Netgear WAG311 Guide d'installation télécharger pdf (Page 58)

Installation Guide for the NETGEAR Dual Band Wireless PCI Adapter WAG311

B-8 Wireless Networking Basics

The radio frequency channels used in 802.11b/g networks are listed in Table B-2:

Note: The available channels supported by the wireless products in various countries are different.

For example, Channels 1 to 11 are supported in the U.S. and Canada, and Channels 1 to 13 are

supported in Europe and Australia.

The preferred channel separation between the channels in neighboring wireless networks is 25

MHz (5 channels). This means that you can apply up to three different channels within your

wireless network. There are only 11 usable wireless channels in the United States. It is

recommended that you start using channel 1 and grow to use channel 6, and 11 when necessary, as

these three channels do not overlap.

802.11a Legal Power Output and Wireless Channels

IEEE 802.11a utilizes 300 MHz of bandwidth in the 5 GHz Unlicensed National Information

Infrastructure (U-NII) band. Though the lower 200 MHz is physically contiguous, the FCC has

divided the total 300 MHz into three distinct domains, each with a different legal maximum power

output. Below is a table of summary for different regulatory domains.

Table B-2: 802.11b/g Radio Frequency Channels

Channel Center Frequency Frequency Spread

1 2412 MHz 2399.5 MHz - 2424.5 MHz

2 2417 MHz 2404.5 MHz - 2429.5 MHz

3 2422 MHz 2409.5 MHz - 2434.5 MHz

4 2427 MHz 2414.5 MHz - 2439.5 MHz

5 2432 MHz 2419.5 MHz - 2444.5 MHz

6 2437 MHz 2424.5 MHz - 2449.5 MHz

7 2442 MHz 2429.5 MHz - 2454.5 MHz

8 2447 MHz 2434.5 MHz - 2459.5 MHz

9 2452 MHz 2439.5 MHz - 2464.5 MHz

10 2457 MHz 2444.5 MHz - 2469.5 MHz

11 2462 MHz 2449.5 MHz - 2474.5 MHz

12 2467 MHz 2454.5 MHz - 2479.5 MHz

13 2472 MHz 2459.5 MHz - 2484.5 MHz

1 2 ... 53 54 55 56 57 58 59 60 61 62 63 ... 78 79

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Netgear WAG311 Guide d'installation Page 58