The SFP-CA is an adapter that plugs into a PC via USB connection and provides an SFP port to program the MiTOP SFP sleeves.brbr The RAD SFP-CA is an optional adapter module for configuring the MiTOP SFP sleeves by connecting it to a PC via a USB port. The configuration adapter is used for the preliminary configuration such as assigning an IP address for initial use or specifying the mode of operation. It is also used to download software to the MiTOP units.brbr The SFP-CA adapter module has the following features: program MiTOP SFP Sleeves using a PC and USB port, connects to any PC USB Port, great for configuring the MiTOP sleeves, can be used to update the MiTOP unit software.