ATEN US-421 User manual

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2

Table of contents

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User Manual

US-221

US-421

Read this guide thoroughly and follow the installation and operation

procedures carefully in order to prevent any damage to the units and/or

any devices that connect to them.

This package contains:

1 US-221 or US-421 USB 2.0 Peripheral Switch

1 USB Cable

1 CD (software)

1 User Manual

If anything is damaged or missing, contact your dealer.

Copyright © 2004-2006 ATEN® International Co., Ltd.

Manual Part No. PAPE-1245-101G

Printing Date: 03/2006

ATEN and the ATEN logo are trademarks of ATEN International Co., Ltd. All rights

reserved. All other trademarks are the property of their respective owners.

Note: This equipment has been tested and found to

complywiththelimitsforaClassBdigitaldevice,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 energy,

and if not installed and used in accordance with the

instruction manual, may cause 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 can be determined by turning

the equipment off and on, the user is encouraged to try to

correct the interference by one or more of the following

measures:

Reorient or relocate the receiving antenna;

Increase the separation between the equipment and

receiver;

Connect the equipment into an outlet on a circuit

different from that which the receiver is connected;

Consult the dealer or an experienced radio/television

technician for help.

This product is RoHS compliant.

- 3 -

System Requirements

A USB Host Controller installed on the computer

An OS that supports the USB specification

Win98 SE or higher for optional switch program and hotkey

options

- 4 -

Overview

The US-221 / US-421 is a two (US-221) / four (US-421) port USB

2.0 Switch that allows up to two / four computers to share the use

of a single USB peripheral device (such as a printer, scanner,

modem, etc.) on a one-at-a-time basis.

The peripheral focus can be given to a computer manually, with

hotkeys, or a Windows®based program.

- 5 -

Features

USB 2.0 compliant

Fully backward compatible with USB 1.0 and USB 1.1

Bus powered - no external power supply necessary

Up to two (US-221) or four (US-421) computers can share a

single USB device

Supports transfer rates of 1.5/12/480 Mbps

Plug & Play

Hot pluggable - USB devices can be plugged and removed

without having to reset the system

LED status indicators

Hotkey (Windows OS only) or manual switching for easy

computer selection

Overcurrent protection

Beeper confirmation when switching

Windows based program for easy status monitoring/switching

Simple to install - No driver needed

- 6 -

Installation

The US-221 / US-421 provides two / four Type B USB ports for

computers to connect to, and one Type A USB port for the

peripheral device (printer, scanner, modem, etc.) that the

computers will share.

To install the USB 2.0 Switch:

1. Plug the Type B connector end of a USB cable into the

peripheral device's USB port; plug the Type A connector into

the US-221 / US-421's Type A port.

2. Plug the Type B connector end of a USB cable into any

available port on the US-221 / US-421; plug the Type A

connector into the computer's USB host port.

Repeat Step 2 for any other computers you are connecting.

1

2

- 7 -

Manual Operation

US-221

To toggle the peripheral focus between the two computers, press

and hold the port selection switch (located on the top of the unit)

until you hear the beep or see the next port’s LED light illuminate.

US-421

To switch the peripheral focus to another port, press the button

which corresponds to the port you want to give focus to.

- 8 -

Hotkey Operation (Windows Only)

Press [Num Lock] twice to bring the peripheral focus to your

computer.

Press [Scroll Lock] twice to move peripheral focus from the

current port to the next port (US-421 only). You must enable

the Next Port Hotkey to use this function (see p. 12).

- 9 -

Program Installation

To install the USB 2.0 Switch program:

1. Insert the installation disc included with your switch into the

CD-ROM drive. Double-click the USB 2.0 Switch icon and fol-

low the installation wizard.

2. When the installation completes, an icon labeled USB 2.0

Switch appears on your desktop and another icon appears in

the system tray.

Note: The program provided with the USB 2.0 Switch is

compatible only with Windows operating systems.

- 10 -

Program Operation

Basic Mode

To use the program to switch the device focus:

1. Right-click the USB 2.0 Switch icon (located in the system

tray). The Standard Mode pop-up menu appears:

2. Select Switch to take control of the peripheral device.

Note: Performing this action will take away control of the

peripheral device from any person who currently is

using it. If this may cause problems, we recommend

that you enable Switch and Reserve (see p. 13).