4
Science-based Industrial Park
Hsinchu, Taiwan, R.O.C.
Technical Support
E-mail: techsupt@ndc.com.tw
NDC World Wide We b
www.ndclan.com
Version A1
July 2002
TRADEMARKS
NDC and InstantWave are trademarks of National Datacomm Corporati on. All other
names mentioned in this document are trademarks/registered trademarks of their
respective owners.
NDC provides this document “as is,” without warranty of any kind, neither expressed nor
implied, including, but not limited to, the particular purpose. NDC may make improvements
and/or changes in this manual or in the product(s) and/or the program(s) described in this
manual at any time. This document could include technical i naccuracies or typographical
errors.
FCC WARNING
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 R ules . These limits ar e de si gned to provide reas onable
protection against harmf ul interfere nce in a re sidential installa tion . T his equipm ent ge nerate s,
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 bet ween t he 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
!"
You are cautioned that changes or modifications not expressly approved by the party
responsible for compliance could void your authority to operate the equipment.
This device complies w ith part 1 5 of the FCC Rule s. Opera tion is subjec t to t he f ollowing two
conditions:
1. This device may not cause harmful interference, and
2. This device must accept any interference received, includin g in t erference that may cause
undesired operation
FCC RF Radiation Exposure Statement
This equipment com plies with FCC RF radiation expos ure limits set forth for an unc o ntrolle d
environment. This equipment should be installed and operated with a minimum distance of 20
centimeters (8 inches) between t he rad iator and your body.
InstantWave
11-Mbps Wireless Access Point
Packing List
Your NWH660 package should contain the following items:
• One InstantWave NWH660 11-Mbps Wireless Access Point (AP)
• One mounting kit (mounting template, screws, and screw anchors)
• InstantWave Management System (IWMS) and AP COMFig software and
user manuals, and this user’s guide, in electronic form (one CD-ROM or
four floppy disks)
XPORT THE CONFIGURATION PROFILE TO A FILE
MPORT THE CONFIGURATION PROFILE FROM A FILE
MPORT THE CONFIGURATION PROFILE FROM A FILE
MPORT THE CONFIGURATION PROFILE FROM A FILE
Congratulations on choosing an InstantWave wireless product. This guide gives
comprehensive instructions on installing and using the InstantWave NWH660
11-Mbps Wireless Access Point (AP), and also explains how to install and use the
InstantWave Management System (IWMS) software.
8 InstantWave
11-Mbps Wireless Access Point
InstantWav e Wireless LAN Products
InstantWave wireless products provide an integrated solution to your wireless
networking requirements.
•
For indoor applicati ons: Access points, w ireless w orkgroup bri dges, w ireless
ethernet clients, and wireless adapters with various bus interfaces (PCMCIA,
USB, and PCI).
• For outdoor applications: The InstantWave building-to-building bridge
connects two independent Ethern et LAN s via a radio l ink , mak in g expens ive
outdoor cabling unnecessary. High-gain directional antennas provide the
greatest possible transmission range.
•
Management tools: InstantWave products support the industry-standard
Simple Network Management Protocol (SNMP) and the SNMP-based
InstantWave Management System (IWMS), a powerful set of utilities for
managing not only devices but whole networks and internetworks.
InstantWave Manage m ent System
-Auto-Discovery
-Remote Management
-Remote Monitor
-Firmware update
Ethernet
NWH7610 AP
-Auto IP Configure
-DHCP Cli ent
-IP Recovery
-SNMP
Wireless LAN
-PC Card
-USB adapter
-PCI Adapter
NWH6210 WEB
-16 Ethernet Ports
-Auto IP Configure
-DHCP Cli ent
-IP Recovery
-SNMP
NWH6210WEB
-16 Ethernet Ports
-Auto IP Configure
-DHCP Cli ent
-IP Recovery
-SNMP
PCPCPC
InstantWave
11-Mbps Wireless Access Point
9
IWMS — The InstantWave Mana gement System
IWMS is a powerful network management system that is fully compatible with the
industry-standard Simple Network Management Protocol (SNMP). It features:
• Automatic discovery of all InstantWave devices that are configured within
the same subnet
• Individual and batch-mode remote management of InstantWave devices,
including Multi-Monitor, Batch-Upgrade, Batch-Reset, and
Batch-LoadDefault functions. Batch-mode operation is ideal when deploying
multiple InstantWave products.
• A friendly end-user interface with a consistent look and feel.
Automatic Disc overy of InstantWave Devices
A powerful auto-discovery algorithm is built into the InstantWave Network
Management System. With a simple click on the Auto Discovery icon, all
InstantWave devices within the subnet will be discovered. This discovery feature is
based on the following techniques:
• DHCP client and IP recovery: The NWH660 has a built-in DHCP client, and
will request an IP address from a DHCP server so that SNMP management
can be carried out. Should there be a failure of the DHCP server, the
NWH660 will auto-assign itself an IP address (see next) and then
automatically negotiate for a new IP address when the server recovers.
• Auto-IP: When the N WH660 cannot get an IP address from the DHC P server ,
it will auto-assign itself an IP address of 169.254.x.x and a subnet mask of
255.255.0.0. A Windows-based system configured as a DHCP client will
follow the same algorithm to assign itself an IP addr ess in the same subnet.
When the DHCP server comes back on line, users may need to renew their
10 InstantWave
11-Mbps Wireless Access Poin t
stations’ IP settings as described below; otherwise, Windows may continue
to use the previous IP address instead of executing the auto-IP procedure.
Windows 95/98
step 1. Click Start/Run, type winipcfg, and click OK. The IP Configuration
dialog box will open.
step 2. Select the network adapter you use to connect to the NWH660. Click
Release.
step 3. Click Renew to retrieve new information (IP address, subnet mask, and
default gateway address) from the DHCP server. Click OK to save the
changes and exit the program.
Windows NT 4.0
step 1. Click Start/Programs/Command Prompt . Type ipconfig /release (with a
space after ipconfig) and press Enter.
step 2. Type ipconfig /renew (with a space after ipconfig) and press Enter to
retrieve new information (IP address, subnet mask, and default gateway
address) from the DHCP server.
step 3. Type exit and press Enter.
Windows 2000/XP
step 1. Click Start/Programs/Accessories/Command Prompt. Type ipconfig
/release (with a space after ipconfig) and press Enter.
step 2. Type ipconfig /renew (with a space after ipconfig) and press Enter to
retrieve new information (IP address, subnet mask, and default gateway
address) from the DHCP server.
step 3. Type exit and press Enter.
InstantWave
11-Mbps Wireless Access Point
11
IWMS Hardware and Software Requirements
System requirements for installing and opera ting the InstantWave Management
System are:
• An x86-based microcomputer running Microsoft Windows 95, 98, Me, NT
• Microsoft Internet Explorer 4.01 or later
• A connection to an Ethernet network
Particular versions of Windows have the following additional requirements:
1. On Windows 95, Microsoft DCOM95 must be installed. You can obtain
2. On Windows 98 (with the exception of Windows 98SE, which already
3. On Windows NT 4.0, Service Pack 4 or later must be installed.
12 InstantWave
11-Mbps Wireless Access Poin t
Terminology Used in this Guide
BSSID/MAC ID
The BSSID (Basic Service Set ID) is a factory-set ID unique to each InstantWave
WLAN product. It is identical to the MAC ID (Media Access Control ID). It allows
each InstantWave product to be identified on the wireless network.
ESSID
An Extended Service Set ID (often referred to as Service Set ID, or SSID) identifies
the wireless LAN domain that an AP is in. A domain is generally composed of
wireless APs you are most likely to communicate with. You can type an existing
domain name or create a new one that contains up to 32 characters.
Regulatory Domain
InstantWave products use the license-free ISM (Industrial, Scientific, and Medical)
band to communicate through radio waves. Different countries offer different radio
frequencies to be used as the ISM band. There are four frequency bands defined by
IEEE 802.11: Japan (2.471 to 2.497 GHz), USA, Extended Japan, Canada, and
Europe (2.4 to 2.4835 GHz), Spain (2.445 to 2.475 GHz), and France (2.4465 to
2.4835 GHz). To use InstantWave products in a country not listed above, check with
your government’s regulating body to find the correct frequency band to use. All
InstantWave products are supplied preset to the country of sale’s frequency band.
WEP
WEP stands for Wired Equivalent Privacy. It is an e ncryption scheme that provides
secure wireless data communications. WEP uses a 40-bit or 128-bit key to encrypt
data. In order to decode the data transmission, all wireless clients on the network
must use identical keys.
InstantWave
11-Mbps Wireless Access Point
13
How to Use this Guide
This user’s guide gives complete instructions for installation and use of the
InstantWave NWH660 11-Mbps Wireless Access Point (AP).
Before putting the NWH660 into operation on your LAN, it is important that you
adjust the unit’s settings to conform to your networking environment. This can be
done with either of two tools included in the NWH660 package: the AP COM-port
Configuration utility (AP COMFig) or the Insta nt Wave Managemen t System
(IWMS).
AP COMFig lets you carry out basic configurat ion of the NWH660 off-line, through
the supplied serial cable, using a networked or stand-alone computer. IWMS is a
powerful yet easy-to-use SNMP-based software package for configuration and
management of InstantWave devices over netwo rk and internetwork links.
Read throu gh the next section, “Planning the Network,” to lear n how to get the best
possible performance from your InstantWave wireless network.
Step 1: Plan the wireless network
Step 2: Pre-configure the AP
before installing it on an
existing Ethernet
network
Step 3: Install the AP on the
Ethernet network
Step 4: Carry out on-line
configuration and
management of the AP
via IWMS
14 InstantWave
11-Mbps Wireless Access Poin t
See “
Planning the Network
details.
See “
Hardware Pre-configuration
details.
See “
Installing the InstantWave Management
,” page 36, for details.
System
See “
Using the InstantWave Management
,” page 39, for details.
System
,” page 15, for
,” page 22, for
Planning the Network
Infrastructure Network Types
An infrastructure network is formed by several stations and one or more access
points (APs), with the stations within a set distance from the AP or APs. Figure 1
depicts a typical infrastructure network topology.
There are three infrastructure network setups that are commonly used. It is a good
idea to understand the possible network setups and configuration requirements
before planning your wireless net wor k.
Type 1. The simplest wireless infrastructure net work is composed of one
access point (AP) and a few wireless stations communicating via radio
waves (Figure 1). This setup enables mobile stations to communicate
with each other. The main benefit of this type of network is to extend
the range of the network. If an AP is placed between the stations, the
radio transmission distance is effectively doubled since wireless
computer #1 can talk to wireless computer #2 through the AP. The
Wireless
Computer-1
drawback of this configuration is that the effective bandwidth is halved
since all communication is relayed by the AP.
Access Point
Wireless
Computer-2
Figure 1. Simple Wireless Infrastructure Network
InstantWave
11-Mbps Wireless Access Point
15
Type 2. The next simplest wireless network is very similar to the Type 1
network. This time the AP is connected to a wired Ethernet network as
a node. In this configuration the AP operates as a bridge between the
wired Ethernet network and th e wireless networks (F igure 2).
Wireless users have the same access to network resources as they
would have if they were wired. Such a configuration i s often used to
allow roaming, or to extend an existing network into a hard-to-wire
environment.
Wired Computers
Server
Wireless Computers
Figure 2. Single AP Network
Type 3. The third type of network is composed of multiple APs and multiple
stations (Figure 3).
16 InstantWave
11-Mbps Wireless Access Poin t
“Sales” Domain
Server
Wireless Cell A
AP-1 AP-3 AP-2
Station -1 Station -2 Station -3
Wireless Cell B
Wireless Cell C
Figure 3. Multiple-AP Network
The reasons for having multiple APs installed are:
1. To increase bandwidth in order to boost overall network performance
2. To extend the coverage range
Any other configuration is usually a mix of these commonly used types.
InstantWave
11-Mbps Wireless Access Point
17
Planning an Infrastructure Network
This section explains some of the factors you need to consider when planning an
infrastructure network. Setting up is a two-step process:
1. Install and configure the InstantWave wireless products.
2. Decide the best physical location of the InstantWave wireless products so as to
optimize performance.
The following section gives quick guidelines for these two steps. First, decide
whether to have a single AP wireless network or a mul tiple AP network.
Single AP Installation
If you are setting up a sim ple netw ork with only on e AP and a f ew stat ions (a Type 1
or Type 2 network configuration as described in “Infrastructure Network Types,”
page 15), all you need to do is make sure the AP and all the wireless stations hold the
same domain name (SSID) and security (WEP) settings in their configuration.
Adding a new station to an existi ng infrastructur e network is eas y. Again, all you
need to do is to set the newly added station’s domain name (SSID) and security
(WEP) settings to be the same as those of the AP.
Multiple AP Installation
Installing multiple APs on the same network (or domain) with overlapping signals
(Figure 3, page 15
• Use the same domain name (SSID) and security (WEP) settings.
• Enable the Roaming function on stations that require it.
Note: A station will automatically connect to whichever AP in the same domain is
currently offering the best signal.
18 InstantWave
)
11-Mbps Wireless Access Poin t
Roaming
InstantWave products allow wireless stations to roam freely within an infrastructure
domain composed of multiple APs with overlapping signal coverage (as in the Type
3 network configuration descr ibed in the previous section). For example, roaming
enables Station 1 to move from the AP 1 signal coverage area to the AP 2 signal
coverage area without disconnecting from the network. The handover is achieved
transparently; the Station 1 user woul d not real ize he had moved f rom AP 1 to AP 2.
The requirements for a roaming environment are:
a) Multiple APs with overlapping signal coverage (see “Multiple AP
b) The APs must be configured to have the same domain name (SSID) and
c) The mobile stations must have the same domain name (SSID) and security
It is advisable that APs on dif ferent TCP/IP subn ets be given diff erent domain names
to avoid roaming confusion (see the note below).
Note: For a mobile station t o move between APs without losing i ts netw ork link, the
Installation,” page 18)
security (WEP) settings (see “Encryption,” page 27).
(WEP) settings as the APs.
Roaming function must be e nabl ed on t he st ation, and the APs that t he s tati on
roams to must be configured with the same domain name. If a station detects
that the signal quality on the link to the current AP is poor, it will search for
an AP in the same domain with better signal quality and automatically
associate (establish a connection) with it. The station’s IP address, however,
will not change. A TCP/IP router will not route packets to a mobile station
that has associated with an AP on a different TCP/IP subnet. In other words,
if your network consist s of two subnets connect ed by a r outer, a mobile station
may roam to a different subnet with the same domain name and then be
unable to communicate with other network devices via TCP/IP. To avoid this
problem, you must assign dif fer ent domain names to diff er ent TCP/IP subnets .
InstantWave
11-Mbps Wireless Access Point
19
Hardware Description
Figure 4. NWH660 Front Panel
LED Indicators
The NWH660’s LEDs show the status of the unit and its connections.
Figure 5. LED Indicators
LED Color Meaning
Power Green Off: Device not receiving power
Blinking: Diagnostic test in progress
On: Normal operation
Status Red Off: Normal operation
On: Normal operation interrupted
Ethernet Orange Off: No Ethernet link
On: Ethernet link up but idle
Blinking: Ethernet activity
Wireless Green Off: No wireless link
On: Wireless link up but idle
Blinking: Wireless activity
20 InstantWave
11-Mbps Wireless Access Poin t
Connectors and Switches
Power Jack
Power Switch
Ethernet Port
Reset Button
Figure 6. NWH660 Rear Panel
Item Function
Power jack DC 5V power input
Power switch Device on/off
Ethernet port RJ-45 jack for connection to 10Base-T
Ethernet LAN
Reset button If held down more than 3 seconds,
reloads factory settings and restarts
device. Power LED will blink during
reset and then go off to indicate that
button can be released.
Serial port 9-pin D-shell connector for RS-232
connection to computer run ning AP
COMFig utility
Antenna connector Reverse SMA connector for antenna
Antenna Connector Serial Port
InstantWave
11-Mbps Wireless Access Point
21
Hardware Pre-configuration
Before adding the NWH660 to an existing Ethernet network, you may need to set
basic parameters — e.g., SSID, security s ettings (WEP), A P n ame, ch ann el number,
and IP address — to make the AP compatible with the existing network.
From the AP COMFig utility:
Follow the steps below to connect the AP to a PC for configuration:
step 1. Connect the supplied RS-232 cable to the AP’s serial port and connect
the other end to a serial port (COM port) on the PC.
step 2. Power up the AP.
Or from IWMS:
The NWH660’s Ethernet port supports a speed of 10 Mbps. Using regular Category
3 or higher UTP/STP cable, you can connect it directly to a hub or switch.
step 3. Connect the NWH660 and your PCs/network devi ces to the Ethern et hub
or switch.
step 4. Power up the NWH660.
Installing the AP Management T ools
step 1. Insert disk 1 in drive A and click Start/Run. Type a:/menu.exe and click
OK to open the main menu.
step 2. Click Install AP Management Tools to install the AP COMFig Tool,
InstantWave Management System (IWMS) and Trap Server utility on
your system.
22 InstantWave
11-Mbps Wireless Access Poin t
Using the AP COMFig T ool
The AP COMFig Tool is a Windows-based utility used to configure the AP via a
COM port connection between the AP and a PC . It provides th e following fun ctions:
• Sets AP parameters (e.g., IP address, domain name [SSID], security, etc.)
• Diagnoses the AP hardware and shows the results
• Upgrades the AP firmware
• Resets the AP configuration
To start the AP COMFig Tool, click Start/Programs/InstantWave High Rate
AP/AP COMFig Tool. The program open s wi th the Connect panel displayed. It will
show Connected when a connection is made.
Figure 7. AP COMFig Tool/Connect
AP COMFig/Password
Click the Password tab to open the Password panel. Setting a password prevents
unauthoriz ed changes to the AP configuration set t ings.
Note: The password will be shared with the IWMS program on the same PC.
InstantWave
11-Mbps Wireless Access Point
23
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