Work at OIF on Interfaces for Optical Modules including Very Short Reach VSR and Electrical Interfac

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Work at OIF on Interfaces for Optical Modules
including Very Short Reach (VSR) and Electrical
Interfaces

• Raj Savara
• Network Elements Inc.

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Why VSR Interfaces?

• Explosive growth in the demand for bandwidth is
  fuelling the development of optical networks
• Optical Networking has increased the number of NE
  in a carriers central office and the related NE
  NE interconnecting Cost
• OIF recognized this and started a project on
  lowering the cost of these very short reach
  interfaces (lt2Km)
• OIF has announced 4 VSR Implementation Agreements
  to address Low cost intra office interconnect
  applications

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Very Short Reach (VSR) interfaces

• Standard SONET frame format
• Promotes multiple vendors
• Promotes interoperability

• Reach 2m to 2km
• Multiple client signals
• Low cost

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VSR Reference Application Models
Reference Application 2 2m to 300m, with 0-2
patch panels
Reference Application 1 2m to between 50m and
100m direct connection
Reference Application 3 2m to 600m, with 0-2
patch panels
Reference Application 4 2m to 600m, one PXC,
and 0-4 junction boxes
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Interface Definition for VSR-1 Implementation
Agreement (IA)

• VSR-1 12 Fiber optical Link running at
  1.25Gb/s between two Network Elements.
• 10 fibers carry the data
• 1 carries CRC error correction information
• 1 fiber carries parity of the 10 data fibers
• This enables hitless correction of errors on any
  single fiber, including the loss of a fiber.
• Fiber Type 400KHz, MM Fiber
• Reach 300m
• Laser 850nmVCSEL
• Field termination is supported
• link electronics automatically compensate for
  ribbon orientation.

VSR-1 Satisfies Reference Application Model 1 and
2
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Interface Definition for VSR-2/5 IA

• VSR-2/5 1310 nm serial OC-192 SMF VSR optical
  link between two network elements.
• 1 Single Mode Fiber
• Based on G.693, ITU Specifications
• Fiber Type G.652, SM Fiber
• Reach 600m
• Link budget 6dB VSR-2, 11dB VSR-5
• Laser un-cooled 1310nm , FP
• Field termination is supported

VSR-2/5 Satisfies Reference Application Model 1
,2 and 3
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Interface Definition for VSR- 3 IA

• VSR-3 4 Fiber optical Link running at
  1.25Gb/s between two Network Elements.
• 4 fibers each carry the 2,5Gb/s data
• Fiber Type 500KHz, MM Fiber
• Reach 600m
• Laser 850nmVCSEL
• Field termination is supported

VSR-3 Satisfies Reference Application Model 1 and
2
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Interface Definition for VSR-4 IA
VSR-4 850 nm serial SMF VSR optical link (VSR-4)
between two network elements. 1 Multi Mode
Fiber Reach 85m using 500MHz.km 50 mm fiber,
300m using 2000 MHz.km 50 mm fiber Laser 850nm
VCSEL Field termination is supported
VSR-4 Satisfies Reference Application Model 1
and 2
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Why SFI Interfaces?

• Explosive growth of 10Gb/s systems required a
  common interface to connect stream data from Chip
  to Chip, and Chip to Modules.
• SFI-4 SerDes Framer Interface is used for SONET,
  Forward Error Correction, and IEEE802.3ae (XSBI).
• SFI-4 phase 2 is a 4 lane interface with 64/66
  encoding. Each lane does not require any clock,
  or alignment to adjacent lanes.
• CEI is a 10Gbps serial interface in development
  at OIF.
• Two speeds 10Gbps and 6Gbps.
• Lower speed for Fibre channel and backplanes.
• Higher speeds for XFI interfaces and backplanes.
• Two Distances for XFI and backplane applications.

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OIF Electrical Interfaces

• This interface is Demonstrated here at the OIF
  booth.
• FEC chips also use SFI4 phase 1. This would be a
  block between the Framer and the 300 pin MSA
  module.

Network Elements 300pin MSA transponder
Framer or PHY MAC
SFI-4 Phase 1
SPI-4 Phase 1/2
VSR-2/5
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OIF Electrical Interfaces

• SFI4 Phase 1
• 16 bit LVDS with clock bi-directional
• Used on all 300 pin MSA modules
• Used on 200 pin MSA modules
• See live demo of modules with this interface at
  SFI4 demo table.

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OIF Electrical Interfaces

• SFI4 Phase 2
• 4 lane self clocking with de-skew, 64/66
  encoding, and bi-directional.
• Used for XenPak, X2, XPAK modules with 70 pin
  connectors.

XENPAK 6.7 in2 / 4400 mm2 1.4 x
4.8 x 0.7 in 36 x 121 x 17mm
X2 5.2 in2 / 3400 mm2 1.4 x 3.7 x 0.5
in 36 x 95 x 11mm
XPAK 4.3 in2 / 2800 mm2 1.4 x 3.1 x
0.4 in 36 x 79 x 10mm
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OIF Electrical Interfaces

• CEI 10Gbps serial interface (In work at OIF)
• Single lane interface for Framer, backplane
  interconnect, self clocking, and bi-directional.
• Used on all XFP modules with 30 pin connectors.
• Capable of 1m and two connectors over FR4 for
  backplane applications.

XFP 2.1 in2 / 1400 mm2 0.7 x 3.0 x 0.3
in 18 x 78 x 9 mm
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NEI Modules using OIF interfaces
X2 5.2 in2 / 3400 mm2 1.4 x 3.7 x 0.5
in 36 x 95 x 11mm
XENPAK 6.7 in2 / 4400 mm2 1.4 x
4.8 x 0.7 in 36 x 121 x 17mm
MSA300 6.6 in2 / 4100 mm2 2.2 x
3.0 x 0.5 in 56 x 74 x 14 mm
XPAK 4.3 in2 / 2800 mm2 1.4 x 3.1 x
0.4 in 36 x 79 x 10mm
XFP 2.1 in2 / 1400 mm2 0.7 x 3.0 x 0.3
in 18 x 78 x 9 mm
MSA200 5.1 in2 / 3200 mm2
1.7 x 3.0 x 0.6 in 42 x 75 x 16
mm
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OIF Interfaces for Modules

• OIF creates high speed electrical interfaces for
  true interoperability between component
  suppliers.
• OIFs Live demonstration proves Implementation
  agreements WORK!
• OIF is paving the way for next generation
  interfaces such as CEI.