wireless frequencies

Hello

I would like to know how to set up wireless spectrum during the deployment of more of an access point.

Suppose I have two access points with the same exact wifi security settings and SSID, intended to "fast roaming. How often should have two devices? Specifically, their frequencies (GHz) are different, or should they be the same?

Now let's suppose I have an access point and a Repeater/Extender/rangebooster. The Repeater have the same frequency as the access point, or should it be different?

I ask this because the web search gave me all types of responses. Some say that I have to use the same frequency and others say they have to be different, to avoid interference.

I guess in the case of a Repeater "it makes sense" that the frequency must be exactly the same. However, in the case of access points 2, they may work better if the frequencies do not match.

Any comments?

Thank you

Vieri,

The questions you have may have a wide range of answers depending on whom you ask most likely. I won't say all the answers are correct, but most have some merit to them. Keeping in mind here are my answers to your questions.

First, the question is not only about the frequency, but also channel in this frequency. Depending on what country your depends on the actual routes available, but my answer is still applicable.  Usually I try to move customers to the frequency of 5 GHz (802 11A) because there are devices less in this spectrum, less noise and more channels (36, 40, 44, 48, 52, 56, 60, 64, 149, 153, 157, 161 in the United States). The advantage of this is that it allows multiple access points in an area without creating interference co-channel, the downside is that not all client devices support 5 Ghz (802. 11 (a), so in this case, you will have to opt for the 2, 4 Ghz Band (802.111 b / g) which has only 3 channels overlapping (1,6, & 11 in the United States). On the side of 2. 4 Ghz, it is strongly recommended to use only these three channels; so it's limit when you need 4 access points in a small area where each access point can hear other really good; This is where the design, planning and the planning chain come into play. The last review here is the overall coverage area, 2.4 Ghz has a cell of greater coverage for 2 reasons: 1) a 2.4 Ghz radio wave moves farther and penetrate obstructions better than higher frequencies, 2) 2.4 Ghz is likely to have a greater transmitting power - 802. 11 b is capable of a max transmit power of 100MW of AP for a total of 30 dB max EIRP or 1 Watt.

So with that of the road if you have two AP configured in the same way you should have on the same band 802. 11A or 802. 11 b / g to allow the more smooth wandering, since many customers of devices do not always change smoothly from the bands; but in doing so the s AP must be on different channels.

If you are setting up an access point and a Repeater then the must be on the same band and channel as the other access point is unable to repeat the signal since it will not hear it.

I hope this helps, if it feels free to write it down.

Thank you

Kayle

Tags: Cisco Wireless

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