Attributes for FRITZ!Box Call Monitor

Hi,
I’m using the integration AVM FRITZ!Box Call Monitor to show missed calls on HA dashboard. I took an example code to write a missed call to a helper entity:

state_attr("sensor.fritz_box_6591_cable_kdg_anrufmonitor_google_tb","from_name")

I would like to know, what other attributes are available for the fritzbox sensor. When I look at the sensors attributes I only can find options, duration, closed, prefixes, device class, friendly name but nothing like from or frome_name.

How can I find out which attributes are available for using with state_attr?

Thanks in advance for your help
Bernhard

I use a Text Helper and a automation

metadata: {}
data:
  value: >-
    {{ state_attr("sensor.fritz_box_7590_ui_anrufmonitor_telefonbuch",
    "from")}}  ({{
    state_attr("sensor.fritz_box_7590_ui_anrufmonitor_telefonbuch", "from_name")
    }})
target:
  entity_id: input_text.anrufliste
action: input_text.set_value

See:

Explanation in german: