[Frage] digital functions asterfritz

[vortex1]

asterisk runs in a fritzbox 7170 and i would like to edit the digital functions such call forward (all of them), call recognition, three way call
could someone tell me where is the file?

 

[vortex1]

Is there any update that i could get the feature codes file?

 

[rentier-s]

Do you think of this one?