ADVA OPTICAL NETWORKING DEMONSTRATES SERIAL 100GBIT/S TRANSMISSION FOR METRO AND REGIONAL APPLICATIONS

Successful lab tests prove viability of new modulation format that
addresses unique needs of metro and regional networks

Norcross, Georgia, USA and Martinsried/Munich, Germany. March 23,
2009. Enabling a 10-fold increase in system capacity over existing
metro DWDM (Dense Wavelength Division Multiplexing) systems utilizing
traditional techniques, ADVA Optical Networking has developed a novel
DPSK-3ASK (Differential Phase-Shift Keying, 3-level Amplitude-Shift
Keying) modulation format for serial 100Gbit/s transmission over a
single wavelength channel.

In its labs in Meiningen, Germany, ADVA Optical Networking engineers
successfully demonstrated for the first time this new modulation
scheme, which utilizes available 40Gbit/s components and facilitates
operation on a standard ITU (International Telecommunication Union)
channel grid.

Worldwide traffic demand continues to skyrocket. Operators are
striving to increase the capacity of their DWDM networks and have
been steadily migrating from 10Gbit/s to 40Gbit/s, with 100Gbit/s
being the next logical step.

Existing serial 100Gbit/s proposals such as DP-QPSK
(Dual-Polarization Quadrature Phase Shift Keying) have been optimized
for (ultra-) long haul transmission. Their complexity, cost and power
consumption make them less suitable for metro applications. Given the
substantial challenge of achieving reasonable link distances at
100Gbit/s due to chromatic dispersion and polarization mode
dispersion, most industry work on short distances to date has
centered on multi-fiber and multi-lambda approaches. Standards bodies
IEEE, ITU-T and OIF (Institute of Electrical and Electronics
Engineers, ITU-Standardization sector and Optical Internetworking
Forum) have all been working on 100Gbit/s standards, with the focus
currently placed on the two extremes of transmission distance.

"Current industry standardization efforts have left a gap between
40km and 600km, which leaves a sizeable portion of the market
unaddressed. Our solution targets exactly that sweet spot," stated
Dr. Christoph Glingener, chief technology officer (CTO) for ADVA
Optical Networking. "In addition, this solution utilizes
off-the-shelf componentry, which enables it to be implemented sooner
and with minimal industry investment, lessening the burden on optical
component companies in a difficult market environment."

ADVA Optical Networking's DPSK-3ASK solution is complementary to
existing 10- and 40Gbit/s designs and fits in existing installed
network architectures, making it easier to upgrade and operate. Its
direct detection alleviates the need for power-consuming, high-speed
digital signal processing as typically required for long-haul
schemes. It is compatible with DWDM systems like the ADVA FSP 3000,
and when coupled with optical amplification facilitates
metro/regional transmission distances up to 600km.

"Lowering the cost per bit is a common theme in both metro and
long-haul DWDM networks," continued Glingener. "We have an extremely
compact and power-efficient 40Gbit/s solution today. Now, many
network operators have asked us to address the metro challenge with a
customized 100Gbit/s solution, which is what we've done. This
DPSK-3ASK demonstration is an important milestone in the industry's
journey to realize 100Gbit/s."

This work by ADVA Optical Networking was partially funded by the
German Ministry of Education and Research (BMBF) and is part of the
CELTIC 100GET-METRO project. Get more information on ADVA Optical
Networking's participation in this project.

# # #

ABOUT ADVA OPTICAL NETWORKING
ADVA Optical Networking (FSE: ADV) is a global provider of
telecommunications equipment. With innovative Optical+Ethernet
transport solutions, we build the foundation for high-speed,
next-generation networks. Our FSP product family adds scalability and
intelligence to our customers' networks while removing complexity and
cost. With a flexible and fast-moving organization, we forge close
partnerships with our customers to meet growing demand for data,
storage, voice and video services. Thanks to reliable performance for
more than 15 years, we have become a trusted partner for more than
200 carriers and 10,000 enterprises across the globe. For more
information, please visit us at www.advaoptical.com.

PUBLISHED BY:
ADVA AG Optical Networking, Martinsried/Munich and Meiningen, Germany
ADVA Optical Networking North America, Inc., Norcross, Georgia, USA
ADVA Optical Networking (Shenzhen) Ltd., Shenzhen, China
www.advaoptical.com

FOR PRESS:
Christine Keck
t +1 201 258 8293 (U.S.)
t +44 1904 699 358 (Europe)
t +86 755 8621 7400 (Asia)
public-relations@advaoptical.com

FOR INVESTORS:
Wolfgang Guessgen
t +1 201 258 8302 (U.S.)
t +49 89 89 0665 940 (Europe)
t +86 755 8621 7400 (Asia)
investor-relations@advaoptical.com

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