Примечания к выпуску для Cisco Cisco Aironet 350 Wireless LAN Client Adapter
7
Release Notes for Cisco Aironet PCM/LMC/PCI Client Adapter Firmware, Version 4.25.30
OL-2411-01
New and Changed Information
Step 17
Find the location of the new firmware image in the Open window.
Step 18
Click the new firmware image file (*.img) so it appears in the Name box at the bottom of the Open
window.
window.
Step 19
Click OK. If the selected image is loaded successfully into the client adapter’s Flash memory, a
“Firmware Upgrade Complete!” message appears on the Load New Firmware screen.
“Firmware Upgrade Complete!” message appears on the Load New Firmware screen.
New and Changed Information
This section describes new and changed information for release 4.25.30 of the Cisco Aironet client
adapter firmware.
adapter firmware.
Ability to Periodically Scan for a Better Access Point Added to ACU
Firmware release 4.25.30 enables the client to look for a better access point if its signal strength becomes
low and to switch associations if it finds one. This feature is selectable in ACU through the Periodically
Scan For A Better Access Point parameter on the RF Network screen.
low and to switch associations if it finds one. This feature is selectable in ACU through the Periodically
Scan For A Better Access Point parameter on the RF Network screen.
Note
This parameter is available only if your client adapter is using ACU version 5.02.005 or greater.
Ability to Select Clear Channel Assessment (CCA)
Firmware release 4.25.30 provides the ability to determine whether the channel on which your client
adapter will operate is clear prior to the transmission of data. This feature is selectable in ACU through
the Clear Channel Assessment parameter on the RF Network screen. The following methods are
available from the parameter’s drop-down list in ACU:
adapter will operate is clear prior to the transmission of data. This feature is selectable in ACU through
the Clear Channel Assessment parameter on the RF Network screen. The following methods are
available from the parameter’s drop-down list in ACU:
•
Firmware Default (XXX) - The CCA mechanism reports 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. For example, the CCA default value for PCM/LMC/PCI card firmware is Car/Cor, and
the default value for mini PCI card firmware is ED.
default value of the client adapter’s firmware. The firmware’s CCA default value is shown in
parentheses. For example, the CCA default value for PCM/LMC/PCI card firmware is Car/Cor, and
the default value for mini PCI card firmware is ED.
•
Carrier/Correlation (Car/Cor) - The CCA mechanism reports 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.
detection of a direct-sequence spread spectrum (DSSS) signal. This signal may be above or below
the ED threshold.
•
Energy Detect (ED) - The CCA mechanism reports that the channel is busy upon detection of any
energy above the ED threshold.
energy above the ED threshold.
•
ED or Car/Cor - The CCA mechanism reports that the channel is busy upon detection of a DSSS
signal or any energy above the ED threshold.
signal or any energy above the ED threshold.
Note
This parameter is available only if your client adapter is using ACU version 5.02.005 or greater.