User guide

C HAPTER 6 | Wireless Configuration
Advanced Settings
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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.
If the RTS threshold is set to 0, the access point always sends RTS
signals. If set to 2347, the access point never sends RTS signals. If set
to any other value, and the packet size equals or exceeds the RTS
threshold, the RTS/CTS (Request to Send / Clear to Send) mechanism
will be enabled.
The access points contending for the medium may not be aware of each
other. The RTS/CTS mechanism can solve this “Hidden Node Problem.”
(Range: 1-2347 bytes: Default: 2347 bytes)
◆ TX Power — Adjusts the power of the radio signals transmitted from
the access point. The higher the transmission power, the farther the
transmission range. Power selection is not just a trade off between
coverage area and maximum supported clients. You also have to
ensure that high-power signals do not interfere with the operation of
other radio devices in the service area.
◆ Short Preamble — Sets the length of the signal preamble that is used
at the start of a data transmission. Use a short preamble (96
microseconds) to increase data throughput when it is supported by all
connected 802.11g clients. Use a long preamble (192 microseconds) to
ensure all 802.11b clients can connect to the network.
(Default: Disabled)
◆ Short Slot — Sets the basic unit of time the access point uses for
calculating waiting times before data is transmitted. A short slot time
(9 microseconds) can increase data throughput on the access point, but
requires that all clients can support a short slot time (that is, 802.11g-
compliant clients must support a short slot time). A long slot time
(20 microseconds) is required if the access point has to support
802.11b clients. (Default: Enabled)
◆ TX Burst — A performance enhancement that transmits a number of
data packets at the same time when the feature is supported by
compatible clients. (Default: Enabled)
◆ Packet Aggregate — A performance enhancement that combines data
packets together when the feature is supported by compatible clients.
(Default: Enabled)
WI-FI MULTIMEDIA The Wireless-N Access Point/Repeater implements Quality of Service (QoS)
using the Wi-Fi Multimedia (WMM) standard. Using WMM, the access point
is able to prioritize traffic and optimize performance when multiple
applications compete for wireless network bandwidth at the same time.
WMM employs techniques that are a subset of the developing IEEE 802.11e
QoS standard and it enables access points to interoperate with both WMM-
enabled clients and other devices that may lack any WMM functionality.