I have a friend that just had to do a lot of phone interviews. I found these tips online. A little late but in case you need to do another one. Good luck on getting the job
Managing the Telephone Interview
Try to reschedule surprise interviews. Say that you have a conflict and suggest a time you can call back. When you call back, be prepared for the call just as you would for a full-dress interview.
Have ready
* pen and paper, a calculator
* the job ad and the resume and cover letter which you sent in response to the ad.
* a list of your accomplishments which relate to the job you are discussing.
* research you have done on the company.
* a short list of questions about the job.
* your calendar.
The Techniques of a Pro
* Smile - it comes through in your voice.
* Speak directly into the phone.
* Don't smoke, chew gum, eat or drink anything. It all telegraphs to your listener.
* Stand up. Your voice sounds stronger.
* Avoid ah, er, hum. This habit is especially noticeable on the telephone. This takes practice. So practice.
For a winning performance
* Confirm the caller's name and company. Get the caller's telephone number.
* Be aware that the caller can't see you - can't see your hand gestures, can't see you taking notes.
* Pace the call. Let the caller do most of the talking, without interruptions.
* Do use the technique of repeating or re-phrasing questions. It tells the caller that you listened carefully, and gives you time to think about your answer.
* Avoid the simple yes or no; add selling points at every opportunity.
* If you need time to think, say so - as in radio, silence during a telephone conversation is dead air time.
* Compensation issues come at the end of the interviewing cycle, never at the telephone stage. You can truthfully say you don't know enough about the job to state a salary figure. And, of course, you would need a personal interview to really talk with the company.
Which is another way to go for the personal interview. Re-affirm your qualifications, express your interest in the job and the company. Say you would appreciate the opportunity to talk about the job further - in person.
taken from WorkTree.com.