METHOD OF AND APPARATUS FOR GETTING ACCESS TO A TELECOMMUNICATION NETWORK AS WELL AS FOR BILLING TELECOMMUNICATION SERVICES RENDERED BY THAT NETWORK

The invention relates to a method and a device for accessing a telecommunication network and for billing telecommunication services, whereby there are presented new processes, as compared to those of classical mechanisms of network providers, services are offered to their customers and fees are charged for providing the same. In this context the invention primarily concerns novel access mechanisms and access media to a telecommunications network, modified security mechanisms as well as innovative counting methods. The invention is characterized in that authentication methods are used in the telecommunication network, which permit a subscriber to certify at any one freely choosable point in time that a payment for a service which has been solicited or which is to be solicited, is provided or has already been provided.