ATEN US221A User manual

US221A/ US421A
USERMANUAL
USB2.0 Peripheral Switch
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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.
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US221A / US421A
User Manual
Online Registration
You can register your product at our online support center:
Online Support
International
Telephone Support
For telephone support, call this number:
International http://support.aten.com
Email Support [email protected]
Online
Support
Technical Support http://support.aten.com
Troubleshooting
Documentation
Software Updates
http://www.aten.com
International 886-2-8692-6959
China 86-400-810-0-810
Japan 81-3-5615-5811
Korea 82-2-467-6789
North America 1-888-999-ATEN ext 4988
1-949-428-1111
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North America
Email Support [email protected]
Online
Technical
Support
Troubleshooting
Documentation
Software
Updates
http://www.aten-usa.com/support
Telephone Support 1-888-999-ATEN ext 4988
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 Version
Windows 2000, XP, 2003, 2008, Vista
Mac OS X 10.4.5, 10.5
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Components
Top View
1
2
3
2
1
3
4
4
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Rear View
No. Component Description
1 Lock LED Lights orange to show that the US221A /
US421A is locked.
2 Port Selection
Pushbutton(s)
Pressing a Port Selection Pushbutton brings
control to the computer attached to its
corresponding port. See Manual Operation –
Pushbutton, page 13 for further details.
3 Port Selected
LEDs
Lights green to show that the computer
attached to its corresponding port has control.
4 Beeper On/Off
Switch (on side)
Use this recessed switch to turn the US221A /
US421A’s beeper on or off.
5 USB Type B
Computer Port
Your computers plug into these ports. See
Installation, page 11 for further details.
6 USB Type A
Peripheral Port
Your USB 2.0 peripheral device plugs into this
port.
5
6
5
6
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