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c rm. BT Wholesale Planned Engineering Works (PEW) 90 day overview – July to October 2011.

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  1. crm BT Wholesale Planned Engineering Works (PEW) 90 day overview – July to October 2011. The information contained in this presentation is confidential information as per your terms and conditions with BT. Please do not forward, republish or permit unauthorised access. The content is accurate at the time of writing and is subject to change. customerrelationship management

  2. BTW 2011 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. There is a current focus on efficient content delivery that will be offered through the Wholesale Content Connect product. • 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 04:00. 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. 20C Upgrades 20C BRAS code – This upgrade introduces revised code to improve the stability of the ESR BRAS 14 2 20C DSLAM – To manage additional capacity demands, new lines cards will be provisioned in existing DSLAM’s #

  4. 21C Upgrades 21C BRAS (Ericsson) Required to complete the capacity enhancement as a follow on from the code and card programme – 151 Core Migrations and 151 8G Throughput Upgrades 3 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 FER MCLAG & Virtual Switch – two separate upgrades that together improve capacity and resilience of WBMC shared 7 9 Access MCLAG – removes single point of failure between MSAN (mostly Fibre MSAN which could aggregate several Copper MSAN’s) and Metro Node to improve overall availability 11 MPLS Core Router Upgrades required as existing software is soon to become “End of Life”. Phase 1 commenced no customer impact. Phase 2 due to commence Dec 11.

  5. 21C Upgrades 7750 Minor code upgrade – Required to improve software stability – Starts 21/06/11 13 Copper MSAN Upgrade (2nd Vendor) – this is a code upgrade to enable TV Connect Services 15 The ADVA Chassis Code Upgrade is required to provide greater stability 16 Broadband Edge Aggregator Card Upgrade - this change provides a new port card to increase the current capacity capability 17 Broadband Edge Aggregator IOS Code Upgrade required as existing code is End of Life. 18 19 Copper MSAN Upgrade – this is a code upgrade to fix existing stability issues

  6. Completed 20C Upgrades 1

  7. Completed 21C Upgrades 3 5 8 10 12

  8. Broadband Services on 21CN 2 1 14 11 9 15 18 19 3 4 17 8 13 8 8 13 6 5 8 13 11 7

  9. Ethernet Service on 21CN 8 13 ADVA Chassis ADVA Chassis EEA/EES F 16 21CN Core EEA/EES 16 12 EFM 8 13 8 13 EEA/EES F ADVA Chassis 8 13 16 Key EEA/EES ADVA Chassis ETHC Ethernet Circuit ETHA Ethernet Access (Fibre/Copper) 7750 Edge Router EFM Router Customer / CP Site ADVA Chassis 16 16 EEA/EES EFM

  10. Descriptions • Colossus refers to BT's 20C UK core Internet backbone network mesh which runs on IP technology • DSLAM - A Digital Subscriber Line Access Multiplexer (DSLAM, often pronounced dee-slam) allows telephone lines to make faster connections to the Internet. It is a network device, located in the telephony exchanges of the service providers, that connects multiple customer Digital Subscriber Lines (DSLs) to a high-speed Internet backbone line using multiplexing techniques. • BRAS - A broadband remote access server (BRAS or BBRAS) routes traffic to and from the digital subscriber line access multiplexers (DSLAM) on an internet service provider's (ISP) network. The BRAS manages the logical path from the consumers modem through to the IP core network. • Fibre MSAN – Fibre MSAN provides both direct access for Fibre fed customer services and aggregation/resilience protection to the Network. MSAN is essential a next generation DSLAM. This is essentially the edge of 21C transmission backhaul. • Copper MSAN -Copper Multi Service Access Node equipment provides all Access for Copper/Metallic fed services, PSTN Voice DSL, Broadband, Slow Speed Ethernet and converts the end user service to IP. • EEA – Ethernet Edge Aggregator (a 7750) • EFM – Ethernet in the First Mile. Ethernet over copper access • IEA – Internet Edge Aggregator (a 7750) • EES – Ethernet Edge Switch (a 7750) • MSIL - Multi-service Interface Link is the Ethernet pipe connectivity between BT’s and CPs’ 21CN networks. MSIL provides for the needs of WBC, WBC (Converged) and NGN Call Conveyance. • BEA - Broadband Edge Aggregator. • FER – Front End Router • MSPE – Multi-service Provider Edge Takes 20C BRAS capability closer to the end user. Less latency. • MCLAG – Multi-chassis Link Aggregation Group – • NGA – Next generation architecture. Fibre based internet access such as FTTC/FTTP (Fibre to the cabinet/premises) • GEA – Generic Ethernet access, allows local loop equipment (e.g. Openreach) to be connected to fibre. • EU – End User. The consumer or business that uses the WBC connection • Access Node – A local exchange containing one or more MSANs • Metro Node – The backhaul network from the Access Nodes terminates on the metro nodes. • Core Node – One of 20 sites where WBC traffic is aggregated and handed over to CPs • LPA - Logical PoP Aggregator (a router that aggregates the traffic from BRASs at a 20C broadband point of presence) • MPLS Core- Multi-Protocol Label Switching Core network. A high speed IP network, where packets are given a predefined route and pass straight through, Unlike a normal IP network where each packet is inspected and routed by each node in the network. • AP - Aggregation Point. This is where multiple end users are aggregated into a single path for connection to the CP. Allow CPs access to broadband end users • EP - Extension Path. This is the connection from the AP at the WBC Interconnect Node to the CP. • Multiplexing – Many of these network elements perform the same functions of multiplexing many transmission pathways onto a single pathway, such that a point is reached where a single physical connection can route connections into an ISPs network. • Alcatel 7750 Infrastructure Ethernet Aggregation Switch (IP Multiplexor)

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