For this one you pay some company for this service so the easy way is to call them and ask your questions.
In another post I see what courses would be required to know all that is to be known about how things work.
Hello
i have land line phone from which i use internet
i don't understand does it work on AC or DC
Alternate current or direct current
i measure voltage it show dc 53V and ac

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic