My router has 4 ports and I need to connect 5 things.  I got this to do that.

I plugged in the power supply, connected it to the TP.  Unplugged one thing from the router, connected the router to the TP and plugged 2 things into the TP.  The lights I would expect are on, but the two thing plugged into the TP have no internet connection.

Am I wrong about what this is supposed to do?

Am I connecting it wrong?

Any help would be appreciated.