What are channel numbers for wider channels for 5GHz?
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Hello.
I'm setting up some access points, and I'm wondering how channel numbers are assigned to wider channels.
I'm talking about 5GHz networks.
In the Omada control panel, in the radio's settings, I see a list of channels that is the same for all channel widths: 36, 40, 44, and 48.
I can select channel widths of 20, 40, or 80 MHz.
Looking at the table in Wikipedia, channel numbers for 40 MHz channel width are 38 or 46.
But I can't select those. I can only select 36, 40, 44, or 48.
QUESTIONS:
1. Are channel numbers in Omada not the center channel but the starting channel number?
2. If they are starting channel numbers, that means I can configure overlapping channels even though it looks like 5GHz channels are not overlapping?
Hi @Hooch
It was a typo. I updated it to 40MHZ now.
Omada AP works the same as the table below.
Here is another picture to explain this:
When select 20MHz, 4 channels available: 36, 40, 44, 48
When select 40MHz, 2 channels available: 38 and 42. But they are virtual. 38 combines 36 and 40; 42 combines 44+48. That is to say, when choose 40MHz, on the config interface, choose channel 36 is same as choosing 40; choosing 44 is same as 48.
When select 80 MHz, only one channel is available, we give it a virtual channel number 42. But it combines 36+40+44+48. When configuring, tt doesn't matter which channel you choose- you'll get the same result either way.
Hope it's clear.