Consult 21 Interconnect Working Group 7 Nov 2005 Ian Self Virtual Interconnect Capacity Product Outline 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.

Brief Recap Provide continuity of LES rate through the DLE migration to 21CN Maintain the competitive status quo Pricing replicates physical products As simple as possible

Consultation open to all Thank you to the CPs who contributed questions and proposals:

Decision Making process 1.Start with principle of current world replication 2.If unanimity on a change to current world this has been adopted 3.If no unanimity then the consensus view has been adopted providing it is consistent with point 1. e.g:  Excess circuits v.s. excess ST p.p.m.  Virtual ports v.s. port charge savings from consolidation of tandem minutes

Going Forward Strong demand from several CPs for early launch of VIEC product to meet expansion plans Product Description drafted – moving to solution design Further consultation on numbers in monthly minutes table Solution Design Consultation on monthly minutes table Product Structure Consultation Concluded

Product Outline 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.

Routing Options (CP selects one option across the board) Both options refer to:  Individual NGS  Specified set of traffic types Little demand for third option 1. Segregated LES Route NGS CP Switch Tandem Calls DLE A DLE B DLE A DLE B LES rate applies to specific Route ID NGS 2. Consolidated NGS Route CP Switch CP Switch LES rate ignores Route ID oror

Circuit Provision (Both Options) CP pre-selects the capacity to each virtual destination Connection and rental charges the same as physical equivalents ISI Mux at NGS Sites, CSI Mux at customer site If Mux/NGS/DLE co-located then IBC charge only Either physical or virtual port for each E1 of virtual capacity No Mix of Friaco and other traffic MUXMUX NGSNGS Tandem* DLE 1 DLE 2 DLE 3 DLE 4 5 E1 Virtual Capacity Virtual Capacity Distance 3 Physical IBCs 2 Virtual IBCs * For consolidated NGS option only

Call Billing Calls to/from Virtual DLE destinations at LES rate Selectable by traffic type Specific Route ID if CP has segregated DLE partition Call Bill format unchanged (excess bill separate) Standard EBC unchanged – applies to tandem routes Custom EBC file applies to consolidated and segregated DLE routes

Circuit Ordering Lead times Capacity provided in whole calendar months to align with call billing. Lead times driven by EBC and physical provisioning processes. To be determined during solution design and likely to change from current. Order New Reconfigure Cease EBC cut off Physical port / circuit lead times Circuit billing cut off Routing plan lead times

Capacity Management Monthly calculations – all respondents requested Pence per Minute Excess – only 1 CP wanted excess cct charge  Excess based on ST except DT for long distance IECs and tandem capacity overflow Peak Erlangs per destination based on TC4 capacity - no objections Separate Day/Evening/Weekend minutes  Protects CPs with high off peak traffic  Avoids average Day/Evening/Weekend rate for overflow Further analysis / consultation required on ratio of peak to average traffic  this drives the number of monthly minutes per peak hour erlang

Minutes per month Table Further consultation required on table values Figures below illustrate structure and are not a proposal or an offer

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