What is SoX? Southern Crossroads (SoX) also known as Southern Light Rail (SLR) is a 501(c)3 organization that serves the Southeastern U.S. Research and Education community. SoX provides high-speed, global connectivity and other commodity services. SoX also serves as the Southeast connector to National Lambda Rail (NLR), Internet2 and other major U.S as well as … Continue reading About Us