Proxim ORiNOCO AP-4900M User Manual page 60

Advanced Configuration
Interfaces
– For 802.11b/g -- Auto Fallback, 1, 2, 5.5, 6, 9, 11, 12, 18, 24, 36, 48, 54 Mbits/sec
– For 802.11g-wifi -- Auto Fallback, 1, 2, 5.5, 6, 9, 11, 12, 18, 24, 36, 48, 54 Mbits/sec
NOTE: 802.11g-wifi has been defined for Wi-Fi testing purposes. It is not recommended for use in your wireless
network environment.
NOTE: Turbo mode is supported in 802.11a mode in the FCC regulatory domain only. If turbo mode is enabled,
then this is displayed in the web UI and the transmit speeds and channels pull-down menus are updated
with the valid values.
• DTIM Period: The Deferred Traffic Indicator Map (DTIM) Period determines when to transmit broadcast and multicast
packets to all clients. If any clients are in power save mode, packets are sent at the end of the DTIM period. This
parameter supports a range between 1 and 255; it is recommended to leave the DTIM at its default value unless
instructed by technical support. Higher values conserve client battery life at the expense of network performance for
broadcast or multicast traffic.
• RTS/CTS Medium Reservation: This parameter affects message flow control and should not be changed under
normal circumstances. Range is 0 to 2347. When set to a value between 0 and 2347, the Access Point uses the
RTS/CTS mechanism for packets that are the specified size or greater. When set to 2347 (the default setting),
RTS/CTS is disabled. See
• Antenna Gain: This parameter modifies the sensitivity of the radio card when detecting radar signals in accordance
with Dynamic Frequency Selection/Radar Detection (DFS/RD)
is fixed by the regulatory codes in the country of operation, and that a variety of antennas with different gains may be
attached to the unit, adjust this threshold to account for higher than expected antenna gains and avoid false radar
detection events. Set this parameter to a value between 0 and 35. The default value is 0.
• Wireless Service Status: Select Shutdown to shutdown the wireless service on a wireless interface, or to Resume
to resume wireless service. See
• Load Balancing Max Clients: Load balancing distributes clients among available access points. Enter a number
between 1 and 63 to specify the maximum number of clients to allow.
• Channel Blacklist Table: The Channel Blacklist table contains all available channels. It can be used to manually
blacklist channels, and it also reflects channels that have been automatically blacklisted by the
Selection/Radar Detection (DFS/RD)
• Wireless Distribution System: A Wireless Distribution system can be used to establish point-to-point (i.e. wireless
backhaul) connections with other access points. See
information.
Dynamic Frequency Selection/Radar Detection (DFS/RD)
In order to prevent interference with radar systems and other devices that occupy the 5 GHz band, 802.11a APs certified
in the ETSI (Europe) and TELEC (Japan) regulatory domains (see
frequency band select an operating channel through a combination of Auto Channel Select (ACS) and Dynamic
Frequency Selection (DFS)/Radar Detection (RD).
During boot-up, ACS scans the available channels and selects the best channel. Once a channel is selected, the AP
performs a channel availability check for 60 seconds to ensure that there is no radar on the channel and then
commences normal operation. When the AP enters normal operation, DFS works in the background to detect radar
interference on that channel. If interference is detected, the AP sends a trap, disassociates all clients, blacklists the
channel, and reboots. After it reboots, ACS re-scans and selects a better channel that is free of interference.
If ACS is disabled, only channels in the lower frequency band are available for use:
• 36: 5.18 GHz (default)
• 40: 5.200 GHz
• 44: 5.220 GHz
• 48: 5.240 GHz
RTS/CTS Medium Reservation
Wireless Service Status
function. See
for more information.
requirements. Given that the radar detection threshold
for more information.
Channel Blacklist Table
Wireless Distribution System (WDS)
Affected Countries) and operating in the middle
AP-4000/4000M/4900M User Guide
Dynamic Frequency
for configuration information.
for configuration
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