Hi, while taking a telephonic interview for any position/skill, the general questions to be asked are:
1. Current company
2. Current designation
3. What role he is playing in the company
4. CTC
5. ECTC
6. Notice period
7. Total experience and relevant experience
8. Reason for change
9. Check whether he has any gaps in education or experience - if yes, why?
10. If the position is for middle-level management, you can ask questions in their subject to know where he stands in his field/subject (for techies, for all skills sheet prepare basic questions, you can find them on Google)
11. Any prior interview taken in your company?
12. Does he know anyone in your company?
Also, remember to check whether the candidate is speaking confidently and genuinely.
Regards,
Swetha