USERS MANUAL 3

FCC ID: MSQWL500GD

Users Manual

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FCCID_483274

Chapter 4 - Wireless Performance

4. Wireless Performance
This section provides the user with ideas for how to improve the performance
of a ASUS Wireless network.

Site Topography
For optimal performance, locate wireless mobile clients and the ASUS
Wireless Routers away from transformers, heavy-duty motors, fluorescent
lights, microwave ovens, refrigerators, and other industrial equipment.
Signal loss can occur when metal, concrete, walls or floors block
transmission. Locate the ASUS Wireless Routers in open areas or add the
ASUS Wireless Routers as needed to improve coverage.
Microwave ovens operate in the same frequency band as the ASUS Wireless
Router. Therefore, if you use a microwave within range of the ASUS
Wireless Router you may notice network performance degradation.
However, both your microwave and your the ASUS Wireless Router will
continue to function.

Site Surveys

4. Performance
A site survey (utility provided with the WLAN PC card and CF card)
analyzes the installation environment and provides users with
recommendations for equipment and its placement. The optimum placement
differs for each model.

ASUS Wireless Router 89

Appendix -Troubleshooting

Troubleshooting
The ASUS Wireless Router is designed to be very easy to install and operate.
However, if you experience difficulties, use the information in this chapter
to help diagnose and solve problems. If you cannot resolve a problem, contact
Technical Support, as listed on the front of this manual.

Common Problems and Solutions
Problem
ASUS Wireless Router does not power up:

Solution
• Check for faulty the ASUS Wireless Router power supply by measuring
the output voltage with an electrical test meter.
• Check failed AC supply (power outlet)

Problem
Cannot communicate with the ASUS Wireless Router through a wired
network connection.

Solution
• Verify network configuration by ensuring that there are no duplicate IP
addresses. Power down the device in question and ping the assigned IP
address of the device. Ensure no other device responds to that address.
• Check that the cables used have proper pin outs and connectors or use
another LAN cable. Troubleshooting

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Appendix -Troubleshooting
Problem
My 802.11b PC Card will not associate with the ASUS Wireless Router.

Solution
Follow these steps:
1. Try to bring the devices closer together; the PC Card may be out of range
of the ASUS Wireless Router.
2. Confirm that the ASUS Wireless Router and PC Card have the same SSID.
3. Confirm that the ASUS Wireless Router and PC Card have the same
Encryption settings, if enabled.
4. Confirm that the ASUS Wireless Router’s Air and Link LEDs are solid
green.
5. Confirm that the authorization table includes or excludes the MAC address
of the WLAN PC card if “Wireless Access Control” is enabled.

Problem
The throughput seems slow.

Solution
To achieve maximum throughput, verify that your antennas are well-placed,
not behind metal, and do not have too many obstacles between them. If
you move the client closer to the ASUS Wireless Router and throughput
increases, you may want to consider adding a second the ASUS Wireless
Router and implementing roaming.
• Check antenna, connectors and cabling.
• Verify network traffic does not exceed 37% of bandwidth. Troubleshooting
• Check to see that the wired network does not exceed 10 broadcast messages
per second.
• Verify wired network topology and configuration.

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Appendix - Glossary

Glossary
Access Point - An access point is a device that allows wireless clients to
connect to other wireless clients and it acts as a bridge between wireless
clients and a wired Ethernet network.
Broadband - A type of data transmission in which a single medium (such
as cable) carries several channels of data at once.
Channel - Wireless access points allows you to choose different radio
channels in the wireless spectrum. A wireless LAN device operates within
the 2.4 GHz spectrum and a channel is within a FCC specified range, similar
to any radio channel.
Client - A client is the desktop or mobile PC that is connected to your
network.
Device name - Also known as DHCP client ID or network name. Sometimes
provided by an ISP when using DHCP to assign addresses.
DHCP (Dynamic Host Configuration Protocol) - This protocol allows a
computer (or many computers on your network) to be automatically assigned
a single IP address from a DHCP server.
DNS Server Address (Domain Name System) - DNS allows Internet host
computers to have a domain name and one or more IP addresses. A DNS
server keeps a database of host computers and their respective domain names
and IP addresses, so that when a user enters a domain name into the Internet
browser, the user is sent to the proper IP address. The DNS server address
used by the computers on your home network is the location of the DNS
server your ISP has assigned.
DSL Modem (Digital Subscriber Line) - A DSL modem uses your existing
phone lines to transmit data at high speeds.
Encryption - This provides wireless data transmissions with a level of
security.
ESSID (Extended Service Set Identifier) - You must have the same ESSID
entered into the gateway and each of its wireless clients. The ESSID is a
unique identifier for your wireless network.
Ethernet - Ethernet networks are connected by cables and hubs, and move
Appendix

data around. This is a standard for computer networks.

ASUS Wireless Router 95

Appendix - Glossary
Frame-bursting - Refers to burst mode. Burst mode optionally allows a
station to transmit a series of frames without relinquishing control of the
transmission medium.
Firewall - A firewall determines which information passes in and out of a
network. NAT can create a natural firewall by hiding a local network’s IP
addresses from the Internet. A Firewall prevents anyone outside of your
network from accessing your computer and possibly damaging or viewing
your files.
Gateway - A network point that manages all the data traffic of your network,
as well as to the Internet and connects one network to another.
Handshaking - handshaking refers to the signals that are transmitted
between communications networks that establish a valid connection between
two stations.
IEEE - The Institute of Electrical and Electronics Engineers. The IEEE
sets standards for networking, including Ethernet LANs. IEEE standards
ensure interoperability between systems of the same type.
IP Address (Internet Protocol) - An IP address consists of a series of four
numbers separated by periods, that identifies a unique Internet computer
host, allowing messages intended for that computer to be delivered to the
correct destination.
ISP (Internet Service Provider) - An ISP is a business that allows
individuals or businesses to connect to the Internet. Users log on to the
Internet using an account with an ISP or Internet Service Provider. ISPs
can serve IP addresses dynamically, or assign static (fixed) IP addresses to
individual computers.
ISP Gateway Address - The ISP Gateway Address is an IP address for the
Internet router. This address is only required when using a cable or DSL
modem.
LAN (Local Area Network) - A LAN is a group of computers and devices
connected together in a relatively small area (such as a house or an office).
Your home network is considered a LAN.
MAC Address (Media Access Control) - A MAC address is the hardware
address of a device connected to a network.
Appendix

96 ASUS Wireless Router

Appendix - GNU General Public License

Licensing Information
This product includes copyrighted third-party software licensed under the
terms of the GNU General Public License.
Please see The GNU General Public License for the exact terms and
conditions of this license.
Specially, the following parts of this product are subject to the GNU GPL:
• The Linux operating system kernel
• The iptables packet filter and NAT software
• The busybox swiss army knife of embedded linux
• The zebra routing daemon implementation
• The udhcpd DHCP client/server implementation
• The pptp-linux PPTP client implementation
• The rp-pppoe PPPoE client implementation
• The pppd PPP daemon implementation
• The dproxy DNS proxy implementation
• The bridge-utils package
All listed software packages are copyright by their respective authors. Please
see the source code for detailed information.

Availability of source code
ASUSTeK COMPUTER Inc. has exposed the full source code of the GPL
licensed software, including any scripts to control compilation and
installation of the object code. All future firmware updates will also be
accompanied with their respective source code. For more information on
how you can obtain our open source code, please visit our web site.
Appendix

98 ASUS Wireless Router

Appendix - GNU General Public License

The GNU General Public License

GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
59 Temple Place, Suite 330, Boston, MA 02111-307 USA
Everyone is permitted to copy and distribute verbatim copies of this
license document, but changing it is not allowed.

Appendix

ASUS Wireless Router 99

Appendix - GNU General Public License
Terms & conditions for copying, distribution, & modification
0. This License applies to any program or other work which contains a notice
placed by the copyright holder saying it may be distributed under the terms
of this General Public License. The “Program”, below, refers to any such
program or work, and a “work based on the Program” means either the
Program or any derivative work under copyright law: that is to say, a work
containing the Program or a portion of it, either verbatim or with
modifications and/or translated into another language. (Hereinafter,
translation is included without limitation in the term “modification”.) Each
licensee is addressed as “you”.
Activities other than copying, distribution and modification are not covered
by this License; they are outside its scope. The act of running the Program
is not restricted, and the output from the Program is covered only if its
contents constitute a work based on the Program (independent of having
been made by running the Program). Whether that is true depends on what
the Program does.

1. You may copy and distribute verbatim copies of the Program’s source code
as you receive it, in any medium, provided that you conspicuously and
appropriately publish on each copy an appropriate copyright notice and
disclaimer of warranty; keep intact all the notices that refer to this License
and on the absence of any warranty; and give any other recipients of the
Program a copy of this License along with the Program.
You may charge a fee for the physical act of transferring a copy, and you
may at your option offer warranty protection in exchange for a fee.

2. You may modify your copy or copies of the Program or any portion of it,
thus forming a work based on the Program, and copy and distribute such
modifications or work under the terms of Section 1 above, provided that
you also meet all of these conditions:
a) You must cause the modified files to carry prominent notices stat-
ing that you changed the files and the date of any change.
b) You must cause any work that you distribute or publish, that in whole
or in part contains or so derived from the Program or any part thereof,
to be licensed as a whole at no charge to all third parties under the
Appendix

terms of this License.

ASUS Wireless Router 101

Appendix - GNU General Public License
c) If the modified program normally reads commands interactively
when run, you must cause it, when started running for such interac-
tive use in the most ordinary way, to print or display an announce-
ment including an appropriate copyright notice and a notice that
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and that users may redistribute the program under these conditions,
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an announcement, your work based on the Program is not required
to print an announcement.)

These requirements apply to the modified work as a whole. If identifiable
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Thus, it is not the intent of this section to claim rights or contest your rights
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In addition, mere aggregation of another work not based on the Program
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3. You may copy and distribute the Program (or a work based on it, under
Section 2) in object code or executable form under the terms of Sections 1
and 2 above provided that you also do one of the following:
a) Accompany it with the complete corresponding machine-readable
source code, which must be distributed under the terms of Sections
1 and 2 above on a medium customarily used for software inter-
change; or,
Appendix

102 ASUS Wireless Router

Appendix - GNU General Public License
b) Accompany it with a written offer, valid for at least three years, to
give any third party, for a charge no more than your cost of physi-
cally performing source distribution, a complete machine-readable
copy of the corresponding source code, to be distributed under the
terms of Sections 1 and 2 above on a medium customarily used for
software interchange; or,
c) Accompany it with the information you received as to the offer to
distribute corresponding source code. (This alternative is allowed
only for noncommercial distribution and only if you received the
program in object code or executable form with such an offer, in
accord with Subsection b above.)

The source code for a work means the preferred form of the work for making
modifications to it. For an executable work, complete source code means
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definition files, plus the scripts used to control compilation and installation
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If distribution of executable or object code is made by offering access to
copy from a designated place, then offering equivalent access to copy the
source code from the same place counts as distribution of te source code,
even though third parties are not compelled to copy the source along with
the object code.

4. You may not copy, modify, sublicense, or distribute the Program except as
expressly provided under this License. Any attempt otherwise to cop, modify,
sublicense or distribute the Program is void, and will automatically terminate
your rights under this License. However, parties who have received copies,
or rights, from you under this License will not have their licenses terminated
so long as such parties remain in full compliance.
Appendix

ASUS Wireless Router 103

Appendix - GNU General Public License
5. You are not required to accept this License, since you have not signed it.
However, nothing else grants you permission to modify or distribute the
Program or its derivative works. These actions are prohibited by law if you
do not accept this License. Therefore, by modifying or distributing the
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6. Each time you redistribute the Program (or any work based on the Program),
the recipient automatically receives a license from the original licensor to
copy, distribute or modify the Program subject to these terms and conditions.
You may not impose any further restrictions on the recipients’ exercise of
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7. If, as a consequence of a court judgment or allegation of patent infringement
or for any other reason (not limited to patent issues), conditions are imposed
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a consequence you may not distribute the Program at all. For example, if a
patent license could not permit royalty-free redistribution of the Program
by all those who receive copies directly or indirectly through you, then the
only way you could satisfy both it and this License would be to refrain
entirely from distribution of the Program.
I any portion of this section is held invalid or unenforceable under any
particular circumstance, the balance of the section is intended to apply and
the section as a whole is intended to apply in other circumstances.
It is not the purpose of this section to induce you to infringe any patents or
other property right claims or to contest validity of any such claims; this
section has the sole purpose of protecting the integrity of the free software
distribution system, which is implemented by public license practices. Many
people have made generous contributions to the wide range of software
distributed through that system in reliance on consistent application of that
system; it is up to the author/donor to decide if he or she is willing to
Appendix

distribute software through any other system and a licensee cannot impose
that choice.

104 ASUS Wireless Router

Appendix - GNU General Public License
This section is intended to make thoroughly clear what is believed to be a
consequence of the rest of this License.

8. If the distribution and/or use of the Program is restricted in certain countries
either by patents or by copyrighted interfaces, the original copyright holder
who places the Program under this License may add an explicit geographical
distribution limitation excluding those countries, so that distribution is
permitted only in or among countries not thus excluded. In such case, this
License incorporates the limitation as if written in the body of this License.

9. The Free Software Foundation may publish revised and/or new versions of
the General Public License from time to time. Such new versions will be
similar in spirit to the present version, but may differ in detail to address
new problems or concerns.
Each version is given a distinguishing version number. If the Program
specifies a version number of his License which applies to it and “any later
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of that version or of any later version published by the Free Software
Foundation. If the Program does not specify a version number of this
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Foundation.

10. If you wish to incorporate parts of the Program into other free programs
whose distribution conditions are different, write to the author to ask for
permission. For software which is copyrighted by the Free Software
Foundation, write to the Free Software Foundation; we sometimes make
exceptions for this. Our decision will be guided by the two goals of
preserving the free status of all derivatives of our free software and of
promoting the sharing and reuse of software generally.
Appendix

ASUS Wireless Router 105

Appendix - GNU General Public License
NO WARRANTY
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE,
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT
PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE
STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER
PARTIES PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
NECESSARY SERVICING, REPAIR OR CORRECTION.

12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR
AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR
ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR
DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL
OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR
INABILITY TO SE THE PROGRAM (INCLUDING BUT NOT
LIMITED TO LOSS OF DATA OR DATA BEING RENDERED
INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH
ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
DAMAGES.

END OF TERMS AND CONDITIONS
Appendix

106 ASUS Wireless Router

Appendix

ASUS Wireless Router 107

Document Created: 2004-10-21 16:47:54
Document Modified: 2004-10-21 16:47:54

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