Using a Fritz!Box entails the combination of different telecommunication services and variants of data transmission. A Fritz!Box includes an adapter for WLAN and phone and enables you to use VoIP services. You can set up a Fritz!Box so that you can be connected via VoIP, which is a service also offered by DCalling. For DCalling customers, in case you have a Fritz!Box or a similar device, we recommend to set up your Fritz!Box for all international calls and/or calls to mobile networks to be connected via DCalling. This way, there is no need to use dial-in-numbers anymore then.