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Pathfinder Working Group

BT Centre Showcase, Registration: 9.45 amStart time: 10.00 am

Pathfinder Working Group - Agenda•.Introductions

•.Terms of reference and objectives of Pathfinder Working Group

•.Cardiff - The facts of Interconnection

•.BT’s view of technical issues/risks inherent in a hybrid interconnection model during Pathfinder

•.Proposed transfer methodology from DLE to NGS

•.Requirements for Pathfinder Programme - a free form brainstorming session designed to deliver a set of requirements specific to Pathfinder.

•.AOB •Customer Communication Plan•TSG Update



Working Group Terms of ReferenceKeith Fowler - Pathfinder Programme Manager.

Pathfinder Working GroupMembership• Industry representatives and BT Wholesale (co-chair arrangement)Proposed Terms of Reference• Phase 1 (now until June 05):

• Agree to conditions for collaboration during the Pathfinder period (Out of service Oct 05 – Dec 05, In service Jan 06 – March 06)• Capture Pathfinder Requirements from BTW Customers (close by 28-Feb) This has already begun through one-on-one calls• Agree to measurement points and reporting structure to provide all Pathfinder participants equal access to experiences and information

• Phase 2 (July 05 – April 06): • Issue of System Alternation Notices for Cardiff DLEs• Trial Industry collaboration in the migration of:

• Interconnect (target beginning migration Oct 05)• End Customers (mass migration Jan-Mar 06)

• Review of experiences and results Working Group Scope• All matters relating to migration of interconnect arrangements and consumer and

business customers to a 21CN environment, while not overlapping other working groups.

Meeting Frequency• Monthly or more frequently as required

Pathfinder Working GroupWithin Scope of Pathfinder Working Group•Determine criteria for collaboration during this period•Issue of System Alteration Notifications in July•Defined methodology for movement of end customer lines•Defined methodology for movement of services•Defined additional reporting requirements to test effectiveness of trial.

Outside Scope of Pathfinder Working Group•An agreed technical arrangement to enable DLE closure (Interconnect Working Group)•Agreed commercial arrangements for rearranging interconnects

•Charging Principles (Interconnect Working Group)•Contract Alterations (Standard Contracts Forum)

•Future interconnect (IP, etc.) (Interconnect Working Group)•LLU (Broadband and LLU Working Group)•Any other workgroup themes



Cardiff – The facts of Interconnection

Mark Ward, Head of Interconnect & Numbering Services

Cardiff Pathfinder area - Current Interconnect Arrangements• 9 impacted DLEs - 7 in Cardiff, plus Bridgend and Pontypridd

• Cardiff DLE units: CF/TY, CF/UC, CF/UD, CF/UE, CF/UF, CF/UG, CF/UL• Bridgend DLE unit: BNP/DA; Pontypridd DLE unit: PN/DA • All Cardiff DLE units are co-located with Cardiff Iolite NGS

• 7 impacted Altnets• 80% of circuits from 3 Altnets• Volumes are for all interconnect E1s, including FRIACO

Direct E1s Indirect IEC E1s CSI E1sCardiff DLEs 334 74 0Bridgend + Pontypridd 0 39 0

334 113 0



BT’s view of technical issues/risks inherent in a hybrid

interconnection model during Pathfinder

Risks and Issues associated with Interconnection arrangements and Pathfinder.•Risks:-•Non Movement of CP DLE Capacity prior to Pathfinder could result in:-

•Increased risk of call routing errors due to a complex data set(21CN – legacy network – CP’s network)•Increased risk of QoS issues e.g. call routing errors & over-used capacity•Any Operational issues resulting would cause increased manpower demands on both BT and CPs•Complication of eventual movement of Capacity prior to DLE closure.•Failure to fully test the full 21CN migration process and amend process if required

Risks and Issues associated with Interconnection arrangements and Pathfinder.•Issues •Known issues include:-

•Billing in line with commercial offer - EBC?•Some unsupported products post end-customer transfer e.g RBWF•Trial Contract •CPS SAD calls•Prove designs for continuity of Interconnect products to/from end customers.•Fall Back arrangements and criteria.•Availability of new 21C Interconnect Products

Mitigating RisksGoal is to migrate CP Interconnect prior to DLE end-user migration

•Provide sufficient time to assure stability for all•Avoid complex routing (21CN - NGS -CP) •Avoid need to replicate legacy/PSTN routings and data structures•Minimize impact on perceived QoS (complex call routing/’tromboning’)•Can migrate CP circuits over time without need for whole DLE at once migration•Disengage CP circuits from actual DLE closures

Pathfinder offers the opportunity to collaborate on the full migration process

• Trial methodology for moving CP Interconnect circuits over time (not directly tied to mass migration schedule)•Trial methodology for migrating end-users whole DLE at once• Provide feedback to improve processes prior to main 21C roll-out



Proposed Transfer Methodology from DLE to NGS

Legacy TDM Support - Transfer Engineering Proposals• Aims :-• To de-risk the transfers by use of existing NGS switches and network routings.• To provide separation of agreed transfer activities from progress on 21C build and DLE closures.• To enable balanced workload for all.• Scenarios :-• 4 that will apply in most circumstances - mix and match.• Last 2 may apply to balance NGS capacity• Not exhaustive - other options inc. Ceasing Capacity, new 21C products etc.• Not prescriptive - subject to bi-lateral agreement with each individual customer.

Figure 1a - Configuration ‘1’ - ISI Direct to DLE and NGS Sites No Spare NGS CP Route Capacity - Interconnect Scenario Before Transfer

DLE SITE

CPSwitch

NGSDLE 2 2

1CN

MGW

METRONODE

3 E1s

13 E1s

NGS SITE

CP CapacityBT Capacity

DLE SITE

NGS SITE

CPSwitch

NGSDLE 2 2

1CN

MGW

METRONODE

3 E1s

3 E1s

13 E1s

Figure 1b - Configuration ‘1’ - ISI Direct to DLE and NGS Sites No Spare NGS CP Route Capacity - Interconnect Scenario After Transfer


Figure 3a - Configuration ‘3’ - ISI Direct to NGS Site with IEC to DLE Site No Spare NGS CP Route Capacity - Interconnect Scenario Before Transfer

DLE SITE

CPSwitch

NGS

DLE 2

21CN

MGW

METRONODE


3 E1s

NGS SITE

13 E1s

IEC

Figure 3b - Configuration ‘3’ - ISI Direct to NGS Site with IEC to DLE Site No Spare NGS CP Route Capacity - Interconnect Scenario After Transfer

DLE SITE

CPSwitch

NGS

DLE 2

21CN

MGW

METRONODE


3 E1s

NGS SITE

13 E1s

Figure 6a - Configuration ‘6’ - ISI Direct to NGS Site with IEC to DLE Site No CP Route to Non Parent NGS - Interconnect Scenario Before Transfer

DLE SITE

CPSwitch

DLE 2

21CN

MGW

METRONODE

3 E1s

13 E1s CP CapacityBT Capacity

NGS

PARENT NGS SITE

NGS

NON PARENT NGS SITE

IEC

Figure 6b - Configuration ‘6’ - ISI Direct to NGS Site with IEC to DLE Site No CP Route to Non Parent NGS - Interconnect Scenario After Transfer

DLE SITE

CPSwitch

DLE 2

21CN

MGW

METRONODE

3 E1s

13 E1s


NGS

PARENT NGS SITE

NGS

NON PARENT NGS SITE

3 E1s

New Route(if not

already existing)


Requirements Capture for Pathfinder Programme.

Pathfinder Working GroupWithin Scope of Pathfinder Working Group•Determine criteria for collaboration during this period•Issue of System Alteration Notifications in July•Defined methodology for movement of end customer lines•Defined methodology for movement of services•Defined additional reporting requirements to test effectiveness of trial.

Outside Scope of Pathfinder Working Group•An agreed technical arrangement to enable DLE closure (Interconnect Working Group)•Agreed commercial arrangements for rearranging interconnects

•Charging Principles (Interconnect Working Group)•Contract Alterations (Standard Contracts Forum)

•Future interconnect (IP, etc.) (Interconnect Working Group)•LLU (Broadband and LLU Working Group)•Any other workgroup themes


ADDITIONAL TRANSFER ENGINEERING SLIDES – FOR

INFORMATION ONLY

Figure 2a - Configuration ‘2’ - ISI Direct to DLE and NGS Sites Spare NGS CP Route Capacity - Interconnect Scenario Before Transfer

DLE SITE

CPSwitch

NGSDLE 2 2

1CN

MGW

METRONODE

3 E1s

13 E1s 10 used for BH traffic

NGS SITE


DLE SITE

NGS SITE

CPSwitch

NGSDLE 2 2

1CN

MGW

METRONODE

3 E1s

Figure 2b - Configuration ‘2’ - ISI Direct to DLE and NGS Sites Spare NGS CP Route Capacity - Interconnect Scenario After Transfer

10 E1s


Figure 4a - Configuration ‘4’ - ISI Direct to NGS Site with IEC to DLE Site Spare NGS CP Route Capacity - Interconnect Scenario Before Transfer

DLE SITE

CPSwitch

NGS

DLE 2

21CN

MGW

METRONODE


3 E1s

NGS SITE

13 E1s

IEC

10 used

for BH traffic

Figure 4b - Configuration ‘4’ - ISI Direct to NGS Site with IEC to DLE Site Spare NGS CP Route Capacity - Interconnect Scenario After Transfer

DLE SITE

CPSwitch

NGS

DLE 2

21CN

MGW

METRONODE


3 E1s

NGS SITE

10 E1s

Figure 5a - Configuration ‘5’ - ISI Direct to DLE and NGS Sites No CP Route to Non Parent NGS - Interconnect Scenario Before Transfer

DLE SITE

CP

DLE 2

21CN

MGW

METRONODE

3 E1s

13 E1s


NGS

PARENT NGS SITE

NGS

NON PARENT NGS SITE

Figure 5b - Configuration ‘5’ - ISI Direct to DLE and NGS Sites No CP Route to Non Parent NGS - Interconnect Scenario After Transfer

DLE SITE

CP

DLE 2

21CN

MGW

METRONODE

3 E1s

13 E1s

CP provided (funded)

BT provided (funded)

NGS

PARENT NGS SITE

NGS

NON PARENT NGS SITE

3 E1s

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