I don’t see why people keep saying that phones ring when they don’t. And what’s this “hang up” business, anyway? Hang it up on what?
Early wall phones had hooks on the side on which to hang the receiver (the part you hold to your ear). The hook operated an internal switch (the hook switch) to disconnect everything so as not to deplete the batteries. So to end a call, you literally hung the receiver on the hook, hence the "hang up" term, which is still in use to this day.
On the bracket that the Handset rests the Ear Piece and makes the contacts that disconnects the Call. (Wall mount phones)
Or the Saddle of a Desktop Phone.
Those old Phones were tough too, You could hammer in a 16 Penny Nail with the Handset and it would still work.
Business phones, both digital and Voice Over Internet Protocol (VOIP), still have a cradle and ringers.
Outside of that, companies make retro versions of the old candlestick phones. Some are cellular and some work with Bluetooth technology.