Repeaterless DWDM – A 317km Caribbean Festoon Segment Upgrade with Terrestrial MSTP

Repeaterless DWDM

– A 317km Caribbean

Festoon Segment

Upgrade with

Terrestrial MSTPCANTO 2007

TRACK A Flamboyant South

Wednesday 27 June 2007Connecting the Caribbean 1:00 - 2:15

Emanuel Nachum

Vice President, Americas Marketing

Outline

Optical technology evolution

317KM festoon segment upgrade

Using All-Range system

Expanding services with Multi-Degree Optics

Fiber Plant

Evolution of Wavelength Function

Provisionable Transport

Services

Legacy WDM - Fiber Relief SolutionConnection-oriented PSTN services

Simple, predictable traffic

SONET (and ATM, FR) used as provisionable transport

Fiber Plant

ROADM

Ethernet

WDM (Virtual Fiber)

Evolution of Wavelength Function

Provisionable Transport

Services

Legacy WDM - Fiber Relief SolutionConnection-oriented PSTN services

Simple, predictable traffic

SONET (and ATM, FR) used as provisionable transport

Reconfigurable WDM – High Order Managed TransportServices become more dynamic (IP migration)

Service bandwidth grows – IP Video

OTN (G.709) provides OA&M for wavelengths

ROADM is key enabler of

IP video applications

ROADM is key enabler of

IP video applications

Optical Technology Trends

Reconfigurable metro/regional

networks driving more power and

distance

Reconfigurable metro/regional

networks driving more power and

distance

Power and distance used for other long haul applications

Power and distance used for other long haul applications

Unrepeatered Submarine Systems

The Caribbean has more than 1/3rd 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

Upgrade existing undersea festoon and

inter-island cable systems

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

andPuerto Rico

Tested link between

Dominican Republic

andPuerto Rico

Single-Channel Fiber Adapted to DWDM

30KmG.653

220KmG.654

67KmG.654

Erbium Doped Fiber

Original Signal Propagation

67KmG.654

220KmG.654

30KmG.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

Unrepeatered single spans over 300km

Inter-metro spans up to 2000km w/o OEO

CWDM interworking

In-line amps

MetroROADM/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

Using All Range™ Terrestrial DWDM

67KmG.654

220KmG.654

30KmG.653

Erbium Doped Fiber

Rotated Signal Propagation

Backward RamanForward 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

Dominican Dominican RepublicRepublic

Puerto RicoPuerto Rico

317 Km317 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.654 + passive EDF + G.653G.653

Multi-Degree Attribute

m1

n

Mux / DemuxOne Degree

n

1 n

m

OADMTwo Degrees

WSS ROADMTen Degrees

o

mn p

q

r

stu

v

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 2Optical budget is affected on several spansTruck 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!

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 2Minimal impact to optical budget – instantly adjustedBrief visits only at endpoints to install port cards – no tuning, cross patching, amp/regen install, or revisitsSites may be pre-provisioned and lit up later remotely

Site 2

Site y

Site x

Remote command

Hey, this is easy!See?

10-Degree ROADM – More Efficient Networking

Multi-Degree ROADMTraditional DWDM

Core Ring

10 Subnetwork 10 Subnetwork

10 Add / Drop

3 Shelves

50 Transponders

42 Fiber Cables

1 Shelf

10 Transponders

32 Fiber Cables

Versus

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

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

FestoonIsland Backbone

Ring

Access

Ring

Site 1

Site 2

Site 3

Site a

Site b

Site x

Site y

Site 4

Multi Degree Optical Networking

Metro/Regional Long Haul10-Degree All Range ™ ROADM

MEF Certified

MEF Certified

80 Channels 2,000KM

80 Channels 2,000KM

Beyond ROADM: Multi-Degree Packet–Optical Convergence

EthernetSwitch

Tunable MuxPonders

NG-SONETSwitch

Multi-degree convergence of packet + optical and “dry” metro flexibility + “wet” long haul reach

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

Thank You

emanuel.nachum@ecitele.com