Phone interview is a basic 30min conversation. If the VP hears some buzz words you mention throughout the interview, he will then, fly you in for a all day interview. You will talk to two or three executives and then with the CEO. At the end, you will meet with the VP of Sales. Beware, he is very charming, and he will sugar coat marketing activities as they are so so so busy, it would keep you away from prospecting. Not true and his charm will eventually fade away. Ask questions and more questions.