1. All rights reserved © 2005, Alcatel Presentation Title / Date Approved Access Architecture

2. All rights reserved © 2005, Alcatel Presentation Title / Date Page 2

3. All rights reserved © 2005, Alcatel Presentation Title / Date Draft Transitional Aggregation Architecture

4. All rights reserved © 2005, Alcatel Presentation Title / Date Page 4 Edge and Aggregation Site  Edge Sites Sites with Network Edge capability May be Tier 0, 1 or 2 locations only Network Edge capability deployed as aggregate service demand requires Has all Aggregation site functionality  Aggregation Sites Tiered sites without Edge capability May be any Tier 0, 1, 2 or 3 locations  Other sites Any site that has not been allocated as Tier 0/1/2 or 3 and maybe closed

5. All rights reserved © 2005, Alcatel Presentation Title / Date Page 5 Distribution Edge Aggregation Curb Side Curb Side Curb Side Curb Side MPT NE Edge Site Note For simplicity this diagram does not show all diverse links. Diverse links will be used wherever required to satisfy availability targets Aggregation Site Edge Site MPT ETH MPT ETH Ethernet IAD BLC Ethernet IAD BLC Ethernet IAD BLC Ethernet IAD BLC Ethernet IAD BLC Ethernet IAD BLC Ethernet IAD BLC ETH Ethernet IAD BLC Transitional Aggregation Architecture - Equipment

6. All rights reserved © 2005, Alcatel Presentation Title / Date Page 6 Distribution Edge Aggregation Curb Side Curb Side Curb Side Curb Side AAN NE Edge Site Note For simplicity this diagram does not show all diverse links. Diverse links will be used wherever required to satisfy availability targets Aggregation Site Edge Site AAN Ethernet CNE CAM Ethernet CNE CAM Ethernet CNE CAM Ethernet CNE CAM Ethernet CNE CAM Ethernet CNE CAM Ethernet CNE CAM CAM, AAS Ethernet CNE CAM CAM, AAS, AAN Transitional Aggregation Architecture - Functions MPT AAN MPT AAN CAM, AAS, ACS

7. All rights reserved © 2005, Alcatel Presentation Title / Date Page 7 Distribution Other Site Cabinet Aggregation Aggregation Site Edge Cabinet MPT NE Edge Site Note For simplicity this diagram does not show all diverse links. Diverse links will be used wherever required to satisfy availability targets MPT BLC ETH BLC Edge Site Other Site Cabinet BLC Other Site Other Site MPT Cabinet BLC Cabinet BLC Marconi MPT Marconi Transitional Aggregation Architecture – Including Other sites, Legacy Ethernet NE MPT ETH MPT ETH

8. All rights reserved © 2005, Alcatel Presentation Title / Date Page 8 Customer Regional ATM Access Aggregation Architecture Aggregation Distribution Edge MSE Cabinet DSL IAD Edge Aggregation MPT Cabinet DSL IAD Other Cabinet DSL IAD MPT 7670 BRAS 7670

9. All rights reserved © 2005, Alcatel Presentation Title / Date Page 9 Customer Regional Ethernet Access Aggregation Architecture Edge/Aggregation rings/arcs Aggregation Distribution Edge MSE Cabinet DSL OLT IAD ONT CNE Mobile Base Station BS Edge Aggregation MPT Cabinet DSL IAD OLT ONT CNE Mobile Base Station BS MPT Ethernet Switch MPT Ethernet Switch

10. All rights reserved © 2005, Alcatel Presentation Title / Date Page 10 Customer Ethernet Access Aggregation Architecture Other sites point to point Aggregation Distribution Edge MSE Cabinet DSL OLT IAD ONT CNE Mobile Base Station BS Edge Aggregation MPT Cabinet DSL IAD OLT ONT CNE Other Mobile Base Station BS Cabinet DSL IADCNE MPT Ethernet Switch MPT Ethernet Switch

11. All rights reserved © 2005, Alcatel Presentation Title / Date Architecture Functional Blocks

12. All rights reserved © 2005, Alcatel Presentation Title / Date Page 12 Functional block functions – Customer Premises  Customer Premises User  A user may be a person or system who generates or consumes information CPT – Customer Premises Terminal  Application Server –Where customer applications run. –Provides adaptation of User I/O to the CPN and Network Application Service.  User I/O Interface –Provides the user the ability to input information to the CPT and/or receive information from the CPT. CPN – Customer Premises Network  Provide transport within the customer premises (includes devices and medium) CPE – Customer Premises Equipment  (or CAF TBC) Customer Adaptation and Forwarding –Forwarding and adaptation functions between the customer premise and the network environment. –Forwarding functions within the customer premise. CNE – Customer Network Edge  Terminates the Network Access Service.  Terminates the Network Connectivity Service CPE CPN CPT CNE CAM CAN AAS AAN ACS NE NC EDN NC INN

13. All rights reserved © 2005, Alcatel Presentation Title / Date Page 13 Functional block functions – Access  Access CAN – Customer Access Network  Distribution – Last mile connection to customer premises  Transport for access connection from customer premises to first point of aggregation CAM – Customer Access multiplexer  Terminates CAN  First point of aggregation and congestion of multiple customer access connections, Access Node  Applies QoS policies to individual access connections and customer services  Aggregates multiple access connections into one or more aggregated network facing pipes AAS – Access Aggregation Switch  Aggregates and concentrates multiple aggregate pipes from CAM’s into one or more aggregate network facing pipes  Applies QoS policies to aggregate traffic flows AAN – Access Aggregation Network  Provides transport for aggregate pipes from AAS to ACS  Provides route diversity and protection switching where required ACS - Aggregation Concentration Switch  Aggregation of multiple aggregate pipe interfaces directly from CAMs, AASs and the AAN  Applies QoS policies to aggregate traffic flows  Grooming of aggregate access connections and handing of aggregate access connections to the appropriate Network Edge CPE CPN CPT CNE CAM CAN AAS AAN ACS NE NC EDN NC INN

14. All rights reserved © 2005, Alcatel Presentation Title / Date Page 14 Functional block functions – Core  Core NE – Network Edge  Terminates the Network Access Services  Applies ingress and egress QoS policy to customer’s Network Connectivity Services  Forwards Network Connectivity Services from the core to the access and visa-versa. EDN – Edge Distribution Network  Aggregate NE interfaces if required  Provides transport between NE and two diverse NCs NC – network Core  Provide MPLS switching between interfaces INN – Inter-Nodal Network  Point to Point transport between NCs CPE CPN CPT CNE CAM CAN AAS AAN ACS NE NC EDN NC INN

15. All rights reserved © 2005, Alcatel Presentation Title / Date Page 15 DefinitionCurrent MSC Correlation Current EAP Correlation Current DSL Correlation NGN network Correlation INN Inter-Nodal transport Network SDH, Fibre, DWDM, MPLS --DWDM NC Network CoreT320 Router--T320 EDN Edge Distribution NetworkDWDM/ Direct Fibre/ SDH --DWDM/Direct Fibre NE Network EdgeM40E Router, ERX BRAS, etc M40E RouterERX BRASMSE ANI Access – Network Interface Boundary between Access and Core domains MDF/DDF for PE interfaces MDF/DDF for PE/RS38K/7670 interfaces MDF/DDF for PE/7670 interfaces ACS Aggregation Concentration Switch -RS38K, 7670 ATM7760 ATMEthernet Switch (VPLS capable) AAN Access Aggregation Network-GE over Direct Fibre, ATM ATM over SDHMPT AAS Access Aggregation Switch-RS38K7470/7670 ATM, DSLAMsMPT/Ethernet Switch CAM Customer Access Multiplexer-RS38K, RS3KDSLAM’s (ASAM,Nokia,Conklin) BLC, MPT, Ethernet switch CAN Customer Access Network-Direct Fibre, Direct Fibre with media converters Copper DistributionCopper, Fibre Distribution CNE Customer Network Edge-3700, 2821, ????-IAD (for MSSA),ONT (FTTP), Router (POF etc) UAI User – Access Interface Boundary between Access and Customer domains -Ethernet port on CLNECopper access point at Premises CPE Customer Premises Equipment --DSL Modem CPN Customer Premises Network---Internal wiring, Home network, etc CPT Customer Premises Terminal---Black phone, Set top box, PC etc CPE CPN CPTCNECAMCANAAS AAN ACSNENC INN EDN Customer Domain Access Domain Core Domain UAIANI NINC EDN NNI