One of the downsides to being a dominant provider of telecommunications around the world is that it also makes you the owner of legacy telecommunications hardware and networking equipment around the world. Even dominant global providers have to upgrade though. BT has begun a project dubbed 21CN (21st Century Network) estimated at $21 billion and projected to be completed in 2009. The focus of the rollout is to upgrade customers from legacy telecommunications networks to a new, all-IP communications network. Alcatel-Lucent is a key supplier, as is Cisco, Fujitsu, and Huawei Technologies. You can learn more in this article from Computerworld.com.