What are channel numbers for wider channels for 5GHz?
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.