Wireless AP how to choose the right frequency band?

When multiple wireless APs are deployed, the frequency band is usually set. The main reason is that if two adjacent APs use the same frequency band, they may cause the same frequency interference or wireless signal conflict, causing instability in the WiFi network. So how do you choose the frequency band?

The 2.4G wireless AP and the 5.8G wireless AP have different frequencies and frequency bands.

The 2.4 GHz frequency does not refer to 2400 MHz but an interval between 2400 and 2500 MHz. This 100MHz frequency is further divided into 14 frequency bands, each of which is 20MHz wide. Obviously, 14 20MHz are much larger than 100MHz, so each 2.4GHz frequency band will overlap with at least 2 (usually 4) frequency bands.

However, there are only three available frequency bands that do not overlap with each other. They are Channel 1, Channel 6, and Channel 11. These frequency bands are separated enough to open without overlapping, and are generally recommended. But also consider other nearby networks or AP devices and make a choice.

5.8GHz has gradually become the mainstream, not only many wireless AP support 5.8G, many mobile phones or laptops also support 5.8G.

5.8GHz refers to the frequency range between 5180 and 5825MHz. There are many idle high frequency bands in this band, which can be divided into 23 non-overlapping 20MHz frequency bands. Therefore, 5.8G is not only more than the 2.4G available channels, but also has less interference itself, which is the preferred frequency for many high-density locations.

In fact, wireless APs basically do not need to set channels or frequency bands. They can automatically select the optimal frequency band, adjust output power, and reduce interference. If you can't adjust automatically, you need to set it as described above.

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