3Com 3CRWDR200A-75 - Manual (Page 63)

Wireless Settings 63
Auto-Fallback feature. Auto-Fallback will negotiate the best possible
connection speed between the Router and a wireless client. The default
value is Auto (Default).
Transmission Power (Transmit Power Control) The greater the
transmission power used, the larger the area a wireless network covers.
To minimize the likelihood of eavesdropping by unauthorized wireless
users, do not use more transmission power than necessary to cover the
range needed by your wireless network. Try using the Router at different
levels of transmission power, and determine how much power is needed
to reach the wireless client, such as a PC or access point, that is farthest
from the Router. Then select the appropriate level, Full (Default), Half,
Quarter, Eighth, or Min, from the drop-down menu. The default is Full
(Default).
CTS Protection Mode CTS (Clear-To-Send) Protection Mode should be
set to Auto (Default). The Router will automatically use CTS Protection
Mode when your Wireless-G products are experiencing severe problems
and are not able to transmit to the Router in an environment with heavy
802.11b traffic. This function boosts the Router's ability to catch all
Wireless-G transmissions but will severely decrease performance. If you
do not want to use CTS Protection Mode at all, select Disabled.
XR Mode The Extended Range mode can be enabled to further extend
the wireless coverage to eliminate dead spots or corners in your office.
Frame Burst Mode Enabling this option should provide your network
with greater performance, depending on the manufacturer of your
wireless products. If you are not sure how to use this option, keep the
default, Enabled.
Beacon Interval The default value is 100. The Beacon Interval value
indicates the frequency interval of the beacon. A beacon is a packet
broadcast by the Router to synchronize the wireless network.
DTIM Interval This value indicates the interval of the Delivery Traffic
Indication Message (DTIM). A DTIM field is a countdown field informing
clients of the next window for listening to broadcast and multicast
messages. When the Router has buffered broadcast or multicast
messages for associated clients, it sends the next DTIM with a DTIM
Interval value. Its clients hear the beacons and awaken to receive the
broadcast and multicast messages. The default value is 1.