Toner/probe question: Why does the tone stop at the patch panel and not continue to the switch?

I'm new to this and recently got a Fluke Intellitone Pro 200. I noticed if I tone from the wall jack to the IDF/MDF the tone stops at the patch panel. I'm wondering why it doesn't continue down the cable from the patch panel to the switch. Also if I connect a cable straight from the tone generator to the switch, I don't hear a tone on the cable. The switches are PoE. Just wondering how it all works.