This report examines where and why legacy services figure on the road map to a next-generation world, assessing the actions that network operators and service providers should take to ensure returns from legacy activity. The report looks at current practice and answers the following key questions:

- Should core legacy revenue be defended prior to migration or should its decline be managed?
- How long should legacy platforms - and therefore legacy services - remain in operation?
- What role will legacy services and legacy emulation services have in a carrier portfolio?
- How can the functionality of legacy connection-oriented services best be migrated onto next-generation platforms?
- How can operators best deal with the security concerns around NGNs?