Linksys WRE54G Cisco WAP54GP Wireless-G Exterior Access Point User Guide - Page 53

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Appendix A: Troubleshooting

Frequently Asked Questions

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?

Section	Page
Appendix A: Troubleshooting 43	4
Appendix B: Wireless Security 47	4
Appendix C: Upgrading Firmware 50	4
Appendix D: Windows Help 51	4
Appendix E: Glossary 52	4
Appendix F: Specifications 57	4
Appendix G: Warranty Information 59	4
Appendix H: Regulatory Information 60	4
Appendix I: Contact Information 66	4
List of Figures	5
Figure 2-1: Example of a Simple Wireless Network 5	5
Figure 3-1: Front Panel 6	5
Figure 3-2: Bottom Panel 7	5
Figure 3-3: Top Panel 7	5
Figure 3-4: Back Panel 8	5
Figure 3-5: Internal Antenna Pattern (Horizontal Plane) 9	5
Figure 3-6: Radio Coverage of the Access Point to Client Devices 10	5
Figure 3-7: Access Point to Access Point (bridging) Radio Coverage 11	5
Figure 4-1: Mark the Locations of the Two Wall-Mount Slots 12	5
Figure 4-2: Attach the Mounting Plate 12	5
Figure 4-3: Ground the Access Point 13	5
Figure 4-4: Attach the Access Point to the Wall 13	5
Figure 5-1: Login Screen 14	5
Figure 6-1: Setup - Static IP Address 17	5
Figure 6-2: Setup - Automatic Configuration - DHCP 18	5
Figure 6-3: Setup - Time 18	5
Figure 6-4: Wireless - Basic Wireless Settings 19	5
Figure 6-5: Wireless - Wireless Security (Disabled) 21	5
Figure 6-6: Wireless - Wireless Security (WPA-Personal) 21	5
Figure 6-7: Wireless - Wireless Security (WPA2-Personal) 22	5
Figure 6-8: Wireless - Wireless Security (WPA2-Personal Mixed) 22	5
Figure 6-9: Wireless - Wireless Security (WPA-Enterprise) 23	5
Figure 6-10: Wireless - Wireless Security (WPA2-Enterprise) 23	5
Figure 6-11: Wireless - Wireless Security (WPA2 - Enterprise Mixed) 24	5
Figure 6-12: Wireless Security - RADIUS 25	5
Figure 6-13: Wireless Settings - WEP 25	5
Figure 6-14: Wireless - Wireless Connection Control 26	5
Figure 6-1: Select MAC Address from Client Association Table 26	5
Figure 6-15: Wireless - Advanced Wireless 27	6
Figure 6-16: AP Mode 29	6
Figure 6-17: Wireless Repeater 30	6
Figure 6-18: Site Survey 31	6
Figure 6-19: Administration - Management 32	6
Figure 6-20: The Administration - Log 34	6
Figure 6-21: Administration - Factory Default 36	6
Figure 6-22: Administration - Firmware Upgrade 36	6
Figure 6-23: Administration - Reboot 37	6
Figure 6-24: Administration - Config Management 38	6
Figure 6-25: Status - Local Network 39	6
Figure 6-26: Status - Wireless 40	6
Figure 6-27: Status - System Performance 41	6
Figure C-1: Firmware Upgrade 50	6
Chapter 1: Introduction	7
Welcome	7
What’s in this User Guide?	8
Chapter 2: Planning Your Wireless Network	10
Network Topology	10
Roaming	10
Network Layout	10
Example of a Simple Wireless Network	11
Chapter 3: Getting to Know the Wireless-G Exterior Access Point	13
The LEDs	13
The Ports	14
The Reset Button and Ground	15
The Antenna Pattern	16
Chapter 4: Connecting the Wireless-G Exterior Access Point	19
Overview	19
Hardware Installation	19
Chapter 5: Setting Up the Wireless-G Exterior Access Point	21
Overview	21
Accessing the Utility	21
Navigating the Utility	22
Chapter 6: Configuring the Wireless-G Exterior Access Point	24
The Setup Tab	24
The Setup - Time Tab	25
The Wireless - Basic Wireless Settings Tab	26
The Wireless - Wireless Security Tab	28
The Wireless - Wireless Connection Control Tab	33
The Wireless - Advanced Wireless Settings Tab	34
The AP Mode Tab	36
The Administration - Management Tab	39
The Administration - Log Tab	41
The Administration - Factory Default Tab	43
The Administration - Firmware Upgrade Tab	43
The Administration - Reboot Tab	44
The Administration - Config Management Tab	45
The Status - Local Network Tab	46
The Status - Wireless Tab	47
The Status - System Performance Tab	48
Appendix A: Troubleshooting	50
Frequently Asked Questions	50
Appendix B: Wireless Security	56
Security Precautions	56
Security Threats Facing Wireless Networks	56
Appendix C: Upgrading Firmware	59
Appendix D: Windows Help	60
Appendix E: Glossary	61
Appendix F: Specifications	66
Appendix G: Warranty Information	68
Appendix H: Regulatory Information	70

Linksys WRE54G Cisco WAP54GP Wireless-G Exterior Access Point User Guide - Page 53

two main alternatives, Direct Sequence Spread Spectrum DSSS and Frequency Hopping Spread Spectrum

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