Optical Switching More than just another single point

Agenda • Optical Switching • What it is • What can it do •

The Gartner Hype Cycle VISIBILITY TIME Technology Trigger Peak of Trough of Slope of

OOO or OEO • Photonic (All Optical) Switch – The same photons that go

Electrical Optical Switch © Copyright 2006 Glimmerglass. All Rights Reserved.

OEO Benefits & Drawbacks • Benefits • Drawbacks – It’s the Status Quo –

Photonic Switch © Copyright 2006 Glimmerglass. All Rights Reserved.

OOO Benefits & Drawbacks • Benefits • Drawbacks – Protocol transparent – Price independent

OEO vs OOO… Enemies? or Friends! © Copyright 2006 Glimmerglass. All Rights Reserved.

Applications • Litmus Test – Lots of fiber – Frequent changes – Current project

Applications • • Circuit Provisioning Topology Migration Circuit Protection Physical Layer Monitoring © Copyright

Network Topology Migration • Example: Migrate from a Ring to a Star • Goal:

Network Topology Migration Edge 1 Edge 3 Core 1 PSW 1 Edge 2 10

Network Topology Migration Edge 1 Edge 2 Edge 3 Core 1 Core 2 PSW

Network Topology Migration Edge 1 Edge 3 Core 1 Core 2 PSW 1 PSW

Network Topology Migration Edge 1 Edge 3 New Core 1 Core 2 PSW 1

STM-64 Protection • Improve customer’s perception of the network • Reduce the cost impact

STM-64 Protection Traffic PSW 64 ��λ M U X Wet DWDM Tap on Tx

Network Node Management • HOPI – Hybrid Optical Packet Infrastructure – Internet 2 facility

Router Bypass with HOPI © Copyright 2006 Glimmerglass. All Rights Reserved.

HOPI Node Design © Copyright 2006 Glimmerglass. All Rights Reserved.

Something Different “Photonic Switching is a new class of tool that lets us run

Contact Information John Taylor Sales & Marketing Director Glimmerglass Europe mobile: +44 7775 840270

30% Optical Tap Go Back © Copyright 2006 Glimmerglass. All Rights Reserved.

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The Gartner Hype Cycle VISIBILITY TIME Technology Trigger Peak of Trough of Slope of Inflated Disillusionment Enlightenment Expectations © Copyright 2006 Glimmerglass. All Rights Reserved. Plateau of Productivity Source: Gartner Group

OOO or OEO • Photonic (All Optical) Switch – The same photons that go into the switch come out of the switch. • Optical Switch – Incoming light is converted to electrical signals for switching. Outputs are converted to new photons for further transmission. Optical Fabric © Copyright 2006 Glimmerglass. All Rights Reserved.

OEO Benefits & Drawbacks • Benefits • Drawbacks – It’s the Status Quo – 3 R Regeneration – Bandwidth Grooming – Statistical Multiplexing – BER Monitoring – ‘Upwardly Inflexible’ – Bandwidth Scalability – Expensive for high bitrates – Power & Heat – Latency © Copyright 2006 Glimmerglass. All Rights Reserved.

OOO Benefits & Drawbacks • Benefits • Drawbacks – Protocol transparent – Price independent of bit rate – Waveband switching – Small size – Low power consumption – Enhanced performance monitoring – Wavelength Granularity – No Grooming / Bandwidth Management – Control Plane issues – Wavelength collisions – Concatenation of multiple spans – Protocol monitoring © Copyright 2006 Glimmerglass. All Rights Reserved.

Network Topology Migration • Example: Migrate from a Ring to a Star • Goal: Introduce Flexibility to the network – Better accommodate rapid network growth • Inter-node bandwidth issues with rings • Keep high volume customers at one location • Pave the way for future growth – Minimize downtime due to fiber reconfiguration – Provide a path to roll back changes – Accommodate 10 G customers without swamping the backbone © Copyright 2006 Glimmerglass. All Rights Reserved.

STM-64 Protection • Improve customer’s perception of the network • Reduce the cost impact of unplanned outages – Reduce length of outages for failed line cards – Avoid damage to line cards during rushed replacement – Avoid the need to add staff in remote locations • Improve the quality of information available regarding network performance and availability – Enable long-term performance testing of undersea circuits – Remotely monitor network health at the physical layer without interrupting traffic © Copyright 2006 Glimmerglass. All Rights Reserved.

Network Node Management • HOPI – Hybrid Optical Packet Infrastructure – Internet 2 facility established in 2005 – New node design, integrating packet and circuit-switched infrastructures • HOPI Goals – Create different architectures at all levels of the protocol stack – Gain sufficient experience with hybrid infrastructure to understand nextgeneration architectures. © Copyright 2006 Glimmerglass. All Rights Reserved.

Something Different “Photonic Switching is a new class of tool that lets us run our exchange in ways that were not previously possible. With Glimmerglass we have increased our flexibility, availability, reliability, stability and overall performance. Knowing it exists, and what it has done for us, we would never try to run our business without this capability. ” -Job Witteman, CEO of AMS-IX BV © Copyright 2006 Glimmerglass. All Rights Reserved.

Contact Information John Taylor Sales & Marketing Director Glimmerglass Europe mobile: +44 7775 840270 office: +44 1590 642869 jmtaylor@glimmerglass. com www. glimmerglass. com © Copyright 2006 Glimmerglass. All Rights Reserved.