Portfolio

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Forward looking statements Caution advised

• Certain statements in this presentation are
  forward-looking and are made in reliance on the
  safe harbour provisions of the US Private
  Securities Litigation Reform Act of 1995. These
  statements include, without limitation, those
  concerning BT's plans for transformation of its
  networks benefits to customers of the 21CN
  programme key milestones and expected timetable
  for delivery of 21CN and the benefits in
  relation to, for example interconnect,
  convergence and broadband.
• Although BT believes that the expectations
  reflected in these forward-looking statements are
  reasonable, it can give no assurance that these
  expectations will prove to have been correct.
  Because these statements involve risks and
  uncertainties, actual outcomes may differ
  materially from those expressed or implied by
  these forward-looking statements.
• Factors that could cause differences between
  actual outcomes and those implied by the
  forward-looking statements include, but are not
  limited to material adverse changes in economic
  and financial markets conditions in the markets
  served by BT supplier arrangements future
  regulatory actions and conditions in BTs
  operating areas technological innovations
  developments in the convergence of technologies
  and the anticipated benefits and advantages of
  new technologies, products and services,
  including broadband, not being realised.

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Agenda

• Datastream Product Developments 2005/06
• High Level Product Description for Flexible
  Access Services (FAS)
• Consultation Proposal for Datastream Withdrawal
  Migration to 21CN FAS
• Project Timescales

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Agenda

• Datastream Product Developments 2005/06
• High Level Product Description for Flexible
  Access Services (FAS)
• Consultation Proposal for Datastream Withdrawal
  Migration to 21CN FAS
• Project Timescales

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Datastream Product Developments 2005/06

• Removal of Datastream Port Reservation scheme
  June 2005
• Launch of VP Aggregation Stat Gain Credit
  schemes June 2005
• Larger Virtual Paths launch expected Q4
  2005/06 (subject to notification)
• Datastream Max (high speed end user product)
  Beta Trial expected Q3 2005/06 (subject to
  notification)
• Virtual Path Automation
• Phase 1 New Orders delivered December 2004
• Phase 2 Cancellations new order enhancements
  launch expected Q4 05/06
• Phase 3 VP re-grades re-arranges launch
  expected Q1 06/07

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Agenda

• Datastream Product Developments 2005/06
• High Level Product Description for Flexible
  Access Services (FAS)
• Consultation Proposal for Datastream Withdrawal
  Migration to 21CN FAS
• Project Timescales

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Flexible Access Services (FAS)
Exchange building
CMSANs
Egress Ethernet Switch (serves SP)
Dedicated BW to single CMSANs
FMSAN
CMSAN Groups (max 20k users per group)
SP
Metro network
Aggregate Access (AA)
Dedicated BW to CMSAN groups
Ingress Ethernet switch
Note Figure shows bandwidth (BW) delivery to
single AA. Can deliver to any AA on any Metro.
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What is FAS?

• Flexible Access Services (FAS) allow
  Communication Providers (CP) to access DSL end
  users via an Ethernet based transport PPPoA and
  PPPoEoA.
• FAS comprises three basic components
• Aggregate Access (AA)
• SVLANS from point of handover to CMSANs or CMSAN
  Groups
• End User Access (EUA)
• It is a partially managed service, aimed at
  Communication Providers who want to provide their
  own broadband networks either to other Service
  Providers or directly to end users. FAS allows
  Communication Providers to develop and
  differentiate their own end user services.

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Aggregate Access

• Aggregate Access at any Metro node. Potential
  options are
• Customer-sited Handover
• In-span Handover
• In-building Handover
• Bandwidth
• 1 Gig Ethernet
• Demand for other sizes?
• Allow overbooking (likely to be possible at CP
  risk)
• Metro node list circulated to industry on 26th
  September 2005.

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SVLAN

• Dedicated to a CP
• Connect from any Aggregate Access in any Metro
  node.
• Connect to single CMSAN or a CMSAN Group
• CMSAN group will be limited to a max of 20k End
  Users (EUs) i.e. not
  the whole of a large exchange (top 300 exchanges
  have more than 20k end users)
• Shared SVLAN (under review)
• Small increments (0.5Mb) (increments and max size
  to be determined)
• Resilience anticipated to be same as on current
  Datastream product
• SDSL ADSL EUAs on the same SVLAN (day 2)

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End User Access (EU)

• ADSL
• Rate adaptive upstream and downstream (upstream
  limit of 832kbps or possibly 432kbps -views?)
• No fixed rate option (allows CP to control bit
  rate)
• SDSL (day 2)
• AAL5 encapsulation only
• Protocols
• PPPoA and PPPoEoA (auto-sensed)
• Ethernet bridging (under review)
• All modifications intended to be supported
  (FAS/IPS/DS, regrades, SP migrations, change
  SVLAN)
• StandardCare / EnhancedCare
• Multiple VCs per SDSL EUA (need further
  discussion to determine characteristics)
• Mapping VCs to separate SVLANs (day 2)
• Multiple VCs on ADSL EUA (under review)
• Mapping VCs to separate SVLANs

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Agenda

• Datastream developments for 2005/06
• High level product description for Flexible
  Access Services (FAS)
• Consultation Proposal for Datastream withdrawal
  migration to 21CN FAS
• Project Timescales

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For consultation - Datastream Withdrawal

• Options for stopping New Supply
• Provide 12 months notice for the withdrawal of
  new supply on an exchange by exchange basis as
  FAS becomes available
• Proposal to stop New Supply either
• 12 months after FAS is available at the exchange
  or,
• when an agreed percentage of the UK population is
  covered by FAS
• Proposal for Withdrawal of Datastream
• 12 month notification for the withdrawal of
  Datastream
• Product withdrawal, 3 months after FAS has been
  rolled out to all current Datastream exchanges
• Options for contracting with New Communication
  Providers
• No new Communication Providers on Datastream
  from
• launch of Flexible Access Services (FAS) or,
• when an agreed percentage of the UK population is
  covered by FAS
• This would apply to all exchange areas where FAS
  is available.

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For consultation - 21CN Migration from Datastream
to FAS

• Not a forced migration - option for CPs to stay
  on Datastream, until Datastream is withdrawn
• Planning for FAS to Datastream migrations
• Planning for End User Access migrations FAS to
  IPstream
• Further work
• Definition of 21CN migration process for
  Datastream to FAS customers
• Product Commercials

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For consultation - 21CN Migration from Datastream
to FAS

• General
• FAS config. details provided to the CP at least
  2 days before migration
• Migration will require jumpering, with EU outage
  
• Bulk as part of DSLAM offload
• Most efficient least End User impacting (may
  give shorter EUA outage times)
• Changeover date should be given (may not be
  guaranteed)
• All of the CPs EUAs within an exchange
• Bulk separate from DSLAM offload
• Planned as now - completed on a negotiated date
• CP-selected set of EUAs
• Singleton any time
• Aim to complete on Customer agreed date

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Agenda

• Datastream developments for 2005/06
• High level product description for Flexible
  Access Services (FAS)
• Consultation Proposal for Datastream Withdrawal
  Migration to 21CN FAS
• Project Timescales

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Datastream Withdrawal
G
G
G
G
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FAS Product - Launch Plan
G
G
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Abbreviations used
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