SSH into CPE
open up the “/tmp/system.cfg” file
Find the “radio.1.chanbw=” line and change to the following
Note: it may say “radio.1.chanbw=0” that looks to be the default and works for 20mhz
exit file with
esc + :wq + Return or Enter
Save settings with
Change AP to 10Mhz and the CPE should reconnect.