1. Repeaterless DWDM – A 317km Caribbean Festoon Segment Upgrade with Terrestrial MSTP CANTO 2007 TRACK A Flamboyant South Wednesday 27 June 2007 Connecting the Caribbean 1:00 - 2:15 Emanuel Nachum Vice President, Americas Marketing

2. Outline Optical technology evolution 317KM festoon segment upgrade Using All-Range system Expanding services with Multi-Degree Optics

3. Fiber Plant Evolution of Wavelength Function Provisionable Transport Services Legacy WDM - Fiber Relief Solution Connection-oriented PSTN services Simple, predictable traffic SONET (and ATM, FR) used as provisionable transport

4. Fiber Plant ROADM Ethernet WDM (Virtual Fiber) Evolution of Wavelength Function Provisionable Transport Services Legacy WDM - Fiber Relief Solution Connection-oriented PSTN services Simple, predictable traffic SONET (and ATM, FR) used as provisionable transport Reconfigurable WDM – High Order Managed Transport Services become more dynamic (IP migration) Service bandwidth grows – IP Video OTN (G.709) provides OA&M for wavelengths

5. ROADM is key enabler of IP video applications Optical Technology Trends Reconfigurable metro/regional networks driving more power and distance Power and distance used for other long haul applications

6. Unrepeatered Submarine Systems The Caribbean has more than 1/3 rd of the world’s installed festoon route-miles (including ARCOS-1) Fiber count gap between existing and new cable systems widened greatly over last 5 years Much cheaper to operate and maintain unrepeatered festoon – O&M key factors today Upgrade existing undersea festoon and inter-island cable systems

7. 317 KM Festoon Segment Upgrade Antillas-1 between Punta Cana and Isla Verde Currently operating at STM-16 (2.5 Gb/s per pair) Field trial to determine how to implement DWDM Part of the proposed Trans-Caribbean Cable Network (TCCN) Tested link between Dominican Republic and Puerto Rico

8. Single-Channel Fiber Adapted to DWDM 30Km G.653 220Km G.654 67Km G.654 Erbium Doped Fiber Original Signal Propagation 67Km G.654 220Km G.654 30Km G.653 Erbium Doped Fiber Rotated Signal Propagation Low-dispersion G.653 (Z-fiber) at beginning of span with high launch power would induce strong four-wave mixing “Logically rotating” the link enables DWDM since receive power is too low to cause nonlinear degradation

9. Unrepeatered single spans over 300km Inter-metro spans up to 2000km w/o OEO CWDM interworking In-line amps Metro ROADM/DWDM Networks All Range™ Optics – One Platform Packet Optical Convergence Carrier Ethernet / MPLS Legacy protocols Optical or electrical switching Extended Reach E-FEC Dual stage ROADM EDFA Low-cost regional RAMAN NG DWDM Technologies 10-degree ROADM Enhanced power control Wavelength management

10. Using All Range™ Terrestrial DWDM 67Km G.654 220Km G.654 30Km G.653 Erbium Doped Fiber Rotated Signal Propagation Backward Raman Forward Raman (and ROPA pump*) EDFA Booster EDFA Pre-amp EDFA booster and pre-amp combined with forward and backward Raman pumping One system for undersea transport plus metro aggregation and service delivery Commonality reduces equipment cost, inventory, and operator learning curve *ROPA becomes transparent with high signal power

11. Dominican Republic Puerto Rico 317 Km Antillas-1 Segment Upgrade Benefits Eightfold increase of system bandwidth Use of cost-effective terrestrial DWDM platform Integrated multi-degree ROADM, Next-Gen SONET/SDH and MEF-certified Ethernet/MPLS switch for NGN service delivery Future DWDM enhancements can further increase capacity without modifying the cable system G.654 + passive EDF + G.653

12. Multi-Degree Attribute m 1 n   Mux / Demux One Degree n 1 n   m OADM Two Degrees WSS ROADM Ten Degrees o m n p q r s t u v

13. Subtend Ring Fixed Filter Provisioning Backbone Ring Access Ring Site 1 Site 3 Site a Site b Site 4 Provisioning a new channel from Site y to Site 2 Optical budget is affected on several spans Truck rolls required at hub sites (mux/dmx) and endpoints to install transponders – even with APC Site 2 Site y Site x This is hard work!

14. Subtend Ring Multi-Degree ROADM Provisioning Backbone Ring Access Ring Site 1 Site 3 Site a Site b Site 4 Provisioning a new channel from Site y to Site 2 Minimal impact to optical budget – instantly adjusted Brief visits only at endpoints to install port cards – no tuning, cross patching, amp/regen install, or revisits Sites may be pre-provisioned and lit up later remotely Site 2 Site y Site x Remote command Hey, this is easy! See?

15. 10-Degree ROADM – More Efficient Networking Multi-Degree ROADM Traditional DWDM Core Ring 10 Subnetwork 10 Add / Drop 3 Shelves 50 Transponders 42 Fiber Cables 1 Shelf 10 Transponders 32 Fiber Cables Versus

16. Broadband Services Down Island Onshore optical networks quickly growing into multi-service ROADM applications Broadband Wi-Fi/Wi-Nax, Mobility, Multi-service backhaul, etc. Network infrastructure that can dynamically adapt to changing subscriber demands: Reduces OpEx and CapEx while delivering Ethernet-based, on-demand services Quick and easy modifications of optical network designs as demands change Eliminate the need for traffic pre-planning and forecasting Eliminate the need for truck rolls Support complex topologies such as multi-ring and mesh with any to any connectivity and no back to back systems

17. Multi-Degree ROADM Flexibility Provides rapid turn up of new wavelengths and sites Allows efficient creation of access/subtended WDM rings off backbone network w/ ALL-OPTICAL signals Does not require back to back DWDM nodes Subtended Festoon Island Backbone Ring Access Ring Site 1 Site 2 Site 3 Site a Site b Site x Site y Site 4

18. Multi Degree Optical Networking Metro/Regional Long Haul 10-Degree All Range™ ROADM MEF Certified MEF Certified 80 Channels 2,000KM 80 Channels 2,000KM Beyond ROADM: Multi-Degree Packet–Optical Convergence Ethernet Switch Tunable MuxPonders NG-SONET Switch Multi-degree convergence of packet + optical and “dry” metro flexibility + “wet” long haul reach

19. Summary – Upgrade Existing Festoon Avoid expense of installing new cable system for more capacity Retain economical operation & maintenance of unrepeatered festoon Lower costs – substitute traditional undersea DWDM with all-range terrestrial DWDM One Multi-Service DWDM system for onshore service delivery and offshore transport

20. Thank You emanuel.nachum@ecitele.com