User's Manual

Table Of Contents
90 Operation
Chapter 4 - System Configuration
802.11b+g: Both 802.11b and 802.11g clients can communicate with the
access point (up to 54 Mbps).
802.11b only: Both 802.11b and 802.11g clients can communicate with the
access point, but 802.11g clients can only transfer data at 802.11b standard
rates (up to 11 Mbps).
802.11g only: Only 802.11g clients can communicate with the access point (up
to 54 Mbps).
Auto Channel Select – Enables the access point to automatically select an
unoccupied radio channel. (Default: Enabled)
Preamble – Sets the length of the signal preamble that is used at the start of a
data transmission. (Default: Long)
Long: Sets the preamble to long (192 microseconds). Using a long preamble
ensures the access point can support all 802.11b and 802.11g clients.
Short or Long: Sets the preamble according to the capability of clients that are
currently associated. Uses a short preamble (96 microseconds) if all associated
clients can support it, otherwise a long preamble is used. The access point can
increase data throughput when using a short preamble, but will only use a
short preamble if it determines that all associated clients support it.
Beacon Interval The rate at which beacon signals are transmitted from the
access point. The beacon signals allow wireless clients to maintain contact with
the access point. They may 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 will save all broadcast/multicast frames for the Basic
Service Set (BSS) and forward them after every second beacon. Using smaller
DTIM intervals delivers broadcast/multicast frames 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/multicast frames.
(Range: 1-255 beacons; Default: 1 beacon)