Nortel 120 Using Manual page 84

84 System configuration management
Beacon Interval—The rate at which beacon signals are transmitted from
the access point. Using the beacon signals, wireless clients can maintain
contact with the access point. They can also carry power-management
information. (Range: 20-1000 TUs; Default: 100 TUs)
Data Beacon Rate—The rate at which stations in sleep mode must wake
up to receive broadcast/multicast transmissions.
Known also as the Delivery Traffic Indication Map (DTIM) interval, it indicates
how often the MAC layer forwards broadcast/multicast traffic, which is
necessary to wake up stations that are using Power Save mode. The default
value of 2 indicates that the access point saves broadcast/multicast frames
for the Basic Service Set (BSS) and forwards them after every second
beacon. Using smaller DTIM intervals delivers broadcast and multicast
frames or both in a more timely manner, causing stations in Power Save
mode to wake up more often and drain power faster. Using higher DTIM
values reduces the power used by stations in Power Save mode, but delays
the transmission of broadcast and multicast frames or both.
(Range: 1-255 beacons; Default: 1 beacon)
Fragmentation Length—Configures the minimum packet size that can be
fragmented when passing through the access point. 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 speeds 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. (Range:
256-2 346 bytes; Default: 2 346 bytes)
RTS Threshold—Sets the packet size threshold at which a Request to
Send (RTS) signal must be sent to a receiving station prior to the sending
station starting communications. The access point sends RTS frames to a
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 notify the
sending station that it can start sending data.
Copyright © 2006, Nortel Networks
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WARNING
Nortel recommends that you do not change this value as it can
cause interoperability issues with wireless clients.
BAP120
Using the Nortel Business Access Point 120
NN47921-301 01.01 Standard
1.0 August 2006
Nortel Networks Confidential