AHA - AVM Home Automation HTTP Interface for ESP8288
Thanks to Sven,
Part of this code is form https://www.open4me.de [1]
Thanks to Sven and his Block "Svens Gedankensplitter"
The post: "Fritzbox: ESP8266 lässt Telefon klingeln" shows how to can let ring your Phone by
using an ESP8266 and a "Fritzbox" Router.
[1] https://www.open4me.de/index.php/2016/10/fritzbox-esp8266-laesst-telefon-klingeln/