Implementation & Migration Working

Group18th January 2006

Kevin Young

Interconnect & Numbering Services

The information in this presentation relates to plans currently under development and subject to consultation, and may be subject to change. Detailed implementation depends upon a number of factors including the capabilities of suppliers and the final 21CN network design.

NGS Capacity Check Request Process

CP Requires Change of Target NGS for 21CN DLE Migration

BT Assesses

And Agrees

Change of Target NGS

BT Internal Process To Implement

Change

NGS Capacity Check Process Completed

CP Decides To Use Original Target NGS

Original Target NGS Used

Alternative Target NGS

Used

CP Instigates SIA Contract Dispute

Procedure

No

No

Yes

A A

Yes

BT Accepts Check Request

For Assessment?

Yes

No

CP Submits NGS Capacity Check

Request

CP Escalates to BAU BT Disparity Resolution Team

NGS Capacity Check Request

Process Flowchart

NGS Capacity Check Request Process Milestones

• DSAN Issued

• NGS Capacity CR Forms submitted to BT by CPs cut-off

– DSAN Issue + 1 week

• NGS Capacity CR Assessment start

– DSAN Issue + 2 weeks (1 week allowed for iteration between BT and CP to ensure CR is accepted for assessment)

• NGS Capacity CR Assessment complete & CP notified of result

– DSAN Issue + 4 weeks

• NGS Capacity CR Assessment result accepted by CP or escalated to BT Disparity Resolution Team

– DSAN + 5 weeks

• NGS Capacity CR Assessment result escalation to BT Disparity Resolution Team considered and result communicated to CP

– DSAN + 6 weeks

NGS Capacity Check Request Process Milestones

• NGS Capacity Check Request Form:

Will be a Pro-Forma

Should be submitted separately for each DLE in the tranche covered by the DSAN where a change is required

Should contain description of change required

Should contain detailed reason for request and justification, including diagrammatic representation and ramifications of CR rejection

Should be submitted by the cut-off date for the tranche

Should contain BT assessment result, including reasons for rejection where appropriate

• NGS Capacity Check Requests:

Will be assessed as a batch for all CPs for a tranche

Will be assessed by the BT team responsible for managing NGS Capacity within the 21CN Programme.

• NGS Capacity Check is managed through the existing TAM/CP relationship