© 2015 Xtera Communications, Inc. Proprietary & Confidential 1

Massimo Leo – Director Technical Sales EMEA & Sales Europe – Xtera Communications

26 March 2015

TransNet 2015 (Moscow, Russia)

Maximizing Capacity Over Long-Distance Optical Networks Over Land, Under Water

© 2015 Xtera Communications, Inc. Proprietary & Confidential 2

A History of Innovation and Leadership

First and only to deploy 100nm

with SD-FEC in Terrestrial Networks (2011) and in Submarine Networks (2012)

First to deploy advanced 100G

240 x 10G channels (2004) using Raman technology

Both “active” and “passive” Line Monitoring for subsea repeaters (2007)

First to upgrade SLTE systems

World first wideband repeater

55nm / 130+ channels (2015) using Raman technology

World record 150 x 100Gb/s Unrepeatered over 410 km (2014)

World record unrepeatered capacity

© 2015 Xtera Communications, Inc. Proprietary & Confidential 3

Maximizing Capacity AND Reach

More symbols per second

Better SD-FEC (coding gain)

More bits per symbol

I

Q

1101

1100

1110

1111

1001

1000

1010

1011

0001

0000

0010

0011

0101

0001

0110

0111

Multiple carriers

More Spectral Efficiency (b/s/Hz)

Raman Photonics • More Bandwidth (up to 100nm) • More Reach

• Less noise • Less nonlinear effects

More Spectrum & Reach (nm & Km)

Higher Speed Silicon 100G, 400G & beyond

© 2015 Xtera Communications, Inc. Proprietary & Confidential 4

More Capacity in Long Haul applications for 100G, 400G and Beyond

Mastering Raman Amplification

Spectrum/ Capacity

Reach

3

2

240 channels

150 channels

80 channels

Up to 6 Times Better Tbps x Km

© 2015 Xtera Communications, Inc. Proprietary & Confidential 5

Raman control fully integrated, from

ground up

Unique, full in-house design and patented control algorithms

EDFA, EDFA/Raman, Raman

Unique Expertise

Largest Raman IP base since 1998: operations,

safety, design

Most advanced global engineering team

Seamless, Safe Applicability

Seamless & safe operations, no manual

intervention

Any aged fiber plant with standard

connectors

Xtera’s Wise RamanTM

Xtera’s Raman – Highest Optical Performance, Simple to Operate

Adding third-party Raman pump

modules to an existing EDFA DWDM control system cannot not

provide performance and efficiency

© 2015 Xtera Communications, Inc. Proprietary & Confidential 6

Wise RamanTM World Records – Unrepeatered Transmission

100G Unrepeatered Transmission across 100dB Loss Fiber

© 2015 Xtera Communications, Inc. Proprietary & Confidential 7

Wise RamanTM [Capacity – Reach] Metric in Terrestrial Networks

240 x 100G • 100nm spectrum • 50GHz channel spacing • 2 bit/s/Hz spectral efficiency

120 x 400G • 100nm spectrum • 16QAM 200G carriers

spaced 50 GHz apart • 4 bit/s/Hz spectral efficiency

160 x 400G • 100nm spectrum • 16QAM 200G carriers

spaced 37.5 GHz apart • 5.3 bit/s/Hz spectral efficiency

16QAM on more than 2,000 km of aged fiber (0.28 dB/km)

© 2015 Xtera Communications, Inc. Proprietary & Confidential 8

Wise RamanTM [Capacity – Reach] Metric in Terrestrial Networks

© 2015 Xtera Communications, Inc. Proprietary & Confidential 9

Raman Optical Repeater for Subsea Cable Systems

Innovation: Mechanical Marine grade titanium. Compact, light and strong.

Electrical Improved powering enabling Raman amplification.

Optical Modular optical design. Optical bandwidth increased by 50%.

Manufacturability Flexible and simplified manufacturing process.

Xtera repeater deployment

© 2015 Xtera Communications, Inc. Proprietary & Confidential 10

Ultra-Long Spans in 2,266 km OPGW (Amazonas) (Highest Span Loss: 63 dB)

ROADM

43 km

13.9 dB

237 km

53.8 dB

278 km 63.1 dB

ILA ILA ROADM

142 km

34.6 dB

ILA

138 km

33.1 dB

235 km

53.5 dB

ILA Villa

Camburão

ROADM

183 km

46.1 dB

141 km

33.9 dB

157 km

37.2 dB

ILA ILA ILA

91 km

23.8 dB

ILA

229 km

52.8 dB

ROADM

239 km

54.2 dB

110 km

27.2 dB

ROADM

ILA ILA

43 km

13.9 dB

Manaus TIM

Terra Santa Manaus Rod Lexuga

Silves Oriximiná

Macapá TIM

Jurupari

Macapá Sub Laranjal do Jari

Gopa Xingu Tucuruí Pacaja Vitória do Xingu

Core amplifier

Backward span extension module

Forward span extension module

G.652 fiber span

© 2015 Xtera Communications, Inc. Proprietary & Confidential 11

• OSNR requirements mandate Raman amplification for 100G/100G+ in long-haul applications

• Wise RamanTM minimizes the number of ILAs and regeneration sites over long optical data paths.

Wise RamanTM Benefits for Backbone Networks in Russia

Channel rate M

inim

um

required

OSN

R

10G 100G 200G

EDFA design

Raman design

More Capacity, More Distance Less Cost/Bit

© 2015 Xtera Communications, Inc. Proprietary & Confidential 12

Innovative Supplier Of Long-Haul Optical

Transmission Infrastructure

Aerial

Terrestrial

Submarine