Linksys WPC4400N manual What is ISM band?

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Wireless-N Business Notebook Adapter

What is ISM band?

The FCC and their counterparts outside of the U.S. have set aside bandwidth for unlicensed use in the ISM (Industrial, Scientific and Medical) band. Spectrum in the vicinity of 2.4 GHz, in particular, is being made available worldwide. This presents a truly revolutionary opportunity to place convenient high-speed wireless capabilities in the hands of users around the globe.

What is Spread Spectrum?

Spread Spectrum technology is a wideband radio frequency technique developed by the military for use in reliable, secure, mission-critical communications systems. It is designed to trade off bandwidth efficiency for reliability, integrity, and security. In other words, more bandwidth is consumed than in the case of narrowband transmission, but the trade-off produces a signal that is, in effect, louder and thus easier to detect, provided that the receiver knows the parameters of the spread-spectrum signal being broadcast. If a receiver is not tuned to the right frequency, a spread-spectrum signal looks like background noise. There are two main alternatives, Direct Sequence Spread Spectrum (DSSS) and Frequency Hopping Spread Spectrum (FHSS).

What is DSSS? What is FHSS? And what are their differences?

Frequency-Hopping Spread-Spectrum (FHSS) uses a narrowband carrier that changes frequency in a pattern that is known to both transmitter and receiver. Properly synchronized, the net effect is to maintain a single logical channel. To an unintended receiver, FHSS appears to be short-duration impulse noise. Direct-Sequence Spread- Spectrum (DSSS) generates a redundant bit pattern for each bit to be transmitted. This bit pattern is called a chip (or chipping code). The longer the chip, the greater the probability that the original data can be recovered. Even if one or more bits in the chip are damaged during transmission, statistical techniques embedded in the radio can recover the original data without the need for retransmission. To an unintended receiver, DSSS appears as low power wideband noise and is rejected (ignored) by most narrowband receivers.

What is WEP?

WEP is Wired Equivalent Privacy, a data privacy mechanism based on a shared key algorithm, as described in the 802.11 standard.

What is WPA?

WPA is Wi-Fi Protected Access, a wireless security protocol that can be used in conjunction with a RADIUS server.

What is RADIUS?

RADIUS is Remote Authentication Dial-In User Service, which uses an authentication server to control network access.

Appendix A: Troubleshooting

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Frequently Asked Questions

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Contents Wireless-N Business Notebook Adapter Copyright and Trademarks How to Use this User GuideTable of Contents Windows XP Wireless Zero Configuration Front Panel List of Figures10 Creating Profiles Manual Setup Network Settings 44 Administration Modify Access Point Account Welcome IntroductionWhat’s in this User Guide? Wireless-N Business Notebook Adapter Planning your Wireless Network Network TopologyRoaming Network Layout LED Indicators Getting to Know the Wireless-N Business Notebook AdapterSetup Wizard’s License Agreement Starting the SetupSetting up the Adapter Connecting the AdapterWPA-Personal WEPCongratulations WPA2-PersonalCreating a Profile Manual Setup11 Ad-Hoc Mode Settings 13 Wireless Security WPA Personal EAP-TLS WPA EnterpriseWPA2 Enterprise 17 Wireless Security WPA2 Enterprise-EAPRadius Leap Link Information Using the Wireless Network MonitorAccessing the Wireless Network Monitor Using the Wireless Network MonitorsStatus Link Information Wireless Network StatusStatistics Link Information Wireless Network StatisticsProfile Information ProfilesCreate a New Profile Creating Profiles Available Wireless NetworkCreating Profiles Congratulations 10 Creating Profiles Manual Setup Network Settings 12 Creating Profiles Manual Setup Wireless Security WEP WPA Personal WPA Enterprise WPA2 Enterprise Radius 21 Creating Profiles Manual Setup Wireless Security Leap 23 Creating Profiles Manual Setup Congratulations Editing a Profile 25 Editing Profiles Ad Hoc ModeWEP 28 Editing Profiles Wireless Security WPA Personal 30 Editing Profiles Wireless Security WPA Enterprise EAP-TLS 33 Editing Profiles Wireless Security WPA2 Enterprise Peap Radius EAP-TLS Leap 39 Editing Profiles Congratulations Site Information Site SurveyAdministration TroubleshootingLog in as the Access Points administrator Access Point AccountSecurity Monitor Account 45 Administration Security Monitor AccountAdministration Login Security Monitor Account Administrative Functions in the Wireless Network MonitorClassification ClassificationTrusted MAC Addresses Advanced SettingsAllowed Ssid Configuration Allowed Vendor List ConfigurationAllowed Channel Configuration Security Monitor Channel UsageAP Inventory Alert List Client Inventory14 Security Monitor POP-UP Alert Alert InformationWindows Firewall AdviceCommon Problems and Solutions Appendix a TroubleshootingWhat is 802.11n standard? Frequently Asked QuestionsWhat Ieee 802.11g features are supported? What is ISM band? Windows XP Wireless Zero Configuration Appendix B Windows XP Wireless Zero ConfigurationFigure B-4 Available Wireless Network Figure B-6 Network Connection Wireless Security Figure C-1 Advanced Tab Appendix C Wireless-N InteroperabilityAppendix D Wireless Security Security PrecautionsSecurity Threats Facing Wireless Networks Appendix D Wireless Security Wireless-N Business Notebook Adapter Appendix E Windows Help Shared ResourcesNetwork Neighborhood/My Network Places Appendix F Glossary Wireless-N Business Notebook Adapter Wireless-N Business Notebook Adapter Wireless-N Business Notebook Adapter Wireless-N Business Notebook Adapter Tolerance +/- 1.5dB Appendix G SpecificationsAuthentication StandardsUnit Weight 76 oz 0.05 kg Certifications DimensionsLimited Warranty Appendix H Warranty InformationFCC Statement Appendix I Regulatory InformationWireless-N Business Notebook Adapter Wireless-N Business Notebook Adapter Wireless-N Business Notebook Adapter Wireless-N Business Notebook Adapter Wireless-N Business Notebook Adapter Appendix J Contact Information

WPC4400N specifications

The Linksys WPC4400N is a wireless networking card that epitomizes the fusion of advanced technology and user-friendly design, intended primarily for laptops and desktop computers. This product stands out for its compatibility with the IEEE 802.11n standard, which promises improved wireless coverage and higher data transfer speeds compared to its predecessors.

One of the most significant features of the WPC4400N is its dual-band capability. Operating on both the 2.4GHz and 5GHz frequency bands, it allows users to choose the optimal frequency for their needs. The 2.4GHz band offers extended range, making it ideal for general browsing and streaming, whereas the 5GHz band provides increased speed, making it perfect for high-bandwidth activities such as gaming and video conferencing.

Incorporating MIMO (Multiple Input Multiple Output) technology, the WPC4400N enhances wireless performance by using multiple antennas to transmit and receive data simultaneously. This results in a more stable connection and a significant boost in throughput. MIMO technology ensures that users experience fewer drops in connectivity and improved speeds, even when multiple devices are connected to the network.

Additionally, the WPC4400N supports backward compatibility with the 802.11b and 802.11g standards. This feature ensures that users can connect to older routers and devices seamlessly, providing flexibility and convenience in mixed-device environments. The card is equipped with a simple installation process, making it easy for users to set up their network connection without requiring extensive technical knowledge.

The WPC4400N also prioritizes security, featuring advanced encryption protocols such as WPA2, which safeguards user data from potential threats. The device’s robust security features help protect sensitive information when used in public networks, making it a reliable choice for both home and business users.

In summary, the Linksys WPC4400N is a versatile wireless networking card that combines dual-band connectivity, MIMO technology, backward compatibility, and strong security measures. These characteristics make it an excellent choice for users who demand high-performance wireless connections in a variety of settings. Whether for streaming, gaming, or day-to-day internet use, the WPC4400N is designed to deliver a seamless and efficient networking experience.