21 st April 2010
BT's 21CN programme is subject to consultation and further development. Dates and other details should be treated as indicative only, and subject to change

21CN Deployment Strategy (DSP) update:
• 21CN voice end user migrations (Pathfinder Volume POTS
• Key product updates – Broadband, Wholesale Ethernet,
MSIL & PPCs
Pathfinder network upgrades progress
Q&A, feedback & poll
Speakers: Nigel Scott, Becky Hewlett, Chris Basey

BTW, Industry Consultation
BT's 21CN programme is subject to consultation and further development. Dates and other details should be treated as indicative only, and subject to change

21CN Deployment Strategy Plan
• The latest DSP was issued on 15 th April 2010
• Available via the secure area of the Consult21 website
– www.btwholesale.com/consult21 *
• BT remains committed to its objective of implementing 21CN; a multi-service, single network platform, based on IP technologies
• 21CN remains an important strategic project for BT Group and investment in it continues at a pace, especially in the new product areas, such as Broadband &
Ethernet (covered later)
For access to the secure area please contact consult21@bt.com

21CN voice end user migration plans
• As reported on the January webcall BT has been reviewing implementation plans for 21CN voice end user migrations
• Many aspects have been considered for the review
• BT has decided to halt all plans to migrate further voice lines to the 21CN voice platform, including the 275,000 voice lines planned for Pathfinder Volume POTS.
• All currently planned trials of ISDN have also been stopped.
• We now think further mass migrations to the 21CN voice platform are unlikely.
• Those customers already migrated to the 21CN voice platform will remain –
~ current voice network improvement upgrades will continue
~ the programme to migrate/re-migrate groomed and regressed lines is continuing
• BT will continue to maintain the quality of voice services over its 20C network – there is more confidence that this can be sustained for a number of years

21CN voice end user migration plans
• A briefing and white labelled slide pack has been developed for you to use internally and as the basis of any discussions with your customers.
• The briefing was issued to the Consult21 distribution via the briefing portal on
13 th April 2010 and is available via: http://www.btwholesale.com/pages/downloads/21_Century_Network_Community/c
21_IM_042_Issue1_130410.zip
• Information is also contained in the DSP

21CN voice end user migration plans – what does this mean to Consult21?
• There will be an impact on a number of Consult21 working groups and experts’ groups - mainly associated with the Implementation & Migration
Working Group (IMWG)
• We’ll be explaining what this halt means at the specific groups and give full details at the next IMWG on 29 th April
• We’ll ensure that all learning and outstanding issues from these groups are captured
• We will continue to engage with industry on future consultation areas
• The Steering Board will continue – refocused to a discuss wider topics

21CN Deployment Strategy Plan (DSP) – product news –
• IPstream and Datastream are retained on the current broadband platform until their withdrawal from service and are not migrated to 21CN
• Withdrawal information was shared on the January webcall & are detailed in the
DSP
• Are replaced by 21CN broadband products that provide similar and enhanced end user functionality – Wholesale Broadband Connect (WBC) and Wholesale
Broadband Managed Connect (WBMC).
• WBC & WBMC are available at 855 sites serving more than 55% of UK homes and businesses
• Continuing, subject to wholesale customer demand, to extend the WBC footprint further – to cover up to 75% of UK end users by Spring 2011, serving around 20 million UK homes and businesses.
• Service Availability datasets for WBC rollout are updated monthly via the
Service Availability area of btwholesale.com

21CN Deployment Strategy Plan (DSP) – product news –
• 808 nodes rolled out to date
• Further nodes will be rolled out progressively, subject to customer demand, in 2010

21CN Deployment Strategy Plan (DSP) – product news –
Multi Service Interconnect Link (MSIL)
• Ethernet MSIL interconnects BT’s 21CN with other Communications
Providers NGNs
• Allows customers to take multiple services over the same interconnect link
• BTW is developing a resilient MSIL option to provide resilient MSIL pairs at Metro-node sites
– provided via separate Ethernet Edge Aggregators
• The product name will be MSIL Secure and it’s planned to make this product available for order from 13 th May 2010.

21CN Deployment Strategy Plan (DSP) – product news –
2Mbit/s (and above):
• Product is being retained (with 21CN components replacing obsolete
20C network components over time)
• Initial technical trial to commence in Quarter 1 of 2010/11 to prove that the change out of the core network components is seamless
Sub 2Mbit/s PPCs
•
No change from information shared on the January webcall:
• Sub 2Mbit/s PPCs will be maintained on the DPCN until 2018

12

• All CMSAN upgrades have been successfully completed except for
Roath that is now planned for 23 April 2010
• hub upgrades took on average less time than planned
• linecard upgrades took on average the planned time
• Call Server upgrade dates are being replanned
• 20 th and 27 th April no longer achievable
• may be delayed until early June 2010

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consult21@bt.com