1. © 2010 Verizon. All Rights Reserved. PTEXXXXX XX/10 Marcel Rijnders Director EMEA Managed Services September 20, 2010 Commercial Deployment of 100G Ultra-Long-Haul Optical System in Verizon's Core European Network

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3. 3 Verizon European Backbone Growth Requirements Capable to support hybrid capacity growth –Mix of 10Gb/s, 40Gb/s and 100Gb/s High performance and low latency –Avoid the use of DCMs Compatible with existing photonic layer infrastructure –Expanding system lifetime –Maintain existing line amplifiers, mux/demux devices and wavelength selective switches Toleration to typical physical plant uncertainties –Mix of various fibre types, connectors, splices, re-routes, etc. Service interruption free capacity upgrades –Avoid major network disruptions and/or high risk maintenance Easy reconfiguration with minimal physical labour –Employ standard Field Operations staff –Limit logistics and truck loads

4. 4 Verizon European Backbone 100Gb/s Production Deployment Network Section Paris – Frankfurt –Ciena DWDM CPL & OME6500, 88 channel DCM-less –890 km optical distance –Utilisation >30 x 10 Gb/s wavelengths –13 x amplified spans –5 x Raman (loss > 23dB) –6 x ROADM with 50 GHz WSS Paris Frankfurt Line Amplifier Glass-Thru site WSS ROADM CPL Raman Link 890 km

5. 5 Verizon European Backbone 100Gb/s CoFDM Modem Transmitter Based on commercially deployed 40Gb/s technology Data rate 115Gb/s (2 x 14.4 GBaud DP-QPSK) Optical subcarrier spacing 20GHz Receiver Optical mixing & electrical LP filtering Coherent DSP processing +/- 50,000 ps/nm ~25 ps mean DGD Proprietary hard FEC (7% OH, 9.2dB coding gain) BER = 3.8E-03 corrected to < 1E-15 f-  ff+  f

6. 6 Verizon European Backbone Pre-Deployment Testing Lab spectrum identical to field >30 de-correlated 10Gb/s signals OSNR margin > 6dB

7. 7 Verizon European Backbone Production Deployment Operational since December 2009 No system failures reported –Pre-FEC BER < 1E-04 (FEC limit = 3.8 E-03) Client access 10 x 10GE carrying real time traffic

8. 8 Verizon European Backbone Summary Operational and error free 100Gb/s production system –Minimal field staff training required –No more than standard care is needed Simple (10Gb/s) engineering rules –No modifications needed in the optical plane Very straightforward deployment –Installation of equipment only at terminal sites –Highly automated commissioning due to modem training NEXT Further expansion of 100Gb/s channels in Verizon’s backbone –Enhanced scalability of the Ultra-Long-Haul network –All routes confirmed for scaling to 100Gb/s Deployment of 100GbE client interfaces –Standard is now defined: IEEE 802.3ba –Router suppliers ready to deliver Ethernet PICs Deployments of 10x10Gb/s Multi-Rate client interfaces –10GE, STM64, OTU-2 –Migration of existing lower rate interfaces onto 100Gb/s channels

9. 9 Acknowledgments Verizon - R. Egorov, C.le Scanve, C. Goedhart, B. Basch, G. Wellbrock, Stu Elby, Ciena – Mark Gibbon, Jamie Jefferies, Michel P. Belanger, Bernard Villeneuve, Mike Moyer, Dave Doucet, John Sitch, Chee Yun Lee; Robert Brimacombe; Yves Delisle; Kevin McKernan; Ben Rhody; Doug McGhan; Joseph Shapiro; Scott Warnke; Maurice O’Sullivan