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The information contained in this Presentation is confidential information as per your terms and conditions with British

BTW Planned Engineering Works 90 day overview January 2014 to March 2014 These dates are indicative dates only and not to be used for any forecasting purposes as they are all subject to change. Please ensure that you wait for formal notifications from IRAMS. .

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The information contained in this Presentation is confidential information as per your terms and conditions with British

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  1. BTW Planned Engineering Works 90 day overviewJanuary 2014 to March 2014These dates are indicative dates only and not to be used for any forecasting purposes as they are all subject to change. Please ensure that you wait for formal notifications from IRAMS. The information contained in this Presentation is confidential information as per your terms and conditions with British Telecommunications plc (BT). Please treat it accordingly and do not forward, republish or permit unauthorized access. BT reserves the right to make changes to the information in this Presentation at any time without further notice.

  2. BTW 2012 Network Changes – 3 month rolling plan • Whilst BTW has continually worked to enhance its network, we are currently undergoing an exceptional level of change driven by four main drivers:- • Stability – to improve the reliability of the network, BTW is targeting certain network elements with hardware and software improvements. • Capacity – the need for additional capacity is driven by an increase in the number of broadband users on the 21C network (through migration from 20C and growth) and also by the ever-increasing bandwidth demands of those users. • Resilience –to improve the resilience of the network , BTW is actively removing single points of failure from the network • New Functionality – to meet the needs of the market BTW needs to enhance its network to deliver the services its customers require. • This presentation outlines the key upgrade programmes, their drivers, customer impact and the number of upgrades per programme per week. • BTW is keen to deliver all the required improvements as quickly as possible whilst actively managing the risk to customers. For this reason a range of run-rates against each programme has been outlined. The actual run-rates achieved will be determined by this ongoing live analysis of risk. • Customer outage times for the PEWs start between 00:01 and 02:00 with the aim of completing customer impacting work by 06:00. This allows 2 hours for roll-back should the PEW be unsuccessful. • Business as usual capacity upgrades and upgrades to resilient structures have not been listed here.

  3. 21C Upgrades SVLAN moves - these moves offload SVLAN’s (bundles of Broadband traffic) from one BRAS to another. This is carried out to alleviate capacity issues mplet 6 Required to support IPv6 and due to current software going end of support 45 Broadband capacity requirement 22 50 Resolves software defect.

  4. Ongoing 20C Upgrades Cont’d 44 46

  5. Completed 20C Upgrades 1 14 2 36

  6. Completed 21C Upgrades 26 27 30 23 38

  7. Broadband Services on 21CN 46 49 2 14 46 29 1 36 44 11 40 35 22 4 20 34 32 39 45 9 27 37 39 6 50 48 45 28 26 47 45 45 23 38 39 31 34 11 51

  8. Ethernet Service on 21CN

  9. Descriptions

  10. Management of risk

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