Fritzbox Binary Sensor - How?

Hi there,

as mentioned on the HomeAssistant Component-Catalog there is a Fritzbox Binary Sensor:

To get AVM fritzbox binary sensor follow the instructions for the [Fritzbox component]

But the component-page tells me:

The Fritzbox component for Home Assistant allows you to integrate the switch and climate devices.

Anyway, I did configure the component accordingly but I don’t know how to use the binary Sensor.
I was hoping to see wich devices on the network are “on/online” or “off/disconnected”.

I tried it by creating a binary sensor witch platform “fritzbox” but it didn’t work.

Does anyone know how to do it correctly or is it actually not possible?
As of today I’m using the “ping-component” to gain those informations.

Thanks a lot.