http://blogs.technet.com/jroller/archive/2005/09/30/411812.aspxI just went to a truck stop and bought an antenna for my SMT 5600. It increases my reception from 1 to 5 bars!!! It works great. The antenna is about 4” long with an 8’ cord. Since they don’t sell one for the SMT 5600, I had to try all of them until oneen-USCommunityServer 2.1 SP1 (Build: 61025.2)