Of all the interviews that we did only 4 got through, rest just faded.
As I observed, all the successful interviews had this two thing in common.
They were talking slowly and clearly. And they answered what was asked, nothing else.
For all the failed interviews, the people at the other end didn't realize that it was a telephonic interview and they just talked and talked without bothering if their message was going across.
While sitting at this end, the conversation felt as if the guy is having a conversation with himself.
Telephonic interviews are special and they should be treated that way. So If you are preparing for interviews, remember to browse google on how to do telephonic interviews.