BT and Ciena Light World’s First 800G Super-Channel

  BT and Ciena Light World’s First 800G Super-Channel

  Demonstrate future-proof nature of BT’s UK core optical transport network

Business Wire

HANOVER, Md. & LONDON -- May 23, 2013

Ciena^® Corporation (NASDAQ: CIEN), the network specialist, and BT, one of the
world’s leading communications services companies, today announced a series of
pioneering trials over BT’s UK optical core network infrastructure. The
successful trials in March 2013 included the transmission of 100, 200, and
400G, as well as an ‘800G super-channel’, the last of which equates to the
simultaneous transmission of seven High Definition DVDs in a single second.
Although transmission speeds have gone even higher in a laboratory
environment, this milestone result was achieved over a deployed 410 km network
link between BT’s Adastral Park Research and Development Centre in Ipswich and
the iconic BT Tower in Central London.

Key Facts:

  *BT and Ciena demonstrated support for Terabit-rate speeds over BT’s core
    network with a series of 100, 200, 400, and 800G transmission trials using
    WaveLogic 3 transceivers - deploying both single and super-channel
    techniques. The trials were performed on a high Polarization Mode
    Dispersion (PMD) fibre link – which was unsuitable for traditional 10G
    operation – underlining the robustness of Ciena’s coherent technology and
    its ability to be deployed in any environment.
  *The trials demonstrate the future-proof nature of BT’s core network –
    based on Ciena’s 6500 Packet-Optical and 4200 Advanced Services platforms
    – which supports its entire product portfolio, including superfast
    broadband and Ethernet services.
  *For one trial, 400G of traffic was carried and monitored over the network
    using 16QAM modulation, and operated flawlessly alongside adjacent 40G and
    100G QPSK-based wavelengths, reinforcing the smooth migration path offered
    by Ciena’s coherent technology. With Wavelogic 3, BT can gradually
    increase network capacity according to the requirements of its wholesale
    and business customers while lowering costs and minimising its carbon
    footprint.

BT and Ciena partnership:

  *Ciena has been a strategic supplier to BT since 2003 and its technology is
    used in BT’s core infrastructure. The two parties entered into a
    strategic, multi-year collaboration agreement in January 2013 to jointly
    research and develop new applications and capabilities on BT’s next
    generation network.

Executive Quotes:

  *“BT has always been a pioneer in the field of networking, and we can trace
    our roots back to the very first national telecommunications undertaking
    in the world  –The Electric Telegraph Company. Since then, and with the
    recent explosion in global connectivity, we have constantly looked for new
    ways to future proof our infrastructure and provide more bandwidth for the
    next generationof applications and services. These trials prove that
    we’re heading in the right direction, and we’re very proud of our role in
    this latest milestone in the history of communications.”
    - Neil J. McRae, chief network architect at BT

  *“These high capacity transmission demonstrations illustrate the value of
    Ciena and BT’s long-standing strategic relationship. BT’s future-proof
    network will enable it to stay ahead of the competition and continue to
    offer customers cutting-edge services, while minimising its overall
    cost-base and carbon footprint. With this collaboration agreement, we can
    further deepen our relationship and work together to build
    service-enabling and highly-programmable networks, leveraging Ciena’s
    entire product portfolio to jointly develop ground-breaking services and
    applications for BT’s customers.”
    - François Locoh-Donou, senior vice president, global products at Ciena

Technology Leadership:

  *Ciena is the pioneer and market leader of coherent optical technology with
    more than 20,000 coherent 40G/100G line interfaces shipped to over 100
    customers across the globe, for a total deployment of more than 20 million
    coherent kilometers.
  *Ciena’s converged packet optical technology with WaveLogic Coherent
    Optical Processors gives service providers significant bandwidth
    scalability, reliability and network intelligence – all key building
    blocks of an OP^n network architecture.

Supporting Resources:

  *Coherent Application Note: Coherent Optical Processing for High-Capacity
    Networks
  *Video: Coherent Optical Processing
  *Data Sheet: 6500 Packet-Optical Platform
  *White Paper: OP^n Network Architecture

About BT

BT is one of the world’s leading providers of communications services and
solutions, serving customers in more than 170 countries. Its principal
activities include the provision of networked IT services globally; local,
national and international telecommunications services to its customers for
use at home, at work and on the move; broadband and internet products and
services and converged fixed/mobile products and services. BT consists
principally of four lines of business: BT Global Services, BT Retail, BT
Wholesale and Openreach.

In the year ended 31 March 2013, BT Group’s revenue was £18,017m with profit
before taxation of £2,501m.

British Telecommunications plc (BT) is a wholly-owned subsidiary of BT Group
plc and encompasses virtually all businesses and assets of the BT Group. BT
Group plc is listed on stock exchanges in London and New York.

For more information, visit www.btplc.com.

About Ciena

Ciena is the network specialist. We collaborate with customers worldwide to
unlock the strategic potential of their networks and fundamentally change the
way they perform and compete. Ciena leverages its deep expertise in packet and
optical networking and distributed software automation to delivering solutions
in alignment with OP^n, its approach for building open next-generation
networks. We enable a high-scale, programmable infrastructure that can be
controlled and adapted by network-level applications, and provide open
interfaces to coordinate computing, storage and network resources in a
unified, virtualized environment. We routinely post recent news, financial
results and other important announcements and information about Ciena on our
website. For more information, visit www.ciena.com.

Note to Ciena Investors

Forward-looking statements. This press release contains certain
forward-looking statements based on current expectations, forecasts and
assumptions that involve risks and uncertainties. These statements are based
on information available to the Company as of the date hereof; and Ciena's
actual results could differ materially from those stated or implied, due to
risks and uncertainties associated with its business, which include the risk
factors disclosed in its Report on Form 10-Q, which Ciena filed with the
Securities and Exchange Commission on March 13, 2013. Forward-looking
statements include statements regarding Ciena's expectations, beliefs,
intentions or strategies regarding the future and can be identified by
forward-looking words such as "anticipate," "believe," "could," "estimate,"
"expect," "intend," "may," "should," "will," and "would" or similar words.
Ciena assumes no obligation to update the information included in this press
release, whether as a result of new information, future events or otherwise.

Contact:

Press Contacts:
Ciena
Paula Muezerie, +44 20 7012 5640
pmuezeri@ciena.com
or
BT
Richard Knowles, +44 20 7356 5366
richard.knowles@bt.com
or
Investor Contact:
Ciena Corporation
Gregg Lampf, +1 410-694-5700
ir@ciena.com