ATEN US221A, US421A User Manual
USB 2.0 Peripheral Switch
USER MANUAL
US221A/ US421A
FCC Information
FEDERAL COMMUNICATIONS COMMISSION INTERFERENCE STATEMENT: This equipment has been tested and found to comply with the limits for a Class B digital service, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. Any changes or modifications made to this equipment may void the user’s authority to operate this equipment. This equipment generates, uses, and can radiate radio frequency energy. If not installed and used in accordance with 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 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 to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1)this device may not cause harmful interference, and
(2)this device must accept any interference received, including interference that may cause undesired operation.
KCC Statement
RoHS
This product is RoHS compliant.
US221A/ US421A
User Manual
Online Registration
You can register your product at our online support center:
International http://support.aten.com
Online Support
International
Email Support |
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support@aten.com |
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Online |
Technical Support |
http://support.aten.com |
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Support |
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Troubleshooting |
http://www.aten.com |
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Documentation |
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Software Updates |
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Telephone Support
For telephone support, call this number:
International |
886-2-8692-6959 |
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China |
86-400-810-0-810 |
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Japan |
81-3-5615-5811 |
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Korea |
82-2-467-6789 |
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North America |
1-888-999-ATEN ext 4988 |
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1-949-428-1111 |
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NorthAmerica
Email Support |
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support@aten-usa.com |
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Online |
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Troubleshooting |
http://www.aten-usa.com/support |
Technical |
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Documentation |
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Support |
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Software |
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Updates |
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Telephone Support |
1-888-999-ATEN ext 4988 |
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1-949-428-1111 |
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Package Contents
The US221A / US421A USB 2.0 Peripheral Switch package contains the following items:
1 2-port (US221A) or 4-port (US421A) USB 2.0 Peripheral Switch
1 1.8 m USB Type A to USB Type B Cable
1 User Instructions*
Check to make sure that all the components are present and that nothing got damaged in shipping. If you encounter a problem, contact your dealer.
Read this manual thoroughly and follow the installation and operation procedures carefully to prevent any damage to the unit, and/or any of the devices connected to it.
*Features may have been added to the US221A/ US421A since this manual was printed. Please visit our website to download the most up-to-date version of the manual.
Copyright © 2020 ATEN® International Co., Ltd.
Manual Part No. PAPE-1245-110G
Manual Date: 2020-06-18
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.
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Overview
The US221A / US421A is a 2/4-port USB 2.0 Peripheral Switch that allows up to 2/4 computers to share the use of a single USB peripheral device (such as a printer, scanner, mass storage drive, etc.*) on a one-at-a-time basis.
The peripheral focus can be given to a computer manually by using pushbuttons on the switch or by using the software-based configuration utility. In addition, the US221A/ US421A has a new Auto Switch function that stores commands sent to the USB peripheral device to be processed on a first-come, first-served basis, meaning that a print server is not required.
Compatible with both Windows and Mac, and with multifunction printer support, the US221A / US421A is the ideal way to share the latest USB 2.0 peripherals in a multimedia SOHO environment.
Note: The US221A / US421A does not support a USB hub peripheral device.
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Features
Enables two (US221A) or four (US421A) computers to share a single USB peripheral device
Simple port selection via pushbuttons or easy-to-use configuration utility
Auto Switch function – no need for a separate print server
USB 2.0 compliant
Supports transfer rates up to 480 Mbps
Multiplatform support – Windows and Mac
LED indicators display port focus
Overcurrent protection
Bus-powered
Hot pluggable
Buzzer indicates switching between computers
Supports multifunction printers
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System Requirements
Computers
The following equipment must be installed on each computer that is to be connected to the system:
USB host controller
Cables
USB to USB cables to connect the computers to the peripheral device.
Note: Only one USB Type A to USB Type B cable is provided in the US221A / US421A package. You will need to purchase an additional USB Type A to USB Type B cables for each computer you wish to connect to the US221A / US421A.
Operating Systems
Supported operating systems are shown in the table, below:
OS |
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Windows |
2000, XP, 2003, 2008, Vista |
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Mac |
OS X 10.4.5, 10.5 |
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Components
Top View
1 |
4 |
2
3
1
4 3 
2
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