HP J3128A AdvanceStack 10Base-T Hub-8E Manual de instalación y funcionamiento
HPJ3128AAdvanceStack
10Base-THub-8E
Installation and
Reference Guide
©Copyright Hewlett-Packard
Company 1996. All Rights Reserved.
Reproduction, adaptation, or translation
without prior written permission is
prohibited, except as allowed under the
copyright laws.
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
1
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
2
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
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.
4
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
5
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
50-ohm terminator
Thin coax segment
Minimum length: 0.5 meters.
Maximum length: 185 meters.
6
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