Configuring Channels
On the home menu, tap Configuration > Wireless.
In the upper-right corner of the Wireless configuration page, tap Edit
.On the General tab, select Enabled.
On the Channels tab, select the channels in the drop-down lists according to the frequencies and bands.
Tap Select all to select all available channels for the band. Tap Clear all to clear all the selected channels.
On the top bar of the Wireless configuration page, tap Apply
.