™
COPYRIGHT & TRADEMARKS
ProConnect Series
Copyright © 1999 Linksys, All Rights Reserved. ProConnect is a
registered trademark of Linksys. Microsoft, Windows, and the
Windows logo are registered trademarks of Microsoft Corporation.
All other trademarks and brand names are the property of their
respective proprietors.
USB 4-Port
Hub
LIMITED WARRANTY
Linksys guarantees that every USB 4-Port Hub is free from physi-
cal defects in material and workmanship under normal use for
One (1) year from the date of purchase. If the product proves
defective during this warranty period, call Linksys Customer
Support in order to obtain a Return Authorization number.
Warranty is for repair or replacement only. Linksys does not issue
refunds. BE SURE TO HAVE YOUR PROOF OF PURCHASE AND
BAR CODE ON HAND WHEN CALLING. RETURN REQUESTS
CANNOT BE PROCESSED WITHOUT PROOF OF PURCHASE
AND BAR CODE. When returning a product, mark the Return
Authorization number clearly on the outside of the package and
include your original proof of purchase and bar code.
IN NO EVENT SHALL LINKSYS’ LIABILITY EXCEED THE PRICE
PAID FOR THE PRODUCT FROM DIRECT, INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING
FROM THE USE OF THE PRODUCT, ITS ACCOMPANYING
SOFTWARE, OR ITS DOCUMENTATION. Linksys makes no war-
ranty or representation, expressed, implied, or statutory, with
respect to its products or the contents or use of this documenta-
tion and all accompanying software, and specifically disclaims its
quality, performance, merchantability, or fitness for any particular
purpose. Linksys reserves the right to revise or update its prod-
ucts, software, or documentation without obligation to notify any
individual or entity. Please direct all inquiries to:
Linksys P.O. Box 18558, Irvine, CA 92623.
FCC STATEMENT
Us e this guide to ins tall this
Links ys product:
This equipment has been tested and found to comply with the lim-
its for a Class A digital device, pursuant to Part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This
equipment generates, uses, and can radiate radio frequency ener-
gy and, if not installed and used according to the instructions, may
cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to
radio or television reception, which is found by turning the equip-
ment off and on, the user is encouraged to try to correct the inter-
ference by one or more of the following measures:
USBHUB04
USB 4-Port Hub
• Reorient or relocate the receiving antenna
• Increase the separation between the equipment or device
• Connect the equipment to an outlet other than the receiver’s
• Consult a dealer or an experienced radio/TV technician for
assistance
Us e r Guide
902
Rugged and ready for the road, the USB 4-Port
Hub is conveniently portable, since it draws its
power from from your computer’s USB port.
Got a notebook PC? No problem -- just plug in
the provided AC power supply to help preserve
your computer’s battery life.
Introduction
Congratulations on your purchase of the USB 4-
Port Hub from Linksys -- the fastest way to con-
nect Universal Serial Bus devices to your PC or
Macintosh. Plug a mouse or printer into your
desktop. Attach a full-sized keyboard to your note-
book. Hook up a scanner or digital camera in sec-
onds. If your PC is equipped with a USB port, the
USB 4-Port Hub makes connecting multiple USB
devices to it a snap!
As your needs grow, you can daisy-chain the
USB 4-Port Hub to additional USB hubs --if
your needs call for it, you can actually use up to
127 USB devices at the same time! Adding
devices to your computer has never been easier!
Ready to run right out of the box, the USB 4-Port
Hub lets you access up to four USB devices
simultaneously from your computer’s USB port,
allowing you to take advantage of the latest high-
speed, low-cost USB modems, keyboards, scan-
ners, cameras, speakers, and more -- all in one
easy step. Optimized for Windows 95 and
Windows 98, the USB 4-Port Hub is plug-and-
play compatible, which means USB devices are
configured and ready for use as soon as you plug
them in.
Some of the hub’s features include:
• Access Up to 4 Universal Serial Bus Devices
Simultaneously from a Computer’s USB Port
• Offers Simultaneous Access to All Devices --
Print, Scan, Web Surf, and More at the Same
Time
• Fast 12Mbps Data Transfer Rate -- Perfect for
High-Speed Scanners, Video, Printers, and
More
Equipped with advanced hotswap technology, the
hub even lets you attach or detach USB devices
while your computer is on, making it possible to
switch devices on the fly!
• Daisy-Chain Multiple USB Hubs Together for
Easy Future Expansion
• Plug-and-Play Compatible with Windows 95,
Windows 98, and MacOS for a Quick Setup
The 4-Port hub offers blazing access rates of up to
12 million bits per second -- the fastest in the
industry -- which makes it perfect for speed-hun-
gry devices like USB cameras and scanners.
• Fully Hotswappable --Attach or Detach
Devices with Power On
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• Built-in Data Collision Control -- Protects Data
Integrity when Using Multiple Devices
access to an enormous array of different devices at
the same time.
• Runs in Both Bus and Self-Powered Modes
Some of the devices that the USB 4-Port Hub sup-
ports include digital cameras and scanners, joy-
sticks, gamepads, virtual reality headgear and
gloves, keyboards, hard drives, mice, modems,
printers, speakers, and more.
About USB
USB, which is short for Universal Serial Bus, is a
technology designed to make connecting devices
to computers easier. Originally developed in 1996
by a group of computer industry leaders that
included Compaq, Digital, IBM, Intel, Microsoft,
NEC, and Northern Telecom, USB is quickly
becoming the first choice for users who want to
add peripherals to their computers.
USB is unique because it is plug-and-play, which
allows a computer to instantly recognize when a
device like a keyboard, mouse, or scanner has
been connected to it. Once the device has been
recognized, it’s ready to go -- no special setup is
required. Similarly, USB supports hot-swapping --
the insertion or removal of devices while the com-
puter is turned on. You can swap one device for
another without having to power down your sys-
tem or install any special software -- it really is
that easy.
Another unique USB feature is its ability to allow
multiple devices to be connected to a computer’s
single USB port. The USB 4-Port Hub, for exam-
ple, splits a computer’s USB port into four USB
ports. All four ports can operate simultaneously
and independent of each other, allowing easy
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should plug the AC adapter into your hub.
Hardware S e tup
If you decide to use the AC adapter, plug it into
the hub’s AC power adapter receptacle located on
the rear of the hub now.
Before installing the hub, make sure you have
received all of the following items. If any of the
items are damaged or missing, contact your ven-
dor for replacements:
Step 2
• USB 4-Port Hub
• AC Power Adapter
• 6’ USB Cable
• Plug your computer into the hub.
The USB 4-Port Hub came with a USB cable. One
end of the cable has a rectangular plug, which is
called an A-type connector. The other end of the
cable has a square shaped plug, or B-type connec-
tor.
After unpacking the hub, follow the steps below to
complete the installation.
Step 1
Insert the cable’s square B-type plug into the hub’s
Root Port, which is located on the rear of the hub.
• Plug in the AC power adapter (optional).
The USB 4-Port Hub can run with or without its
AC power adapter. If you decide not to use the
adapter, the hub will draw its power supply from
your computer’s USB port.
If you have a notebook computer, or if you have
lots of devices connected to your computer, you
might want to use the AC power supply -- it can
help boost signal strength between a PC and its
devices, and if you have a notebook, it will help
preserve your computer’s battery life.
Insert the other end of the cable (the A-type plug)
into your computer’s USB port. The computer is
now connected to the hub.
Some USB devices require more power than the
hub can supply in self-powered mode. If you plug
a device into your hub and it doesn’t work proper-
ly, it may need more power. In this case, you
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Step 3
LED Indicators
• Plug your USB device(s) into the hub.
While you are using your USB 4-Port Hub, one of
the two power LEDs will be lit. Depending on
whether or not you have chosen to use your hub’s
AC power adapter, you will see one of the follow-
ing light up.
The front of the USB hub has four rectangular A-
type ports where you can plug in USB devices. To
plug in a USB mouse, keyboard, or other device,
simply plug its A-type cable into any of the hub’s
four A-type ports. The installation is complete!
Bus Powered Indicates that the USB Hub is in
operation and is drawing power
from your PC.
Self Powered Indicates that the USB Hub’s
AC power adapter is connected
and is feeding power to the Hub
and all devices connected to it.
If the self powered LED is ON,
the hub is not drawing power
from your PC.
To PC
Using the Hub with USB Devices
Using the USB 4-Port Hub with a USB device is
easy -- after plugging in the device, just turn it on.
Your Windows 95 (revision OSR2 and above),
Windows 98, or MacOS computer should auto-
matically detect it. USB technology specifically
allows devices to be inserted or removed while
your PC’s power is on -- it’s true plug-and-play!
There are also 4 port-specific LEDs on the hub.
Each LED will light up if the port below it is
active and has a device attached to it.
Note: Your operating system must have USB sup-
port in order for you to utilize the USB 4-Port
Hub. For instance, some earlier versions of
Windows 95 do not support USB. If you are not
sure whether or not USB is supported by your
operating system, consult the documentation that
came with the operating system.
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Troubleshooting
S pe cifications
1. I plugged a device or other hub into my hub
and it doesn’t work.
Standard
OHCI, UHIC, and USB
Standard v1.0
First, verify that all of your cabling is connected
properly. See page 6 for help. Next, verify that
you are using an operating system that supports
USB. Some versions of Windows 95, Windows
NT and a number of Unix-based operating sys-
tems do not support USB.
Ports
1 Root Port; 4 Device Ports
Speed
12Mbps (High Speed)
1.5Mbps (Low Speed)
Depending on Device
Requirements
Some devices require more power than the hub
can supply in bus-powered mode. If a device does-
n’t work and you hub is in bus-powered mode,
plug in the AC adapter.
Data Modes
Isochronous and Asynchronous
Max Devices 127 (when multiple hubs are
daisy-chained together)
If you are connecting a device into your hub via a
serial-to-USB or parallel-to-USB converter, make
sure that the device does not require any more
than 500mA of power. 500mA is the maximum
amount of power that a USB port can supply. Any
device that needs more than 500mA of power can-
not be accessed through a USB port.
LEDs
Bus Power, Self Power,
Activity per port
Power
DC6V, 2.6A
Current
500mA per port (maximum)
5°C - 40°C for Safe Operation
0% - 80% for Safe Operation
4.0" x 3.75" x 1.0"
Temperature
Humidity
Dimensions
Weight
2. The computer doesn’t recognize the hub or any
other USB device.
The operating system has to support USB.
Windows 95 OSR2, Windows 98, and MacOS 8.1
or higher support USB.
3.7 oz.
Also, the USB ports on your PC may be disabled
in the BIOS. Use the BIOS menu to enable them.
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Customer Support
For help with the installation or operation of your
USB 4-Port Hub, contact Linksys Customer
Support at one of the phone numbers or Internet
addresses below.
Customer Support
Fax
Bulletin Board
949-261-1288
949-261-8868
949-261-2888
(33.6K, 8-N-1)
Email
Web
FTP Site
ftp.linksys.com
© Copyright 1999 Linksys, All Rights Reserved.
Printed in the USA.
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