Abstract :
Before the final BISDN will be available to everybody, some decades will pass. It is therefore important that introduction strategies with a clear evolutionary path to the future are worked out. Two introduction strategies are described here, along with their early application. The first is mainly intended for business customers and offers in an initial phase ATM crossconnect functionality. The second is preferentially for residential users and offers initially POTS/NISDN and analog TV services. Both solutions can easily be upgraded step by step to a full ATM based BISDN
