Cisco Cisco Aironet Wireless LAN Client Spezifikationen PDF herunterladen (Seite 73)

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Cisco Aironet Wireless LAN Client Adapters Installation and Configuration Guide for Linux

OL-1376-02

Chapter 5 Advanced Configuration

Overview

Channel Specifies which frequency your client adapter uses as the channel for

communications. These channels conform to the IEEE 802.11 standard

for your regulatory domain.

• In infrastructure mode, this parameter is set automatically and

cannot be changed. The client adapter listens to the entire

spectrum, selects the best access point to associate to, and uses the

same frequency as that access point.

• In ad hoc mode, the channel of the client adapter that is originating

the ad hoc cell must be configured. Immediately after being

configured, the client card scans the spectrum for an ad hoc cell

already established with the same SSID. If it finds one, it uses the

channel of that cell. If the client does not find a pre-established cell

within the timeout period, it establishes one at the configured

frequency.

Range: Dependent on regulatory domain.

Example: 1 to 11 (2412 to 2462 MHz) in North America.

Default: Dependent on regulatory domain.

Example: 6 (2437 MHz) in North America.

Note See Appendix A, “Technical Specifications,” for a list of

channel identifiers, channel center frequencies, and regulatory

domains for each channel.

Transmit Power Defines the level at which your client adapter transmits power. This

value must not be higher than that allowed by your country’s regulatory

agency (FCC in the U.S., DOC in Canada, ETSI in Europe, MKK in

Japan, and so on). When World Mode is enabled, only the transmit

power levels supported by the country of operation’s regulatory agency

are available.

Range: 1, 5, 15, 20, 30, 50, or 100 mW (30 mW is the maximum

power level supported by 340 series client adapters).

Default: The maximum level allowed by your country’s regulatory

agency.

Note 15 mW is supported only by 340 series client adapters, 20 and

100 mW is supported only by 350 series client adapters.

Note Reducing the transmit power level conserves battery power but

decreases radio range.

Table 5-4 RF Network Parameters (continued)

Parameter Description

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