Yes, when I say re-plug the cable, I mean the cable into the modem. Power off the modem doesn't help at all. I don't need to power off, just take off the cable and put back. Sometimes, just screw it looser or tighter then the signal is back. Since both the new modem and old modem behave same, I don't think it is the modem issue. And I have changed to new cable with new split and it is still same. I doubt it is the cable itself. At night, it can stay till 3-4 hours (9pm - 12pm) and then drops at the midnight. Rogers told me the whole street is fine. Then it must be my house. I didn't change any configuration for a long time. Can't be my settings' problem.Having a slow constant DSL internet is better than on/off all day long.
I didn't try to swape the cable from the modem to the PC. Can I plug the cable right into the laptop or PC? I didn't know that.
Another technician will come over tomorrow and I will have him sit till my internet goes down.