Standards Activities - FIA · - ISO/IEC 11801 (or BS EN 50173-2); - ISO/IEC 24702 (or BS EN 50173-3); - ISO/IEC 24764 (or BS EN 50173-5); a launch condition to be used when undertaking

© 2012 Fibreoptic Industry Associationwww.fia-online.co.uk

The Manor House, BUNTINGFORD, Hertfordshire, SG9 9AB, United Kingdom Tel: +44 (0)1763 273039 Fax: +44 (0)1763 273255

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FIAin association with

Testing - The Final SolutionTesting - The Final Solution

Mike Gilmore

Managing Directore-Ready Building Limited

Mobile: +44 (0) 7860 110563

FIA e-mail: [email protected]

e-mail: mike.gilmore

@e-readybuilding.com

Standards Activities

MemberJTC1 SC25 WG3: Generic Cabling

Ex-convenor JTC1 SC25 WG3 CITG: Cabling Implementation Task Group

JTC1 SC25 WG3 IPTG: Industrial Premises (Cabling) Task Group

Convenor TC215 WG1: Cabling design

Secretary TC215 WG2: Cabling installation - QA and installation practices

Member TC215 WG3: Facilities and infrastructures

Past-ChairmanTCT7: Telecommunications - Installation Requirements

Chairman TCT7/-/1: Cabling: Infrastructure design, planning and commissioning

Secretary TCT7/-/2: Cabling; Installation and UK implementation

TCT7/-/3: Facilities and infrastructures

Technical and Standards DirectorFibreoptic Industry Association

FIAwww.fia-online.co.uk

DirectorTelecommunications Infrastructure Advisory Board

Leader - Special Task Force 439Global KPIs for energy efficiency of deployed broadband

www.tiab-online.co.uk

Member - CEN/CLC/ETSI CGGreen Data Centre - Coordination Group



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FIA Shortform GuidanceTesting - The Final Solution



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Further ClarificationTesting - The Final Solution

YOUR SUPPLY CONTRACT

IS THE FINAL ARBITER

If the customer has accuratelyspecified his requirements - then these

shall be applied

If not then try to apply the FIAapproach

If a “cabling system” supplier hasdefined a test solution

as a basis of some form of warranty-

and the customer accepts this-

then this solution shall be applied

Recognising that:• repeatability may be affected• the results may not map to those of astandards-based testing approach



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Standards for Attenuation TestingTesting - The Final Solution

[BS EN] IEC 61280-4-1:2009 Installed cable plant - Multimode attenuation measurement

[BS EN] IEC 61280-4-2:2000 Fibre optic cable plant - Single-mode fibre optic cable plant attenuation

Future IEC 61280-4-2:2012Installed cable plant - Single-mode attenuation and optical return loss

measurement

Fibre optic communication subsystem test procedures

ISO/IEC 14763-3 Ed.1.1:2011including Technical Corrigendum 1

Information technology - Implementation and operation of customer premisescabling - Testing of optical fibre cabling

OBJECTIVES

a single method of testing which could be applied to both adapter-to-adapter and toplug-to-plug configurations of generic cabling in accordance with the followingstandards:- ISO/IEC 11801 (or BS EN 50173-2);- ISO/IEC 24702 (or BS EN 50173-3);- ISO/IEC 24764 (or BS EN 50173-5);

a launch condition to be used when undertaking the testing of multimode opticalfibre cabling;

the appropriate use of reference grade connectors on test cords to reducemeasurement spread - together with an associated amendment of test limits.

1

2

3



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Standards Comparison

Multimode launch conditions

ISO/IEC 14763-3 [BS EN] IEC 61280-4

-1: Multimode -2: SinglemodeMultimode and

singlemode

Encircled flux

Singlemode launch conditions Not applicable

Optional OptionalMandatoryRG terminations/connectors

LSPM Normalisation (referencing)

Lin

k

1-cord reference

2-cord reference

3-cord reference

NOPreferred

(adapter-adapter)

Plug-to-plugand

adapter-adapter(where necessary)

NO

Adapter-adapteronly

Plug-to-plugonly

ONLY

Adapter-plugonly

Ch

ann

el

3-cord reference ONLY

Testing - The Final Solution



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Multimode launch conditions

ISO/IEC 14763-3 [BS EN] IEC 61280-4

-1: Multimode -2: SinglemodeMultimode and

singlemode

Encircled flux

Singlemode launch conditions Not applicable

Optional OptionalMandatoryRG terminations/connectors

LSPM Normalisation (referencing)

Lin

k

1-cord reference

2-cord reference

3-cord reference

NOPreferred

(adapter-adapter)

Plug-to-plugand

adapter-adapter(where necessary)

NO

Adapter-adapteronly

Plug-to-plugonly

ONLY

Adapter-plugonly

Ch

ann

el

3-cord reference ONLY

Standards ComparisonTesting - The Final Solution



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Why Not ISO/IEC 14763-3?Testing - The Final Solution

The FIA does not support the directapplication of ISO/IEC 14763-3 for

the following reasons:

the work of the FIA Project Team investigating the specification andprocurement of reference grade terminations found that there was nostraightforward method by which test cords with reference grade terminationscould be purchased that could be universally applied to all connector styles(this is documented in FIA-TSD-2000-4-2-3);NOTE: for example, SC connectors had few problems but LC connectors did not lendthemselves to the same approach

1

2if reference grade terminations are not universally available it is not practical,or even possible, to apply a standard that universally requires their use

3different connection combinations produce different limitsi.e RGT-RGT, RGT-normal, normal-normal



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Why Not ISO/IEC 14763-3?Testing - The Final Solution

It is not in the interest of the FIA to encourage installers or their customers to actin a way that risks the reputation of the FIA or the installer

and it is certainly not in the interests of the FIA to encourage practices that couldresult in financial penalty for any of those involved.

there is a clear and present risk for installers that tightened limits that assumethe use of reference grade terminations on the test cords will be breached if,for whatever the reason, the performance of the test cord terminations fails tomeet the specified values for reference grade terminations

1

although a single test method is very attractive, its use on typical “adapter-to-adapter” cabling configurations results in a clear and present risk of obtaining“negative” attenuation results, the probability of which is increased for veryshort links in which there is little or no cable attenuation2

while these “negative” values are entirely predictable, they are difficult tojustify to customers

MOST FIA MEMBERS ARE INVOLVED IN INSTALLATION OF CABLING WHERETHE CABLE ATTENUATION IS LOW

Short link MMF SMF

CONNECTION LOSSES DOMINATE MEASURED RESULTS



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Test Equipment Likes ISO/IEC 14763-3Testing - The Final Solution

Attenuation 0,1 dB

Attenuation 0,3 dB

RGT-normal

Normal-normal

RGT-RGT

Attenuation0,1 dB 0,3 dB 0,75 dB

Pop

ulatio

n

Attenuation 0,2 dB

Attenuation 0,5 dB

RGT-normal

Normal-normal

RGT-RGT

Attenuation0,2 dB 0,5 dB 0,75 dB

Pop

ulatio

n

MULTIMODE

SINGLEMODE

ISO/IEC 14763-3 provides simplest approach (from the test equipment perspective)

ISO/IEC 14763-3 provides limits for components, links and channels

PASS/FAIL criteria can be “programmed in”



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MMF

RGTs and LSPM: The ProsTesting - The Final Solution

Installed cable

PM

Tail cordLaunch cord

DLS S

“BASIC” ADAPTER-ADAPTER TEST CONFIGURATION

P1

A B

LIMIT/RESULT SPREADwith “reference grade”

test system components

LIMIT/RESULT SPREADwith “normal”


0.6 dB

1.5 dB

LIMIT/RESULT SPREADwith “reference grade”


LIMIT/RESULT SPREADwith “normal”


0.6 dB0.4 dB-0.2 dB

1.5 dB-1.5 dB 0 dB

Installed cable attenuation

Attenuation A-B

1-cord Referencing

3-cord Referencing



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RGTs and LSPM: The ConsTesting - The Final Solution

LSPM (MMF)

3-cord Referencing Limit1-cord Referencing Limit 0,3 + 2 x 0,75 + 0,3 + cable (dB)

(0,3-0,1) + 2 x 0,75 + (0,3-0,1) + cable (dB)

OTDR (MMF)

RGT-normal (0,3 dB max)

Normal - RGT (0,3 dB max)Normal - Normal(0,75 dB max)

MORE COMPLEX IMPLEMENTATIONS

MORE COMPLEX TEST LIMIT DEMANDS



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SummaryTesting - The Final Solution

TAKE CARE OF YOUR TEST CORDS - AND THEY WILL TAKE CARE OF YOU

Documents

Standards Activities - FIA · - ISO/IEC 11801 (or BS EN 50173-2); - ISO/IEC 24702 (or BS EN 50173-3); - ISO/IEC 24764 (or BS EN 50173-5); a launch condition to be used when undertaking