SMC Networks SMC2552W-G2-17 - Manual (Page 98)

Radio Interface
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Super G – The Atheros proprietary Super G performance enhancements
are supported by the access point. These enhancements include bursting,
compression, fast frames and dynamic turbo. Maximum throughput ranges between
40 to 60 Mbps for connections to Atheros-compatible clients. (Default: Disabled)
Radio Mode
– Selects the operating mode for the 802.11g wireless interface.
(Default: 802.11b+g)
• 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).
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 asscociated. 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)
Multicast Data Rate
– The maximum data rate at which the access point transmits
multicast and broadcast packets on the wireless interface. (Options: 24, 12, 6
Mbps; Default: 6 Mbps)