Conceptronic C54U Manuale utente

C54U

Conceptronic Wireless 54Mbps USB Stick Adapter

Manual

Rev. 040207v1

Contents

PACKAGE CONTENTS ................................................................... 3

INTRODUCTION ......................................................................... 4

PRODUCT FEATURES ................................................................... 5

LEDS................................................................................... 5

WIRELESS BASICS....................................................................... 6

GETTING STARTED ..................................................................... 9

FIRST TIME SETUP..................................................................... 17

INSERT THE C54U CD-ROM INTO YOUR COMPUTER .................................. 17

INSTALLING THE C54U WIRELESS USB STICK ADAPTER IN YOUR COMPUTER .......... 21

CONNECTING TO A NETWORK ......................................................... 27

USING THE CONFIGURATION UTILITY FOR WINDOWS XP............................... 34

TROUBLESHOOTING ................................................................... 40

TECHNICAL SPECIFICATIONS ........................................................... 47

Package Contents

Contents of Package:

• C54U USB Wireless 54Mbps USB Stick Adapter

• USB Extension Cable

• Manual and Drivers on CD

• Hardware Installation Guide (printed)

If any of the above items is missing, please contact your reseller.

System Requirements:

• A computer with an available USB slot

• Windows XP, Windows 2000, Windows ME, or Windows 98 SE

• At least 32 MB of memory and a 300 MHz processor or higher

• An 802.11g Access Point for Infrastructure Mode or another

802.11g wireless adapter for Ad-Hoc mode.

Introduction

The C54U Wireless USB Stick Adapter is an advanced IEEE 802.11g

compatible, high-performance wireless adapter that supports data transfer

speeds of up to 54 Mbps. Amazingly compact, the C54U is literally small

enough to fit in your pocket.

USB technology makes installation and configuration quick and easy. The

C54U is an ideal way to connect your laptop computer to a Wireless Local

Area Network (WLAN.)

After completing the steps outlined in the Quick Installation Guide

(included in your package) you will have the ability to share information

and resources, such as files and printers, and take full advantage of a

“connected” environment for work or play. Please take a look at our

Getting Started section in this manual. You will see several options for

setting up a network using the C54U.

The C54U comes with software drivers for the most popular Microsoft

Windows operating systems and can be integrated into a larger network,

running Windows XP, Windows 2000, Windows ME, Windows 98SE, in either

Ad Hoc mode (without an Access Point) or Infrastructure mode (with an

Access Point.)

This manual provides a quick introduction to wireless technology and its

application as it relates to networking. Take a moment to read through this

manual and see how wireless technology can help you do things better and

more easily.

Product Features

• Adheres to 802.11g standard in providing high data wireless transfer

rates of up to 54 Mbps.

• Operation in the 2.4GHz Unlicensed National Information

Infrastructure (U-NII) frequency band

• Orthogonal Frequency Division Multiplexing (OFDM) – a new

technique for transmitting high speed data over a radio wave.

• Dynamic date rate scaling at 1, 2, 5.5, and 11Mbps for IEEE 802.11b

• Dynamic date rate scaling at 6, 9, 12, 18, 24, 36, 48, 54Mbps for

IEEE 802.11g

• Maximum reliability, throughput and connectivity with automatic

data rate switching.

• Supports Wired Equivalent Privacy (WEP) data encryption at

64/128/152-bit encryption with dynamic key exchange for security.

• Supports infrastructure networks via Access Point and ad-hoc

networks via peer-to-peer communication.

• Requires an available USB slot.

• User-friendly configuration and diagnostic utilities.

LEDs

LED stands for light-emitting diode.

The C54U has two LEDs: Power and Activity

Network Mode LED Activity

Network Activity Both LEDs flash in unison

Searching for a Network

Connection

Both LEDs flash alternately

Associated with the

Network, but No

Activity

Both LEDs flicker dimly

Power Save Mode

(Power-up or Reset)

POWER LED – slow rate blink

Adapter is disabled Only the POWER LED flashes

Wireless Basics

The C54U is based on industry standards to provide easy-to-use and

compatible high-speed wireless connectivity within your home or business.

Strictly adhering to IEEE 802.11g, the C54U will allow you to access the

data you want, when and where you want it. No longer will you be limited

to one location or forced to run new wiring through your home or office.

You will be able to enjoy the freedom that wireless networking delivers.

A wireless LAN (WLAN) is a cellular computer network that transmits and

receives data with radio signals instead of wires. Wireless LANs are used

increasingly in both home and office environments. Innovative ways to

utilize WLAN technology are helping people to work and communicate

more efficiently. Increased mobility and the absence of cabling and other

fixed infrastructure has proven to be beneficial for many users.

Wireless users can use the same network applications they use on an

Ethernet LAN. Wireless adapters used on laptop and desktop systems,

support the same protocols as Ethernet adapter cards. For most users,

there is no noticeable functional difference between a wired Ethernet

desktop computer and a computer equipped with a wireless adapter -

other than the added benefit of the ability to roam within the wireless cell.

Under many circumstances, it may be desirable for mobile network devices

to link to a conventional Ethernet LAN in order to use servers, printers or

an Internet connection supplied through the wired LAN. A Wireless Access

Point (AP) is a device used to provide this link.

People use wireless LAN technology for many different purposes.

Mobility - Productivity increases when people have access to data in any

location within the operating range of the WLAN. Ad-hoc management

decisions based on real-time information can significantly improve worker

efficiency.

Low Implementation Costs - WLANs are easy to set up, manage, change

and relocate. Networks that frequently change, both physically and

logically, can benefit from WLANs’ ease of implementation. WLANs can

operate in locations where installation of wiring may be impractical.

Furthermore, IEEE standardization mandates interoperability of all WLAN

devices that conform to the 802.11g set of standards.

Installation Speed and Simplicity - Installing a wireless LAN system can be

fast and easy and can eliminate the need to pull cable through walls and

ceilings.

Installation Flexibility - Wireless technology allows the network to go

where wires cannot go.

Reduced Cost-of-Ownership - While the initial investment required for

wireless LAN hardware might be higher than the cost of wired LAN

hardware, overall installation expenses and life-cycle costs will be

significantly lower. Long-term cost benefits are greatest in dynamic

environments requiring frequent moves, adds, and changes.

Scalability - Wireless LAN systems can be configured in a variety of

topologies to meet the needs of specific applications and installations.

Configurations are easily changed and range from peer-to-peer networks

suitable for a small number of users to full infrastructure networks of

thousands of users that allow roaming over a broad area.

Standards - Based Technology

The IEEE 802.11g standard designates that devices operate at an optimal

data rate of 54 Megabits per second. This means you will be able to

transfer large files quickly or even watch a movie in MPEG format over

your network without noticeable delays. This technology works by

transmitting high-speed digital data over a radio wave utilizing OFDM

(Orthogonal Frequency Division Multiplexing) technology. OFDM works by

splitting the radio signal into multiple smaller sub-signals that are then

transmitted simultaneously at different frequencies to the receiver. OFDM

reduces the amount of crosstalk (interference) in signal transmissions. The

C54U will automatically sense the best possible connection speed to ensure

the greatest speed and range possible with the technology.

Installation Considerations

Designed to go up to 900 feet (~300 meters), C54U lets you access your

network with your laptop computer from virtually anywhere you want.

Keep in mind, however, that the number and thickness of walls, ceilings or

other objects that the wireless signals must pass through may limit range.

Typical ranges vary depending on the types of materials and background RF

(radio frequency) noise in your home or business. The key to maximizing

range is to follow these basic principles:

1. Keep the number of walls and ceilings between the Access Point and

your receiving device to a minimum - each wall or ceiling can reduce

your C54U’s range from 3-90 feet (1-30 meters.) For some businesses or

for a large residential home deployment, it may be beneficial to have

more than one access point with overlapping coverage.

2. Be aware of the direct line between Access Points and computers with

wireless adapters - a wall that is 1.5 feet thick (.5 meters), at a 45-

degree angle appears to be almost 3 feet (1 meter) thick. At a 2-degree

angle it looks over 42 feet (14 meters) thick! Try to make sure that the

Access Points and adapters are positioned so that the signal will travel

straight through a wall or ceiling for better reception.

3. Building materials make a difference - a solid metal door or aluminum

studs may have a negative effect on range. Try to position Access

Points, and computers with wireless adapters so that the signal passes

through drywall or open doorways and not other materials.

5. Keep the C54U away (at least 3-6 feet or 1-2 meters) from electrical

devices or appliances that generate extreme RF noise.

For the average residence, range should not be a problem. If you

experience low or no signal strength in areas of your home that you wish to

access, consider positioning the Access Point in a location directly between

the computers with wireless adapters that will be connected. Additional

Access Points can be connected to provide better coverage in rooms where

the signal does not register as strongly as desired.

Getting Started

To begin, select the type of wireless network you will be building.

We will discuss the following types of networks in this section:

1. A Home Internet Network with A Residential Gateway/Router

2. A Home Internet Network with Multiple IP Addresses

3. An Ad Hoc Network

4. An Ad Hoc Network with Internet Sharing

Please select, from the four types of networks described above, the type

of network that is appropriate for your needs. Please follow the

instructions in the corresponding section that follows.

1. A Home Internet Network with A Residential Gateway/Router

(Network administrators with Dynamic IPs can also follow these

instructions.)

If you have two or more computers (laptops or desktops) and want to share

files, printers, and Internet access using a DHCP-capable Residential

Gateway/Router – or - if you want to connect to an Ethernet network that

uses Dynamic (DHCP) IP addresses, then follow the instructions on the next

page.

Requirements: A Residential Gateway/Router connected with an

Ethernet (CAT5) cable to an 802.11g Access Point.

DHCP stands for

Dynamic Host

Configuration Protocol.

It is a protocol for

assigning dynamic IP

addresses

“automatically.” With a

DHCP-capable

gateway, there is no

need to manually

assign an IP address.

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