Cabling for 10GBASE-T and Beyond

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-A Tangled Web

The impact of pre-standard products on the supply industry

Category 7A CLC TR 50173-99-1 ISO/IEC TR 24750 TIA/EIA-TSB-155 ISO/IEC 11801 A1.1 ISO/IEC 11801 A1.2 Class EA Class FA TIA/EIA-568-B.2-10 Category 6 ISO/IEC 11801

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www.it-cabling.com www.e-readybuilding.com

P. O. Box MT65, LEEDS, LS17 8YD. United Kingdom Tel: +44 (0) 113 232 3721 Fax: +44 (0) 113 293 2632

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Mike Gilmore

Mike Gilmore Managing Director

e-Ready Building

Standards Activities

Mobile: +44 (0) 7860 110563 e-mail: [email protected]

Member: JTC1 SC25 WG3: Generic Cabling Convenor: WG3 CITG: Cabling Implementation Convenor: WG3 IPTG: Industrial Premises (Cabling)

Convenor: TC215 WG1: IT Cabling Secretary: TC215 WG2

Chairman

TCT7: Telecommunications - Installation Requirements

Chairman

TCT7/-/1: Infrastructure design, planning and commissioning TCT7/-/3: Infrastructure standards - UK implementation panel

Technical and Standards Director

Fibreoptic Industry Association

FIA

www.fia-online.co.uk Director Telecommunications Infrastructure Advisory Board www.fia-online.co.uk/TIAB AUA - 9th January 2008

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Class F Category 7

Cabling Categories and Classes

ANSI TIA/EIA ISO/IEC CLC BSI Component Link/channel Category 6 Category 5e Category 3 Category 6 Category 5e Category 6 Category 5 Class E Class D Class C Class B Class A Frequency Pe rform a nc e Link/channel Component Category 3

Frequency Frequency Frequency

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Application Support

ANSI TIA/EIA

ISO/IEC CLC BSI Link/channel Category 5e Class D Link/channel 1000BASE-T Gigabit Ethernet AUA - 9th January 2008

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Customers

Famous Quotes

The cheque’s in the post

Alan Hansen You’ll win nothing with kids

Mike Gilmore Never trust an even numbered Category

Mike Gilmore There’ll never be an application that only operates over Category 6 cabling

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UCISA

Dissenting Voices

- Q1, 2006

“…. Category 6 may be a better investment than Category 5e for new-build installations. In its lifetime the cabling will probably support several generations of equipment. The capital cost is higher, but the long-term cost of ownership may well be lower than Category 5e.”

Cabling suppliers

You’ve already got Category 5 … Buy Category 6 now!

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IEEE 802.3an:2006

10GBASE-T: IEEE 802.3an

55.7.2 Link segment transmission parameters A link segment consisting of up to 100 m of Class E that meets the transmission

parameters of this subclause provides a reliable medium The transmission parameters of the link segment include • nominal impedance

• delay parameters

• insertion loss • ELFEXT

• NEXT loss (NEXT)

• MDNEXT loss (PSNEXT)

• return loss

Requirements for the alien crosstalk (AXT) coupled “between” link segments: • ISO/IEC TR-24750, TIA/EIA TSB-155, EN 50173-99-1.

extended to 500 MHz by extrapolating the formulas with appropriate adjustments for length when applicable as specified in: • ISO/IEC TR-24750;

• TIA/EIA TSB-155; • EN 50173-99-1.

extended to 500 MHz by utilizing the equations referenced in:

• ISO/IEC TR-24750; • TIA/EIA TSB-155; • EN 50173-99-1.

A link segment consisting of up to 100 m of Class F

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10GBASE-T: IEEE 802.3an

ISO/IEC TR 24750, EN 50173-99-1

Category 6 unscreened 55 m Class F ISO/IEC 11801 Class E unscreened TIA/EIA TSB-155 100 m ISO/IEC TR 24750, EN 50173-99-1 Category 6 screened Class E screened TIA/EIA TSB-155 Supported link segment distances

Cabling Cabling reference

IEEE 802.3an:2006 55.7.2 Link segment transmission parameters

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10GBASE-T Technical Reports

TIA/EIA TSB-155 Guidelines for the assessment and

mitigation of installed Category 6 cabling to support 10GBASE-T

ISO/IEC TR 24750

Information technology - Assessment and mitigation of installed balanced cabling channels in order to support IEEE802.3 10GBASE-T

CLC TR 50173-99-1 Cabling guidelines in support of IEEE802.3 10GBASE-T

Based on ISO/IEC 24750 but with improved text re-mitigation (taken from both other TRs)

BSI PD CLC TR 50173-99-1

Cabling guidelines in support of IEEE802.3 10GBASE-T

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10GBASE-T Technical Reports

TR Cabling

• intended for the validation of installed cabling

• re-verification of performance to 500MHz

• AXT failures dealt with by

• relaxed limits based on insertion loss and length • trade-offs between PSANEXT and PSAACR-F

• based on measured results for an installed channel • mitigation techniques

• NOT intended for the the specification of new material • intended for the validation of installed CHANNELS

• determination of AXT

• PSANEXT and PSAACR-F

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10GBASE-T PSANEXT

0 10 20 30 40 50 60 70 1 10 100 1000 Frequency (MHz) dB IL = 35.9 dB = ~100 m X1 = 62 dB IL = 20.3 dB = ~55 m X1 = 47 dB IL ≤ 6.3 dB X1 = 33.5 dB

Attenuation dependent parameter

4-pair “average” shall be 2.5 dB higher than limits shown

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10GBASE-T PSAELFEXT

0 10 20 30 40 50 60 70 1 10 100 1000 Frequency (MHz) dB

Attenuation and length dependent parameter

IL = 35.9 dB = ~100 m X2 = 37.9 dB IL = 20.3 dB = ~55 m X2 = 33.7 dB IL ≤ 10 dB X2 = 32.5 dB

4-pair “average” shall be 4 dB higher than limits shown

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• the number of connections involving connecting hardware with high coupling;

Mitigation Techniques

• including screened connectors that are not individually screened; • screened connecting hardware with poor transfer impedance;

• the performance, length and dressing of “equipment” cords.

PROCESSES TO IMPROVE SPECIFIC ANEXT FAILURES SOURCES OF SPECIFIC ANEXT FAILURES

• as above plus

• the performance, length and dressing of the entire channel; • the mixture of short and long channels.

SOURCES OF SPECIFIC AACR-F FAILURES

PROCESSES TO IMPROVE SPECIFIC AACR-F FAILURES Reduce the number of connections in the channel

Unbundle and randomise cords

Unbundle and randomise the installed cables at appropriate ends Utilise cords sufficiently specified to mitigate the AXT coupling Increase separation distance between interfaces at each location

Utilise longer cords (within channel limits)

Increase the distance between cords at each location

As above plus

Segregate long and short channels

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Class E Channel

0 10 20 30 40 50 60 70 1 10 100 1000 Frequency (MHz) dB

Class E Chnl RL Class E Chnl lL Class E Chnl NEXT Class E Chnl PSNEXT Class E Chnl ELFEXT Class E Chnl PSELFEXT

NEXT, PSNEXT informative for IL < 4.0 dB

RL informative for IL < 3.0 dB

ACR (i.e. NEXT- IL), PSACR normative

DC loop resistance Resistance unbalance

Parameters not shown

ACR PSACR Operating voltage Unbalance attenuation Current capacity Coupling attenuation Power capacity1 Delay 544+36/√f ns (max) AUA - 9th January 2008

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10GBASE-T Cabling

0 10 20 30 40 50 60 70 1 10 100 1000 Frequency (MHz) dB 10GBASE-T Chnl RL 10GBASE-T Chnl lL 10GBASE-T Chnl NEXT 10GBASE-T Chnl PSNEXT 10GBASE-T Chnl ELFEXT 10GBASE-T Chnl PSELFEXT

Delay (2-500 MHz) Delay skew (all f)

580 ns 50 ns (max)

PSANEXT PSAELFEXT

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Class F Channel

0 10 20 30 40 50 60 70 1 10 100 1000 Frequency (MHz) dB

Class F Chnl RL Class F Chnl lL Class F Chnl NEXT Class F Chnl PSNEXT Class F Chnl ELFEXT Class F Chnl PSELFEXT

RL informative for IL < 3.0 dB

NEXT, PSNEXT informative for IL < 4.0 dB ACR (i.e. NEXT- IL), PSACR normative

DC loop resistance Resistance unbalance

ACR PSACR Operating voltage Unbalance attenuation Current capacity Coupling attenuation Power capacity1 Delay 544+36/√f ns (max) AUA - 9th January 2008

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Category 7_A Class F_A Class F Category 7

Aug. Cat. 6

Aug. Cat. 6 Category 6_A Class E_A

The Hierarchical Principle

ANSI TIA/EIA ISO/IEC CLC BSI Component Link/channel Link/channel Component Frequency Pe rform a nc e Category 6 Category 5e Category 3 Category 6 Category 5e Category 6 Category 5 Class E Class D Class C Class B Class A Category 3

Frequency Frequency Frequency

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New Performance Standards

ANSI TIA/EIA

Addendum 10

Transmission performance specifications for 4-pair 100 ΩΩΩΩ Augmented Category 6 cabling ISO/IEC 11801 Ed.2

Class E_A and Class F_A channels Information technology:

Generic cabling for customer premises A1.1

-568-B Commercial Building

Telecommunications Cabling Standard -568-B.2 Balanced Cabling

ISO/IEC 11801 Ed.2 Information technology:

Generic cabling for customer premises

A1.2

Class E_A and Class F_A links

Category 6_A and Category 7_A components Amendments to component Cats 5, 6 and 7 Amendments to channel Classes D, E and F

Amendments to link Classes D, E and F

Deadline: 02/08

~ 12/08

Deadline: Q1, 08

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CHANNELS

Comparisons

Class E_A is more stringent than Augmented Category 6

NEXT ACR-F PSNEXT

CABLES

Augmented Category 6 = Category 6_A

CONNECTIONS

PERMANENT LINKS

NEXT PSACR-F

PSNEXT PSAACR-F

NEXT PSNEXT

Augmented Category 6 is more stringent than Class EA

RL AUA - 9th January 2008

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ISO/IEC

Cable Constructions

11801: 2002 CLC TR 50173-1: 2008 A.1 X X / X X X ACRONYM U/UTP F/UTP S/FTP U/FTP SF/UTP Typical CA: Type I

Typical CA: Type II

Typical CA: Type III

Typical CA: Type II

Typical CA: Type III OVERALL SCREEN

F = Foil screened S = Braid screened SF = Braid and foil screened

CABLE ELEMENT TP = Twisted pair Q = Quad ELEMENT SCREEN U = Unscreened F = Foil screened U = Unscreened AUA - 9th January 2008

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AUA - 9th January 2008

Conclusions

Mike Gilmore Never trust an even numbered Category

Mike Gilmore There’ll never be an application that only operates over Category 6 cabling

UCISA - Q1, 2006

“…. Category 6 may be a better investment than Category 5e for new-build installations. In its lifetime the cabling will probably support several generations of equipment. The capital cost is higher, but the long-term cost of ownership may well be lower than Category 5e.”

Cabling suppliers

You’ve already got Category 6 … Buy Augmented Category 6/Category 6_A now!

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The End

Category 7A CLC TR 50173-99-1 ISO/IEC TR 24750 TIA/EIA-TSB-155 ISO/IEC 11801 A1.1 ISO/IEC 11801 A1.2 Class EA Class FA Category 6A TIA/EIA-568-B.2-10 Augmented Category 6 ISO/IEC 11801 AUA - 9th January 2008