This product can be used with the
following operating systems:
Windows XP, Me, 2000, 98se/98
4-Port Hi-Speed
Macintosh OS v 8/9/10.1
USB 2.0 Hub
Before You Begin
You must have at least the following:

Pentium 233-MHz or faster or equivalent with 32MB RAM

Available USB 1.1 Port For USB 1.1 Operation

Available USB 2.0 Port For USB 2.0 Operation

Windows XP, 2000, Me, 98, 98SE, Mac OS 8, 9, or 10/X for
USB 1.1 Operation

Windows XP, 2000, Me, 98, 98 SE or Mac OS X for
USB 2.0 Operation
Check Your Package Contents
These are the items included with your purchase:
If any of the below items are missing, please contact your reseller.
• DUB-H4 4-Port Hi-Speed USB 2.0 Hub
• USB 2.0 Cable
• Power Adapter
Using a power supply
(5V 2.5A)
with a different voltage
rating will damage and void
the warranty for this product.

©2002 D-Link Systems, Inc. All rights reserved. Trademarks or registered trademarks are the property of
their respective holders. Software and specifications subject to change without notice. DUB-H4.06252002

Installing the DUB-H4
A. Plug the USB type B connector
(the larger end of the cable) into
Type B
the back of the DUB-H4.
B. Plug the AC adapter into the DUB-
H4 and into a power socket in a
power-strip or a wall jack.
C. Plug the USB type A connector
(the narrow end of the cable) into
an available USB 2.0 port on
your computer (or USB 1.1 if you
don’t have USB 2.0).
Type A
D. Your computer will automatically detect and install the DUB-H4. You
may now connect USB 2.0 or USB 1.1 devices to an available USB
port on the front of the DUB-H4.

LED Indicator Description
The DUB-H4 features five LED indicators…
• The Power LED indicator is red and lights up when the DUB-H4 is
powered on by using the external power adapter. The DUB-H4 does not
run on power supplied from the computer (bus powered).
• The downstream LED indicators are green. Each port has one status
LED. The LED lights to indicate that the port is working.
• If a port becomes overloaded, a “current exceeded” event will take
place. The LED of the port will go off and the message “USB HUB
Current Limit Exceeded” appears on the monitor. Reset the DUB-H4 by
disconnecting it for 5 seconds and then powering it back on by connect-
ing the AC power adapter.
Power LED:
Port 1-4 LED:
Red = Power is On
Green = Port is Active
Off = Power is Off
= Port is Inactive

Tips and Technical Support
• When connecting USB cables between USB devices and the DUB-H4,
make sure that the cable is connected securely.
• Remember that when connecting USB 1.1 devices to a USB 2.0 hub or host
adapter, the USB 1.1 device will not work at USB 2.0 speeds.
• The DUB-H4 does not have an on/off switch. It is always on, once the exter-
nal power adapter has been plugged into a wall socket or power source.
• Connecting USB 1.1 devices to the DUB-H4 may cause all USB devices
connected to the hub to work at USB 1.1 speed. To ensure 480Mbps
throughput for your USB 2.0 devices, don’t connect USB 1.1 and USB 2.0
devices to the hub at the same time.
• D-Link recommends that while using a USB device that includes an AC
power adapter, that you use the power adapter to ensure proper power and
current supply to that device.
• Please remember to unplug devices properly to ensure that no data loss or
corruption takes place with your operating system.
Technical Support
You can find the most recent software and user documentation on the D-Link website.
D-Link provides free technical support for customers within the United States for the
duration of the warranty period on this product.
U.S. customers can contact D-Link technical support through our web site or by phone.
D-Link Technical Support over the Telephone:
(877) 45D-LINK or (877) 453-5465
24 hours a day, seven days a week
D-Link Technical Support over the Internet: