Amongst my box of cables/cords,etc, I have a ?? that has a MODEM/DATA connector that looks like this on one end & on the other end it has a dual end with same & a usb so it can be plugged into a pc. What is this for? If a picture of it is needed,let me know,I'm curious. Edit, at the dual end, one of them is tagged PC/ETHERNET & the other one is labeled PC/USB.