1. Going faster and staying in control - Building the world’s biggest NGN Tim Hubbard Head of Technology Futures

2. Why did BT begin 21CN An introduction to 21CN: the technology, architecture and delivery programme The potential opportunities enabled by 21CN During the next 60 minutes I propose to discuss:-

3. 21CN Setting some context

4. BT’s network architecture today Today IP ATM PSTN DPCN PDH SDH-mesh SDH-MSH IP ATM PSTN DPCN PDH SDH-mesh SDH-MSH DSL KiloStream PSTN Fibre Copper DWSS Conc DLE DSC MSC Conc DLE DSC MSC Signalling and Speech traffic PSTN Call control

5. 21CN it’s big and bold Not simply network transformation…a radical overhaul of BT’s business and systems Supporting a fundamental shift in customers’ new requirements and expectations Core network convergence Remake the Portfolio 21C Customer Experience Web21C

6. 21CN evolution Massive network simplification 21CN IP/MPLS Fibre & Copper MSAN Call Control Content WWW ISP Multi-service accessConverged core Current thinking. No implementation assurances Wireless Ethernet Backhaul Other CPs I/connects

7. 21CN network architecture IP/MPLS Fibre & Copper Copper MSAN Call Control Content WWW ISP Multi-service accessConverged core Wireless Ethernet Backhaul Call Server: Carries out “call control” by setting up and tearing down multi media communications sessions, etc Directory: Holds all numbers, whether they are on 21CN, legacy PSTN, other CP network, etc BRAS: Broadband service delivery point (mainly UK) Session Border Controllers: Gateway for customer traffic between 21CN and legacy PSTN/other CP networks Signalling Firewalls: Gateway for signalling traffic to/from 21CN and legacy PSTN and other CP networks Other CPs MSAN: Converts analogue PSTN speech into VoIP MSAN: delivers either copper based, fibre based or wireless based services to end customers MSAN: Copper version has “combi card” functioning as DSLAM for broadband and concentrator for PSTN MSAN: Country specific

8. 21CN Separating speech and control Metro/Core MSAN 21CN PSTN OCP MSAN

9. 21CN Resilience De-couple each “layer” Network Service MSAN MetroCore UK government approved principles applied to 21CN globally Physical and logical resilience Services “homed” to two discrete source points Service and network availability and quality at least equal to traditional services

10. 21CN Equivalence of Input Comms Providers Point of Interconnect IP/MPLS Core Metro/Core POP End Users MSAN POP Last mile access End customer service (any CP) MSAN Perceived areas of bottleneck by regulator Openreach Network Backhaul Services portfolio Infrastructure (BTD/BTO) BT Services

11. 21CN progress Service led Broadband migration in the UK started (Oct 07) Customer led Wholesale Ethernet service delivery in the UK (Jan 08) 35% of UK national infrastructure operational Develop and test brand new product portfolio Delivered to 164 countries globally Shift to customer led migrations PSTN Pathfinder progressing in South Wales

12. 21CN migration process 21CN MSAN Deployment of BTs NGN 20CN DSLAM PSTN switch Main frame BT serving exchange building Disconnect copper pairs from 20CN and re-connect onto 21CN No change to home or office wiring End customer site No need for end customer site visit No change to copper access network Access network copper pairs ISDN No change to CPE

13. 21CN architecture blueprint Configuration of products & services Assembly of services & processes Global platforms Management & IT Capabilities SDK (BT & 3rd party applications) 21CN global network platform Customers Software Development Platform Service Creation Engine

14. Enabling new levels of competition MSAN Metro Node To other CPs 21CN Backhaul Network To other CPs PSTN Gateways (B/Band) BGWs Call Server Gateways Control (PSTN) Non BT PSTN (CP control) Non BT PSTN and Broadband Non BT Broadband CMSAN

15. Personalised infotainment and product bundling to customers Service delivery from a “single point” Discrete personalised advertising Third party service “mash in” and “plug in” through open APIs and SDKs Going forward with 21CN?? - potential services Global, virtual supply chains

16. OSS convergence Implications of UK NGA consultation Current challenges being addressed

17. In conclusion 21CN is carrier grade, secure and industrialised Customer experience on 21CN is paramount 21CN moves BT from service specific platforms to multi service platform, delivering massive simplification 21CN is enabling new service delivery over a global, real time, open platform

18.  Answers Questions