Netkrom W24-AP11H User manual

Date of Issue: April, 02, 2001

FCC Information
This equipment has been tested and found to comply with the limits for a Class A digital devices
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment.
This equipment generates, uses, and can radiate radio frequency energy and, if not installed and
used in accordance with the instruction manual, may cause harmful interference to radio
communication.
Operation of this equipment in residential area is likely to cause harmful interference in which
case the user will be required to correct the interference at this own expense.
The user should not modify or change this equipment without written approval from company
name. Modification could void authority to use this equipment.
For the safety reason, people should not work in a situation which RF Exposure limits be
exceeded. To prevent the situation happening, people who work with the antenna should be
aware of the following rules:
1. Install the antenna in a location where a distance of 20 cm from the antenna may be
maintained.
2. While installing the antenna in the location, please do not turn on the power of wireless card.
3. While the device is working, please do not contact the antenna.

Copyright
Copyright © 2000 all rights reserved. No part of this publication may be reproduced,
adapted, stored in a retrieval system, translated into any language, or transmitted in any
form or by any means without the written permission of the supplier.
About This Manual
The purpose of this manual is for the setup of the 11Mbps Wireless LAN Inter-Building
Access Point. This manual, revised as version 2.5.0 in 2001, includes procedures assisting
you in avoiding unforeseen problems.

Table of Contents
Chapter 1 Introduction.......................................................................1
1-1 Features and Benefits ................................................................................ 1
1-2 Applications .............................................................................................. 2
1-2 Applications .............................................................................................. 2
1-3 System Configurations............................................................................... 3
Chapter 2 Hardware Installation.......................................................4
2-1 Product Kit................................................................................................ 4
2-2 System Requirements................................................................................. 4
2-3 Mechanical Description............................................................................. 5
2-4 Hardware Installation ............................................................................... 6
Chapter 3 Configuring the Inter-Building Access Point....................7
3-1 Using the Inter-Building Access Point Utility ............................................ 7
3-2 Using the Web Management .................................................................... 17
3-3 Using the Telnet ...................................................................................... 22
Chapter 4 Troubleshooting ............................................................... 29
Appendix A Network Configuration................................................. 31
A-1 Network Topology................................................................................... 31
Appendix B Specifications................................................................34
Appendix C Glossary.........................................................................35

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Chapter 1 Introduction
The next-generation wireless LAN device – 11Mbps Wireless Inter-building Access Point, are
specially designed for Point-to-Point and Point-to-Multipoint applications, offering campus-
wide connections between buildings at a speed of up to 11Mbps. Fully compliant with
IEEE802.11b standard, the Wireless Inter-building Access Point provides powerful features
such as the Windows-based configuration utility, MAC address filtering, WEP security and
more.
1-1 Features and Benefits
nCreates a Point-to-Point connection linking two LANs, using 2 Inter-Building Access
Point.
nCreates a Point-to-Multipoints system using three or more Inter-Building Access Point.
nDetachable antenna allows you for the use of external high gain antenna.
nWith a data rate of 11Mbps and 5.5Mbps, the system is faster than an E1/T1 data link.
nFeatures 11Mbps data rate by incorporating Direct Sequence Spread Spectrum
technology.
nFully IEEE 802.11b compatible. Allow inter-operation among multiple vendors.
nTechnique operating in the unlicensed 2.4Ghz ISM band.
nSeamless roaming within the 802.11 & 802.11b wireless LAN infrastructure.
nProvides user authentication to enforce tight security.
nMAC address control.
nHighly efficient antenna provides a range of operation up to 800 feet in free space.
nEasy to install and friendly to user, just plug and play!
nProvides Window-based configuration utility.
nTight design with light weight, compact size, and low power consumption.

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1-2 Applications
The 11Mbps Wireless LAN products offer a fast, reliable, cost-effective solution for wireless
client access to the network in applications like these:
1. Remote Access to Corporate Network Information
E-mail, file transfer and terminal emulation.
2. Difficult-to-Wire Environments
Historical or old buildings, asbestos installations, and open area where wiring is difficult
to deploy.
3. Frequently Changing Environments
Retailers, manufacturers and those who frequently rearrange the workplace and change
location.
4. Temporary LANs for Special Projects or Peak Time
C1- Trade shows, exhibitions and construction sites where a temporary network will be
practical. C2- Retailers, airline and shipping companies need additional workstations
during peak period. C3- Auditors requiring workgroups at customer sites.
5. Access to Database for Mobile Workers
Doctors, nurses, retailers, accessing their database while being mobile in the hospital,
retail store or office campus.
6. SOHO (Small Office and Home Office) Users
SOHO users need easy and quick installation of a small computer network.
7. High Security Connection
The secure wireless network can be installed quickly and provide flexibility. (Please
refer to page 14 for more information on encryption configuration.)

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1-3 System Configurations
The 11Mbp Wireless Inter-Building Access Point can be configured in a variety of network
system configurations.
Wireless Infrastructure
In a wireless infrastructure, the Inter-Building Access Point acts as a bridge. The Inter-
Building Access Point connects the wireless clients together. The Inter-Building Access Point
acts as a center point for all wireless communications. This would increase efficiency of the
communications since the wireless adapters do not need to be within direct range of each
other.
Wireless Infrastructure with Stations Attaching to a Wired LAN
The 11Mbps Wireless LAN Inter-Building Access Point will provide an access to the local
LAN. An integration of wireless and wired LAN is called an Infrastructure configuration. A
group of wireless LAN PC users and an Inter-Building Access Point construct a Basic Service
Set (BSS). Each wireless PC in this BSS can talk to each other on your network via the Inter-
Building Access Point.

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Chapter 2 Hardware Installation
This chapter describes initial setup of the Inter-Building Access Point.
2-1 Product Kit
Before installation, make sure that you the following items:
uThe 11Mbps Wireless LAN Inter-Building Access Point…………………..x 1
uQuick Start Guide ……………………………….…………………………...x 1
uPower Adapter……………………………………………..………………….x 1
uProduct CD …………………………………………………………………x 1
If any of the above items are not included or damaged, please contact your local dealer for
support.
2-2 System Requirements
Installation of the 11Mbps Wireless LAN Inter-Building Access Point requires:
1. An AC power outlet (100~240V, 50~60Hz) which supplies the power for the Inter-
Building Access Point.
2. A 10/100 Base-T (UTP) Ethernet cable drop.

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2-3 Mechanical Description
Top panel of the Inter-Building Access Point:
The following table provides an overview of each LED activity:
LED Definition
Activity
Description
PWR
Continuous Green
Power enabled
AP
Continuous Green
The Inter-Building Access Point is
ready in service.
Off: No wireless activity
WLAN
Flashing Green
Flashing: Wireless RX/TX activity
Off: No Ethernet traffic activity
LAN
Flashing Green
Flashing: Wired LAN traffic activity
Off: no station connected to the Inter-
Building Access Point
LINK
Continuous Green
On: with one or more stations
associated to the Inter-Building
Access Point
Back panel of the Inter-Building Access Point:
Power Socket
The power adapter plugs into the socket labeled “POWER”.
Ethernet Ports
The 11Mbps Wireless LAN Inter-Building Access Point supports an Ethernet ports: RJ-45
MDI daisy-chain port (labeled “MDI”). You may connect the Inter-Building Access Point
either to a hub or a PC. Please note that, use the cross-over cable when you desire to connect
the Access Point to a PC. The two LEDs (10/100/Link) next to the Ethernet ports indicate the
Ethernet physical link status. The ‘Link’ LED is a good indicator for to see if you have
proper Ethernet connection.
Default
NOTE: The button labeled “DEFAULT” enables you to restore the Access Point’s default
setting. This is used when you forget the password. Please detach the DC power plug and
press the “DEFAULT” button on the back panel of the Access Point. Reconnect the power
and keep holding the button in for a few seconds until the “AP” LED indicator blinks. This
will restore the Access Point’s default settings and enable you to configure the Access Point
via utility, telnet or Web again.
DC 12V
MDI
LINK
10/100
DEFAULT

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2-4 Hardware Installation
Take the following steps to set up your Inter-Building Access Point.
nSite Selection
Before installation, determine the Inter-Building Access Point location. Proper placement
of the Inter-Building Access Point is critical to ensure optimum radio range and
performance. You may use the Site Survey and Access Points Browser utility (The
utilities came with the wireless PC Card) to choose a proper placement for your Inter-
Building Access Point. Typically, the best location to place your Inter-Building Access
Point at your site is the center of your wireless coverage area. Try to place your mobile
stations within the line of sight. Obstructions may impede performance of the Inter-
Building Access Point.
nConnect the Ethernet Cable
The 11Mbps Wireless LAN Inter-Building Access Point supports 10/100M Ethernet
connection. Attach your UTP Ethernet cable to the RJ-45 connector on the Inter-Building
Access Point. Then connect the other end of the RJ-45 cable to a hub or a station. Please
note that, use the cross-over cable when you desire to connect the Access Point to a PC.
nConnect the Power Cable
Connect the power adapter to the power socket on the Inter-Building Access Point, and
plug the other end of the power into an electrical outlet. The Inter-Building Access Point
will be powered on and all five indicators on the top panel will flash in sequence to test
the functionality of the indicators.
NOTE: ONL Y use the power adapter supplied with the Inter -Building Access Point .
Otherwise, the product may be damaged.

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Chapter 3 Configuring the Inter-Building Access
Point
The 11Mbps Wireless LAN Inter-Building Access Point is shipped with default parameters,
which will be suitable for the typical infrastructure wireless LAN. Just simply install the
Inter-Building Access Point, power it on, and it is now ready to work. Nevertheless, you can
still adjust configuration settings depending on how you would like to manage your wireless
network. The 11Mbps Wireless Inter-Building Access Point allows for configuration either
via the configuration utility, known as Access Point Manager, TCP/IP (Telnet) connection or
Web Management.
3-1 Using the Inter-Building Access Point Utility
Installed on your Windows 95/98/NT/ME/2000 desktop computer, the Windows-based utility
“Access Point Manager” provides a user-friendly interface. The Access Point Manager
enables you to configure all of your Inter-Building Access Points on the network more easily
than ever before. The following gives instructions guiding you through the installations of the
Access Point Manager utility.
1. Insert the Software and Documentation CD into the CD-ROM drive, or the floppy disk that
came with your product kit into the floppy drive on your computer.
2. From the Start menu on the Windows desktop, choose Run.
3. In the Run dialog box, type the path where the utility is located, then click OK. For floppy
installation: A:\setup.
4. Follow the on-screen instructions to install the Access Point Manager.
5. Upon completion, go to Program Files and execute the Access Point Manager. It will
begin to browse all the Inter-Building Access Points available on the network.

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6. Double click an Inter-Building Access Point icon to access its property dialog box. Enter
the password in the entry field. The default password is “default”.
7. After entering the correct password, a configuration window appears. You will see the
basic information of the Inter-Building Access Point, such as MAC Address, Frequency
Domain and Firmware Version.
MAC Address: It is a hardware identification number that distinguishes the unit from others.
You will see the number on the label located on the bottom of the Inter-Building Access Point.
Frequency Domain: The regulated operating frequency per country.
Firmware Version: Displays the firmware version that is equipped with your hardware.

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Statistics
The statistics tab contains three of the following items for you to monitor the Ethernet and
Wireless network traffic.
Ethernet:
You may monitor the TX/RX on the wired network.
Wireless:
You may monitor the TX/RX of the wireless network.

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Wireless Error:
This item offers detailed information on error wireless packets that the AP receives and
transmits.
Receive:
Packet FCS Errors: The number of wireless packets that fail during FCS transmission (Frame
Check Status when accessing the wired network.
No Buffer: The number of wireless packets that the AP ignores due to insufficient memory.
Received WEP Errors: The number of wireless packets that have WEP encryption errors.
Transmit:
Deferred Transmission: The number of packets that have deferred transmission due to the fact
that the medium is busy.
Retry Limit Exceed: The number of packets that are not sent due to the reason that the packets
exceed the retry limits.
Single Tries: The number of packets that are successfully sent on the first retry.
Multiple Retries: The number of packets that are successfully sent after several retries.
Wrong Source Address: The number of packets that are ignored by the Inter-Building Access
Point because the source client is not in its BSS.
Other reasons: Other reasons that cause errors.

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Configuration
The configuration tab contains 5 following items for you to make changes for the Inter-
Building Access Point.
General:
AP name: In this entry field, you may enter any name. This will enable you to manage your
Inter-Building Access Points with more ease if you have multiple Inter-Building Access Point
on the network.
AP mode: This item enables you to set the operation mode for the Access Points
nWireless LAN Access Point (AP): Served as a transparent Media Access Control (MAC)
bridge connecting wireless network and the backbone network.
nInter-Building with Repeating (PxP): Connect two or more separated networks with the
Inter-Building Access Point.
IEEE802.11:
ESSID: The ESSID is a unique ID given to the Inter-Building Access Point. Wireless clients
associating to the Inter-Building Access Point must have the same ESSID. The ESSID can
have up to 32 characters.
Channel: You may select any of the available channels as an operational channel for your
Inter-Building Access Point.

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RTS Threshold: RTS Threshold is a mechanism implemented to prevent the “Hidden Node”
problem. “Hidden Node” is a situation in which two stations are within range of the same
Inter-Building Access Point, but are not within range of each other. Therefore, they are
hidden nodes for each other. When a hidden station starts data transmission with the Inter-
Building Access Point, it might not notice that another station is already using the wireless
medium. When these two stations send data at the same time, they might collide when
arriving simultaneously at the Inter-Building Access Point. The collision will most certainly
result in a loss of messages for both stations. Thus, the RTS Threshold mechanism will
provide the solution to prevent data collisions. When the RTS is activated, the station and its
Inter-Building Access Point will use a Request to Send/Clear to Send protocol (RTS/CTS).
The station will send an RTS to the Inter-Building Access Point, informing that it is going to
transmit the data. Upon receipt, the Inter-Building Access Point will respond with a CTS
message to all station within its range to notify all other stations to defer transmission. It will
also confirm to the requesting station that the Inter-Building Access Point has reserved the
channel for transmission.
Fragmentation Threshold: Fragmentation mechanism is used for improving the efficiency
when there is high traffic within the wireless network. If you transmit large files in a wireless
network, you can enable the Fragmentation Threshold and specify the packet size.
The mechanism will split the packet into the packet size you set.

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Administration:
You may change the default password by entering the new password. Enter the new password
in the Confirm Change field to make the new setting take affect.
IP Address:
To enable remote access to the Inter-Building Access Point using Telnet or Web Management,
you must assign an IP address to the Inter-Building Access Point. You may also assign other
related Internet addressing options, such as subnet mask or gateway address. Consult your
network administrator to obtain an available IP address.

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WEP:
The 11Mbps Wireless LAN Inter-Building Access Point allows you to create up to 4 data
encryption keys to secure your data from being eavesdropping by unauthorized wireless user.
To activate and set the WEP keys, do the following:
nFrom the WEP encryption item, pull down the menu and it will list three options:
Disable – Allows wireless adapters communicate with Inter-Building Access Points
without any data encryption.
WEP40 – Requires wireless stations to use data encryption when communicating with the
Inter-Building Access Point.
nWhen WEP40 is selected, type five alphanumeric characters in the range of “a-z”, “A-Z”
and “0-9” (e.g. MyKey) in the WEP Key 1 entry field. Alternatively, you may enter 10
digit hexadecimal values in the range of “A-F” and “0-9”, preceded by the characters “0x”
values (e.g. 0x11AA22BB33). You can also enter WEP keys in the Key 2, Key 3 and Key
4 if you wish. WEP will only use 1 Key. You will have to select one WEP key as an active
key before enabling use of encryption.
NOTE: The WEP key must be set up exactly the same on the Inter-Building Access Points
as they are on the wireless client stations. If you use Key 1 on the Inter-Building Access
Point and the value is (e.g. MyCar), the same must be assigned to Key 1 for all client
stations.

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Upgrade
This item is used for uploading the newest firmware of the Inter-Building Access Point. You
may either enter the file name in the entry field or browse the file by clicking the Open File
button. For information about the release of the newest firmware, contact your local reseller.
Access Control:
With the Access Control Table enabled, you can authorize wireless units to access the Inter-
Building Access Point by identifying the MAC address of the wireless devices that are
allowed access to transmit data. To create or edit the Access Control Table, do the following:
Go to the Access Control tab and select “Enable Access Control”. Note that when you
enable the Access Control Table without any MAC address in the table, no access is allowed
to communicate with the Inter-Building Access Point.

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Use the following buttons to manage the Access Control Table:
Add – to enter MAC addresses of authorized wireless devices one at a time.
Edit – to change the entries in the table if you enter the incorrect MAC address.
Remove – to remove MAC addresses one at a time.
Clear – to remove all MAC addresses in the table.
Import – to import an existing Access Control Table.
Export – to save the current Access Control Table to a location on your computer. You may
save the file as a text document.