Read the forum guidelines
The Voice Tools Cheatsheet shows Spontaneous Ring as available from the Voice Tools page. But going to Voice Tools >Settings does not show this feature. How do you set up or change the Spontaneous Ring option? (and also, it's another example of the poor design of Cox Web Pages.)
I just confirmed your navigation. It's Voice Tools > Settings > Settings (again). Mine had Call Waiting enabled. I wonder how long this has been on without my approval? Is there a cost for Call Waiting?