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OC-192 VSR Interfaces

Learn about the OIF's Physical and Link Layer Working Group and their mission to develop interoperable products and services for data switching and routing using optical networking technologies. Explore the Very Short Reach (VSR) interfaces for OC-192 and other relevant alternatives.

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OC-192 VSR Interfaces

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  1. OC-192 VSR Interfaces Russ Tuck, Ph.D. tuck@pluris.com

  2. What is the OIF? • Optical Internetworking Forum • Launched in April of 1998 • Open forum: 250 members including many of the world’s leading carriers and vendors • The only industry group bringing together professionals from the packet and circuit worlds • Mission: To foster the development and deployment of interoperable products and services for data switching and routing using optical networking technologies

  3. What is the OIF PLL WG? • Physical and Link Layer Working Group • Three areas of work • Very Short Reach (VSR) interfaces for OC-192 • Internal interfaces for OC-192 and OC-48 • Framer interface for POS – system side • Transponder interface – framer side • OC-768 • VSR and internal interfaces • Other OIF WGs: Arch, Signaling, OAM&P • Major Project: UNI 1.0

  4. What is VSR? What’s an IA? • Very Short Reach SONET/SDH interface • Within a single facility or CO, < 1km • Intra-office links between routers, DWDMs, OXCs • $1000s less than SR interfaces • Implementation Agreement • Compliant implementations interoperate • OIF “standard”

  5. DWDM DWDM OXC WAN Router Core Router Access Router Host Router/switch Web Server Web Server Customers Peering partners Internet exchange Web Server Potential VSR links (in red)

  6. Requirements (will discuss more later) • Substantially lower cost than SR • 300m reach • 100m? 600m? 50m? • 1 patch panel in path • More patch panels? • Transparent OXC? • Multi-source components • Non-requirement? • Use installed fiber infrastructure

  7. Current VSR Alternatives • 12-fiber MMF ribbon, 850nm, 1.25 Gbs/fiber • 4-fiber MMF ribbon, 850nm, 2.5 Gbs/fiber • 1-fiber SMF, 1310nm, 10 Gbs/fiber • 1-fiber MMF, 850nm, 10 Gbs/fiber • 1-fiber MMF, 4 lambda ~850nm, 2.5 Gbs/lambda

  8. VSR IF VSR IF Patch Panel 12 MMF ribbon, 850nm @ 1.25 Gbs • 2 12-fiber ribbons (Tx, Rx) • VCSEL based • GigE speeds • 300m with 4 connectors (1 patch panel) • 62.5μm core MMF, same as guaranteed for 500m GigE • 400MHz.km modal bandwidth • MTP™ (MPO) connectors

  9. VSR IF VSR IF 4 MMF ribbon, 850nm @ 2.5 Gbs • 1 12-fiber ribbon (4 fiber Tx, 4 fiber Rx, middle 4 unused) • VCSEL based • OC-48 (2x GigE) speeds • 300m with 2 connectors (no patch panel) • 50μm core MMF, 500MHz.km modal bandwidth • MTP™ (MPO) connectors

  10. 1 SMF, 1310nm @ 10 Gbs/fiber • 2 single fibers (Tx, Rx) • Edge-emitting FP lasers • Eventually also VCSELs • 10Gbs • 600m – dispersion limited, 5dB loss budget • SMF • Based on ITU-T G.691

  11. VSR IF VSR IF Patch Panel 1 MMF, 850nm @ 10 Gbs • 2 single fibers (Tx, Rx) • VCSEL based • 10Gbs • Reach, with 4 connectors (1 patch panel) • 25m • 62.5μm core MMF,160MHz.km modal bandwidth • 85m • 50μm core MMF,500MHz.km modal bandwidth • 270m • 50μm core MMF,2000MHz.km modal bandwidth • >300m if eye safety regulations change as expected this year

  12. VSR IF VSR IF Patch Panel 1 MMF, 4 λ (~850nm) @ 2.5 Gbs • 2 single fibers (Tx, Rx) • VCSEL based, but different wavelengths • Optics combine and split wavelengths • 2x GigE speeds • 300m with 4 connectors (1 patch panel) • Uses open fiber control • 50μm core MMF, 500MHz.km modal bandwidth • Duplex SC connector

  13. Questions? • I’ll answer some, then I’ll ask you some.

  14. BoF Demographics • Backbone Carriers (choose one) • National ISPs • Local ISPs • Co-lo/Hosting/IXP • Equipment Vendors • Other • Using DWDM (choose all that apply) • Using OXC • Using POS • Using ATM • Using OC-192 • Using OC-48

  15. DWDM DWDM Applications • Which links will be first to use VSR? • When? • Which links will not use VSR? • Why? OXC

  16. Reach • Which is more important? • Long enough for all intra-office links • (How long is that?) • Short and cheap • (How short?)

  17. Reach • If it saves $1000/port, how long a reach does it need? • 50m • 100m • 300m • 600m • If it saves $5000/port, how long a reach does it need? • 50m • 100m • 300m • 600m

  18. Fiber Type

  19. Fiber Lifetime • Are VSR cables “patch cords” or “infrastructure”? • Why? • If “infrastructure”, how long must they be useful? • How expensive to install?

  20. Interface Longevity • How often should there be new, lower-cost links? • How much cheaper should a new interface be?

  21. DWDM DWDM OXC Loss Budget – Transparent OXC • Will you use an OXC between routers and DWDMs (in next 2 years)? • Transparent? • OEO? • All links? • If transparent: • Wavelength? • dB loss? • SMF only? • Must all VSR links support OXC? Or 2 types?

  22. VSR IF VSR IF Loss Budget – Patch Panel • How many patch panels per link? • How many connectors? Patch Panel Patch panels: 1 Connectors: 1 2 3 4 Reach:

  23. Vendor Support • How many vendors must support interoperable VSR implementations before you deploy? • 1 • 2 • 3 • 5 • 10 • 30 • Why?

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