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http://en.wikipedia.org/wiki/List_of_WLAN_channels

The List of WLAN channels is the legally allowed IEEE 802.11 or more commonly Wi-Fi Wireless LAN channels.

The 802.11 workgroup currently documents use in three distinct frequency ranges, 2.4 GHz, 3.6 GHz and 4.9/5.0 GHz bands.^[1] Each range is divided into multitude of channels. Countries apply their own regulations to both the allowable channels, allowed users and maximum power levels within these frequency ranges. In some countries, such as the United States, licensed Amateur Radio operators may use some of the channels at much higher power for long distance wireless access.

2.4 GHz (802.11b/g/n)

Graphical representation of Wi-Fi channels in 2.4 GHz band

There are 14 channels designated in the 2.4 GHz range spaced 5 MHz apart (with the exception of a 12 MHz spacing before Channel 14). As the protocol requires 25 MHz of channel separation, adjacent channels overlap and will interfere with each other. Consequently, using only channels 1, 6, 11, and 14 is recommended to avoid interference.^[2]

Potential Wireless LAN uses of this range are documented by IEEE 802.11 clauses 18 (802.11b), 19 (802.11g) and 20 (802.11n). IEEE 802.11 clauses 14 and 15 also specify potential uses of this range, but did not see widespread implementation.

Countries apply their own regulations to both the allowable channels, allowed users and maximum power levels within these frequency ranges. Consult your local authorities as these regulations may be out of date as they are subject to change at any time. Most of the world will allow the first thirteen channels in the spectrum.

Earlier, in Spain the only allowable channels were 10-11, and in France 10-13. These restrictions have been removed since, and these countries are currently following the common European policy (channels 1-13).

In the USA, 802.11 operation in the channels 12 and 13 is actually allowed under low powered conditions. The 2.4 GHz Part 15 band in the US allows spread-spectrum operation as long as the 50-dB bandwidth of the signal is within in the range of 2400-2483.5 MHz^[8] which wholly encompasses both channels 12 and 13. A Federal Communications Commission (FCC) document clarifies that only channel 14 is forbidden and furthermore low-power transmitters with low-gain antennas may legally operate in channels 12 and 13.^[9] However, channels 12 and 13 are not normally used in order to avoid any potential interference in the adjacent restricted frequency band, 2483.5-2500 MHz^[10], which is subject to strict emission limits set out in 47 CFR §15.205^[11].

In Canada, 12 channels are available for use, 11 of which at full power and channel 12's transmit power limited. However, few devices have a method to enable a lower powered channel 12.

Channel 14 is valid only for DSSS and CCK modes (Clause 18 a.k.a. 802.11b) in Japan. OFDM (i.e. 802.11g) may not be used. (IEEE 802.11-2007 §19.4.2)

3.6 GHz (802.11y)

Except where noted, all information taken from Annex J of IEEE 802.11y-2008

This range is documented as only being allowed as a licensed band in the United States. Please see IEEE 802.11y for details.

Countries apply their own regulations to both the allowable channels, allowed users and maximum power levels within these frequency ranges. Consult your local authorities as these regulations may be out of date as they are subject to change at any time.

5 GHz (802.11a/h/j/n)

Except where noted, all information taken from Annex J of IEEE 802.11-2007 modified by amendments k, y and n.

Countries apply their own regulations to both the allowable channels, allowed users and maximum power levels within these frequency ranges. Consult your local authorities as these regulations may be out of date as they are subject to change at any time.

channel	frequency (MHz)	United States	Europe	Japan		Singapore	China	Israel	Korea	Turkey
		40/20 MHz[12]	40/20 MHz	40/20 MHz[13]	10 MHz	20 MHz	20 MHz	20 MHz[6]	20 MHz[14]	20 MHz
183	4915	No	No	No	Yes	No	No	No	No	No
184	4920	No	No	Yes	Yes	No	No	No	No	No
185	4925	No	No	No	Yes	No	No	No	No	No
187	4935	No	No	No	Yes	No	No	No	No	No
188	4940	No	No	Yes	Yes	No	No	No	No	No
189	4945	No	No	No	Yes	No	No	No	No	No
192	4960	No	No	Yes	No	No	No	No	No	No
196	4980	No	No	Yes	No	No	No	No	No	No
7	5035	No	No	No	Yes	No	No	No	No	No
8	5040	No	No	No	Yes	No	No	No	No	No
9	5045	No	No	No	Yes	No	No	No	No	No
11	5055	No	No	No	Yes	No	No	No	No	No
12	5060	No	No	No	No	No	No	No	No	No
16	5080	No	No	No	No	No	No	No	No	No
34	5170	No	No	No	No	No	No	Yes	Yes	Yes
36	5180	Yes	Yes	Yes	No	Yes	No	Yes	Yes	Yes
38	5190	No	No	No	No	No	No	Yes	Yes	Yes
40	5200	Yes	Yes	Yes	No	Yes	No	Yes	Yes	Yes
42	5210	No	No	No	No	No	No	Yes	Yes	Yes
44	5220	Yes	Yes	Yes	No	Yes	No	Yes	Yes	Yes
46	5230	No	No	No	No	No	No	Yes	Yes	Yes
48	5240	Yes	Yes	Yes	No	No	No	Yes	Yes	Yes
52	5260	Yes	Yes	Yes	No	No	No	Yes	Yes	Yes
56	5280	Yes	Yes	Yes	No	No	No	Yes	Yes	Yes
60	5300	Yes	Yes	Yes	No	No	No	Yes	Yes	Yes
64	5320	Yes	Yes	Yes	No	No	No	Yes	Yes	Yes
100	5500	Yes[15]	Yes	Yes	No	No	No	No	Yes	No
104	5520	Yes[15]	Yes	Yes	No	No	No	No	Yes	No
108	5540	Yes[15]	Yes	Yes	No	No	No	No	Yes	No
112	5560	Yes[15]	Yes	Yes	No	No	No	No	Yes	No
116	5580	Yes[15]	Yes	Yes	No	No	No	No	Yes	No
120	5600	No[15]	Yes	Yes	No	No	No	No	Yes	No
124	5620	No[15]	Yes	Yes	No	No	No	No	Yes	No
128	5640	No[15]	Yes	Yes	No	No	No	No	Yes	No
132	5660	No[15]	Yes	Yes	No	No	No	No	No	No
136	5680	Yes[15]	Yes	Yes	No	No	No	No	No	No
140	5700	Yes[15]	No	Yes	No	No	No	No	No	No
149	5745	Yes	No	返回 【上篇】POWERDESIGNER学习档案教程设计数据库的20条技巧 . 【下篇】基于Winsock API的VC网络编程实战 作者: militia 该日志由 militia 于11年前发表在综合分类下，最后更新于 2013年04月10日. 转载请注明: List of WLAN channels | 学步园 +复制链接 抱歉!评论已关闭. 书签 招生 白云飘飘网 青岛房产网 最新文章New 网站优化可以收获更好的收益 robots在网页开发中起到了一定的 SEO引擎优化可以更好的方便搜索 Dreamweaver教程很实用，值得学习 很多的photoshop教程值得学习，你 编程语言很重要，特别是对于计算 数据库非常常见，也非常实用！ H5指的是第5代html，不同于传统企 HTML是什么，该怎么制作？ 本站推荐 为什么PHP的吉祥物是一头大象 作业的提交和监控（二） 作业的提交和监控（一） Boost – Function 分析 奇技淫巧 – C/C++ 宏自身 模板的 SFINAE 原则 Octopress 和 Git 的结合 Electric-fence 介绍 web前端 数据库 编程语言 搜索技术 关于本站 返回首页 Copyright © 2013-2018 学步园  保留所有权利. 软文销售 QQ客服：2265327166 （其他合作也可洽谈） 必威体育 必威电竞