Table 14: Radio Settings - D-Link DWL-8600AP Administrator's Manual

D-Link UAP
Table 14 describes the fields and configuration options for the Radio Settings page
Field Description
Radio Select Radio 1 or Radio 2 to specify which radio to configure. The rest of the settings on this tab
apply to the radio you select in this field. Be sure to configure settings for both radios.
Radio 1 operates in the 5 GHz band (802.11a/n), and Radio 2 operates in the 2.4 GHz band
(802.11b/g/n)
Status (On/Off) Specify whether you want the radio on or off by clicking On or Off.
If you turn off a radio, the AP sends disassociation frames to all the wireless clients it is currently
supporting so that the radio can be gracefully shutdown and the clients can start the association
process with other available APs.
Mode The Mode defines the Physical Layer (PHY) standard the radio uses.
Select one of the following modes for each radio interface:
•
• IEEE
• IEEE
• IEEE
• 5 GHz IEEE 802.11n
• 2.4 GHz IEEE 802.11n
Channel Select the Channel.
The range of available channels is determined by the mode of the radio interface and the country
code setting. If you select Auto for the channel setting, the AP scans available channels and selects
a channel where no traffic is detected.
The
Each mode offers a number of channels, depending on how the spectrum is licensed by national
and transnational authorities such as the Federal Communications Commission (FCC) or the
International Telecommunication Union (ITU-R).
Channel Bandwidth The 802.11n specification allows a 40-MHz-wide channel in addition to the legacy 20-MHz channel
(802.11n modes only) available with other modes. The 40-MHz channel enables higher data rates but leaves fewer
channels available for use by other 2.4 GHz and 5 GHz devices.
Set the field to 20-MHz to restrict the use of the channel bandwidth to a 20-MHz channel.
Primary Channel This setting can be changed only when the channel bandwidth is set to 40 MHz. A 40-MHz channel
(802.11n modes only) can be considered to consist of two 20-MHz channels that are contiguous in the frequency domain.
These two 20-MHz channels are often referred to as the Primary and Secondary channels. The
Primary Channel is used for 802.11n clients that support only a 20-MHz channel bandwidth and for
legacy clients.
Select one of the following options:
• Upper—Set the Primary Channel as the upper 20-MHz channel in the 40-MHz band.
• Lower—Set the Primary Channel as the lower 20-MHz channel in the 40-MHz band.
Short Guard Interval This field is available only if the selected radio mode includes 802.11n.
Supported
The guard interval is the dead time, in nanoseconds, between OFDM symbols. The guard interval
prevents Inter-Symbol and Inter-Carrier Interference (ISI, ICI). The 802.11n mode allows for a
reduction in this guard interval from the a and g definition of 800 nanoseconds to 400 nanoseconds.
Reducing the guard interval can yield a 10% improvement in data throughput.
Select one of the following options:
• Yes—The AP transmits data using a 400 ns guard Interval when communicating with clients that
• No—The AP transmits data using an 800 ns guard interval.
Page 44 Modifying Radio Settings

Table 14: Radio Settings

Note: The modes available depend on the country code setting and the radio selected.
IEEE 802.11a
802.11b/g
802.11a/n
802.11b/g/n
channel defines the portion of the radio spectrum the radio uses for transmitting and receiving.
also support the short guard interval.
Software User Manual
12/10/09
34CSFP6XXUAP-SWUM100-D13