See www.web.syr.edu
Please see that site for more info. For e,g., get an idea about the documents needed.
Based on the site above, I think the interview takes 2 to 3 months after your case has been transferred. But my lawyer does not know how long it would take. INS mentioned that because of the coming holidays, it will take longer than usual but she did not indicate anything specific at all.
Yes, when I called I was referred to the 800 number.
Just keep asking questions and stay prepared. This board is very helpful. It seems that Employment Based Interviewers don\'t usually deny the GCs. But now I am not giving you facts but what I heard from this board.
Good Luck