I do understand that the router is in constant communication - flashing. On the Task Manager they show up as identifiable single, regular blips on the graph under networking.
What I am talking about are stretches of many minutes on end where there is obvious, lengthy downloading/uploading going on. On Task Manager this shows up as continuous jags on the graph. When this activity is not ongoing, then there are regular, single blips on the graph indicating the PC is checking for new mail or whatever - flashing.
My point is that when there is the lengthy activity I mentioned above, the modem is obviously busy doing something other than micro-second checks. In this state, my modem or if you wish, the Internet will not process any requests I make for it to do anything - it is very busy - not just microsecond flashing