HP J3128A AdvanceStack 10Base-T Hub-8E Installations- und Betriebsanleitung

HPJ3128AAdvanceStack

10Base-THub-8E

Installation and

Reference Guide

©Copyright Hewlett-Packard

Reproduction, adaptation, or translation

without prior written permission is

prohibited, except as allowed under the

Publication Number

J3128-90001

Edition 1

February 1996

Applicable Product

HP J3128A

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 docu-

ment is subject to change without

notice. HEWLETT-PACKARD

COMPANY MAKES NO WARRANTY OF

ANY KIND WITH REGARD TO THIS

MATERIAL, INCLUDING, BUT NOT LIM-

ITED 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 statement

and the registration form included with

the product. A copy of the specific

warranty terms applicable to your

Hewlett-Packard product and replace-

ment parts can be obtained from your

HP Sales and Service Office or

authorized dealer.

HP J3128A AdvanceStack 10Base-T Hub-8E

Use the Hub-8E to connect computers, printers, and servers

together to allow users to share resources and data.

The steps to set up your network are:

1. Verify included parts

2. Verify that the hub works

3. Mount the hub

4. Connect devices to the hub

1. Verify Included Parts

Your package includes the following items:

one 8-port hub

AC adapter

this guide

warranty booklet

2. Verify That the Hub Works

To verify that the hub works, follow these steps:

1. Plug the AC adapter’s power cord into the hub’s AC

receptacle.

Your hub is shipped with one of these AC adapters:

Australia/New Zealand/China/Argentina

Europe/Russia

Israel

Japan

Korea

South Africa/India

United Kingdom/Hong Kong

U.S./Canada/Mexico/Taiwan/Brazil/Colombia

(9100-5509)

(9100-5511)

(9100-5514)

(9100-5508)

(9100-5513)

(9100-5512)

(9100-5510)

(9100-5507)

Note If your installation requires a different AC adapter than

the one supplied with the hub, contact your

HP-authorized LAN dealer or your local HP sales office.

2. Plug the AC adapter into an AC power source. When

installing the Hub-8E, note that the AC outlet must be located

near the equipment and should be easily accessible.

Note: The hub does not have a power switch; it is powered

on when the power cord is plugged in.

AC adapter power

cord

3. Check the LEDs on the hub’s front panel.

When the hub is powered on, it performs a 10 second self-

diagnostic test. During the test, each LED is lit momentarily.

When the self-test completes successfully, the following

events occur:

Before self-test completes, all of the LEDs light momentarily.

The following table describes the meaning of the LEDs:

LED Meaning

Activity% Reflects the amount of traffic on the

network as a percentage.

Collision% Identifies the percentage of collisions

which shows network saturation.

Partition Displays whether a port experienced

excessive collisions or the BNC port is not

properly terminated.

Link/Activity Displays the amount of network traffic for

this port.

Note that the bottom of the hub also provides information

about the meaning of the LEDs for this hub.

4. Before mounting the hub, unplug it. After the hub has passed

its self-test, you are ready to mount the hub.

Power LED stays on

The BNC Partition LED will remain litunless a

properly terminated thin coax segment is

attached. This LED does not affect the operation

of the other ports.

A Link/Activity LED stays on if a signal has been detected

through a cable connected to the corresponding port. A

Link/Activity LED turns off a signal is not detected.

3. Mount the Hub

The Hub-8E can be placed on a desk or mounted on any vertical or

horizontal surface, for example on 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 unclut-

tered area. You may want to secure the hub’s cables to the leg of the

table to prevent people from tripping over them. If you are placing

the hub on a table, skip the mounting instructions below and con-

tinue the installation procedure starting on page 5.

Equipment Required to Mount the Hub

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 by 12 mm pan head wood

screws (not included)

a Phillips (cross-head) screwdriver (not included)

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 back of the hub, leave

3 inches (76 mm) of space for twisted-pair cables and the AC

adapter.

Ensure that the HP AdvanceStack hub(s) do not overload the

power circuits, wiring, and over-current protection. To deter-

mine the possibility of overloading the supply circuits, add

together the amperage 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 40°C

(104°F).

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

restricted.

Marking the Location

Important 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. Mark the screw hole locations 5 11/16 inches (14.5 cm) apart

on the mounting surface. Make sure you allow enough room

to make the cable connections to the hub and 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 1/8-inch (3 mm) between the

screw head and the mounting surface. (You may need to

pre-drill the surface first with a 3/32-inch bit.)

4. Connect Devices to the Hub

RJ-45 Ports

You can connect printers, servers, personal computers, and other

Ethernet devices to these ports. Each computer must have a LAN

adapter card.

To connect a device to the hub, follow these steps:

1. Push the twisted-pair RJ-45 plug into the RJ-45 jack until the tab

on the plug clicks into place. Use up to 100 meters of cable

between the hub and an end node.

2. Connect the other end of the cable to a computer’s LAN adapter

card, printer interface card, server or other device.

RJ-45 plug

unshielded or shielded

twisted-pair cable

to a computer or printer

Adding More Users To Your Network

You can add more users to your network by joining two or more

hubs together using either thin coaxial cable or twisted-pair cable.

Using Thin Coaxial Cable

You can connect up to 30 hubs together on a common thin coax

segment. The following illustration shows you how to attach a BNC

“T” connector and a required terminator to a hub.

The following illustration shows two hubs connected together with

a thin coax segment:

Note Each thin coaxial segment must be

terminated using a 50-ohm terminator

at each end or the devices will not be

able to communicate together.

50-ohm terminator

BNC“T”connector

Thin coax segment

connected to an existing or

new thin coax network

Connect to hub

50-ohm terminator

Thin coax segment

Minimum length: 0.5 meters.

Maximum length: 185 meters.

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