NETGEAR DG824M manual Radio frequency channels used are listed in Table

Reference Manual for the Model DG824M Wireless ADSL Modem Gateway

The radio frequency channels used are listed in Table 7-2:

Table 7-2.	802.11 Radio Frequency Channels
Channel	Center Frequency	Frequency Spread
1	2412Mhz	2399.5Mhz - 2424.5Mhz
2	2417Mhz	2404.5Mhz - 2429.5Mhz
3	2422Mhz	2409.5Mhz - 2434.5Mhz
4	2427Mhz	2414.5Mhz - 2439.5Mhz
5	2432Mhz	2419.5Mhz - 2444.5Mhz
6	2437Mhz	2424.5Mhz - 2449.5Mhz
7	2442Mhz	2429.5Mhz - 2454.5Mhz
8	2447Mhz	2434.5Mhz - 2459.5Mhz
9	2452Mhz	2439.5Mhz - 2464.5Mhz
10	2457Mhz	2444.5Mhz - 2469.5Mhz
11	2462Mhz	2449.5Mhz - 2474.5Mhz
12	2467Mhz	2454.5Mhz - 2479.5Mhz
13	2472Mhz	2459.5Mhz - 2484.5Mhz

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

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.

B-16 Network and Routing Basics