I have two black Box CSU/DSU MS using a crossover cable(pin 1,2 & 7,8\ncrossed to 7,8 & 1,2) connected back to back in my home networking\nLAB. The boxes are still booting up in an error mode. They are not\nconnected to the switch or router, just each other. The boxes are for\nDDS lines. Will they work back to back between two routers in a LAB\nsetting?