3Com WL-450, WL-463, WL-462 manual Security

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Fragmentation of the PDUs (Package Data Unit) can increase the reliability of transmissions because it increases the probability of a successful transmission due to smaller frame size. If there is significant interference present, or collisions due to high network utilization, try setting the fragment size to send smaller fragments. This will speed up the retransmission of smaller frames. However, it is more efficient to set the fragment size larger if very little or no interference is present because it requires overhead to send multiple frames. (Default: 2346)

RTS Threshold (0-2347)—Set the RTS (Request to Send) frame length. You may configure the access point to initiate an RTS frame sequence always, never, or only on frames longer than a specified length. If the packet size is smaller than the preset RTS threshold size, the RTS/CTS mechanism will not be enabled.

The access point sends RTS frames to a particular receiving station to negotiate the sending of a data frame. After receiving an RTS frame, the station sends a CTS (Clear to Send) frame to acknowledge the right of the sending station to send data frames. The access points contending for the medium may not be aware of each other. The RTS/CTS mechanism can solve this hidden node problem. (Default: 2346)

Preamble Setting (802.11g and 802.11b only)—IEEE 802.11 frames begin with an alternating pattern of 1s and 0s called the preamble, which tells receiving stations that a frame is arriving. This provides time for the receiving station to synchronize to the incoming data stream. Enabling the Short preamble can boost your throughput; however, this can cause interoperability issues. (Default: Long)

Client Access Mode (802.11g only)—802.11g radios can support both 802.11b and 802.11g clients. This option determines which mode the radio will operate in and consequently which clients will be able to connect to the radio interface. The default is to provide information for both 802.11g and 802.11b clients. Higher throughput can be achieved if the option for the 802.11g clients only is selected (since the radio is not required to transmit at the lower 802.11b rates/method).

Data Beacon Rate (802.11g only)—Sets the interval at which a beacon will contain a delivery traffic indicator message (DTIM). The Access Point sends a DTIM to signal clients which are in sleep mode that a message is waiting to be delivered to them. The range for this setting is 1-255 beacons. (Default: 2)

SECURITY

The Security page allows you to set up lower-layer client authentication and data encryption parameters as described below. When you are finished configuring items on this page, click Apply.

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Contents Wireless LAN Access Points 8250/8500/8750 3Com Corporation 350 Campus Drive Marlborough, MA Contents System Configuration Regulatory Compliance Information Index Product Features IntroductionSecurity Performance and ReliabilityManageability Wireless Network Standards FAR-REACHING 802.11GHIGH-PERFORMANCE 802.11A Network Configuration and Planning AD HOC Wireless LANInfrastructure Wireless LAN Infrastructure Wireless LAN for Roaming Wireless PCSTerminology Page Installing the Access Point Installation RequirementsPower Requirements Safety InformationPage Connecting the Standard Antennas Before YOU BeginConnecting Power Using the Power Supply Using a POWER-OVER-ETHERNET LAN Port Checking the LedsMounting on a Wall Plastic anchors and 3 screws Flat Surface Installation Selecting and Connecting a Different Antenna Model Back Power Settings on the Access Point for External Antennas Installing Software UtilitiesPage Using the 3COM Wireless Device Manager Launching a Wireless Device ConfigurationClick Configure Configuration Login Setting the Country CodeUsing the PRE-IP Configuration Wizard Basic Setup Advanced Setup IdentificationDhcp Client Radius Secure WEB Server ConnectionAuthentication Page Field Default Description Filter Control Filtering by VlanClient List Timeout Security FiltersUplink Port MAC Address Filtering Snmp Filtering by Ethernet Protocol TypeAdministration System LOG Radio Settings StatusRadio Interface Page Security Configuring Authentication Configuring EncryptionWPA Configuration WEP Configuration HOW to Setup the Access Point for Radius Authentiction Select Advanced SetupSelect Advanced Setup HOW to Setup the Access Point for WPA with PRE-SHAREDPSK KEYWPA Configuration for Windows XP WEPWPA-PSK AES Troubleshooting Click Configure Client service area to match Where to GO for Help Troubleshoot Online Obtaining Support for Your ProductAccess Software Downloads Contact US Telephone Technical Support and RepairCountry Telephone Number North America Telephone Regulatory Compliance Information Industry Canada IC Emissions Compliance Statement Additional Country Restrictions WL-463, 802.11g Radio Module Safety Compliance Notice Index Radius TCP/IP