OK Here's the deal. When you are housetraining and they are small it's important to take them outside every time they ring the bell. Once you are confident that they are on a decent schedule and are empty from just going outside, it's OK to tell them to go lay down and stop ringing the bell.
I know that sometimes my guys will run out first thing in the morning and pee, then want breakfast and then ring to go back out to poop after they eat. So I always let them out then even if they had just been out. But if we go on a walk and they pee 15 times and each poop on the walk, then obviously I know they can wait an hour before they need to go outside again. Loki has to go out more often than most dogs (at least once an hour if he's not sleeping) but he uses it to his advantage when my mom comes over and rings every 5 minutes. She feels bad for him and takes him out and gives him a treat, so he's not stupid - he keeps it up
My point is that it's annoying for a while but once they are a year old they are usually pretty solid and you should know their schedule enough to say "You don't need to go out right now" I know if mine really have to go because they will lay by the door or lay on the stairs and look out the window, rather than go back to napping or whatever they were doing.
It also helps to run them around and get them really tired so they nap rather than bug you to go outside to chase squirrels
(We don't have a fence, they go out on leashes, yet Sam still tries to chase squirrels!)