Cisco Aironet Installation And Configuration Manual page 80

Setting RF Network Parameters
Table 5-3
Parameter
Clear Channel Assessment
Cisco Aironet Wireless LAN Client Adapters Installation and Configuration Guide for Windows
5-12
RF Network Parameters (continued)
Description
Specifies the method that determines whether the channel on which
your client adapter will operate is clear prior to the transmission of
data.
Options: Firmware Default (XXX), Carrier/Correlation (Car/Cor),
Default: Firmware Default (XXX)
Method
Firmware Default (XXX)
Carrier/Correlation
(Car/Cor)
Energy Detect (ED)
ED or Car/Cor
Note
Energy Detect (ED), or ED or Car/Cor
Description
The Clear Channel Assessment (CCA)
mechanism will report that the channel is
busy based on the default value of the
client adapter's firmware. The firmware's
CCA default value is shown in
parentheses.
Note
The CCA mechanism will report that the
channel is busy upon detection of a
direct-sequence spread spectrum (DSSS)
signal. This signal may be above or below
the ED threshold.
The CCA mechanism will report that the
channel is busy upon detection of any
energy above the ED threshold.
The CCA mechanism will report that the
channel is busy upon detection of a DSSS
signal or any energy above the ED
threshold.
This parameter is available only for 2.4-GHz client adapters
using PCM/LMC/PCI card firmware version 4.25.30 or greater
(or mini PCI card firmware version 5.00.03 or greater).
Chapter 5 Configuring the Client Adapter
The CCA default value for
PCM/LMC/PCI card firmware is
Car/Cor; the default value for mini
PCI card firmware is ED.
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