GRE GINA User manual

GRE AMERICA, INC
Wireless LAN Access Point/Bridge

Table of Contents
FCC Warning Information
Chapter 1 Introduction
1.1 Package Contents 1
1.2 Features 1
1.3 System Requirement 1
Chapter 2 Connecting the Wireless Bridge to Your Network 2
Chapter 3 Configuring the Wireless Point 2
Chapter 4 Installing the USB Drivers for the Wireless Bridge 2
4.1 Installing the Driver software for Windows 98 2
4.2 Installing the Driver Software for Windows Millennium 3
4.3 Installing the Driver Software for Windows 2000 3
Chapter 5 Wireless Bridge Point Utility 3
5.1 Install AP Utility 4
5.2 Configuring the Wireless Bridge with USB Port / AP Utility 4
5.3 Configuring the Wireless Bridge with Ethernet Port / SNMP Utility 8
Chapter 6 Wireless Bridge Firmware Upgrade with Ethernet 14
Port / TFTP Client Utility 15
Chapter 7 Application and Note 15
Chapter 8 Q & A 15
Warranty Information
Contact Information

WARNING!!
RADIATION.
RF energy at microwave frequencies is present with this equipment.
Personnel should not be exposed to high RF energies, and should not
be in front of the antenna when the equipment is switched on.
All accessible RF connections must be terminated when the radio is
powered on.
The radio should not be powered on with any of its covers removed.
INFORMATION TO USERS.
"Any changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to operate
the equipment."
ANTENNA WARNING
EACH INDIVIDUAL ANTENNA USED FOR THIS TRASNMITTER
MUST BE INSTALLED TO PROVIDE A MINIMUM SEPARATION
DISTANCE OF 20 CM OR MORE FROM ALL PERSONS AND MUST
NOT BE CO-LOCATED WITH ANY OTHER ANTENNA FOR
MEETING RF EXPOSURE REQUIREMENTS.

GRE Wireless LAN GINA Access Point/Bridge User Guide Page 1
Wireless bridge
Chapter 1 Introduction
GINA 2015 is a fully compliant with IEEE802.11b standard wireless LAN/Bridge.
GINA2015 provides not only mobile users to connect to their corporate Ethernet-based LANs, but
also the bridge between two or more wired LAN functions. The GINA2015 wirelessly provides
multiple data access with verity of wired/ wireless LAN in covered propagation range. With the
slick Windows-based user interface designs, corporate IT specialists can easily deploy and
manage Wireless Bridge in their environments.
1.1 Package Contents
The Wireless Bridge includes the following items:
a. Wireless Bridge
b. USB Cable
c. The CD including:
1.Wireless bridge Utility & Driver software
2. User's Manual (this document)
d. Quick Installation Guide
e. * 12 VDC Switching Power Supply
* Caution: You must use the power supply supplied by GRE America, Inc. Failure to
comply with any rules will result in void of warranty support by GRE America, Inc.
1.2 Features
¨ Plug-and-Play installation
¨ Control via USB port
¨ Easy-to-use Windows-based user interfaces for configuration, and monitoring
¨ Firmware upgradeable
¨ Wireless data encryption with 64 and 128 bits encryption for security
¨ Supports RTS threshold control for better throughput
¨ Auto fallback data rate under noisy environment
¨ Supports SNMP utility management

GRE Wireless LAN GINA Access Point/Bridge User Guide Page 2
1.3 System Requirement :
1. Computer with USB support or Ethernet connection
2. Windows 98, Millennium, 2000 Professional
3. Wireless bridge (2)
4. Ethernet Cross Over Cable if connecting Wireless AP/Bridge directly to Ethernet PC
(Optional)
Chapter 2 Connecting the Wireless Bridge to Your Network
1. Locate an optimum location for the Wireless Bridge. The best place for your Wireless bridge
is usually at the center of your wireless network, with line of sight to all of your mobile
stations.
2. Fix the direction of the antenna. Try to place it in a position, which can best cover your
wireless network. Normally, the higher you place the antenna, the better the performance will
be. The antenna's position enhances the receiving sensitivity.
3. Connect an RJ-45 connector to the Wireless Bridge. Then, connect the other end of the
Ethernet cable to a switch or hub. The Wireless Bridge will then be connected to your 10/ 100
Network.
4. Connect the AC Power Adapter to the Wireless Bridge's Power Socket. Only use the power
adapter supplied with the Wireless bridge. Use of a different adapter may result in
product damage.
5. The Hardware Installation is complete.
Chapter 3 Configuring the Wireless Bridge
The Wireless bridge can be configured one of two ways, through the AP/Bridge DFU Utility or the
SNMP Manager.
AP/Bridge DFU Utility
The AP Utility can be used when configuring the Wireless Bridge through a USB connection and
is compatible with Windows 98, Millennium, and 2000.
SNMP Manager
The Wireless Bridge SNMP Manager can be used when configuring the Wireless Bridge through
an Ethernet connection and is compatible with Windows 98, Millennium, and 2000.
DEFAULT SETTINGS:
IP Address : 192.168.0.1
SubNet Mask : 255.255.255.0
ESSID : GINA
Mode: Access Point
Chapter 4 Installing the USB Drivers for the Wireless AP/Bridge
4.1 Installing the Driver Software for Windows 98
1. Windows 98 will automatically identify the Wireless AP/Bridge, once it is connected to the PC,
and prompt you to install the necessary driver. Make sure that the Setup CD is inserted into
your CD-ROM drive and click the Next button on the Add New Hardware Wizard screen to
proceed.

GRE Wireless LAN GINA Access Point/Bridge User Guide Page 3
2. Select Search for the best driver for your device. (Recommended) and click the Next button.
This will search for the Windows 98 driver.
3. Windows will now ask you where to search for the driver software. Select Specify a location
and type in the blank field D:\ Access Point\ DFU\ Driver (where "D" specifies your CD-
ROM).Then, click the Next button.
4. Windows will now search for the driver. After Windows has acknowledged finding the driver,
click the Next button.
5. Windows will now install the driver files. Click the Finish button when completed.
4.2 Installing the Driver Software for Windows Millennium
1. Windows Millennium will automatically identify the Wireless Network Wireless Bridge, once it
is connected to the PC, and prompt you to install the necessary driver. Make sure that the
Setup CD is inserted into your CD-ROM drive.
2. Select Specify the location of the driver (Advanced) and click the Next button. This will search
for the Windows Millennium driver.
3. Windows will now ask you where to search for the driver software. Select Specify a location
and type in the blank field D:\ Access Point\ DFU\ Driver (where "D" specifies your CD-ROM).
Then, click the Next button.
4. Windows will now search for the driver. After Windows has acknowledged finding the driver,
click the Next button.
5. Windows will now install the driver files. Click the Finish button when completed.
4.3 Installing the Driver Software for Windows 2000
1. Windows 2000 will automatically identify the Wireless Network Wireless Bridge, once it is
connected to the PC, and prompt you to install the necessary driver. Make sure that the
Setup CD is inserted into your CD-ROM drive and click the Next button on the Found New
Hardware Wizard screen to proceed.
2. Select Search for a suitable driver for my device (recommended) and click the Next button.
This will search for the Windows 2000 driver.
3. Under "Optional Search Locations", select Specify a location and click the Next button.
4. Windows will now ask you where to search for the driver software. Type in the blank field D:\
Access Point\ DFU\ Driver (where "D" specifies your CD-ROM). Then, click the OK button.
5. Windows will now search for the driver. After Windows has acknowledged finding the driver,
click the Next button.
6. Windows will now install the driver files. Click the Finish button when completed.
Chapter 5 Wireless AP/Bridge DFU Utility
The Wireless AP/Bridge DFU is provided to allow you further customization of the Wireless
Bridge through USB port.

GRE Wireless LAN GINA Access Point/Bridge User Guide Page 4
5.1 Install Wireless Bridge Utility
1. To install the Wireless Bridge Utility, first put the Setup CD into your CD-ROM drive. Then,
click the Windows Start button and select Run from the Start Menu. In the "Open" field, type:
D:\ Access Point\ DFU\ setup. exe. (where "D" specifies your CD-ROM)
2. This will bring up the Welcome screen. After reading this screen, click the Next button to
continue.
3. The Destination screen will show you the default destination chosen by the utility. If you
should want to install this in another location, click the Browse button and select an alternate
destination. When you are ready to continue, click the Next button
4. The next screen will show the Program Folder that the utility will use. If you want to put the
utility in another Program Folder, click an Existing Folder or, if you don't want to run this out of
a Program Folder, delete the Program Folder name. Then, click the Next button to continue.
5. The Utility has now been installed. Then complete installation.
5.2 Configuring the Wireless AP/Bridge with USB Port / AP/Bridge DFU Utility
AP Utility location:
The AP Utility consist of :
1. Code Download (Firmware upgrade) :
2. Utilities (Configuring Wireless Bridge) :
Code Download (Firmware upgrade) :
The Wireless Bridge firmware upgrade can be done through the USB port with AP
Utility.
Caution: You do not need to use this feature unless you have an updated latest AP/Bridge
firmware. Please check at the http://www.greamerica.com website for the latest firmware.

GRE Wireless LAN GINA Access Point/Bridge User Guide Page 5
1. Click " …" button and a dialog box appeared. Select the firmware file, which you want to
upgrade your Wireless Bridge. Then click "Open" button
2. Click "Download" button to process firmware upgrade
3. The AP Utility process firmware upgrade now. Please wait for a moment.
4. Firmware upgrade succeeded.
Utilities (Configuring Wireless AP/Bridge) :
A. Under the window that appears, there are four options:
The "Get" button in order to view the current parameters of the Wireless Bridge
The "Modify" button in order to set new values to the pre-selected parameters
The "Set" button to download any changes to the Wireless Bridge.
The "Exit" button to exit this utility
B. Configuration Settings: Select "Configuration Settings" then click "Get" button. The "Identifier"
and "Value" column display Wireless Bridge's status. From this screen, you can view the
status information and modify the Wireless Bridge status.
•MAC Address: The MAC Address of the Wireless Bridge. Unique 48-bit, hard-coded Media
Access Control address known as the station identifier.
•Regulation Domain: Different Country and region
•Eth_ IP_ Address: The IP Address of the Wireless Bridge. Network-assigned Internet
Protocol address of the Wireless Bridge.

GRE Wireless LAN GINA Access Point/Bridge User Guide Page 6
•Eth_ SubMask: The Ethernet Station and the Wireless Point must be on the same subnet.
The IP address for the Wireless Bridge must correspond to the Subnet Mask. Subnet Mask
consists of four sets of three digits that divide a network into subnetworks.
•Wirel_ ESSID: The ESSID (up to 32 printable ASCII characters) of the unit is a string used to
identify a WLAN. The ID prevents the unintentional merging of two co-located
WLANs.
•ESSID Length: The length of the ESSID (number of characters).
•AutoRateFallBack: Select Enable or Disable. When this is enabled the transmission rate is
defined by the past transmission status.
•Wirel_ Channel: Select the channel to be used. The channels differ from country to country.
•WEP key: The WEP key if the WEP option is enabled in order to activate WEP encryption for
transmissions between the stations and the Wireless Point
•WEP type: The Wired Equivalent Privacy Algorithm (64 or 128 bits)..
•Wire less Fragmentation Threshold: The size at which packets will be fragmented. Choose
a setting within a range of 256 to 2346 bytes. This is the option for the Fragmentation
Threshold activation.
•Wireless RTS Threshold: Minimum packet size to require an RTS (Request To Send). For
packets smaller than this threshold, an RTS is not sent and the packet is transmitted directly
to the WLAN. This is the option for the RTS Threshold activation.
•WEP Keys #1 -#4: The default key that will be used. May be edited only if WEP type is 64
bits.
•Preamble Type: Select Short or Long Preamble Type. Preamble is the first subfield of PDU,
which is the appropriate frame format for transmission to PHY (Physical layer). There are two
options, Short Preamble and Long Preamble. The Short Preamble option improves
throughput performance.
•Authentication Type: Select Open System or Shared Key Authentication Type.
a. Open System:With this setting any station in the WLAN can associate with an Wireless
Bridge and receive and transmit data (null authentication).
b. Shared Key: With this setting only stations using a shared key encryption identified by
the Wireless Bridge are allowed to associate with it.
c. Both: With this setting stations communicate with or without data encryption.
•Access Point Name: Type the Wireless Bridge's name.
•Operational Rate Set: By default the unit adaptively selects the highest possible rate for
transmission. In case of obstacles or interference, the system will step down. Select the basic
rates to be used among the following options: 1 -2 (Mpbs), 1 -2 -5.5 – 11 (Mbps). Select the
Operational Rate set among the following options, 82 84 8B 96 (1 – 2 -5.5 -11 Mbps) or 82 84
0B 16 (1 -2 Mbps).
•Beacon Period: Set the Beacon Period parameter, which specifies the duration between
beacon packets (milliseconds). The range for the beacon period is between the range 20-
1000 with a typical value of 100.

GRE Wireless LAN GINA Access Point/Bridge User Guide Page 7
•DTIM: Set the DTIM period. Determines at which interval the AP will send its broadcast
traffic. Default value is 4 beacons.
•Receive Antenna: Set the Receive Antenna among the following options Left, Right or
Diversity, to determine which antennas are used for reception.
•Transmit Antenna: Set the Transmit Antenna among the following options Left, Right or
Diversity, to determine which antennas are used for transmission.
•User Community: Indicates the user's password. The default pasword is "public"
•User Access: Indicates the user's access rights.
•Administrator Community: Indicates the administrator's password. The default password is
"public".
•Administrator Access: Indicates the Administrator's access rights.
•Manufacturer Community: Indicates the manufacturer's password.
•Manufacturer Access: Indicates the manufacturer's access rights.
•Gateway IP Address: Network Gateway
•IP Filtering: Enable/ Disable the possibility to allow only IP protocol packets to pass through
the WLAN and any other protocol packets filtered out.
•DHCP client: Enable/ Disable automatic IP Address assignment by the DHCP server
Primary Port: Determines the Wireless Bridge's IP Address.
•Primary Port: The interface which determines the DHCP server (EthernetPort/ Wireless
Port).
•Authorization Algorithm: Enable/ Disable the association with authorized MAC Addresses
stations.
•SNMP traps: Enabled/ Disabled SNMP traps, which are the messages indicating the actions
related to the Wireless AP/Bridge that have taken place.
•WEP 128 keys #1-# 4: The default key that will be used. May be edited if WEP type is 128
bits.
C. Under the window that appears, there are four options:
The "Get" button in order to view the current parameters of the Wireless Bridge
The "Modify" button does not work in this section.
The "Set" button does not work in this section.
The "Exit" button to exit this utility.

GRE Wireless LAN GINA Access Point/Bridge User Guide Page 8
5.3 Configuring the Wireless AP/Bridge with Ethernet Port / SNMP Utility
Note:
1. If you AP/Bridge unit is connected to a Hub, use the Ethernet Cable provided with the
kit.
2. If you are connecting to the AP/Bridge unit from a PC directly without a Hub, an
Optional Cross Over Cable would be required to make the connection
SNMP Utility location :
Start SNMP Manager function:
1. Connecting an Ethernet station to the Wireless AP/Bridge. You need to check if the station IP
address and the Subnet mask are configured properly and are within the same Range of the
Wireless AP/Bridge unit. Also the IP address for Wireless AP/Bridge must correspond to the
Subnet mask.
eg. ( By default the AP/Bridge unit is setup with IP 192.168.0.1 and Subnet 255.255.255.0,
Your Ethernet Station must be similar to this: IP 192.168.0.2 and Subnet 255.255.255.0
2. Execute SNMP manager application, under " File " menu :
A. Connect to Access Point: Directly connect with the Wireless AP/Bridge by first typing its IP
Address in the panel which appears and then at the Community field, type the appropriate
password (default password : public ) Press "OK" button for connection

GRE Wireless LAN GINA Access Point/Bridge User Guide Page 9
B. Find Access Point: This submenu allows you to find and connect with an Wireless Bridge
without the necessity of knowing its IP Address. Choose this submenu in order to find the
Wireless Bridge available for connection.
•Select one of the available Wireless AP/Bridge and press "Connect". Then "Connect to
Access Point" dialog appears. Typing its IP Address in the panel which appears and then
at the Community field, type the appropriate password (default password :"public" Press
"OK" button for connection

GRE Wireless LAN GINA Access Point/Bridge User Guide Page 10
3. Now, you can use SNMP manager to configure the Wireless AP/Bridge File Menu :
•Close Connection AP- Terminates the connection with the Wireless AP/Bridge.
•Download Changes- When all the desired values of the parameters have been set you
are able to download the changes (save the changes) to the Wireless AP/Bridge by
selecting this submenu.
•Options- Defines the polling interval according to which the AP Configuration polls the
Wireless Bridge in order to update the statistics and the Associated Stations List.

GRE Wireless LAN GINA Access Point/Bridge User Guide Page 11
Setup Menu :
Bridge :
Under the "Bridge" submenu, there are two options:
1. IP Configuration
2. Wireless LAN
a) IP Configuration
•MAC Address: The MAC Address of the Wireless AP/Bridge. Unique 48-bit,
hardcoded Media Access Control address known as the station identifier.
•IP Address: The IP Address of the Wireless AP/Bridge. Network-assigned Internet
Protocol address of the Wireless AP/Bridge.
•IP Mask: The Ethernet Station and the Wireless Point must be on the same subnet.
The IP address for the Wireless AP/Bridge must correspond to the Subnet Mask.
Subnet Mask consists of four sets of three digits that divide a network into
subnetworks
•DHCP Enable: DHCP client is enabled the IP Address field displays the IP Address
that was dynamically assigned to the Wireless Bridge by the network DHCP server
and the IP Mask field displays the IP Mask utilized by the network DHCP server.
Additionally you have to select the Primary Port which is the interface that determines
the DHCP server.
If changes are made, you need to "Download Changes" under the "File" menu in order to save
them.
b) Filtering
•IP Routing: If the IP Routing is enabled, only the IP protocol packets will pass
through the WLAN and any other protocol will be filtered out. If changes are made,
you need to "Download Changes" under the "File" menu in order to save them.

GRE Wireless LAN GINA Access Point/Bridge User Guide Page 12
Wireless LAN :
Under the "Bridge" submenu, there are three options:
1. Privacy Option
2. Operational Settings
3. Authorized MAC Address
a) Privacy Options
•By choosing this option you must define the encryption key values of your choice.
There are four 5 Hex digit encryption keys available if you select 64bit WEP or there
are four 13 Hex digit encryption keys available if you select 128bit WEP.
•The key is enabled only if you select it in the "Default key" option. Enable the WEP
(Wired Equivalent Privacy) option in order to activate WEP encryption for
transmissions between the stations and the Wireless Bridge.
•WEP is an authentication algorithm which protects authorized Wireless LAN users
against eavesdropping. If changes are made, you need to "Download Changes"
under the "File" menu in order to save them.
b) Operational Settings
Using this option you can either view or modify the Wireless LAN parameters of the
Wireless Bridge
•ESSID: It is an ASCII string up to 32 characters used to identify a WLAN that
prevents the unintentional merging of two co-located WLANs. The ESSID value must
be the same in all stations and Wireless in the extended WLAN.
•Channel: The channels differ from country to country. Select the channel to be used.

GRE Wireless LAN GINA Access Point/Bridge User Guide Page 13
•Fragmentation threshold: The size at which packets will be fragmented. Choose a
setting within a range of 256 to 2346 bytes.
•RTS Threshold: Minimum packet size to require an RTS (Request To Send). For
packets smaller than this threshold, an RTS is not sent and the packet is transmitted
directly to the WLAN. This is the option for the RTS Threshold activation.
•Authentication Type: Select Open System, Shared Key, or Both Open System: With
this setting any station in the WLAN can associate with an Wireless Bridge and
receive and transmit data (null authentication). Shared Key : With this setting only
stations using a shared key encryption identified by the Wireless Bridge are allowed
to associate with it. Both: With this setting stations communicate with the Wireless
Bridge either with or without data encryption.
•Preamble Type (Short/ Long): Preamble is the first subfield of PPDU, which is the
appropriate frame format for transmission to PHY (Physical layer). There are two
options, Short Preamble and Long Preamble.
•Rate: By default the unit adaptively selects the highest possible rate for transmission.
Select the basic rates to be used among the following options 1 -2 -5.5 -11 (Mbps).
•Auto Rate Fall Back: When this is enabled the transmission rate is the optimum
rate. In case of obstacles or interference, the system will automatically fall back.
•Regulatory Domain: The value of this field is already set and can not be modified.
If you press the "Advanced" button on the following three operational modes are available.
For each mode you can either view or modify the Wireless LAN parameters of the Wireless
Operational Settings window.
•Access Point: This mode provides access from wireless stations to wired LANs and
from wired LANs to wireless stations. Furthermore, wireless stations within the range
of the AP device may communicate with each other via the AP.
•Access Point Client: This mode allows the connection of one or more remote LANs
with a central LAN, creating thus an extended single virtual LAN. In this way, any

GRE Wireless LAN GINA Access Point/Bridge User Guide Page 14
station of the Remote LAN can successfully communicate with any station of the
central LAN, as if all of them belonged to the same physical LAN. Wireless Stations
can’t be associated with Access Point Clients. The AP conducts the designated traffic
to the appropriate wired or wireless station.
Preferred BSS: It is enabled if you select the Access Point Client option. BSS cor-
responds to the MAC Address of the desired AP.
•Wireless Bridge: This mode enables a wireless connection between two or more
wired LANs. Two types of connections are possible:
a.) Point to Point: The Wireless Bridge can communicate with a specific Remote
MAC Address.
Remote MAC Address: It is enabled if you select Point to Point option. It corre-
sponds to the MAC Address of the Wireless AP/Bridge of the Remote LAN.
b.) Point to Multipoint: The Wireless bridge can communicate with any Wireless
Bridge available in the same channel. When Authorization Algorithm (see the next
menu - Authorized MAC Address, is enabled, the Wireless Bridge can communicate
with any Wireless Bridge whose MAC Address exists in the Authorization Table.
If changes are made, you need to "Download Changes" under the "File" menu in order to save
them.
c) Authorization Mac Addresses
For security reasons the Wireless Bridge has the ability to associate with authorized MAC
Addresses stations.
•"Load file" button in order to load a file with the MAC Addresses that can be
associated with the Wireless Bridge (Authorized MAC Addresses).
•"Download" button in order to download the Authorized MAC Address to the Wireless
Bridge.
•"Get" button in order to get from the Wireless Bridge the Authorized MAC Addresses.
If changes are made, you need to "Download Changes" under the "File" menu in
order to save them.
Authorization:
Under the "Bridge" submenu, there are three options:
•Using this submenu the Administrator can change the passwords which referred to
the community field for the User and the Administrator Authority
If changes are made, you need to "Download Changes" under the "File" menu in
order to save them.
Commands Menu :
•Reset Devices- You can reset the Wireless Bridge. This action takes place after a
user makes configuration changes in order to initiate the changes.
•Restore Defaults- You can restore the factory default values of the Wireless Bridge.
Info Menu :

GRE Wireless LAN GINA Access Point/Bridge User Guide Page 15
Info :
•Wireless Statistics - This submenu reports the statistics concerning the unit's
Wireless activity
•Ethernet Statistics - This submenu reports the statistics concerning the unit's
Ethernet port activity
Traps : Provides information for trap messages
•View Record - You can see additional information for every Trap Message
Network Menu :
Provides information about the Network. Under this menu there is only the Associated
Station submenu.
•Associated stations- Using this submenu you can view the MAC Addresses of the
Associated stations with the Wireless Bridge.
Window Menu :
Under this menu there are the following submenus
•Cascade - All opened windows are arranged on the desktop in a cascade fashion.
•Tile - All open windows are visible on the desktop.

GRE Wireless LAN GINA Access Point/Bridge User Guide Page 16
Chapter 6 Wirelessbridge Firmware Upgrade with
Ethernet Port / TFTP Client Utility
TFTP Client Utility location :
The Wireless bridge firmware upgrade can be done through the Ethernet port with
TFTP Client Utility
1. Type the IP address of the Wireless Bridge in the "IP Address" field
2. Click " …" button and a open file dialog box will appeared. Select the firmware file
which you want to upgrade then click "Open" button
3. Click "Download Image" button to process firmware upgrade
4. The AP Utility process firmware upgrade now . Please wait for a moment.
5. Firmware upgrade succeed.
Chapter 7 Application and Note
•All USB device can not connect to the Wireless Bridge via wireless media.
•The Wireless Bridge can communicate with other Wireless Bridge available in the
same channel and ESSID.
•When Authorization Algorithm (Authorized MAC Address), is enabled, the Wireless
Bridge can communicate with any Wireless Bridge whose MAC Address exists in the
Authorization
Chapter 8 Q& A
What is Ad-hoc?
An Ad-hoc wireless LAN is a group of computers, each with a WLAN adapter, connected as an
independent wireless LAN. Ad hoc wireless LAN is applicable at a departmental scale for a
branch or SOHO operation.
What is Infrastructure?
An integrated wireless and wired LAN is called an Infrastructure configuration. Infrastructure is
applicable to enterprise scale for wireless access to central database, or wireless application for
mobile workers.

GRE Wireless LAN GINA Access Point/Bridge User Guide Page 17
What is Roaming?
Roaming is the ability of a portable computer user to communicate continuously while moving
freely throughout an area greater than that covered by a single Wireless Network Wireless
Bridge. Before using the roaming function,
What is BSS ID?
A specific Ad hoc LAN is called a Basic Service Set (BSS). Computers in a BSS must be
configured with the same BSS ID.
What is ESS ID?
An Infrastructure configuration could also support roaming capability for mobile workers. More
than one BSS can be configured as an Extended Service Set (ESS). Users within an ESS could
Roam freely between BSSs while served as a continuous connection to the network wireless
stations and Wireless Network Wireless Bridges within an ESS must be configured with the same
ESS ID and the same radio channel.
What is WEP?
WEP is Wired Equivalent Privacy, a data privacy mechanism based on a 64 / 128 bit shared key
algorithm, as described in the IEEE 802.11 standard.
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29
30 31 32 33