21CN is BT's next generation network - an advanced communications network for the future.

BT's 21CN vision is radical and groundbreaking. It is designed to empower the end-user with control, choice and flexibility like never before - offering communications from anywhere to any device. This ambitious and exciting program will enable a new generation of rich personal services, transforming people's personal and business lives.

An end-to-end IP(Internet Protocol)-based network, 21CN will consolidate BT's complex network and systems infrastructure to ensure that the delivery of the next generation of converged services is faster, more efficient and more cost-effective than ever before. But 21CN is not simply a network transformation; rather it's a radical overhaul of products, systems, process and a fundamental remaking of our business.

C21 in a netshell                                 How does this affect standard alarm monitoring?