Twinkle: Mark window as "demands attention" or show a text notification on incoming call

Mark window as "demands attention"

Install wmctrl through your package manager, i.e.

sudo apt-get install wmctrl

Download the attached script and mark it as executable.

Then go to Edit -> User Profile -> Scripts and add the script for "call incoming".

Text notification

You can additionally get a notification bubble in your window manager, by adding

notify-send "Eingehender Anruf..."

to the script.