Linksys WAP54GPE manual What is the ISM band?

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Wireless-G Exterior Access Point

What is the 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.

Would the information be intercepted while transmitting on air?

WLAN features two-fold protection in security. On the hardware side, as with Direct Sequence Spread Spectrum technology, it has the inherent security feature of scrambling. On the software side, the WLAN series offers a variety of wireless security methods to enhance security and access control. Users can set it up depending upon their needs.

Can Linksys wireless products support file and printer sharing?

Linksys wireless products perform the same function as LAN products. Therefore, Linksys wireless products can work with NetWare, Windows NT/2000, or other LAN operating systems to support printer or file sharing.

What is WEP?

WEP is Wired Equivalent Privacy, a data privacy mechanism based on a 40-bit shared-key algorithm, as described in the IEEE 802.11 standard.

Appendix A: Troubleshooting

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Frequently Asked Questions

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Contents 802 GHz .11g Wireless- G Copyright and Trademarks How to Use this User GuideTable of Contents Appendix a Troubleshooting Appendix B Wireless SecurityFrequently Asked Questions List of Figures 15 Wireless Advanced Wireless Welcome IntroductionWhat’s in this User Guide? Wireless-G Exterior Access Point Network Layout Planning Your Wireless NetworkNetwork Topology RoamingExample of a Simple Wireless Network LEDs Getting to Know the Wireless-G Exterior Access PointWireless Receiving data from a wireless deviceAntenna That supports Power over Ethernet PoEPorts EthernetReset Button Ground Reset Button and GroundInternal Antenna Pattern Horizontal Plane Antenna PatternWireless-G Exterior Access Point Wireless-G Exterior Access Point Connecting the Wireless-G Exterior Access Point Hardware InstallationOverview Ground the Access Point Accessing the Utility Setting Up the Wireless-G Exterior Access PointNavigating the Utility SetupWireless Enter the Host Name and IP Address settings on this screenAP Mode AdministrationStatus IP Settings Configuring the Wireless-G Exterior Access PointSetup Tab Network SetupTime Setup Time TabWireless Basic Wireless Settings Tab Wireless NetworkConfigure the Wireless Network attributes for each Ssid Wireless-G Exterior Access Point WPA-Personal aka WPA-PSK Wireless Wireless Security TabWireless Security DisabledWPA2-Personal Mixed WPA2-PersonalWPA2-Enterprise WPA-EnterpriseWPA2-Enterprise Mixed 11 Wireless Wireless Security WPA2 Enterprise MixedRadius Wireless Wireless Connection Control Tab Wireless Connection ControlSelect MAC Address From Networked Computers Advanced Wireless Wireless Advanced Wireless Settings TabWireless-G Exterior Access Point MAC Address AP Mode Tab17 Wireless Repeater Wireless Repeater18 Site Survey Local AP Password Administration Management TabAP Password Web AccessWireless-G Exterior Access Point Log Administration Log TabWireless-G Exterior Access Point Firmware Upgrade Administration Factory Default TabAdministration Firmware Upgrade Tab Factory DefaultAdministration Reboot Tab RebootOn this screen you can reboot the Access Point Config Management Administration Config Management TabStatus Local Network Tab InformationLocal Network 26 Status Wireless Status Wireless TabSystem Performance WiredWireless Status System Performance TabWireless-G Exterior Access Point Frequently Asked Questions Appendix a TroubleshootingWhat Ieee 802.11g features are supported? What is the ISM band? Does the Access Point function as a firewall? Appendix B Wireless Security Security PrecautionsSecurity Threats Facing Wireless Networks Appendix B Wireless Security Wireless-G Exterior Access Point Appendix C Upgrading Firmware Figure C-1 Firmware UpgradeAppendix D Windows Help Shared ResourcesNetwork Neighborhood/My Network Places Appendix E Glossary Wireless-G Exterior Access Point Wireless-G Exterior Access Point Wireless-G Exterior Access Point Wireless-G Exterior Access Point IEEE802.11g, IEEE802.11b, IEEE802.3u, IEEE802.3af Appendix F SpecificationsModel StandardsExternal antenna is sold separately Operating HumidityStorage Humidity To 95%, Non-CondensingLimited Warranty Appendix G Warranty InformationFCC Statement Appendix H Regulatory InformationWireless-G Exterior Access Point Wireless-G Exterior Access Point Wireless-G Exterior Access Point Wireless-G Exterior Access Point Dual-Band Wireless Access Point Linksys Appendix I Contact InformationNeed to contact Linksys? Information section in this Guide
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