The evolution of the market towards broadband and IP-based services is a major driving factor for network operators towards the integration of their so far separate data and telephony networks. This paper presents an approach to realize a mode of Global Service Control for telecommunication network operators that provides simplified automated management of services over a heterogeneous, multi-vendor network infrastructure. Combining existing management paradigms with new integration techniques, the Global Service Control approach makes it possible to manage carrier-class quality services over the global multi-service multi-media network.