Telephonic Question:

List a few of your main duties in a way that deviates from what you've already said on your CV. Position your answer to include what experience you have that makes you right for this position.
The purpose of many telephone interviews is to find out if candidates can really back up what they say on their CV, especially when put on the spot.
Make sure you have a copy of your CV to hand, and practice a concise explanation about each of the main duties completed during your most recent position. When this question comes up, simply expand upon each point confidently and, ideally, in a way which may relate to the role you're interviewing for.