This RJ45 adapter set is used to convert the DB25 connection for the ANDI communication channels (1- 2- 3- 4- 9- 10- 11 or 12) and the connection on the POS w/D9 to an RJ45 connection. All of the special pin configurations will be inside of the adapters. The customer must provide the CAT 5 cable (straight through pin configuration) that will be installed in between these adapters.