Configuring General Wireless Settings

NetScreen-5GT Wireless security device contains a radio transmitter/receiver with a frequency range of 2.4 GHz to 2.4835 GHz, and supports the IEEE 802.11b and 802.11g standards. When you first deploy the NetScreen-5GT Wireless device on your network, the radio transmitter/receiver is configured with default settings designed to work in most networking environments.

You can edit the default values for the following radio settings:

The following topics will detail each radio settings:

Configuring Antennas

You can use one antenna or a pair of antennas on the NetScreen-5GT Wireless security device. Select the antenna option that meets your network needs and that corresponds to the actual physical antenna configuration on the device.

To configure the antenna, in the device navigation tree, select Wireless Settings then select one of the antenna configurations:

Note: On the NetScreen-5GT Wireless security device, antenna A is nearest the power connector port.

When importing wireless settings from a security device, Network and Security Manager (NSM) automatically displays the antenna settings configured on the physical device. Before activating a modeled wireless security device, however, you must ensure that the antenna setting you select in the NSM UI matches the actual antenna configuration on the physical device. For example, if you model the device using antenna A as a single antenna providing 2–dBi omnidirectional coverage, you or the device administrator must have connected an antenna to antenna port A on the physical device before you activate that device.

Configuring Channels

The wireless security device uses channels to send and receive wireless traffic. The device uses the same channel for all basic service sets (BSSs), which share the same overall bandwidth, and distinguishes traffic from different BSSs by the SSID number.

By default, the wireless security device automatically selects the appropriate channel based on the country code. To select a specific channel, in the device navigation tree, select Wireless Settings and change the Channel for Wireless AP Radio setting to Channel Number, and then enter the channel number you want the device to use. To enable the device to use additional channels that might be available in your country, select Extended Channel Mode.

The regulatory domain for channel assignments is not configurable, and is preset as one of the following:

Note: Although you can select the Extended Channel Mode option when the regulatory domain is WORLD and the selected country code is USA, there are no extended channels in the USA.

Configuring Operation Mode Settings

The NetScreen-5GT Wireless supports both 802.11b and 802.11g operation modes, either simultaneously (default setting) or exclusively. To configure the operation mode, in the device navigation tree, select Wireless Settings and then select one of the following modes:

Note: We recommend you enable CTS protection (see Configuring Control Frame Protection section in Configuring Advanced Wireless Settings) to avoid collisions when supporting 802.11b and 802.11g operation modes.

Configuring Transmission Settings

Use the transmission settings to control the power and rate used by the wireless interfaces. To configure the transmission settings, in the device navigation tree, select Wireless Settings, and then edit the default values for the following settings:

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