Hello,
I have two models CF-E110NV2 ... and I made a firmware downgrade on one of them from the official website (the original was 2.3.1.6 and now 2.3.1.2).
Link: http://en.comfast.com.cn/download/FirmwareUpgrade/item-315.html
Unfortunately, the CPE does not work as it was ... I can connect to...