If it doesn’t what does it do?
I mean I aggree with this, nontheless my first comment (just wanted to nitpick and engage some convo with it):
IMHO the definition should be updated to include any sound that alerts of an incoming call.
Though, in my native language ‘ringing’ is kinda analogue to ‘vibrating’ and as for ‘ringing’ like the noise, we use a different word.