OMAP Wireless Connectivity WLAN channels

WLAN Channels

The List of WLAN channels is defined by IEEE 802.11. The 802.11 is practically divided to 2 frequency ranges, 2.4 GHz and 4.9/5.0 GHz bands. were each range is divided into multitude of channels. Countries apply their own regulations to support allowable channels and maximum power levels within these frequency ranges.

802.11 bg band frequencies

channel	frequency (MHz)	North America	Japan	Most of world
1	2412	yes	yes	yes
2	2417	yes	yes	yes
3	2422	yes	yes	yes
4	2427	yes	yes	yes
5	2432	yes	yes	yes
6	2437	yes	yes	yes
7	2442	yes	yes	yes
8	2447	yes	yes	yes
9	2452	yes	yes	yes
10	2457	yes	yes	yes
11	2462	yes	yes	yes
12	2467	no	yes	yes
13	2472	no	yes	yes
14	2484	no	yes-11b only	no

802.11 A band frequencies

channel	frequency (MHz)	United States	Europe	Japan		Singapore	China	Israel	Korea	Turkey	Australia	South Africa
		40/20 MHz	40/20 MHz	40/20 MHz	10 MHz	40/20 MHz	20 MHz	20 MHz	20 MHz	20 MHz	40/20 MHz	40/20 MHz
183	4915	no	no	no	yes	no	no	no	no	no	no	no
184	4920	no	no	yes	yes	no	no	no	no	no	no	no
185	4925	no	no	no	yes	no	no	no	no	no	no	no
187	4935	no	no	no	yes	no	no	no	no	no	no	no
188	4940	no	no	yes	yes	no	no	no	no	no	no	no
189	4945	no	no	no	yes	no	no	no	no	no	no	no
192	4960	no	no	yes	no	no	no	no	no	no	no	no
196	4980	no	no	yes	no	no	no	no	no	no	no	no
7	5035	no	no	no	yes	no	no	no	no	no	no	no
8	5040	no	no	no	yes	no	no	no	no	no	no	no
9	5045	no	no	no	yes	no	no	no	no	no	no	no
11	5055	no	no	no	yes	no	no	no	no	no	no	no
12	5060	no	no	no	no	no	no	no	no	no	no	no
16	5080	no	no	no	no	no	no	no	no	no	no	no
34	5170	no	no	yes-client only	no	yes	no	yes	yes	yes	no	yes-indoors
36	5180	yes	yes	yes	no	yes	no	yes	yes	yes	yes	yes-indoors
38	5190	no	no	yes-client only	no	yes	no	yes	yes	yes	no	yes-indoors
40	5200	yes	yes	yes	no	yes	no	yes	yes	yes	yes	yes-indoors
42	5210	no	no	yes-client only	no	yes	no	yes	yes	yes	no	yes-indoors
44	5220	yes	yes	yes	no	yes	no	yes	yes	yes	yes	yes-indoors
46	5230	no	no	yes-client only	no	yes	no	yes	yes	yes	no	yes-indoors
48	5240	yes	yes	yes	no	yes	no	yes	yes	yes	yes	yes-indoors
52	5260	yes-w/DFS	yes	yes-DFS/TPC	no	yes	no	yes	yes	yes	yes	yes-indoors
56	5280	yes-w/DFS	yes	yes-DFS/TPC	no	yes	no	yes	yes	yes	yes	yes-indoors
60	5300	yes-w/DFS	yes	yes-DFS/TPC	no	yes	no	yes	yes	yes	yes	yes-indoors
64	5320	yes-w/DFS	yes	yes-DFS/TPC	no	yes	no	yes	yes	yes	yes	yes-indoors
100	5500	yes-w/DFS	yes	yes-DFS/TPC	no	no	no	no	yes	no	yes	yes
104	5520	yes-w/DFS	yes	yes-DFS/TPC	no	no	no	no	yes	no	yes	yes
108	5540	yes-w/DFS	yes	yes-DFS/TPC	no	no	no	no	yes	no	yes	yes
112	5560	yes-w/DFS	yes	yes-DFS/TPC	no	no	no	no	yes	no	yes	yes
116	5580	yes-w/DFS	yes	yes-DFS/TPC	no	no	no	no	yes	no	yes	yes
120	5600	no	yes	yes-DFS/TPC	no	no	no	no	yes	no	no	yes
124	5620	no	yes	yes-DFS/TPC	no	no	no	no	yes	no	no	yes
128	5640	no	yes	yes-DFS/TPC	no	no	no	no	yes	no	no	yes
132	5660	no	yes	yes-DFS/TPC	no	no	no	no	no	no	yes	yes
136	5680	yes-w/DFS	yes	yes-DFS/TPC	no	no	no	no	no	no	yes	yes
140	5700	yes-w/DFS	yes	yes-DFS/TPC	no	no	no	no	no	no	yes	yes
149	5745	yes	no	no	no	yes	yes	no	yes	yes	yes	no
153	5765	yes	no	no	no	yes	yes	no	yes	yes	yes	no
157	5785	yes	no	no	no	yes	yes	no	yes	yes	yes	no
161	5805	yes	no	no	no	yes	yes	no	yes	yes	yes	no
165	5825	yes	no	no	no	yes	yes	no	yes	yes	yes	no

DFS - Dynamic frequency selection
TPC - Transmit power control

Channels in Sniffer

In the following example we see that all packets are on channel 3, which is frequency 2422Mhz



Channels is seen in each packet in the <Packet Info>-><channel> field