FritzBox call an internal phone

Hello everyone! I was playing around with Node-RED the last few hours and asked myself: Is it possible to call a phone connected to my fritzbox? For example use the TR-064 protocol or some other way.... But I wasn't able to find a flow for that. I was looking at the node-red-contrib-fritzapi, but I was not able to do calls. It would not need to talk (so no TTS), it is just supposed to let the phone ring, nothing else. Can someone please help me with this?

Have a look at node-red-contrib-fritz , it has some more possibilities thne the one you are using now.
One of the options is fritzbox-phonebook, maybe you can dial a number easy with this.
Internal numbers you can find here