A cable TV tech installed a splitter today on an internet only line, and added this component to one of its ports. It has no marks at all, is press-fitted, impossible to detach with pliers or unscrew, its housing rotates freely. It's threaded on an open end, but no cable jack or plug attachment possible, just empty hole inside till half-way in. Can anyone say what this component purpose may be, what telcos use it in ON, what make & model it is, who manufactures them, how I can find its specs? Is there any way to remove it at all? What are alternative models? Can it have a different purpose than it looks?