Motorola AP-7131N-FGR, Product Reference Manual

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Network Management 5-65
Support Short
Preamble The preamble is approximately 8 bytes of packet header generated
by the access point and attached to a packet prior to transmission
from the 802.11b radio. The preamble length for 802.11b
transmissions is rate dependant. A short preamble is 50% shorter
than a long preamble. Leave the checkbox unselected if in a mixed
MU/AP environment, as MUs and the access point are required to
have the same RF Preamble settings for interoperability. The
default is Disabled. The preamble length for 802.11a and 802.11g
transmissions is the same, with no long or short preamble lengths.
RTS Threshold RTS allows the access point to use RTS (Request To Send) on
frames longer than the specified length.
The default is 2341bytes.
Set RF QoS Click the Set RF QoS button to display the Set RF QOS screen to
set QoS parameters for the radio. Do not confuse with the QoS
configuration screen used for a WLAN. The Set RF QoS screen
initially appears with default values displayed.
Select manual from the Select Parameter set drop-down menu
to edit the CW min and CW max (contention window), AIFSN
(Arbitrary Inter-Frame Space Number) and TXOPs Time for each
Access Category. These are the QoS policies for the 802.11a/n or
802.11b/g/n radio, not the QoS policies configured for the WLAN
(as created or edited from the
Quality of Service Configuration
screen).
Motorola recommends only advanced users manually set these
values. If the type of data-traffic is known, use the drop-down
menu to select an option representative of the intended radio band
support. Wifi represents multimedia traffic, default is typical data
traffic and voice is for “Voice-Over-IP” supported wireless devices.
Click OK to implement the selected QoS values and return to the
802.11a/n or 802.11b/g/n radio configuration screen. Clicking
Cancel reverts the screen to the last saved configuration.