Bedienungsanleitung ZYXEL ZYAIR B-4000 WLAN-HOTSPOT-GATEWAY

[. . . ] ZyAIR B-4000 Hot Spot Gateway User's Guide Version 1. 00 July 2003 ZyAIR B-4000 Hot Spot Gateway Copyright Copyright © 2003 by ZyXEL Communications Corporation. The contents of this publication may not be reproduced in any part or as a whole, transcribed, stored in a retrieval system, translated into any language, or transmitted in any form or by any means, electronic, mechanical, magnetic, optical, chemical, photocopying, manual, or otherwise, without the prior written permission of ZyXEL Communications Corporation. Published by ZyXEL Communications Corporation. Disclaimer ZyXEL does not assume any liability arising out of the application or use of any products, or software described herein. [. . . ] This setting, always a multiple of the beacon period, determines how often the beacon contains a delivery traffic indication message (DTIM). The DTIM tells client devices that are set to power-save that a packet is waiting for them. The DTIM Interval's valid range is 1 to 65535. The basic transfer rates should be set depending on the speed of your wireless network. The default setting is 1-2-5. 5-22 (Mbps). Select either Short Preamble or Long Preamble. Select Left Antenna if your device has removable antennas and you install a high-gain antenna on the connector on the left (when you look at the device's rear panel). Select Right Antenna if your device has removable antennas and you install a high-gain antenna on the connector on the right (when you look at the device's rear panel). Select Diversity Antenna (default) to have the device use the antenna that receives the best signal. Transmission Rates Preamble Type Antenna Selection Wireless LAN 10-7 ZyAIR B-4000 Spot Gateway Table 10-1 Wireless LABEL Authentication Method DESCRIPTION Select Open System to allow any device to authenticate and then attempt to communicate with the ZyAIR. Using open authentication, any wireless device can authenticate with the ZyAIR, but the device can only communicate if its WEP keys match the ZyAIR. Devices not using WEP do not attempt to authenticate with a ZyAIR that is using WEP. Open authentication does not rely on a RADIUS server on your network. Select Shared Key to have the ZyAIR use shared key authentication. The ZyAIR sends an unencrypted challenge text string to any device attempting to communicate with the ZyAIR. The device-requesting authentication encrypts the challenge text and sends it back to the ZyAIR. If the challenge text is encrypted correctly, the ZyAIR allows the requesting device to authenticate. However, both the unencrypted challenge and the encrypted challenge can be monitored; thus leaving the ZyAIR open to attack from an intruder who calculates the WEP key by comparing the unencrypted and encrypted text strings. Because of this weakness, shared key authentication can be less secure than open authentication. Like open authentication, shared key authentication does not rely on a RADIUS server on your network. Select Both to allow subscribers to communicate with or without data encryption. SSID Broadcast Select Enable to allow devices that do not specify an SSID (Service Set Identity) to associate with the ZyAIR. Select Disable to stop devices that do not specify an SSID (devices that are "broadcasting" in search of an access point to associate with) from associating with the ZyAIR. [. . . ] 4-1 FCC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Frequency-Hopping Spread Spectrum Filename Convention Note for web configurator. . . . . . . . . . . . . . . . . . . . . . . . . 12-1 Firmware Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]