US SIGNAL IMPROVES TESTING, PROTECTS CUSTOMERS WITH ADVA OPTICAL NETWORKING TECHNOLOGY

Enhanced testing capabilities ensure top performance
within one of the Midwest's largest DWDM networks

Norcross, Georgia, USA and Martinsried/Munich, Germany. October 12,
2009. US Signal, the premier telecommunications infrastructure
provider of network services, IP transport, Ethernet transport, and
colocation facilities in the Midwest, has improved its network
monitoring and testing capabilities and safeguarded its customers
against potential disruptions with the implementation of ADVA Optical
Networking technology.

Deploying ADVA Optical Networking's FSP 150CC-825 and FSP 150CC-925
Ethernet demarcation devices at centralized network sites and
customer locations, US Signal has created remote test and monitoring
points within its 6,000-mile fiber optic network and metro rings in
21 markets serving customers in Illinois, Indiana, Michigan, Ohio and
Wisconsin. These test points enable the organization to conduct
internal service testing between its core network and customer
locations. That means US Signal's high-bandwidth customers are
assured to receive the secure, reliable service they depend on.

In addition, US Signal realizes operational efficiencies from its
improved monitoring capabilities through the ability to track down
and eliminate technical issues within the network before they
escalate into service outages. The FSP 150CC-825 and the
FSP 150CC-925 contain extensive remote Operations, Administration and
Maintenance (OAM) features to help minimize the need for truck rolls
and provide remote visibility into Service Level Agreement (SLA)
conformance.

The FSP 150CC-825 and the FSP 150CC-925 are unique in that they
include integrated RFC 2544 testing to verify SLA throughput, delay
and delay variation under fully loaded, worst-case conditions. This
ensures services are carrier-class.

Both devices are equipped with ADVA Optical Networking's Etherjack®
technology, enabling carriers to deploy profitable Ethernet services
by providing an intelligent Ethernet demarcation point, which
includes an 802.1ag/802.3ah-aligned Network Interface Device (NID) or
Network Termination Equipment (NTE) for OAM functionality, plus an
MEF-aligned User Network Interface (UNI) for providing advanced
services definition. The Etherjack NID includes the Etherjack
Connection Performance Analyzer (ECPA), along with port-level and
Virtual Local Area Network (VLAN)-level loopbacks to enable a carrier
to remotely diagnose faults and verify Ethernet Virtual Connection
(EVC) SLA conformance using RFC 2544 test suites. In addition,
Etherjack Service Assurance (ESA) provides in-service SLA monitoring
critical for offering carrier-class Ethernet services. The Etherjack
service UNI provides service intelligence necessary for defining
Committed Information Rate (CIR), Excess Information Rate (EIR) and
burst size of individual ports, priorities or VLANs. It uses 802.1p,
802.1q, Type of Service (ToS) or Differentiated Services Code Point
(DSCP) to classify traffic into EVCs, VLANs or priority level.

"The decision to deploy ADVA Optical Networking's FSP 150CC-825 and
FSP 150CC-925 allows our customers to connect their different sites
- utilizing diverse last mile access technologies such as OC-3, OC-12
or Native Ethernet - to their Virtual Ethernet Service," said Dan
Olrich, chief operating officer for US Signal.

The US Signal optical backbone features Dense Wavelength Division
Multiplexing (DWDM) technology that combines a redundant SONET
architecture with one of the most extensive switched Ethernet
networks in the Midwest. All of US Signal's services are delivered
over this protected network to ensure resiliency, flexibility and
scalability.

"The ability to accurately test, measure and monitor network
performance is critical to the success of today's service providers,"
said Brian Protiva, chief executive officer of ADVA Optical
Networking. "US Signal clearly takes that responsibility seriously,
and we're proud to provide the tools and technology this organization
relies on to protect its customers and its network."

# # #

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.

ABOUT US SIGNAL
The US Signal debt-free, fiber optic network is one of the largest,
fully deployed networks in the Midwest, covering Illinois, Indiana,
Michigan, Ohio and Wisconsin. With over 6,000 miles of lit fiber and
metro rings in 21 strategic tier-one, tier-two and tier-three
markets, the US Signal optical backbone features Dense Wave Division
Multiplexing (DWDM) technology and is designed with a SONET,
redundant architecture along with one of the most extensive switched
Ethernet networks in the Midwest. All of US Signal's services are
delivered over this protected network to ensure resiliency,
flexibility and scalability. Our around-the-clock surveillance also
provides additional security and confidence. US Signal's performance
guarantee ensures quality service and dependable issue resolution to
protect your profitability and vital customer relationships. For more
information, visit www.ussignalcom.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:
Brian Anderson
t +1 972 759 1205 (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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