Extreme Networks Summit WM User Manual page 98

Configuring the Altitude AP
9 If applicable, click the 802.11a/n tab to modify the radio properties:
10 In the Base Settings section, do the following:
Radio Mode - Click one of the following radio options:
a - Click to enable only the 802.11a mode of the 802.11a/n radio.
a/n - Click to enable both the 802.11a mode and the 802.11n mode of the 802.11a/n radio.
off - Click to disable the 802.11a/n radio.
NOTE
Depending on the radio options you select, some of the radio settings may not be available for configuration.
Channel Width - Click the channel width for the radio:
20MHz - Click to allow 802.11n clients to use the primary channel (20MHz) and non-802.11n
clients, beacons, and multicasts to use the 802.11a radio protocols.
40MHz - Click to allow 802.11n clients that support the 40MHz frequency to use 40MHz,
20MHz, or the 802.11a radio protocols. 802.11n clients that do not support the 40MHz
frequency can use 20MHz or the 802.11a radio protocols and non-802.11n clients, beacons, and
multicasts use the 802.11a radio protocols.
Auto - Click to automatically switch between 20MHz and 40MHz channel widths, depending
on how busy the extension channel is.
DTIM Period - Type the desired DTIM (Delivery Traffic Indication Message) period - the number
of beacon intervals between two DTIM beacons. To ensure the best client power savings, use a
large number. For example, 5. Use a small number to minimize broadcast and multicast delay.
The default value is 5.
Beacon Period - Type the desired time, in milliseconds, between beacon transmissions. The
default value is 100 milliseconds.
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Summit WM User Guide, Software Version 5.3