update 2... the technician came to my home this morning, he helped to check the signal from the incoming cable & the one from incoming cable to modem. sadly, he found no problem at all, I was told the signals are very good & nothing he can do... am ...
update… contacted Rogers’ tech support today, the tech guy helped me to check the signal on the modem, and he said the result looked okay, but saw some disconnections on the modem during the test. after that, he helped me to arrange a field tech guy ...
I have no other Rogers' services, except Internet (for now) I went to basemant & check the cable / comnnector just now. I found out that I have installed a y-splitter, I almost forgot about it. incoming data cable ---> cable > modem ---> termination ...