B

Physical
Electrical
Environmental
Connectors
Electromagnetic

Specifications

Specifications

Physical

Electrical

Width: 21.6 cm (8.5 in) Height: 4.1 cm (1.6 in)
Depth: 17.0 cm (6.7 in) Weight: 0.8 kg (1.5 lb)

Specifications

ac voltage: 100-240 volts

Maximum current: 0.7 A max

Frequency range: 47/63 Hz

Environmental

Operating Non-Operating

Temperature: 0°C to 55°C

(32°F to 131°F)

Relative humidity:

(non-condensing)

Maximum altitude: 4.6 km (15,000 ft) 4.6 km (15,000 ft)

15% to 95%
at 40°C (104°F)

-40°C to 70°C
(-40°F to 158°F)

15% to 90%
at 65°C (149°F)

Connectors

The RJ-45 twisted-pair ports are compatible with the IEEE 802.3
Type 10Base-T standard.

Safety

Complies with:
IEC 950: (1991)+A1,A2/.EN60950 I(1992)+A1,A2
UL1950
CSA 950
NOM-019-SCFI-1994
NOM-001-SCFI-1993

B-2

Electromagnetic

Specifications

Emissions

FCC part 15 Class A
EN 55022 Class A / CISPR-22 Class A
VCCI Level I
Complies with Canadian EMC Class A requirements

Immunity

See the Declaration of Conformity for details at the end of the Regulatory Statements.

Accoustic Noise

Not applicable

Specifications

B-3

C

This chapter covers the following topics:

Safety and Regulatory Statements
Declaration of Conformity

Safety and Regulatory Statements

Safety Information

Safety Symbols

Documentation reference symbol. If the product is marked with this symbol,
refer to the product documentation to get more information about the product.

Statements

Safety and Regulatory

WARNING

CAUTION

A WARNING in the manual denotes a hazard that can cause injury or death.

A CAUTION in the manual denotes a hazard that can damage equipment.

Do not proceed beyond a WARNING or CAUTION notice until you have
understood the hazardous conditions and have taken appropriate steps.

Servicing

There are no user-serviceable parts inside these products. Any servicing, adjustment,
maintenance, or repair must be performed only by service-trained personnel.

These products do not have a power switch; they are powered on when the power cord is
plugged in.

2 Safety Information

Informations concernant la sécurité

Symboles de sécurité

Symbole de référence à la documentation. Si le produit est marqué de ce
symbole, reportez-vous à la documentation du produit afin d’obtenir des
informations plus détaillées.

WARNING Dans la documentation, un WARNING indique un danger susceptible d’entraîner

des dommages corporels ou la mort.

Safety and Regulatory

CAUTION Un texte de mise en garde intitulé CAUTION indique un danger susceptible

de causer des dommages à l’équipement.

Ne continuez pas au-delà d’une rubrique WARNING ou CAUTION avant
d’avoir bien compris les conditions présentant un danger et pris les mesures
appropriées.

Aucune pièce contenue à l’intérieur de ce produit ne peut être réparée par l’utilisateur. Tout
dépannage, réglage, entretien ou réparation devra être confié exclusivement à un personnel
qualifié.

Cet appareil ne comporte pas de commutateur principal ; la mise sous tension est effectuée
par branchement du cordon d’alimentation.

Statements

Informations concernant la sécurité 3

Statements

Hinweise zur Sicherheit

Sicherheitssymbole

Symbol für Dokumentationsverweis. Wenn das Produkt mit diesem Symbol
markiert ist, schlagen Sie bitte in der Produktdokumentation nach, um mehr
Informationen über das Produkt zu erhalten.

WARNING Eine WARNING in der Dokumentation symbolisiert eine Gefahr, die Verletzungen

oder sogar Todesfälle verursachen kann.

CAUTION CAUTION in der Dokumentation symbolisiert eine Gefahr, die das Gerät

beschädigen kann.

Fahren Sie nach dem Hinweis WARNING oder CAUTION erst fort, nachdem Sie
den Gefahrenzustand verstanden und die entsprechenden Maßnahmen ergriffen
haben.

Safety and Regulatory

Dieses Gerät enthält innen keine durch den Benutzer zu wartenden Teile. Wartungs-,
Anpassungs-, Instandhaltungs- oder Reparaturarbeiten dürfen nur von geschultem
Bedienungspersonal durchgeführt werden.

Dieses Gerät hat keinen Netzschalter; es wird beim Anschließen des Netzkabels eingeschaltet.

4 Hinweise zur Sicherheit

Considerazioni sulla sicurezza

Simboli di sicurezza

Simbolo di riferimento alla documentazione. Se il prodotto è contrassegnato da
questo simbolo, fare riferimento alla documentazione sul prodotto per ulteriori
informazioni su di esso.

WARNING La dicitura WARNING denota un pericolo che può causare lesioni o morte.

Safety and Regulatory

CAUTION La dicitura CAUTION denota un pericolo che può danneggiare le attrezzature.

Non procedere oltre un avviso di WARNING o di CAUTION prima di aver
compreso le condizioni di rischio e aver provveduto alle misure del caso.

Nessun componente di questo prodotto può essere riparato dall’utente. Qualsiasi lavoro
di riparazione, messa a punto, manutenzione o assistenza va effettuato esclusivamente
da personale specializzato.

Questo apparato non possiede un commutatore principale; si mette scotto tensione all’inserirsi
il cavo d’alimentazione.

Statements

Considerazioni sulla sicurezza 5

Statements

Consideraciones sobre seguridad

Símbolos de seguridad

Símbolo de referencia a la documentación. Si el producto va marcado
con este símbolo, consultar la documentación del producto a fin de obtener
mayor información sobre el producto.

WARNING Una WARNING en la documentación señala un riesgo que podría resultar en

lesiones o la muerte.

CAUTION Una CAUTION en la documentación señala un riesgo que podría resultar en

averías al equipo.

No proseguir después de un símbolo de WARNING o CAUTION hasta no
haber entendido las condiciones peligrosas y haber tomado las medidas
apropiadas.

Safety and Regulatory

Este aparato no contiene pieza alguna susceptible de reparación por parte del usuario.
Todas las reparaciones, ajustes o servicio de mantenimiento debe realizarlos solamente
el técnico.

Este producto no tiene interruptor de potencia; se activa cuando se enchufa el cable de
alimentación.

6 Consideraciones sobre seguridad

Safety Information

Safety and Regulatory

Statements

Safety Information 7

Regulatory Statements

FCC Statement (For U.S.A. Only)
Federal Communications Commission Radio Frequency Interference
Statement

Statements

Safety and Regulatory

Warning:

installed and used in accordance with the instruction manual, it may cause interference to radio
communications. It has been tested and found to comply with the limits for a Class A comput­ing device pursuant to Part 15 of FCC Rules, which are designed to provide reasonable protec­tion against such interference when operated in a commercial environment. Operation of this
equipment in a residential area is likely to cause interference, in which case the user at his own
expense will be required to take whatever measures may be required to correct the interference.

If this equipment causes interference to radio reception (which can be determined by unplug­ging the power cord from the equipment) try these measures: Re-orient the receiving antenna.
Relocate the equipment with respect to the receiver. Plug the equipment and receiver into differ­ent branch circuits. Consult your dealer or an experienced technician for additional sugges­tions.

This equipment generates, uses, and can radiate radio frequency energy. If it is not

VCCI Class 1 (For Japan Only)

Note

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.

8 Regulatory Statements

Safety and Regulatory

Statements

Regulatory Statements 9

Statements

Safety and Regulatory

Declaration of Conformity

The following Declaration of Conformity for the HP AdvanceStack Hub-8U
complies with ISO/IEC Guide 22 and EN 45014. The declaration identifies
the product, the manufacturer’s name and address, and the applicable specifi­cations that are recognized in the European community.

10 Declaration of Conformity

Index

Index

Index

A

ac adapter

plugging into the hub, 1-5, C-2

plugging into the wall, 1-5
Activity LED, 3-2
AdvanceStack Assistant, v
at a glance, iii
ASCII console, 1-14
AUI/Xcvr LED, 3-3
AUI/Xcvr slot, 3-4
auto-partitioning

basic operation, 3-5

B

back of the hub

installing optional modules, 1-3
BBS

obtaining software from, 2-11
brackets, mounting

how to order, 1-8
bulletin board

obtaining software from, 2-11

diagnosing with the LEDs, 2-3
diagnostic tests, 2-8

testing the hub only, 2-8
testing twisted-pair cabling, 2-8

E

electrical specifications, B-2
electromagnetic specifications, B-2
environmental specifications, B-2, C-2
Ethernet networks, iii
external power supply, 1-2

F

fax

using to get HP product information, 2-11
features, v
fiber-optic backbone, 1-13
front of the hub

status LEDs, 3-2
ftp

obtaining files from HP, 2-11

C

cables

cabling problems, 2-6
network connections, A-2

twisted-pair connector pin-outs, A-3
cables and connections, A-2
collision detection, 3-5
Collision LED, 3-2
CompuServe

obtaining files from, 2-11
connections

hub-to-hub networking, 1-10

network, 1-9

out-of-band management, 1-14
connector specifications, B-2
countries

ac adapters for, 1-2
customer service

types of, 2-11

D

Declaration of Conformity, C-10
description, iii

H

Hourly support

calling for, 2-14

HP AdvanceStack SNMP Module

LED pattern during self-test, 2-3
part of hub installation, 1-3

HP FIRST FAX Retrieval Service

using, 2-14

HP FTP Library Service

using, 2-12

hub

at a glance, iii
cables, A-2
connecting to fiber-optic backbone, 1-13
connecting to network backbones, 1-12
description, iii
features, v
included parts, 1-2
installation problems, 2-6
installing, 1-2
mounting, 1-7, C-2
operation, 3-5
replacing, 2-10
specifications, B-2
troubleshooting, 2-2

Index-2

Index

hub operation

auto-partitioning, 3-5

collision detection, 3-5

link beat, 3-6

verifying, 1-5
Hub-8U

ThinLAN connections, 1-11
hub-to-hub network connections

using the ThinLAN port, 1-14

with the MDI switch, 1-10

I

IEEE 802.3 Type 10Base-T standard, iii
included parts, 1-2
installation problems, 2-6
installing the hub

equipment needed, 1-7

mounting procedures, 1-7, C-2

network connections, 1-9

out-of-band management connections, 1-14

summary of steps, 1-2

verifying hub operation, 1-5

wall mounting, 1-7
Internet

obtaining latest drivers from, 2-12

obtaining software from, 2-11

L

M

management slot, 3-4
managing the hub, 1-14

MDI switch, using, 1-10
MDI-X switch, using, 1-10
mounting brackets

ordering, 1-8

mounting the hub, 1-7

precautions, 1-7
under a desk, 1-8
wall mounting, 1-7

N

Network backbones, 1-12
network connections

hub-to-hub connections, 1-10

port connections, 1-9
network management, v
non-standard cables, 2-7

O

operation of the hub

description, 3-5
out-of-band management

connecting to the hub, 1-14

Index

LAN adapter cards

to test end-to-end communications, 2-9

LEDs

Activity, 3-2
AUI/Xcvr, 3-3
Collision, 3-2
diagnosing the hub status, 2-3
pattern during self test, 2-3
patterns showing error conditions, 2-4
Power, 3-2
twisted-pair ports, 3-3
verifying hub operation, 1-6

link beat

description, 3-6

list

included parts, 1-2

P

partitioning

automatic partitioning of ports, 3-5
parts list, 1-2
physical specifications of hubs, B-2
port LEDs

twisted-pair, 3-3
ports

connection procedures, 1-9
power

LED pattern during, 2-3

Precautions, 1-3, 1-5
Power LED, 3-2
precautions for mounting the hub, 1-7
procedures

hub installation, 1-2

network connections to the hub, 1-9

network port connections , 1-9

wall mounting the hub, 1-7

Index-3

Index

Index

R

recommended cables, A-2
Regulatory statements, C-9
replacement

of the hub, 2-10

resetting the hub

troubleshooting procedure, 2-8

S

Safety information, C-2
screws

description, 1-7

specifications

connectors, B-2
electrical, B-2
electromagnetic, B-2
environmental, B-2
physical, B-2

status LEDs

description, 3-2

summary

installation steps, 1-2

twisted-pair cable

hub-to-computer connection, A-3

pin assignments, A-4

pin-outs, A-3

testing, 2-8
twisted-pair ports

LED description, 3-3

U

unusual network activity, 2-7

V

verifying hub operation, 1-5

W

wall mounting the hub, 1-7
World Wide Web

obtaining software from, 2-11
WWW

obtaining software from, 2-11

T

technical support

types of, 2-11
testing twisted-pair cabling, 2-8
ThinLAN connections, 1-11
ThinLAN port

cable requirements, A-4
topology faults, 2-7
transceiver modules

part of hub installation, 1-3
troubleshooting

approaches, 2-2

ASCII console, 2-8

cabling problems, 2-6

diagnosing with the LEDs, 2-3

diagnostic tests, 2-8

installation problems, 2-6

LED pattern during power-on, 2-3

LED patterns showing errors, 2-4

testing the hub, 2-8

testing the twisted-pair cables, 2-8

topology faults, 2-7

unusual network activity, 2-7

Index-4

H

©

© 1997 Hewlett-Packard Company
Printed in U.S.A. 7/97

Manual Part Number
J2610-90201, Edition 1

*J2610-90201*