In the sub-item of the “Contact database” under “Internet databases” -> TVG The phone book can be carried out a reverse search directly on the Internet. To do this, you have to register with TVG Verlag. There is a 45-day free trial.
To activate the trial version you have to register as follows.
Perform TVG-Verlag registration
after registering with TVG-Verlag you will receive an email with a PIN.
Enter this PIN in “Registration”.
In the info bar you can see how long the registration is valid.
In the user profile, you still have to give the user permission to use it.