I will reply this weekend. Thanks for uour quickly and kindly reply.

@TP-Link Your suggestion was the first usage I did. Then it failed. As the subject described here, hangs up once a child note added.

@TP-Link Thank for your quickly reply. I cannot move main deco between 1st switch and the modem as they are located on different floor. And the modem I had which has the feature of wifi router. My...

Hi, The diagram below is the distribution of my home network. Red line means the connection is using cable (RJ45). Brown lin means if any one of these connections is setup, the modem and all decos...