What do you mean RJ45 adapters? It should be a network cable with no crossovers just straight thru connections. I hope it is that way because I am about to be running the C35/5056D combo but then again I make my own network cables so I can make what ever is required but I will need to verify it. In fact it is an RS232 interface I think. Tech Info - RS232 Cables and Wiring
Look at the bottom of the page for the correct pinout of the RJ45 connector.