Siemens is a global presence in the telecoms field and has many years of experience providing solutions to carriers worldwide. Here, two of Siemens’ most senior executives argue that whilst the 21st Century Network is an inevitable evolution, it will emerge at different rates at different locations according to differing commercial, financial and technological imperatives. Furthermore, the final success of the next generation network will be a function of compelling applications and services and not just the deployment of an all IP broadband infrastructure.