BT Wholesale

1
BT Wholesale TDM Circuit Strategy Evolution
rather than revolution
Consult 21 Industry Webcall 29th January 2009
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AGENDA

• Welcome and Introductions
• Products Positioning
• Confirmation of the TDM strategy
• Sub 2M/bits TDM circuits approach and feasibility
• Feasibility results for 2M/bits and above TDM
  circuits
• Infrastructure Change out
• Next steps, timings and plans
• Summary
• QA session

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Positioning of TDM products
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Confirmation of the 2Mbit/s above TDM strategy
HOW gt Two distinct bandwidth areas Sub
2Mbit/s 2Mbit/s above Based on consultation
with Industry Use of formal feasibility study to
assess Shared with industry WHAT gt Deliver the
same product functionality as 20C Continue to
offer Customer Experience as is currently
provided on 20C Ensure changes are in
collaboration with Customers with minimal service
impact Intention is to retain existing systems
for ordering, billing, faults etc Upgrade
obsolete 20C infrastructure with 21CN Native TDM
components Minimize disruption as a result of
infrastructure upgrades Native TDM Services
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Feasibility approach for sub 2M/bits TDM
circuits

• Feasibility has started
• Interim Update March 2009
• Expected completion June 2009
• Covers Analogue Digital Services, based on the
  requirements fed in from all
• interested industry bodies
• Specific focus to maintain comparable E2E
  performance as existing services

6
Feasibility results for 2M/bits above TDM
circuits

• A phased approach allowing withdrawal of legacy
  infrastructure systems with
• minimum customer disruption and over time
  replacing obsolete components
• with 21CN Native TDM compliant components and
  systems supporting existing
• products
• Continue with the majority of our 20C PPC
  portfolio
• Continue to use native SDH technology (no
  emulation).
• Retain existing Access and NTE
• Infrastructure upgrade activity will take place
  as business as usual
• The PPC product will retain its existing
  framework - i.e. a Point of Handover (POH), a 3rd
  Party end and a Circuit between these two points
• PPC services (including PPC V1 and PPC V2) will
  continue to be delivered as per the current
  product definition.

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TECHNOLOGY CHANGEOUT STRATEGY
Existing transmission TDM services

• 21CN transmission is same technology as 20CN SDH
  WDM just more up to date equipment
• 21CN transmission is a bearer for 21CN NGN
• 20CN transmission is separate not currently
  connected to 21CN
• All TDM is currently routed over 20CN

21CN NGN
21CN Transmission
PoH
Legacy Transmission
3rd Party
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TECHNOLOGY CHANGEOUT STRATEGY
Upgrade of obsolete 20CN to 21CN infrastructure

• Need to begin to move customer sites onto 21CN to
  close 20CN infrastructure as it becomes obsolete
• Customers with multiple sites will have some
  delivered on 20CN infrastructure and some on 21CN
  infrastructure during the changeover
• This will result in mixed 20CN 21CN
  infrastructure
• UPGRADE WILL BE PLANNED TO MINIMIZE DISRUPTION

21CN NGN
21CN Transmission
3rd Party
3rd Party
PoH
Legacy Transmission
3rd Party
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Next steps, timings and plans
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TDM STRATEGY SUMMARY Evolution not Revolution

• Industry consultation and customer feedback has
  shaped the decision process
• Two separate areas involved - Below 2Mbit/s and
  above 2Mbit/s
• Sub 2Mbit/s Feasibility continues
• 2Mbit/s PPCs remain on the BTW portfolio until
  well into the next decade
• Native SDH Technology
• Existing PPC functionality will be supported
• Existing NTE will continue to be used and
  replaced only when obsolete
• 21CN components in solution design for 2009
  deployment
• Transformation will be infrastructure
  upgrades will be phased
• Engagement remains pro-active through Consult 21
  and ongoing

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GLOSARY OF KEY TERMS
Native TDM Non emulated transmission providing
contention free point to point bandwidth Legacy
Pre 21CN equipment maintained in the
network Bearer A higher bandwidth circuit that
can carry a lower bandwidth circuit
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• QA session