The problem is that the default of most of these units is set for non-North American phones so the ring sounds like it cuts off and is not sequential.
How To Fix the Issue
Click on "Regional" and make sure you are in Advanced mode.
Set the following options:
Ring Waveform: Sinusoid
Ring Frequency: 25
Also setting Ring Frequency to 90 seems fine
Now your phone will ring normally and properly.