I currently manage a small network with about 15 users. Our internet service is 3M DSL which is 3M down and 384K up. Our email is hosted right now. I am planning an Exchange server in house. My question is would a dedicated T1 be better than our DSL service. I am trying to find out which one would be more reliable and would we see a difference in speed using the 1.544 Mbps T1? Any suggestions would be appreciated.