Maximum Station Data Rate; Beacon Interval (20-1000); Dtim Period (1-16384); Rts Threshold (0-2347) - Nortel 2220 Using Manual

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[Final Draft—Nortel Confidential]

Chapter 2 System Configuration

Maximum Station Data Rate

Select the appropriate data rate from the drop-down list for the data transfer speed

running on your network. (Default: 54 Mbps)

Sets the beacon signal interval. The beacon signals allow the wireless devices to

maintain contact with each other. They may also carry power-management

information. (Default: 100 TU)

Sets the Delivery Traffic Indication Map (DTIM) packet interval value. The DTIM

indicates how often the MAC layer forwards multicast traffic. This parameter is

necessary to wake up stations that are using Power Save mode.

The DTIM is the interval between two synchronous frames with broadcast

information. If you set the value to 2, the access point will save all multicast

frames for the BSS and forward them after every second beacon. Having smaller

DTIM intervals delivers multicast frames in a more timely manner, causing

stations in Power Save mode to wake up more often and drain power faster.

Having higher DTIM values reduces the power used by stations in Power Save

mode, but delays the transmission of multicast frames. (Default: 5 Beacons)

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 Request to Send (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: 2347)

Using the Nortel Networks Wireless LAN Access Point 2220

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