It is actively used as a radio station, since all of the waves that come towards it get strengthened, denoised and thrown back torwards the direction they came from.
The solid substance the Radio Ring is made out of will energize any wave that hits it.
This ring is habitzed, although, the laws of the Radio Ring affect the minds of the inhabitants into being highly isolatory. Thus, any kind of society must be seperated into sub-sub-groups of tiny sizes, each vaguely connected.
Note: Do not attempt to fry the Radio Ring in a frying pan. Your elbows will turn into bulldozers.