21CN Mass Migration Methodology: queries to: [e-mail]

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21CN Mass Migration Methodologyqueries to
tom.saville_at_bt.com
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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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• This presentation should be viewed in
  conjunction with the PSTNMass Migration
  Methodology Presentation presented at the IMWG on
  15/11/05 by Alan Cameron (ref SLOT 6 slides16
  23)
• This presentation is designed to inform
  Communication Providers of
• the migration activities which will be undertaken
  by BT including
• Pre-Transfer activities (identified as Configure
  Verify phase)
• On the night Transfer activities
• Post Transfer activities (identified as Monitor
  phase)
• the impacts on End Customers of mass migration
  for PSTN VOICE SERVICES

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E-side MDF Pre-Transfer
Pre-Transfer Activities Install, configure, cable
commission MSAN, 21CN Test Access Matrix (TAM),
Test Heads Comms Cable 21CN TAM to MDF fit
Transfer Connectivity Point (TCP) modules on
E-side blocks TCP module installation
checks 21CN Call Server MSAN data build PSTN
pre-transfer checks
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Pre-Transfer Activities - Detail

• TCP installation
• Install Commission phase incorporates a 100
  end to end test of all 21CN equipment.
• Pre Post TCP installation checks ( BAU /
  Non-intrusive)
• 5 pair module Target 30 seconds customer outage
• 5 pair module includes Over Voltage Protection
• Trials 100 pair block 15 - 20 minute TCP
  installation
• PSTN Pre-Transfer Tests
• Check connection from 21CN TAM to TCP (Existing
  line)
• Business as Usual test / Non-intrusive
• Check Pre-build MSAN services
• Non-intrusive test
• Activity Freeze before Transfer
• Aiming for maximum 12 hours

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E-side MDF Transfer in progress
Transfer Activities Command Control confirm
transfer Go/No Go Disconnect PSTN concentrator
Switch 21CN TAM Sync with changeover from DLE
to Call Server
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Transfer Activities detail

• Transfers will happen overnight in periods of low
  network activity but may be scheduled for any
  night of the week
• Transfer Go / No Go Decision
• Various defined decision points along Transfer
  timeline
• Final decision approximately 10pm
• Calls in Progress
• Calls in progress will be lost, however, special
  measures to prevent disruption of 999 calls will
  be implemented
• PSTN Disconnection
• Number of options under consideration
• Testing to determine most suitable to minimise
  service outages
• 21CN TAM Switching
• 21CN TAM suite (Max. 14400 lines) lt10 seconds
  (Outgoing calls)
• PSTN to 21CN re-routing minutes (Incoming
  calls)
• Alignment of both to minimise total service outage

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Transfer Activities - End User Experience

• Outgoing calls
• Short break in dial tone during 21CN TAM switch
• No service interruption announcement during
  switch
• Incoming Calls
• Precise detail of service capability will become
  known upon completion of transfer engineering end
  to end trials phase.
• Incoming call capability will be dependant upon
  size of number range and customer position within
  it.
• For those at the front of the number range
  restoration of service capability will be
  instant, for those further along the range, the
  duration will be longer.
• A range of options are being considered as part
  of the transfer engineering solution to improve
  these timings.
• Principle is to achieve the shortest service
  capability interruption possible
• Dial Tone
• There will be no perceptible change in the dial
  tone heard by the end user once transfer has been
  completed.

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E-side MDF Post Transfer
MDF
Test Head
D
E
POTS
PSTN DLE
PSTN CONC
OVP
Customer lines
OVP
OVP
21CN TAM
MSAN
21CN Voice
Post Transfer Activities Switch from PSTN Test
Access to 21CN TAM Test Access Post transfer
checks Monitor network for fallback period
Decommission Redundant Equipment Hand-over to
Operations
21CN T/TH
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Post Transfer Activities - detail

• Post Transfer Checks
• PSTN disconnection tests (Every Line)
• MSAN connection (Non-intrusive) tests
• Review Monitoring
• Assess network performance against Fallback
  criteria (eg on the night test results /
  faults)
• 7 day monitoring period
• Fault Reporting
• Special measures will be in place for fault
  reporting for 7 day period.
• Additional resource available to deal with any
  reports