I had DSL with a router and modem. I never had problems with it, never required reset etc. Over the years somehow I forgot and thought it was a combo router and modem.
Then when I finally had a problem, I insisted to customer support I had done many power cycles already. They scheduled a tech to come out, but I realized my mistake before it went that far at least.
I went as far as going out to one of the local metro offices for my ISP in the city, to demonstrate some bizarre problem that I was experiencing with my combo router / modem.
I was actually able to demonstrate the issue in person, and everyone was scratching their heads trying to figure out what was going on.
I decided to try factory resetting it as a hail mary... and instantaneously I got a perfectly functioning ADSL connection.
It would have been far less embarrassing for me to have thought to try that and make the effort at home. lol
I had DSL with a router and modem. I never had problems with it, never required reset etc. Over the years somehow I forgot and thought it was a combo router and modem.
Then when I finally had a problem, I insisted to customer support I had done many power cycles already. They scheduled a tech to come out, but I realized my mistake before it went that far at least.
A power cycle fixed the modem, of course.