I'm not sure if I'm representative, but in my phone interviews, I was always asked: 
  
- Where do you want to be in 5 years? 10 years? (AKA - academia, job placement, etc.) 
- Tell me about x research experience from your CV (I got lots of questions about my undergrad thesis) 
- Do you have research experience with X or Y? 
- Are you open to researching (insert completely different topic than is listed on the POI's CV)? 
- Do you have any questions for me? 
  
I also asked all sorts of questions of the POI about the program, graduates, department, etc.  
  
You'll do fine!