I've thought cat5(e) means always RJ45 lan cable. But my house has "cat5e 2-pair rj11 green (data) cables" from the living room to each room. My internet router is in my living room in the 1st floor (XFinity). What I want to do is to connect the Internet line from my router through the green cat5e rj11 cable to two upstairs rooms. My problem is how to connect from my router(RJ45) to the port RJ11 on the wall of living room and from the port RJ11 in the room to my other Internet devices (RJ45).
Is there any easy adaptor available?