Buffalo Technology WZR-G240 User Manual

User Manual - AirStation WZR-G240

MIMO 240 Wireless Router

www.buffalotech.com

v. 1.1

Table of Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Basic Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

AOSS Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Manual Client Confi guration . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

AirStation Confi guration Tool . . . . . . . . . . . . . . . . . . . . . . . . 16

Home . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Port Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Firewall . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Windows (MSN) Messenger. . . . . . . . . . . . . . . . . . 19

Encryption . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Wireless Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Firmware Update . . . . . . . . . . . . . . . . . . . . . . . . 22

Internet Connection Reset . . . . . . . . . . . . . . . . . . . . . 23

Advanced Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

WAN Confi guration . . . . . . . . . . . . . . . . . . . . . . . . 25

WAN port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

PPPoE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

LAN Confi guration . . . . . . . . . . . . . . . . . . . . . . . 27

LAN Port . . . . . . . . . . . . . . . . . . . . . . . . 27

2

Table of Contents

DHCP Server . . . . . . . . . . . . . . . . . . . . . 28

Manual Assignment of IP Address . . . 29

Network Confi guration. . . . . . . . . . . . . . . . . . . . . 30

Route information . . . . . . . . . . . . . . . . . . . . 30

Address Translation . . . . . . . . . . . . . . . . 32

IP Filter . . . . . . . . . . . . . . . . . . . . . . 34

Intrusion Detector . . . . . . . . . . . . . . . . . 37

UPnP . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Wireless Confi guration . . . . . . . . . . . . . . . . . . . . . . . . 39

AOSS. . . . . . . . . . . . . . . . . . . . . . . . . 39

802.11g . . . . . . . . . . . . . . . . . . . . . . 40

Basic . . . . . . . . . . . . . . . . . . . . . . 40

Security . . . . . . . . . . . . . . . . . 41

MAC access limit . . . . . . . . . . . . . . . . . . . . . . . . 42

Admin Confi guration . . . . . . . . . . . . . . . . . . . 44

Password . . . . . . . . . . . . . . . . . . . 44

Date/NTP . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

3

Table of Contents

Syslog Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Save/Load Confi guration . . . . . . . . . . . . 47

Initialize/Reboot . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Firmware Update. . . . . . . . . . . . . . . . . . . . . . 49

Diagnostic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

System Information. . . . . . . . . . . . . . . . . . . . . . 50

Log Info. . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Packets Info. . . . . . . . . . . . . . . . . . . . . . 52

Client Monitor. . . . . . . . . . . . . . . . . . . . . . 53

Ping Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Connecting to an existing network. . . . . . . . . . . . . . . . . . . . . . 55

Antenna. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Specifi cations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

FCC Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Warranty Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

4

Introduction

Congratulations on your purchase! The AirStation WZR-G240 MIMO Router uses multiple antennas

and Airgo Gen-3 MIMO (Multiple In, Multiple Out) technology to give you a faster, more reliable
wireless network. The WZR-G240 also includes AOSS™, allowing you to set up a secure wireless net­work in minutes. The AirStation MIMO WZR-G240 is a great router and access point for multimedia
streaming and other applications where performance and data integrity are crucial.

System Requirements

A high-speed (Broadband) Internet connection or existing local area connection.

•

• A computer with a network connection (wired or wireless) and a good web browser. The

screenshots in this manual were taken with Firefox, but Netscape and Internet Explorer
are also supported in versions 4.5 or later, and Safari 1.0 and later are supported with
Macintosh OS X 10.2 and later.

AirStation WZR-G240 Package Contents

The AirStation WZR-G240 package contains the following items:

• WZR-G240 Base Station

• AC adapter and power cable

• CAT5 LAN cable

• Utility CD with Manual

• Quick Setup Guides

• Warranty Statement

5

Basic Setup

Begin by fi nding a good place to set up your router/access point. Some things to

consider:

• You’ll need to be able to plug your internet connection into it, so it should go within

reach of the LAN cable from your DSL or Cable modem. You’ll also want a power outlet
nearby.

• Keep the access point as central in your work area as possible. Signal strength and

speed fall off with distance.

• Higher is often better. For instance, set it up on the top shelf of a bookcase rather than

the bottom one, if possible.

• Buffalo Technology recommends leaving the three antennas in their upright positions.

6

Getting Ready

Make note of the AirStation’s wired MAC address. The LAN

or wired MAC address is the default SSID (wireless network
name) of the AirStation. You can find it on the bottom of the
AirStation.

You may also wish to contact your ISP to ask if other
information, such as global IP address, subnet mask address,
default gateway address, DNS server address, or PPPoE
parameters, is necessary to access your internet connection.
Write down any necessary information that your ISP requires
for connection.

Buffalo recommends using a wired network connection, where your computer is physically
connected to the AirStation with a CAT5 straight cable plugged into one of the four LAN
ports, to initially set up your router. This will avoid possible confi guration problems with
the wireless adapter on the computer being used to confi gure the AirStation.

The computer used to confi gure the AirStation should be set to obtain an IP address
automatically using a DHCP server. The WZR-G240 has a default LAN IP address of

192.168.11.1 and Subnet Mask of 255.255.255.0.

7

Connecting your AirStation

1. Power down the Cable or DSL modem and the

computer which will be used to confi gure the
AirStation router.

2. Plug the Cable or DSL’s LAN Ethernet cable into the
AirStation’s WAN port. Initially, you may need to
unplug this cable from your computer, hub or other
router.

3. Plug the provided Ethernet cable into a LAN port
on the AirStation and plug the other end into your
computer’s Ethernet adapter (NIC). If you plan
to initially confi gure the AirStation wirelessly (not
recommended), you may skip this step.

4. Power on your cable or DSL modem and wait one full
minute, then power on the AirStation router and wait
one full minute, and fi nally, power on the computer
which will be used to confi gure the AirStation.

Power

WAN Port

LAN Ports

8

Log in to the Confi guration Tool

Launch a web browser on the computer that you’re

going to use to confi gure the AirStation.

Enter 192.168.11.1 into the URL fi eld. Naturally, if you
change your AirStation’s IP address, you’ll have to enter
the new address instead.

A window will open, prompting you to enter a User Name
and Password.

Enter root as the User Name and leave the password
fi eld blank.

9

Detecting Your Broadband Connection

Your AirStation’s SmartRouter technology will determine the type of internet

connection you have automatically, and ask you for any needed information. If
your ISP assigns IPs automatically (most cable providers do), their DHCP server
will give your router an IP address. If additional login information is required
to connect to the internet, the wizard will ask for it. Enter any required login

information if asked. Contact your DSL
provider for any missing login information.

If your DSL provider requires that PPPoE
information be entered manually, see page

25.

10

Home

This is the opening page of your
AirStation’s confi guration tool. You
can always get to it from within the
confi guration screens by clicking on

Home. From here, you can confi gure
port mapping for your internet games,
turn on UPnP for Windows (MSN)
Messenger, confi gure your Firewall,
setup Encryption, choose your Wireless
channel, update your AirStation’s

fi rmware, and reset your Internet
connection’s confi guration. As you
explore the confi guration tool, you can

usually get context sensitive help by clicking on the Help link at the top right of
the page.

To go to Advanced Settings (page 25), click on the Advanced tab. To get the
system information you need to set up a wireless client that doesn’t support
AOSS, click on the System Info tab. See page 17 for more on Home.

11

AOSS

AOSS

AOSS (AirStation One-Touch Secure
System) is a simple system for confi guring
your wireless network securely. If your
router and your client device are powered
on and both support AOSS, then making a
secure wireless connection is very easy.

First, push the AOSS button on the back of
your router and hold it in for one second.
The AOSS light will begin to fl ash. Let go
of the AOSS button. You now have two
minutes to push the AOSS button on your
client device and fi nish the connection.

Second, push the AOSS button on your client device. Check your client device’s
documentation for the location of its AOSS button.

After you’ve pressed both buttons, it will take about 15 seconds for the connection to
complete. When it’s fi nished, the AOSS light will glow a solid amber. You now have a
secure network connection!

If you’ve already connected your AirStation to the Internet (page 10), your client devices will
now be able to access the internet as well.

12

AOSS Notes

Some things to keep in mind with AOSS

The AOSS button is also the INIT button. Don’t hold the button down too long!

•

One second is suffi cient. If you hold the button down for 5 seconds or more, AOSS
will cease and the WZR-G240 will initialize all settings. You’ll then have to restart
confi guration from the beginning.

• Many AOSS clients have their AOSS button in software. If your client device doesn’t

have a visible AOSS button, look in its client software, or consult its documentation.

• AOSS connects your wireless clients to your access point. It doesn’t set up your

internet connection for you. To connect to the internet, you may still have to run your
router confi guration utility, even if you are using AOSS.

• Only one AOSS wireless client adapter can be confi gured with the AOSS router at a

time. The AOSS button will need to be re-pressed to connect each additional AOSS
wireless client.

• It is not necessary to AOSS client devices that have already been confi gured via AOSS,

unless signifi cant changes have been made to the wireless network.

• Do not attempt to confi gure two separate AOSS networks at the same time, as it may

cause undesired confi gurations.

• If an undesired client has connected via AOSS, it can be disconnected from within the

WZR-G240’s advanced confi guration menus.

13

Manual Client Confi guration

If your wireless client doesn’t support
AOSS, you’ll have to confi gure it
manually. From the Home page, click
on the System Info tab.

14

System Information Page

This page gives you all the

information you might need to
confi gure your non-AOSS wireless
client. Probably you’ll just need
the SSID, encryption type, and
encryption key (password). Consult
your wireless client’s documentation
for more information on confi guring
it if necessary.

You can get here from Home by
clicking the System Info tab.

15

AirStation Confi guration Tool (Home)

When you fi rst open your AirStation

Confi guration Tool, it will take you to Home
(see also page 11). From Home, you can
confi gure port mapping for your internet
games, set UPnP for Windows (MSN)

Messenger, confi gure your fi rewall, setup
encryption, choose your wireless channel,

update your AirStation’s fi rmware, and reset
your Internet Connection’s confi guration.
Clicking the Advanced tab gives you access
to all of the AirStation’s confi guration tools.

You can get back to Home from anywhere
in the management tool by clicking on the
Home button at the top left of the screen.

Let’s begin exploring advanced settings by
clicking on Internet Games (Port Mapping).

16

Internet Games (Port Mapping)

Select any ports that need to be
opened for your internet games to
function correctly. Consult your
game’s documentation for more
information on what ports need to be
confi gured.

17

Windows (MSN) Messinger/UPnP

Windows (MSN) Messinger requires
UPnP for proper operation. You may
Enable UPnP here. UPnP may need to be
confi gured on your PC as well.

If you need to confi gure UPnP on your PC,
the links at the bottom of the page have
instructions for doing so on Windows ME
and XP computers.

Get to this page from Home by clicking on
Windows (MSN) Messinger.

18

Firewall/Intrusion Detector

From this page, choose the level of fi rewall
security you desire. You may also choose
to have alerts sent to a different PC, if you
like. Click Next when done to restart the
router.

Get to this page from Home by clicking on

Firewall/Intrusion Detector.

19

Wireless Encryption

This page is available from Home by selecting
Wireless Encryption. Here, you can manually

select the type of wireless encryption you’d
like to use. Your AirStation supports three
different encryption schemes; choose the best
one that all your clients support.

Virtually all wireless clients support WEP. It’s
a lot better than nothing.

TKIP is much more secure than WEP, but
slower.

AES is even more secure than TKIP, and the
fastest of all. Highly recommended if all of
your wireless clients support it.

20

Wireless Channel

This page is available from Home by selecting
Wireless channel. With Auto Channel selected,

your AirStation will choose the best channel
available. Current channel will show the channel
that your AirStation is currently using.

You may also select any channel from 1-11
manually. Channels 1, 6, and 11 are non­overlapping. If multiple channels are in use
in an area, select a different channel for your
AirStation, as far away from the other channels
being used as possible.

Channel Expansion reduces wireless overhead,
giving your network faster throughput for clients
that support it. If enabled, choose an Expansion
Channel either 4 higher or 4 lower than your
main 802.11g channel.

21

Firmware Update

This page is available from Home
by selecting Firmware update. Use
Browse to select your fi rmware
update fi le, and then click on Apply.
Firmware update may take several
minutes to complete. Don’t power
down your AirStation until the diag
LED has gone out.

22

Internet Connection Wizard (Multisession Reset)

From Home, selecting the Internet
Connection Wizard (Multisession Reset)

tab will begin the Internet Connection
Wizard.

The Internet Connection Wizard will
only function correctly in simple
networks, where your cable or DSL
modem is plugged directly into your
AirStation’s WAN port. If you have
a complicated existing network that
you’re adding the AirStation to, see
page 56.

23

Advanced Settings

Advanced Settings lets you confi gure
every element of your AirStation. Get
to Advanced Settings from Home by
clicking the Advanced Tab.

Click Help in the top right corner for
more information about any of the
pages in Advanced Settings.

To begin, click on WAN Confi g. The
fi rst page in WAN Confi g, WAN Port,
will open.

24

WAN Confi g (WAN Port)

Here, you may choose how the AirStation
acquires an IP address. Normally, the
internet connection wizard will set this for
you if you have a cablemodem or DSL. If
you’re not sure what to choose, perform
Easy Setup.

To setup PPPoE manually, click on click
here and turn to page 27.

Also on this page, under Advanced
Settings, you may manually set the Default
Gateway, DNS server, WAN MAC address,
WAN format, and WEB port number.

Click Apply when fi nished.

25

PPPoE

Many DSL connections require a PPPoE
connection in order to log in to an internet
connection. Normally, the Easy Detection
Wizard will help you confi gure that, but
you may manually confi gure one here.
Consult your ISP for more information
on correctly confi guring your PPPoE
connection.

To add a new PPPoE connection, click Edit
Connection List. To choose your preferred
connection, click on Edit Preferred
Connection List.

26

LAN Confi g (LAN Port)

Default for the LAN side IP address is

192.168.11.1. To add the AirStation to an
existing LAN, specify a unique IPaddress, not
used elsewhere in the network.

The default Subnet Mask is 255.255.255.0.
To connect AirStation to an existing LAN,
specify the Subnet Mask that the LAN uses.

If there’s more than one DHCP server on
a network, disable all but one of them.
To have DHCP assign addresses from a
specifi c range, enter a begining address by
Assigned IP Address and give the number

of addresses to assign in the Addresses box. To exclude specifi c addresses from being
assigned by DHCP, specify them in the Excluded IP Address box. Multiple IP addresses
may be specifi ed by seperating them with a comma, e.g. 192.168.11.7,192.168.11.9. You
can also specify an IP address range by start and end address connected by a dash, e.g.

192.168.11.15-192.168.11.21. The ‘,’ and ‘-’ can be used at the same time, e.g. 192.1

68.11.7,192.168.11.9,192.168.11.15-192.168.11.21, up to a total string length of 128
characters.

Click the Help link in the top right corner for more information.

27

Advanced DHCP Settings

This page offers the same DHCP settings as
the previous one, and in addition, offers you
the chance to change the Lease Period, De-

fault Gateway, DNS servers, WINS server, and
Domain Name. Click Apply when you have

the settings the way you want them.

To manually assign an IP address, click
Manual Assignment.

28

DHCP Server (Manual Assignment of IP Address)

To manually link a LAN address to a MAC
address, enter them under Add Client Infor-

mation and click Add.

Current DHCP Client Information shows

all LAN addresses currently assigned by
AirStation’s DHCP. You may confi gure a
specifi c client to always recieve the same
IP address by clicking Manual Assignment
to the right of its MAC Address. Clicking
Delete returns a manually assigned client
to normal DHCP operation. Edit allows
you to manually adjust a linked IP Address
and Mac Address in the Client Information
window above.

29

Network Confi g (Route Info)

By default, the AirStation receives RIP
(Route Information Protocol) information
only from your local network, and
doesn’t broadcast RIP at all. For large,
complicated network confi gurations,
you may wish to modify this behavior.
Click Apply when you have your desired
confi guration.

Lower on the page, routing information
is displayed. Click Edit Routing
Information to add a new route
manually.

30

Network Confi guration (Edit Routing Information)

To confi gure a route manually, enter its
destination address and gateway. Enter
a maximum number of hops allowable in
Metric and click Add.

31

NAT

You may disable Network Address
Translation and IPsec passthrough by
unchecking the appropriate Enable boxes.
If you have a DMZ, enter its IP address
in the IP Address of DMZ box. Incoming
packets containing no recognizable
destination port information will be
redirected to the DMZ’s IP address.

Click Apply when done.

To set a NAT table entry manually, click
Edit NAT Table.

32

NAT (Manual Entry)

From this page you may manually add
entries into the Address Translation
Table. Click Add New Group when each is
complete.

33

IP Filter

Your AirStation comes pre-confi gured
with basic rules. You may choose which
of these to use by clicking on Add/Delete
Basic Rules and turning to page 36.

To make a custom rule, click on Confi gure
IP Filter (page 37).

34

IP Filter (Add/Delete Basic Rules)

Get here by clicking on Add/Delete Basic
Rules (see page 35). You may choose which

of AirStation’s preconfi gured basic rules
are enabled or disabled. Active rules are
displayed with a green background, and
disabled rules are shown in red. Choose
the rules you want to use by clicking under
Operation. When your choices are complete,
click on Initialize.

35

IP Filter (Confi gure IP Filter)

Clicking on Confi gure IP Filter from the IP
fi lter page (page 35) will bring you to this
page, where you can make your own rules.
Click Add Rule when you have each rule
confi gured the way you want it.

36

Network Confi guration (Intrusion Detector)

To enable intrusion detector, choose
Enable or Enable (Apply packet fi lter rules)
from the Intrusion Detector drop-down
box. If packet fi lter rules are applied,
packets will be fi ltered with packet fi lter
rules before Intrusion Detector is applied.

Blocking IP spoofi ng blocks packets from
devices using an IP address that is not
their own.

In the Threshold Value box, enter the
number of times an event has to occur
before you receive notifi cation.

To confi gure your email alerts, enter your
email address and mail server information.
You may make up a sender email address,

such as “[e-mail]”. Alert emails will appear to come from this address.

Intrusion detector also blocks unauthorized access attempts and suspicious traffi c from
WAN-side devices (the Internet).

37

UPnP

You may disable Universal Plug and
Play functionality by unchecking
Enable here. Note that Windows (MSN)
Messenger will not function correctly
with UPnP disabled.

Buffalo Technology recommends
leaving this feature enabled as many
internet applications are beginning to
utilize UPnP technology.

38

AOSS

Clicking Start AOSS Sequence has the same
function as pushing the AOSS button on the
router: it initiates the AOSS process.

If all your clients support AOSS, it’s very
simple to set them up. Press the AOSS
button on the router, or the one on this
page, and then push the AOSS button on
the client device.

Each client device will have to be set up
seperately. Wait for each AOSS process to
fi nish before starting the next one.

Consult your client device’s documentation
for the location of its AOSS button.

39

802.11g (Basic)

If you have a mixed mode network,
with both 802.11b and 802.11g clients,
it’s recommended that you check 11g
protection to ensure that slower 11b
clients don’t hog all available bandwidth.

Only change the Multicast Rate and
DTIM settings if told to do so by your
Internet provider.

Channel Expansion reduces wireless
overhead by taking advantage of
additional channels for network traffi c
management, giving your network an
overall increase in data throughput
for clients that support it. If enabled,
choose an Expansion Channel either
4 higher or 4 lower than your main

802.11g channel. NOTE: This feature
must be enabled and confi gured
properly for maximum throughput to be
achieved.

40

802.11g (Security)

Buffalo recommends that you choose
the strongest form of encryption that’s
supported by all your client devices.

• WEP is a lot better than nothing, and
almost every wireless device ever made
supports it.

• TKIP is slower than WEP but much more
secure.

• AES is the most secure of all, and the
quickest as well. Use it if you can.

Setting the key renewal period too short
can decrease network performance.

By default, the AirStation broadcasts its SSID. This makes it easier to have a client
connect to the AirStation. To disable broadcasting, uncheck this box.

Privacy Seperator prevents wireless clients from being able to browse each other’s
computers. Check Enable to turn it on.

41

MAC Access Limit

You may limit access to your wireless
network to specifi c computers.
Computers not listed on your MAC
Registration List will not be able to
connect to the network. If you enable
this, click Edit Registration List to add
MAC addresses to your registration
list.

42

MAC Access Limit (Edit Registration List)

Advanced Settings

Enter a MAC address and click Apply
for each client that’s going to be
accessing the network.

43

Admin Confi guration (Name/Password)

Here, you can change your AirStation’s
name on your network and the
administrator password. The name of
the administrator account is fi xed as
“root”. If you have many AirStations on
your network, having clear, descriptive
names for each can make them much
easier to administrate.

44

Admin Confi g (Date/NTP)

You may set the time and date on your
AirStation by entering it manually, and
then clicking Apply.

You may also click Acquire Current
Time from your PC to set time and date
automatically to match the PC you’re
using to set it up.

If you have an NTP time server on your
network, Enable NTP functionality and
enter your NTP Server Name. Choose how
often you want time updated and click
Apply.

If you’re setting time manually, you’ll need
to select your Time Zone and click Apply.

45

Syslog Transfer

If you have a syslog server on your
network, you may send logs to it.
Check Enable to have logs transferred.
Enter the address of your Syslog
Server, check the logs you want
transferred, and click Apply.

46

Save/Load Confi guration

Once your AirStation’s confi gured
the way you want it, you can save
the confi guration here. You’ll need
the current administrator password
to restore the confi guration from the
backup fi le later.

Click Help at the top right corner
of the page for more information on
backing up and recovering system
confi guration fi les.

47

Initialize/Reboot

Click Restart Now to restart your
AirStation. Click Initialize Now to
restore your AirStation to factory
defaults and restart it.

You may also initialize your AirStation
by holding down the AOSS/INIT
button on the rear of the unit for 5
seconds or more.

48

Firmware Update

Click Browse to select your fi rmware
update fi le. Then, click the Firmware
Update button to update fi rmware.

Firmware Update may take several
minutes to complete. Do not power
down the router until Firmware
Update is fi nished and the diag light
on the front of the router has stopped
blinking.

When available, updated fi rmware
may be downloaded from
www.buffalotech.com.

49

System Information

The System Information page lists all the
setup information for your AirStation.
It can be very handy for setting up
clients that don’t support AOSS.

50

Log Information

Here you can choose what information
gets logged and see recent log entries.

51

Packet Traffi c Information

Here, you can see the packets and
errors for each of your networks.

52

Client Monitor

Client Monitor shows you a list of all
clients currently connected to the
wireless network.

53

Ping Test

To perform a Ping test, enter a target
(such as 192.168.11.2 or www.
buffalotech.com) and click Perform.

Successful pings return “64 bytes
from . . .” messages. If the ping
returns “Connection failed” or other
errors, something is preventing you
from communicating successfully with
your target.

54

Connecting to a Preexisting Network

Add an AirStation without changing your existing LAN confi guration

1. Connect a PC directly to one of the LAN ports on your WZR-G240.

2. Open LAN Settings - LAN Port Settings and confi gure the following settings:

IP Address = (Specify an unused network address from the existing LAN.)

Subnet Mask= (Use the same Subnet Mask as the existing LAN.)

DHCP Server Function=[Disable]

3. Connect a LAN cable from your existing network into one of the WZR-G240’s LAN
ports.

4. Restart the PC used for confi guration.

55

Antennas

The WZR-G240’s three external antennas are not removable. Their design is integral to
proper MIMO performance. Do not attempt to replace these antennas with any other type
as it may adversely affect performance and range.

56

Specifi cations

For more information, FAQ’s, and updates, consult the AirStation website at
http://www.buffalotech.com.

WZR-G240 AirStation Specifi cations

Physical Specifi cations

Dimensions 8.46 x 1.87 x 6.99 in. (215 x 47.5 x 177.6mm)
Weight 1.37 lb. (560g)

Temperature & Humidity

Operation 0˚ to 40˚ C
Maximum humidity 80%
Transit/Storage 0˚ to 40˚ C maximum humidity 80% (no condensation)

Power Characteristics

Transmit Mode 700 mA (Nominal),
Power Supply 12 V output; 100-240V AC Universal, 50/60 Hz
Power Consumption about 6.5 Watts (Max)

57

Specifi cations

Regulatory Information

Wireless communication is often subject to local radio regulations. Although AirStation
wireless networking products have been designed for operation in the license-free 2.4
GHz band, local radio regulations may impose limitations on the use of wireless commu­nication equipment.

Network Compatability

IEEE802.11g/b Standard for wireless LANs; 240* MIMO mode available.

Host Operating System

Wired - CSMD/CD (Collision Detection)
Wireless - CSMD/CA (Collision Avoidance) with Acknowledgment (ACK)

Radio Characteristics

RF Frequency Band 2.4 GHz (2400-2483 MHz)
11 selectable channels (3 non-overlapping)
Modulation Technique Direct Sequence Spread Spectrum

• OFDM for High Transmit Rate

58

Specifi cations

• DQPSK for Standard Transmit Rate

• DBPSK for Low Transmit Rate

Spreading 11-chip Barker Sequence
Transmit Rate:
High Speed 54 Mbps
Medium Speed 36 Mbps
Standard Speed 2 Mbps
Low Speed 1 Mbps
*MIMO speeds available

Receiver Sensitivity -83 dBm -87 dBm -91 dBm -94 dBm (depends on data rate)

Delay Spread (at FER of <1%) 65 ns 225 ns 400 ns 500 ns (depends on data rate)

• The range of wireless devices can be affected by metal surfaces, solid high-density
materials and obstacles in the signal path.

AirStation IEEE 802.11 Channel Sets

The range of the wireless signal is related to the Transmit Rate of the wireless
communication. Communications at a lower Transmit range may travel longer distances.

Center Channel ID FCC

1 2412 2 2417 3 2422 4 2427 5 2432 6 2437 7 2442 8 2447 9 2452 10 2457
11 2462 11 default channel

59

Troubleshooting

Common Problems

• Out of range, client cannot connect to the AirStation.

• Confi guration mismatch, client cannot connect to the AirStation.

• Absence or confl ict with the Client Driver.

• Confl ict of another device with the AirStation hardware.

LED Activity

Monitoring LED activity helps identify problems.

• Power LED should be Green,

• Wireless LED should be Green if the line is active. If is it blinking Green, wireless
communication is active.

• LAN LED should be lit while communication is active for the port.

• The red Diag LED will fl ash during boot and fi rmware updates.

• The amber AOSS LED will glow while AOSS is in use.

DIAG LED Activity

Unplug the power for three seconds. Plug the power back in to monitor the LEDs during
startup.

60

Troubleshooting

DIAG LED Activity Table

DIAG LED Display Time Description/Action

Continuous Red Starting RAM Error Red fl ash, 2 times Starting Flash

Red fl ash, 3 times Starting A problem on the wired LAN side

Red fl ash, 4 times Starting A problem on the wireless LAN side

LEDs Work But Client PC Cannot Connect to Network

If the LEDs indicate that the network is working properly (Power LED is on, Transmit/
Receive LED blinks), check your network’s TCP/IP settings.

Changing Client TCP/IP Settings in Windows

Consult the LAN Administrator for correct TCP/IP settings.

To add or change TCP/IP Settings:

1. On the Windows task bar, click Start.

2. Select Settings, then Control Panel.

3. Double-click on the Network icon to view Network Properties.

4. From the list of installed components, verify the TCP/IP => wireless LAN adapter
protocol is installed.

ROM Error

61

Troubleshooting

• If the wireless adapter protocol is not yet installed, click the Add button and select
the TCP/IP protocol from the list. Refer to Windows Help for more information.

• If the wireless adapter protocol is installed, select the protocol and click the
Properties button. Verify that the parameters match the settings provided by your
LAN Administrator. Make changes if necessary, and click OK.

5. If prompted, restart your computer.

Other Problems

Please refer to www.buffalotech.com for further reference materials.

62

Glossary

10BaseT: 802.3 based Ethernet network
that uses UTP (Unshielded twisted pair)
cable and a star topology. 10 Mbps data
transmission speed.

100BaseT: 802.3 based Ethernet network
that uses UTP (Unshielded twisted pair)
cable and a star topology. 100 Mbps data
transmission speed.

1000BaseT: 802.3 based Ethernet
network that uses UTP (Unshielded twisted
pair) cable and a star topology. 1000 Mbps
data transmission speed.

802.1x: The standard for wireless LAN
authentication used between an AP and a
client. 802.1x with EAP will initiate key
handling.

Access Point: A hardware device that acts
as a communication hub for Clients (users
of wireless devices) to connect to a wired
LAN.

Ad-Hoc Network: A network based on
peer-to-peer communication rather than a
router, switch, or hub.

Bandwidth: The transmission capacity of
a computer or a communication channel,
usually stated in Megabits per second
(Mbps).

Bridge: A device which forwards traffi c
between network segments with a common
network layer address, based on data link
layer information.

Client: A PC, workstation, or other device
that connects to a network wirelessly
through an Access Point.

Cross-Over Cable: A UTP cable that has its
transmit and receive pair crossed to allow
communications between two devices.

Default Gateway: The IP Address of either
the nearest router or server for the LAN.

63

Glossary

Destination Address: The address portion
of a packet that identifi es the intended
recipient station.

DHCP (Dynamic Host Confi guration
Protocol): Based on BOOTP, it uses a pool

of IP addresses, which it assigns to each
device connected to it, and retrieves the
address when the device becomes dormant
for a period of time.

DNS (Domain Name System): System
used to map readable machine names into
IP addresses.

Driver: Software that interfaces a
computer with a specifi c hardware device.

Dynamic IP Address: An IP address that
is automatically assigned to a client station
in a TCP/IP network, typically by a DHCP
server.

Ethernet: The most widely used
architecture for Local Area Networks
(LANs). It is a shared-media network
architecture. The IEEE 802.3 standard
details its functionality.

Ethernet cable: A wire similar to telephone
cable that carries signals between Ethernet
devices. It is designed to connect a single
device’s NIC to a router, switch, or hub.
See also Crossover cable.

File and Print Sharing: A Microsoft
application that allows computers on a
network to share fi les and printers.

Firmware: Computer programming
instructions that are stored in a read­only memory unit rather than being
implemented through software.

Frame: A fi xed block of data, transmitted
as a single entity. Also referred to as a
packet.

64

Glossary

Full-Duplex: To transmit on the same
channel in both directions simultaneously.

Half-duplex: To transmit on the same
channel in both directions, one direction at
a time.

Hub: A device which allows connection
of computers and other devices to form a
LAN.

IEEE (Institute of Electrical and
Electronics Engineers): The professional

organization which promotes development
of electronics technology.

IP (Internet Protocol) Address: A unique
32-binary-digit number that identifi es each
sender or receiver of information sent in
packets.

Infrastructure: A wireless network or
other small network in which the wireless
network devices are made a part of the
network through the Access Point.

ISP (Internet Service Provider): A
company that provides access to the
Internet and other related services.

IV (Initialization Vector): The header
section of an encrypted message packet.

LAN (Local Area Network): A group
of computers and peripheral devices
connected to share resources.

LED (Light Emitting Diode): The lights
on a hardware device representing the
activity through the ports.

MAC (Medium Access Control) Address:
The unique number that distinguishes
every network interface card.

Mbps (Mega Bits Per Second): A
measurement of millions of bits per
second.

MDI/X (Media Dependent Interface/
Cross-over): Port on a network hub or

switch that crosses the incoming transmit
lines with the outgoing receive lines.

65

Glossary

MHz (MegaHertz): One million cycles per
second.

NAT (Network Address Translation): An
internet standard that enables a LAN to
use one set of IP addresses for internal
traffi c and a second set for external traffi c.

NIC (Network Interface Card): An
expansion card connected to a computer
so the computer can be connected to a
network.

Packet: A block of data that is transferred
as a single unit, also called a frame or a
block.

Packet Filtering: Discarding unwanted
network traffi c based on its originating
address or its type.

PCI (Peripheral Component
Interconnect): A bus that is connected

directly to the CPU.

PCMCIA (Personal Computer Memory Card
International Association) Card: Removable

module that adds features to a portable
computer.

Peer-to-peer: This simple network is formed by
connecting computers directly, without use of
routers or hubs. A crossover cable is plugged
into an Ethernet port in each computer,
connecting them directly.

Ping (Packet Internet Groper): An Internet
utility used to determine whether a particular
IP address is accessable.

Plug and Play: Hardware that, once physically
installed, fi nishes its installation automatically
and may immediately be used, as opposed
to hardware that requires further manual
confi guration.

PoE (Power over Ethernet): A mechanism
to send DC power to a device using a CAT5
Ethernet cable.

66

Glossary

PPPoE (Point-to-Point Protocol over
Ethernet): A specifi cation for connecting

users on an Ethernet line to the Internet
through a common broadband medium.

Protocol: A standard way of exchanging
information between computers.

RADIUS (Remote Authentication Dial
In User Service): A server that issues

authentication keys to clients.

RAM (Random Access Memory): Non­permanent memory.

Repeater Hub: A device that collects,
strengthens and transmits information to
all connected devices, allowing the network
to be extended to accommodate additional
workstations. See also Bridge.

RC4: The encryption algorithm used by
WEP.

RJ-45 connector: An 8-pin connector
used between a twisted pair cable and a
data transmission device.

ROM (Read Only Memory): Memory
hardware that allows fast access to
permanently stored data but prevents
addition to or modifi cation of the data.

Router: A device in a network that
handles message transfer between
computers. Similar to a hub, but with
added functionality and effi ciency.

Roaming: The ability to use a wireless
device while moving from one access point
to another without losing the connection.

Server: Any computer that makes fi les or
peripheral devices available to users of the
network and has a resident Network OS.

SMTP (Simple Mail Transfer Protocol):
The protocol used to defi ne and deliver
electronic mail (E-mail) from one location
to another.

67

Glossary

SNMP (Simple Network Management
Protocol: An application layer protocol

that outlines the formal structure for
communication among network devices.

Static IP Address: A permanent IP
address is assigned to a node in a TCP/IP
network. Also known as global IP.

STP (Shielded Twisted Pair): Twisted Pair
cable wrapped in a metal sheath to provide
extra protection from external interfering
signals.

Subnet Mask: An eight-byte address
divided into 4 parts separated by periods.

TCP/IP (Transmission Control Protocol/
Internet Protocol: Protocol used by

computers when communicating across
the Internet or Intranet.

TKIP (Temporal Key Integrity Protocol):
An encryption method replacing WEP.
TKIP uses random IV and frequent key
exchanges.

Topology: The shape of a LAN (Local Area
Network) or other communications system.

Twisted Pair: Cable that comprises 2
or more pair of insulated wires twisted
together.

UDP (User Datagram Protocol): A
communication method (protocol)
that offers a limited amount of service
when messages are exchanged between
computers in a network. UDP is used as
an alternative to TCP/IP.

Uplink: Link to the next level up in a
communication hierarchy.

UTP (Unshielded Twisted Pair) cable:
Two or more unshielded wires twisted
together to form a cable.

WAN (Wide Area Network): A networking
system covering a wide geographical area.

68

Glossary

WEP (Wired Equivalent Privacy): A
security protocol for wireless local area
networks defi ned in the 802.11b standard,
using a 64 bit or 128 bit key. WEP was
designed to provide the same level of
security as that of a wired LAN. However, it
has been found that WEP is not as secure
as once believed.

Web Browser: A software program that
allows viewing of web pages.

Wi-Fi (Wireless Fidelity): An organization
that tests and assures interoperability
among WLAN devices.

Wire Speed: The maximum speed at
which a given packet can be transferred
using Ethernet and Fast Ethernet standard
specifi cations.

WLAN (Wireless LAN): A LAN topology
using wireless devices.

VPN (Virtual Private Network): A security
method to connect remote LAN users to a
corporate LAN system.

69

FCC / CE Information

Notice

This equipment has been tested and found to comply with the limits for a Class B digital
device, 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 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.

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.

FCC Warning

Changes or modifications not expressly approved by the party responsible for compliance
could void the user’s authority to operate the equipment.

FCC RF Radiation Exposure Statement

This equipment complies with FCC radiation exposure limits set forth for uncontrolled
equipment and meets the FCC radio frequency (RF) Exposure Guidelines in Supplement C

70

FCC / CE Information

to OET65. This equipment should be installed and operated with at least 20cm and more
between the radiator and person’s body (excluding extremities: hands, wrists, feet and
legs).

This transmitter must not be co-located or operating in conjunction with any other antenna
or transmitter. BUFFALO declares that WZR-G240 is limited in CH1~11 by specified firmware
controlled in the USA.

Safety

This equipment is designed with the utmost care for the safety of those who install and
use it. However, special attention must be paid to the dangers of electric shock and static
electricity when working with electrical equipment. All guidelines of this manual and of the
computer manufacturer must therefore be allowed at all times to ensure the safe use of
the equipment.

EU Countries intended for use

The ETSI version of this device is intended for home and office use in Austria, Belgium,
Denmark, Finland, France (with Frequency channel restrictions), Germany, Greece, Iceland,
Ireland, Italy, Luxembourg, Norway, The Netherlands, Portugal, Spain, Sweden, Switzerland
and United Kingdom. The ETSI version of this device is also authorized for use in EFTA

member states Iceland, Liechtenstein, Norway and Switzerland.

EU Countries Not intended for use

None.

Potential restrictive use

France: Only channels 10,11,12, and 13.

71

Warranty Information

Buffalo Technology (Melco Inc.) products come with a two-year limited warranty from the

date of purchase. Buffalo Technology (Melco Inc.) warrants to the original purchaser the
product; good operating condition for the warranty period. This warranty does not include
non-Buffalo Technology (Melco Inc.) installed components. If the Buffalo product malfunctions
during the warranty period, Buffalo Technology/(Melco Inc.) will, replace the unit, provided
the unit has not been subjected to misuse, abuse, or non-Buffalo Technology/(Melco Inc.)
authorized alteration, modifi cations or repair.

All expressed and implied warranties for the Buffalo Technology (Melco Inc) product line
including, but not limited to, the warranties of merchantability and fi tness of a particular
purpose are limited in duration to the above period.

Under no circumstances shall Buffalo Technology/(Melco Inc.) be liable in any way to the
user for damages, including any lost profi ts, lost savings or other incidental or consequential
damages arising out of the use of, or inability to use the Buffalo products.

In no event shall Buffalo Technology/(Melco Inc.) liability exceed the price paid for the product
from direct, indirect, special, incidental, or consequential damages resulting from the use of
the product, its accompanying software, or its documentation. Buffalo Technology/(Melco
Inc.) does not offer refunds for any product.

© 2003-2005 Buffalo Technology (Melco, Inc.)

72

Contact Information

Buffalo Technology (USA), Inc.
4030 West Braker Lane, Suite 120
Austin, TX 78759-5319

GENERAL INQUIRIES

Monday through Friday
8:30am-5:30pm CST
Direct: 512-794-8533 | Toll-free: 800-456-9799 | Fax: [phone] | Email:

[e-mail]

TECHNICAL SUPPORT

North American Technical Support by phone is available 24 hours a day, 7 days a week.
(USA and Canada).
Toll-free: [phone] | Email: [e-mail]

73

Contact Information

Buffalo Technology (Europe), Inc.
176 Buckingham Avenue,
Slough, Berkshire, SL1 4RD
United Kingdom

GENERAL INQUIRIES

Email: [e-mail]

TECHNICAL SUPPORT

Technical Support in Europe is available between the hours of 9am-6pm (GMT) Monday to
Thursday and 9am-4:30pm (GMT) Friday for this product. Customers in Europe can obtain
Technical Support using the following information:

E-mail: [e-mail] | Web: www.buffalo-technology.com

74