Advanced Properties

The Advanced tab from the USRobotics Properties allows you to view and change the values of the available properties.

To access the Advanced tab:

To view the available settings for a given property, click the name of the property in the Property list. Then click the down arrow in the Value list.

To change a property setting, click an option in the Value list or type a new value, as appropriate (selection options are different for different properties).

BSS PLCP Header

The BSS PLCP Header property is used to set the header type used for CCK rates. The type can be Long or Auto (short/long).

Auto (Short/Long) (default)

Long

Fragmentation Threshold

The maximum size in bytes at which packets are fragmented and transmitted a piece at a time instead of all at once. Available values range from 256 to 2346. The default value is 2346.

IBSS 54g Mode

IBSS 54g Mode is used to set the connection type in an ad hoc network. The following options are available:

54g - Auto (default)

54g - Performance

802.11b Only

IBSS 54g Protection Mode

A mechanism of prefixing each OFDM data frame with a request to send/clear to send (RTS/CTS) complimentary code keying (CCK) frame sequence. The duration fields of the RTS and CTS frames should allow the IEEE 802.11b node to correctly set its network allocation vector (NAV) and avoid collisions with the subsequent OFDM frames. As required for Wi-Fi®, protection mechanisms are enabled automatically whenever an IEEE 802.11b STA joins the BSS. If no IEEE 802.11b STA joins, then no protection mechanism is used and full IEEE 802.11g performance is attained.

Auto (default)

Disabled

IBSS Channel Number

The IBSS Channel Number property selects the independent basic service set (IBSS) channel number on which to operate when WZC is managing your wireless networks. The default setting is 11.

Locally Administered MAC Address

Locally Administered MAC Address is used to override the MAC address of the . The Locally Administered MAC Address is a user-defined MAC address that is used in place of the MAC address originally assigned to the network adapter. Every adapter in the network must have its own unique MAC address. This locally administered address consists of a 12-digit hexadecimal number.

Value Assigns a unique node address for the adapter.

Not Present (Default). Uses the factory-assigned node address on the adapter.

The appropriate assigned ranges and exceptions for the locally administered address include the following:

Power Output

The power output property allows users to reduce the power output of the radio and therefore, the noise level, if excessive noise is a problem.

100% (default)

25%

50%

75%

Power Save Mode

Power Save Mode is used to put the enabled computer into the IEEE 802.11 Power Save mode. In Power Save mode, the radio is periodically powered down to conserve power. When the radio is in Power Save mode, packets are stored in the access point until the radio comes on. Power Save Fast allows full throughput with power savings.

Disabled

Enabled

Fast (default)

Rate

This property allows you to specify the rate (in Mbit/s) at which data is transmitted. The possible values are: 1, 2, 5.5, 6, 9, 11, 12, 18, 24, 36 48, and 54 . The default is set to Use best Rate. This setting automatically adjusts the transmission rate to the optimal rate based on the capabilities of the other wireless clients and access points.

Note: The default value for this property is set for maximum performance. Therefore, it is not recommended for home users to change the value. Only network administrators or technicians with wireless LAN experience should attempt to make any changes.

Roam Tendency

This property adjusts the roaming thresholds for the .

Aggressive Roams to wireless networks having a signal strength at least 10 dB greater than the current one.

Conservative Roams to wireless networks having a signal strength at least 30 dB greater than the current one.

Moderate (default) Roams to wireless networks having a signal strength at least 20 dB greater than the current one.

Roaming Decision

This property sets the behaviour of the when roaming among access points.

Default (default)

Optimize Bandwidth

Optimize Distance

RTS Threshold

RTS Threshold sets the maximum number of frames allowed in a data packet before the Request To Send/Clear To Send Handshake is used. When the RTS Threshold is exceeded, the adapter sends a Request To Send message to the access point prior to sending data. When the access point receives the the Request To Send message, it broadcasts a Clear To Send message. This message tells the requesting adapter to send its message while telling other adapters to refrain from sending data while the requesting adapter sends its message. In environments where there are frequent data collisions between wireless adapters, decreasing the RTS threshold can decrease collisions and improve network performance. However, each RTS/CTS handshake adds communication overhead that can decrease network performance.

The default value is 2347. The range is 0 to 2347.

WMM

Wi-Fi Multimedia (WMM™). The WMM property enables quality of service for audio, video, and voice applications over a wireless network by prioritizing streams of content and optimizing the way the network allocates bandwidth among competing applications.

Auto When the wireless client connects to the access point, and the access point has Unscheduled Automatic Power Save Delivery (UAPSD) enabled, the wireless client is allowed to enter Power Save mode.

Enabled (default) The wireless client enters Power Save mode for WMM associations independent of whether the access point has UAPSD enabled or disabled.

Disabled The wireless client does not have WMM association.