First, I took an easy assessment test with questions like can you sit at a desk for a full shift taking calls. Then I took a long, like 45 min. to an hour, skills and math test. You had to answer mock calls and handle customer problems in a call-center environment. It was fairly easy, but you should be prepared to write information down on paper quickly before entering it into the computer. The math problems were sometimes complex - a lot of percentages and fractions, but manageable. Finally, you have to answer pages and pages of personality questions. You won't have to think, but you will have to continue to concentrate for a long time.
I just filled out a complex background history, it was comprehensive - you will need access to information (address, phone number, dates of employment, supervisor's name and title, ect...)
I just scheduled a phone interview - it will be next week.