Possibility to kill a call? Maybe fritzbox-binding?

i use the Fritzbox-Binding on my OH2. The fritzbox-binding, not the tr-064. I have a fritzbox 7490.

When someone rings the door, my ip-doorphone makes an ip-call to the fritzbox and i can answer with my house phone. If nobody is at home, the built-in call answering machine (Anrufbeantworter) of the fritzbox answers the call and you can speak to it.

If i don´t answer the call with the phone and directly open the door, the answering machine answers the call. This behavior is not what i want. Can i use the door contact inside a rule to kill the call, when i open the door?

Any suggestions?