OC192 VSR Interfaces Russ Tuck Ph D tuckpluris

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

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

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 • • • OC-768 • Framer interface for POS – system side Transponder interface – framer side VSR and internal interfaces Other OIF WGs: Arch, Signaling, OAM&P • Major Project: UNI 1. 0

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

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

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

Current VSR Alternatives 12 -fiber MMF ribbon, 850 nm, 1. 25 Gbs/fiber 4 -fiber MMF ribbon, 850 nm, 2. 5 Gbs/fiber 1 -fiber SMF, 1310 nm, 10 Gbs/fiber 1 -fiber MMF, 850 nm, 10 Gbs/fiber 1 -fiber MMF, 4 lambda ~850 nm, 2. 5 Gbs/lambda

12 MMF ribbon, 850 nm @ 1. 25 Gbs 2 12 -fiber ribbons (Tx, Rx) VCSEL based Gig. E speeds 300 m with 4 connectors (1 patch panel) Patch Panel VSR IF 62. 5μm core MMF, same as guaranteed for 500 m Gig. E • VSR IF 400 MHz. km modal bandwidth MTP™ (MPO) connectors

4 MMF ribbon, 850 nm @ 2. 5 Gbs 1 12 -fiber ribbon (4 fiber Tx, 4 fiber Rx, middle 4 unused) VCSEL based OC-48 (2 x Gig. E) speeds 300 m with 2 connectors (no patch panel) VSR IF 50μm core MMF, 500 MHz. km modal bandwidth MTP™ (MPO) connectors

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

1 MMF, 850 nm @ 10 Gbs 2 single fibers (Tx, Rx) Patch VCSEL based Panel VSR 10 Gbs IF Reach, with 4 connectors (1 patch panel) • 25 m • • 62. 5μm core MMF, 160 MHz. km modal bandwidth 85 m • • VSR IF 50μm core MMF, 500 MHz. km modal bandwidth 270 m • • 50μm core MMF, 2000 MHz. km modal bandwidth >300 m if eye safety regulations change as expected this year

1 MMF, 4 λ (~850 nm) @ 2. 5 Gbs 2 single fibers (Tx, Rx) VCSEL based, but different wavelengths • Optics combine and split wavelengths 2 x Gig. E speeds 300 m with 4 connectors (1 patch panel) • Uses open fiber control Patch Panel VSR IF 50μm core MMF, 500 MHz. km modal bandwidth Duplex SC connector

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

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

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

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

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

Fiber Type Required Good OK Bad No Don’t Way Care Use existing installed fiber. SMF? MMF? Serial? Ribbon (parallel)? High-BW MMF?

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

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

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

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

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