The interview process at Adtran took a considerable amount of time. I got 1 phone interview and 2 on-site interviews of greater than 3 hours each. Everyone was prepared for my interview which was a nice change. Once completed it took around 2 months to receive word on the status of the interview.
Interview questions [1]
Question 1
I did not expect to spend so much time speaking about my activities outside of the work place.