Ofcom Consumer Switching BT Wholesale Timelines 14 April 2014

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Key Dates – BTW Assumptions The last Release in which BTW can deliver functionality, in order to meet the start of testing (January 2015) is Release AQ (deployed 17th November, 1 week ahead of EMP R2700) CP impacting designs will need to be delivered over two BTW Releases (AP, AQ) to give BTW CPs enough time to consume BTW changes and be ready for testing BTW 90 day legal notification date for Release AP is 17th June, documentation to be published 12th June – in this release we will focus on designs for which we have minimal/no Openreach dependencies AQ is therefore the release in which we need to consume CP impacting changes from Openreach - otherwise we will not be able to give our CPs sufficient notice to consume BTW changes and will not be able to complete our deliveries this calendar year

Key Dates – BTW Assumptions continued BTW 90 day legal notification for Release AQ goes is 19th August, documentation to be published 14th August This means that in order to be able to proceed with no risk to BTW or downstream CPs, we need all of Openreach’s CP impacting design collateral at the start of our Release AQ design cycle (19th May) It is possible that development completed in Release AP/AQ will not be capable of being tested in interlock environment. BTW CPs will therefore be developing with this risk.

Key Dates aligned to BTW and OR deliveries

STORM ref STORM Story Title Story Title Design Release 21CNCE-75918 Ofcom NoT – introduction of RID and postcode to provides Make RIDs mandatory for all migration + provides, validate and pass down to OR across all product types. Provide and migration orders will be validated on DN + Postcode Design AP 21CNCE-76733 Strategic KCI's for Broadband cease notifications sent from openreach Consumption of OR Unsolicited cease KCI’s and passing through to CPs via B2B, email. Release AP 21CNCE-76746 Strategic KCI's for Broadband loss notifications sent from BTW Generation of Notice of Transfer KCIs for BTW CP to BTW CP migrations via B2B, email. 21CNCE-77354 Ofcom NoT - Migrations to 20C within BTW CPs All of the migrations to 20C within BTW CPs Design AQ Release AQ 21CNCE-77371 Ofcom NoT - Migrations to WBC Copper within BTW CPs All of the migrations to WBC Copper within BTW CPs 21CNCE-77388 Ofcom NoT - Migrations to WBC FTTC within BTW CPs All of the migrations to WBC FTTC within BTW CPs All of the migrations to WBC FTTP within BTW CPs LLU to all product variants (remove MAC validation from provide onto OR) 21CNCE-77405 Ofcom NoT – Gaining CP Cancellation driven KCIs Gaining CP Cancellations Bulk LLU to WBC migrations via BUT (BBCT) Bulk migrations within the BTW stack but with a CP change via BUT (BBCT) 21CNCE-77419 Ofcom NoT - Cancel Other for BTW CP to BTW CP migrations Cancel other for BTW CP to BTW CP migrations 21CNCE-77431 Ofcom NoT - Cancel Other for BTW to LLU CP migrations Cancel other for BTW to LLU CP migrations Consumption of cancel other when LLU CP cancels BTW migration Ofcom NoT - MIS and Reporting of Cancel Other’ - on hold wtg Ofcom guidance MIS and Reporting of cancel other