Transcript Kein Folientitel

Network IQ Training Manual
Chapter 5 - Structured Cabling Standards for Fibre Systems
Agenda
• Purpose of Standards
• Cabling Standards Worldwide
• Key Standards for Structured Cabling
• fibre Optic Classes
• Duplex System Polarity
• New Standards/Updates
• Summary
Optical Fibre
Network IQ Training Manual
2
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
Optical Fibre
Network IQ Training Manual
3
Purpose of Standards
(Cabling and Communication Systems)
Transmission
Protocol
Cable
• Different components and features of a system must be defined
• Standards help solve the puzzle of compatibility problems
Testing
Connector
Mating
Fire
Resistance
• However understanding the Standards can also be a puzzle!
Optical Fibre
Network IQ Training Manual
4
Worldwide Cabling Standards
ISO/IEC 11801:2002
+ Amd 1 + Amd 2
ANSI/TIA/EIA-568-C.1
IT Generic Cabling for Customer Premises
Commercial Building
Telecommunications Wiring
Standard
ANSI/TIA/EIA-568-C.2
Balanced Twisted Pair Cabling
ANSI/TIA/EIA-568-C.3
Optical Fibre Cabling
EN50173-1:2003
Performance Requirements Of
Generic Cabling Systems
Optical Fibre
Network IQ Training Manual
5
Cooperation of Standard Workgroups
Region
Standards for Structured Cabling
Standards for Active
Electronics
International
ISO/IEC 11801
Hemisphere/
Continent
EN50173-1
TIA/EIA-568.B
Active equipment
requirements from IEEE
incorporated in structured
cabling standards
Country
e.g., Deutsche Kommission Elektrotechnik
British Standards
Additional information listed in reference pages on standards organization names and areas of competence
Optical Fibre
Network IQ Training Manual
6
Structured Cabling Systems Standards
EN 50173-1, ISO/IEC 11801
Horizontal cabling system –
with copper - up to 100 m; incl.
patch cords
Total channel length max.
2000m for fibre only cabling
Optical Fibre
Building backbone cabling system
- fibre up to 500 m
Campus backbone cabling
system - fibre only up to 1500 m
Network IQ Training Manual
7
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
Optical Fibre
Network IQ Training Manual
8
Structured Cabling Systems Standards
EN 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
Optical Fibre
Network IQ Training Manual
9
Fibre Polarity in 2-fibre Channels
ISO/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
Optical Fibre
Network IQ Training Manual
10
Fibre Polarity in 2-fibre Channels
Duplex 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)
Optical Fibre
Network IQ Training Manual
11
Fibre Polarity in 2-fibre Channels
Duplex Jumper Clips and Duplex Adapter
Position A
Position B
Position A
Position B
Front
Front
Optical Fibre
Network IQ Training Manual
12
Fibre Polarity in 2-fibre Channels
Reverse 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
Optical Fibre
Network IQ Training Manual
13
Structured Cabling Systems Standards
EN 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 @ 850nm
3.5 / 1.5 1
1Gbps to 1km
Glass
OM2
50µm
500 @ 850nm
3.5 / 1.5 1
1Gbps to 750m,
10Gbps to 82m
Glass
OM3
50µm
2000** @ 850nm
3.5 / 1.5 1
10Gbps to 300m,
100Gps to 100m
Glass
OM4
50µm
4700** @ 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
N/A
0.4 / 0.4 / 0.4 2
(Reduced water peak
@1383nm)
1
2
Attenuation at 850 / 1300 nm
Attenuation at 1310 / 1383 / 1550 nm
Optical Fibre
** laser bandwidth
Network IQ Training Manual
15
Cabling Standards – Component Requirements
Parameter
Connector Pair Loss [dB]
TIA/EIA-568
≤ 0.75 100%
ISO 11801 Amd. 2
< 0.75
< 0.5
< 0.35
100%
95%
50%
≤ 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
≤ 3.5/1.5
@ 850/1300nm
@ 850/1300nm
< 0.5/0.5
< 0.4/0.4/0.4
@1310/1550 nm
@1310/1383/1550 nm
Splice Loss [dB]
Fibre attenuation
Single-mode OS1/OS2
[dB/km]
Optical Fibre
Network IQ Training Manual
16
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
Optical Fibre
Network IQ Training Manual
17
40G Ethernet Parallel Optics: OM3 fibre
12F MTP
Interface
Optical Fibre
Network IQ Training Manual
18
100G Ethernet Parallel Optics: OM3 fibre
24F MTP
Interface
Source: USConec
Optical Fibre
Network IQ Training Manual
19
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 - 4λ x 10G @1300 nm
– 100GBASE-LR4 (WDM): 10 and 40km - 4λ x 25G @1300 nm
• Copper solutions only 10m
– 40GBASE-CR10: 4x10Gbps on twin-axial cable
– 100GBASE-CR10: 10 x 10Gbps twin-axial cable
Optical Fibre
Network IQ Training Manual
20
Fibre Standards Update
• Maximum Supported lengths for Protocols: OM4 vs OM3
Application
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
Max length [m] /Attenuation [dB]
(with 850nm VCSEL)
* OM3/4 not defined for 1G in IEEE
Optical Fibre
Network IQ Training Manual
21
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)
Optical Fibre
Network IQ Training Manual
22