But, do we ever get what we pay for? lol.
In my case the 20mbp for the ups normally 20 and once it was 22 mbp. Either they're fiddling with the network on their backbone or it's on my end. As you can see I am getting more on my end for downloads that's due to the fact I've removed all the splitters they had in the box for CATV and Digital Phone. I've ditched that. Last time they were out here they ran new line to the box to the house.
Sometimes the closer the modem is to the box outside the better performance you would get.
Another thing is that if you call them up they can check your line for you, DSL they can tell you how good your signal is coming in. Where it needs to be fix on their end.
Cable Modem side the same, but once you go beyond 100mbps they seem to have issues on their end. I found Comcast CST just started had she found out why I could never get 105mbp. She put me on the right subnet ta-da problem solved. But it had taken over 20x CSR get them to get it right. Poor Customer Service Reps and poor Customer Service Tech on their end who don't have enough experiences.
My end we can have them replaced the Coax line for Cable Modem. Those are mostly RG59 you want RG6 Dual or Quad Coax. If you still have RG59 they need to come out and replace it their cost.
DSL their modem in the past were faulty, those have to be replaced. New drops to your NIB (network interface box) was most of the issues there. With DSL the tech would come out not the install tech you need Service level 3 or they call them Tier 3 tech would come out to trouble shoot your line at your end. Either the up the pole or underground lines and the DSL TBS terminal box station.
I use to work at SBC Yahoo DSL command office up in New England. Today that's AT&T now.
So if you have issues don't think it's just your home router think again. What's going inside the module box or your NIB. You should have a new Module Box and they should have go rid of the NIB rat nest box. Those are the old style boxes. If you live in Apartment building then there are more NIB in there.
Degrade in service means something is either not hooked up correctly or again bad connections, bad wiring an etc.
Check your bill see if you are paying line service calls or they call it home service. If you are best to take advantage of that service, and if you don't want it tell them and save some money per month or per year.