What channels are utilized in a three- or four-channel deployment in DCS settings?

Zyxel_Judy

Path: Configure > Access points > Radio settings > DCS settings.

When configured for a three-channel deployment in the 2.4GHz band, the AP will utilize channels 1, 6, and 11.
For a four-channel deployment in the 2.4GHz band, the channels used depend on the country or region. Typically, the AP will use either channels 1, 4, 7, and 11 or channels 1, 5, 9, and 13.