Network IQ Training Manual Chapter 5 - Structured Cabling Standards for Fibre Systems

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Network IQ Training ManualChapter 5 - Structured
Cabling Standards for Fibre Systems
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Agenda

• Purpose of Standards
• Cabling Standards Worldwide
• Key Standards for Structured Cabling
• fibre Optic Classes
• Duplex System Polarity
• New Standards/Updates
• Summary

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Purpose of Standards (Cabling and Communication
Systems)

• Promote trade and commerce
• Set rules for an open system, open participation.
• Ratification based on voting ballot process
• Voters consist of customers, consultants,
  manufacturers
• Protect customers when buying from multiple
  manufacturers
• Ensures compatibility of components between
  vendors
• Provide guidance or recommendation for products
  to ensure consistent operation of a system

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Purpose of Standards (Cabling and Communication
Systems)

• Different components and features of a system
  must be defined
• Standards help solve the puzzle of compatibility
  problems
• However understanding the Standards can also be a
  puzzle!

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Worldwide Cabling Standards
ISO/IEC 118012002 Amd 1 Amd 2 IT Generic
Cabling for Customer Premises
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Cooperation of Standard Workgroups
Additional information listed in reference pages
on standards organization names and areas of
competence
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Structured Cabling Systems StandardsEN 50173-1,
ISO/IEC 11801
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The Need for Structured Cabling
Server Racks

• Point to point structure
• The cabling starts with a few connections and
  this is how it ends up...
• No defined cable paths
• Changes made at active equipment
• Problem determination difficult
• System growth can be impacted
• Mess under the floor

Storage
Switch Racks
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Structured Cabling Systems StandardsEN 50173-1,
ISO/IEC 11801

• Star Structure
• Each circle represents a patch panel or outlet

FD Floor Distributor TO
Telecommunications Outlet BD Building
Distributor CD Campus Distributor
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Fibre Polarity in 2-fibre ChannelsISO/IEC 11801,
TIA-568-C.0

• Corning recommends Reverse Pair Positioning
• A - B Patchcord
• Position A connector crosses to Position B
  connector
• At transceiver, Position A connects to receiver
• At transceiver, Position B connects to
  transmitter

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Fibre Polarity in 2-fibre ChannelsDuplex Jumper
Crossed and Straight
Fibres are physically straight, Optical circuit
is logically crossed - Reverse Pair
Positioning (Standard)
Fibres are physically crossed, Optical circuit
is logically straight (Non-standard)
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Fibre Polarity in 2-fibre ChannelsDuplex Jumper
Clips and Duplex Adapter
Position A
Position B
Position A
Position B
Front
Front
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Fibre Polarity in 2-fibre ChannelsReverse Pair
Positioning, ISO/IEC 11801, TIA-568-C.0

• 1st Patch panel is straight (consecutive fibre
  order)
• 2nd patch panel is reverse-pair fibre order

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Reverse Pair PositioningAlways Works, if
consistent Odd or even number of links

• Direct Connection to Transceiver
• 1 Link
• 2 Links
• 3 Links
• or 4

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Structured Cabling Systems StandardsEN 50173-1,
ISO/IEC 11801
Fibre Optic Categories
Material Optical Fibre Type Key Dimension Bandwidth (MHz km) Attenuation (dB/km) Application/ Speed/Distance
Glass OM1 62.5µm 200 _at_ 850nm 3.5 / 1.5 1 1Gbps to 1km
Glass OM2 50µm 500 _at_ 850nm 3.5 / 1.5 1 1Gbps to 750m, 10Gbps to 82m
Glass OM3 50µm 2000 _at_ 850nm 3.5 / 1.5 1 10Gbps to 300m, 100Gps to 100m
Glass OM4 50µm 4700 _at_ 850nm 3.5 / 1.5 1 10Gbps to 500m, 100Gps to 150m
Glass OS 1 9µm N/A 1.0 / - / 1.0 2
Glass OS 2 9µm (Reduced water peak _at_1383nm) N/A 0.4 / 0.4 / 0.4 2
1 Attenuation at 850 / 1300 nm 2 Attenuation
at 1310 / 1383 / 1550 nm
laser bandwidth
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Cabling Standards Component Requirements
Parameter TIA/EIA-568 ISO 11801 Amd. 2
Connector Pair Loss dB 0.75 100 lt 0.75 100 lt 0.5 95 lt 0.35 50
Splice Loss dB 0.3 0.3
Connector reflectance dB -20 (MM) -26 (SM) -20 (MM) -35 (SM)
Fibre attenuation Multimode OM3/OM4 dB/km 3.5/1.5 _at_ 850/1300nm 3.5/1.5 _at_ 850/1300nm
Fibre attenuation Single-mode OS1/OS2 dB/km lt 0.5/0.5 _at_1310/1550 nm lt 0.4/0.4/0.4 _at_1310/1383/1550 nm
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Fibre Standards Update

• OM4 Fibre Class
• Ratified in ISO/IEC 11801 and EIA/TIA 568C
• Defined as 4700MHz-km laser bandwidth, EMB
  (effective modal bandwidth)
• OFL (overfilled launch) with LED bandwidth
  defined at 3500 MHz-km
• Provides extended reach for 10Gbps VCSEL systems
  up to 500meters
• Limited extended reach for 40 and 100Gbps
  systems 150m

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40G Ethernet Parallel Optics OM3 fibre
12F MTP Interface
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100G Ethernet Parallel Optics OM3 fibre
24F MTP Interface
Source USConec
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Fibre Standards Update - 40G and 100G Ethernet

• Ratified June 2010
• Fibre Connectivity based on MTP
• Common multimode solutions based on parallel
  optics
• VCSEL sources at 850nm
• 100m max reach on OM3 150m on OM4 (max. conn.
  loss 0.5dB)
• 100GBASE-SR10
• 100G will be 2 x 10 lanes of 10Gbit/sec
• 40GBASE-SR4
• 40G will be 2 x 4 lanes of 10Gbit/sec
• Single-mode solutions based on Wave Division
  Multiplexing
• 40GBASE-LR4 (WDM) 10 km - 4? x 10G _at_1300 nm
• 100GBASE-LR4 (WDM) 10 and 40km - 4? x 25G
  _at_1300 nm
• Copper solutions only 10m
• 40GBASE-CR10 4x10Gbps on twin-axial cable
• 100GBASE-CR10 10 x 10Gbps twin-axial cable

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Fibre Standards Update

• Maximum Supported lengths for Protocols OM4 vs
  OM3

Application Max length m /Attenuation dB (with 850nm VCSEL) OM3 m / dB OM4 m /dB
1GbE 1100 / 4.1 1100 / 4.5
10GbE 300 / 2.6 400 / 2.71
40/100GbE 100 / 1.9 150 / 1.5
4GB Fibre Channel 380 / 2.88 400 / 2.95
8GB Fibre Channel 150 / 2.04 190 / 2.19
16GB Fibre Channel 100 / 1.86 125 / 1.95
OM3/4 not defined for 1G in IEEE
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Summary Cabling Standards

• Standards provide guidance for components and
  systems to ensure installed systems perform
  properly and reliably support various protocols.
• Standards ensure products from different vendors
  are compatible.
• EN 50173 (based on ISO/IEC 11801 ) is the
  European standard for structured cabling
• Some customers may follow TIA 568C in Europe, MEA
  region
• 40G and 100G ratified June 2010
• Require MTP connectivity and OM3 fibre (minimum)

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