JOHANNESBURG DEVELOPMENT AGENCY (JDA) Contract No. JDA-WP 15N-02 Part T1: Technical Specification ANNEXURES – TECHNICAL SPECIFICATIONS TURNKEY IMPLEMENTATION OF THE ITS REDUNDANCY LOOP REA VAYA BUS RAPID TRANSPORT SYSTEM PHASE 1C PLANNING, DESIGN, BUILDING, MONITORING AND INFRASTRUCTURE SECURITY OF THE OPTICAL FIBRE NETWORK WORK PACKAGE: 15N City of Johannesburg Johannesburg Development Agency No 3 President Street The Bus Factory Newtown Johannesburg, 2000 PO Box 61877 Tel +27(0) 11 688 7851 (O) Marshalltown Fax +27(0) 11 688 7899/63 2107 e-mail: [email protected]www.jda.org.za www.joburg.org.za
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JOHANNESBURG DEVELOPMENT AGENCY (JDA) Contract No. JDA-WP 15N-02 Part T1: Technical Specification
ANNEXURES – TECHNICAL SPECIFICATIONS
TURNKEY IMPLEMENTATION OF THE ITS REDUNDANCY LOOP
REA VAYA BUS RAPID TRANSPORT SYSTEM
PHASE 1C
PLANNING, DESIGN, BUILDING, MONITORING AND INFRASTRUCTURE
SECURITY OF THE OPTICAL FIBRE NETWORK
WORK PACKAGE: 15N
City of Johannesburg Johannesburg Development Agency
No 3 President Street The Bus Factory Newtown Johannesburg, 2000
PO Box 61877 Tel +27(0) 11 688 7851 (O) Marshalltown Fax +27(0) 11 688 7899/63 2107 e-mail: [email protected]
JOHANNESBURG DEVELOPMENT AGENCY (JDA) Contract No. JDA-WP 15N-02 Part T1: Technical Specification
JOHANNESBURG DEVELOPMENT AGENCY (JDA) TURNKEY IMPLEMENTATION OF THE ITS REDUNDANCY LOOP
REA VAYA BUS RAPID TRANSPORT SYSTEM PHASE 1C
PLANNING, DESIGN, BUILDING, MONITORING AND INFRASTRUCTURE
SECURITY OF THE OPTICAL FIBRE NETWORK WORK PACKAGE: 15N
CONTRACT No: JDA-WP 15N-02
Contents
A. 110mm HDPE Sleeves and Warning Tape ......................................... 3 B. 7 way (12/10) micro duct ..................................................................... 4 C. Splice Closures ................................................................................... 7 D. Post Installation Duct Integrity Test (DIT) procedure ....................... 8 E. Optical Fibre Cable Drum Handling and Pre-Installation
Test Procedure .................................................................................. 19 F. Optical Fibre Cable Post-Installation Test Procedure ..................... 27 G. Optical Fibre Conformance Test Procedure .................................... 32 H. 72 core G652.D cable to be installed in 12/10 micro duct :
Technical Specifications for Micro Duct Optical Fibre Cables ....... 42
JOHANNESBURG DEVELOPMENT AGENCY (JDA) Contract No. JDA-WP 15N-02 Part T1: Technical Specification
A. 110mm HDPE Sleeves and Warning Tape
1. 110mm HDPE sleeves
110mm sleeves shall be manufactured from HDPE material manufactured to SANS IEC
61386-24:2005 (Type N 450) “Conduit systems for cable management Part 24: Particular
requirements – Conduit systems buried underground”.
Double wall corrugated construction provides high ring stiffness.
Smooth bore ensures easy draw-in of cables.
The pipes shall carry the SABS certification mark in respect of specification.
Push fit couplings shall include rubber sealing ring.
2. Warning tape
Warning tape shall be installed during the backfill process. The warning tape shall be
installed a minimum of 300mm above the ducts. The warning tape shall be of yellow colour
and 150mm wide x 200 micron thick. The warning tape shall have the following wording in
thick black lettering:
“WARNING FIBRE OPTIC CABLE – PHONE JDA (“number to be confirmed”)”
3
JOHANNESBURG DEVELOPMENT AGENCY (JDA) Contract No. JDA-WP 15N-02 Part T1: Technical Specification
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B. 7 way (12/10) micro duct[GS1]
1. General
The following ducts shall be supplied:
7-way duct consisting of 7 x 12/10 mm HDPE micro duct with a minimum 2mm thick
HDPE outer jacket to renderer the duct suitable for direct burial;
End caps for the respective size ducts and micro ducts;
Ducts to be supplied on steel reels (preferred) or on wooden drums. Should ducts be
supplied on wooden drums then all the ducts and sub-ducts shall be tested in factory
and on delivery for deformation by blowing a ball bearing of 85% of the internal
diameter of the duct.
The minimum length of any duct type ordered will depend on the proven manufacture
capacity of the Manufacturer.
2. Material properties
The duct and micro duct must have the following material characteristics:
I hereby confirm that the optical fibre cable has been received by me in good working order.
Site Engineer / Subcontractor
Name Signature Date
Witnessed / Accepted by
Name Signature Date
JOHANNESBURG DEVELOPMENT AGENCY (JDA) Contract No. JDA-WP 15N-02 Part T1: Technical Specification
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F. Optical Fibre Cable Post-Installation Test Procedure
1. INTRODUCTION
Scope
This document describes the test procedure that must be performed on all optic fibre cables
after installation and prior to splicing.
The document will also refer to safety aspects specifically pertaining to optic fibre cable
handling.
Although there are various cable types and sizes available and a wide range of optic fibre test
equipment, this document will describe the processes in a generalised manner so that it can
easily be adapted to meet the various configurations.
Order of Description
Purpose;
Test Procedure; and
Safety.
2. PURPOSE
All fibre strands in all optic fibre cables delivered on site should be inspected and tested by
the installer/contractor, on the drum, prior to installation. This is to ensure that the cable was
sound and all of the fibres faultless prior to the cable installation process.
This post installation test is to ensure and confirm that no damage was done to the cable
during the installation activity. The test will confirm the length of the installed cable, the
continuity of all fibres, and the attenuation loss of all of the fibres.
3. FIBRE STRAND TEST PROCEDURE
The following important notes must be kept in mind when arranging the time for the post
installation tests to be done:
The tests must be scheduled as close as possible after the cable installation date.
The Project Owner representative must be advised at least 48 hours in advance of when the
testing will take place.
Carefully unwind the cable slack from the manhole and take the cable end to the area where
the fibre testing will take place. This is usually in a sheltered area or in a vehicle.
Ensure that enough slack was left in the manhole for the required slack coil and the joint to be
made. (15N-02 slack + 2m for jointing + 1m for post installation testing)
Cut and remove 1 meter of the cable sheath with a cable slitter.
Tape the butt-end of the cable with PVC tape for a distance of 10mm to support the loose
tubes.
Remove the cellophane wrappings and all filling and protection material up to the butt-end of
the cable.
JOHANNESBURG DEVELOPMENT AGENCY (JDA) Contract No. JDA-WP 15N-02 Part T1: Technical Specification
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Clean the loose tubes with isopropyl alcohol to remove the petroleum jelly.
Cut the first tube to be tested with a tube cutter. Care must be taken not to cut through the
tube into the fibres. Remove the cut tube by pulling it forward to the end of the fibres.
Clean the exposed fibres with pre-packed cleaning tissues.
Position and switch on the OTDR.
Set the OTDR to the 1550nm setting.
Connect a test lead to the OTDR and prepare the other end to be spliced to the first fibre to be
tested. This entails stripping the primary coating from the fibre and then cleaning the fibre with
isopropyl alcohol and a lint free cloth.
Cleave the fibre to be tested and the test lead and complete the first splice. If a splicing
machine is not available a mechanical splice can be used to connect the test lead of the
OTDR to the fibres to be tested.
Ensure that the far end of the cable is insulated and protected.
Perform the OTDR test of the fibre and save the results under an appropriate label on the
OTDR.
Now repeat this process for all the fibre strands in the cable. (See Annexure A for the cable
colour coding and strand numbering schedule)
A soft copy of the test results from the OTDR must be made available to the Project Owner
representative.
The test results must also be recorded on a Pre-Installation Record form. (See Annexure B)
The maximum allowable attenuation loss is 0,25dB. per Km and any readings greater than this
must be regarded as a failure in the fibre.
In addition to the cable loss, fibres with any points or steps of discontinuity, referred to as
events, greater than 0,04dB shall be regarded as a failed fibre.
On completion of the above tests the cable must be resealed and rewound and secured on the
cable supports inside the manhole.
4. SAFETY
In addition to the standard safety procedures there are additional precautions to be taken
when working with optical fibre cables that are extremely important to adhere to. All staff
working or assisting with any form of optical fibre activities must be sensitized in this regard.
Laser Precaution
Laser beams used in optical communication are invisible and can seriously damage the eyes.
Viewing it directly does not cause any pain and the iris of the eye does not close automatically
as it does whilst viewing bright light. This can cause serious damage to the retina of the eye.
Therefore,
Never look into a fibre that has a laser coupled to it; and
If your eyes have accidentally been exposed to a laser beam, immediately seek medical
assistance.
JOHANNESBURG DEVELOPMENT AGENCY (JDA) Contract No. JDA-WP 15N-02 Part T1: Technical Specification
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Optical fibre Handling Precaution
Broken ends of fibres created during termination and splicing are extremely sharp and
dangerous and can easily penetrate the skin. They invariably break off and due to being
transparent and very thin it is extremely difficult to see and remove these pieces once they
have penetrated a person’s skin. A delay in removing these pieces could lead to infection.
Hence,
Be careful whilst handling fibres;
Avoid the penetration of these pieces into your skin;
Do not drop pieces on the floor where they will stick to your shoes and be carried
elsewhere;
Pieces of fibre that has dropped to the floor can be picked up with a tweezers or with sticky
tape;
Dispose of off cut pieces of fibre by placing them in a sealable container; and
Do not eat or drink near the installation area where fibres are being handled.
Material Handling
Fibre optic splicing and termination processes require various chemical cleaners and
adhesives. The safety instructions defined for these substances must be followed. When
working with these materials remember the following instructions:
Always work in well ventilated areas;
Avoid skin contact with the materials as much as possible;
Avoid using materials that causes allergic reactions; and
Even simple items such as isopropyl alcohol used as a cleaner, is flammable and should be
handled carefully.
Safety Summary
Keep all food and beverages out of the work area to avoid fibre particles being ingested.
Wear safety glasses with side shields and handle the fibre optic splinters similarly to glass
splinters.
Never look directly through the end of fibres or connectors till you ensure there is no light
source on the fibres at the other end.
Only work in well ventilated areas.
Do not touch your eyes while working with fibres until your hands have been thoroughly
washed.
Keep all combustible materials away from the curing ovens and splicing machine.
Dispose of the fibre scraps by placing them in containers and sealing them.
Thoroughly clean the work area after completion of the installation or tests.
Do not smoke whilst working with fibre optic cables or fibre optic systems.
JOHANNESBURG DEVELOPMENT AGENCY (JDA) Contract No. JDA-WP 15N-02 Part T1: Technical Specification
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ANNEXURE A: LOOSE TUBE AND FIBRE COLOUR CODING TABLE
JOHANNESBURG DEVELOPMENT AGENCY (JDA) Contract No. JDA-WP 15N-02 Part T1: Technical Specification
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Project Name and Link Description
Manhole # End A Manhole # End B
Drum No. Cable Length
No of Fibres Make and Model of Test Equipment
Project Name and Link Description
ANNEXURE B: ATTENUATION TESTING OF FIBRE OPTIC CABLE POST INSTALLATION
This form must be completed and signed by the contractor post installation and prior to splicing the cable. This completed form and a soft copy of the OTDR results must be handed to the Fibreco representative for record purposes.
Manhole # End A Manhole # End B
Drum No. Cable Length
No of Fibres Make and Model of Test Equipment
Test results (dB)
Fibr e No
Tube 1
Tub e2
Tub e3
Tube 4
Tube 5
Tube 6
Tube 7
Tube 8
Tube 9
Tube 10
Tube 11
Tube 12
1
2
3
4
5
6
7
8
9
10
11
12
I hereby confirm that I have tested the fibre optic cable
Site Engineer / Subcontractor
Name Signature Date
Witnessed / Accepted by
Name Signature Date
JOHANNESBURG DEVELOPMENT AGENCY (JDA) Contract No. JDA-WP 15N-02 Part T1: Technical Specification
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G. Optical Fibre Conformance Test Procedure
1. SCOPE
The content of the document provides the guidelines, standards, procedures and pass/fail
criteria to be used with the qualification of installed fibre cable and related infrastructure.
Section 2 contains an overview of tests required.
The following fibre cable qualification tests are described in the document:
Visual Connector Inspection;
Optical Return Loss (ORL) and Reflectance;
Optical Link Loss Measurement;
Optical Time Domain Reflectometry (OTDR) measurements;
Polarization Mode Dispersion (PMD); and
Chromatic Dispersion (CD).
2. QUALIFICATION REQUIREMENT SUMMARY
Cable Acceptance tests will be done from an ODF to an ODF.
The following tests will be required for cable acceptance tests:
Optical Link Loss (or Insertion Loss) at wavelengths of 1550nm and 1625nm (in both
directions);
Optical Return Loss at wavelengths of 1550nm and 1625nm (in both directions) (tested
with ILM test set);
Reflectance at wavelengths of 1310nm and 1625nm (from both ends);
Bidirectional OTDR at wavelengths of 1550nm and 1625nm;
Chromatic Dispersion over C band, 1530nm and 1565nm to be recorded on
characterization report; and
Polarization Mode Dispersion over C band, 1530nm and 1565nm to be recorded on
characterization report.
If an additional Inter-facility cable test is required as part of the link, the following should be
performed:
Optical Link Loss after installation (in both directions); and
Reflectance at wavelengths of 1310nm and 1625nm from the patch closest to the
transmission equipment towards the outside cable.
3. REFERENCE DOCUMENTATION
Optic Fibre Cable Pre-Installation Test Procedure.
Optic Fibre Cable Post-Installation Test Procedure.
Relevant Naming conventions.
JOHANNESBURG DEVELOPMENT AGENCY (JDA) Contract No. JDA-WP 15N-02 Part T1: Technical Specification
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“Corning SMF28e+ Low Loss” and “Corning LEAF Optical Fibre” datasheets.
Polarization Mode Dispersion (PMD) is caused by the birefringence of optical fibre.
Birefringence causes the different polarization modes of an optical pulse to travel along
the fibre at slightly different speeds, causing the pulse to broaden.
PMD is the average Differential Group Delay (DGD) measured. PMD values are to be
taken uni-directionally at 1550nm and analyzed via a Route Mean Square (RMS)
algorithm for optical spans made up of more than one all-optical and separately tested
section.
High PMD increases the bit error rate, which limits bandwidth. This imposes limitation to
transmitting information at higher speeds and/or over longer distances.
All measurements shall be performed using a calibrated PMD test set.
PMD tests must be performed in factory and after installation.
ISO 9001 factory acceptance test certificates shall accompany all fibre cables
utilized in the project.
The Project Owner reserves the right to witness any or all factory tests.
Unidirectional Polarization Mode Dispersion measurements shall be taken without a
launch reel.
Polarization Mode Dispersion measurements shall be taken with the connectors
terminated on the optical distribution frame or patch panel.
Always perform all referencing and calibration tests as recommended by the test
equipment supplier.
All Polarization Mode Dispersion measurements shall be performed with the following
acquisition parameters and process:
Fibre length to be set to the distance as measured during the bidirectional
OTDR test;
Fibre type to be set according to fibre type deployed; and
Wavelength range to be set to include both the C- and L-band of wavelengths.
The PMD coefficient (measured in ps/√km) indicates the rate at which the pulse broadens
along the fibre length.
The guidelines for the expected cabled PMD values are shown in Table 7.
JOHANNESBURG DEVELOPMENT AGENCY (JDA) Contract No. JDA-WP 15N-02 Part T1: Technical Specification
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TABLE 7: EXPECTED CABLED PMD VALUES
Fibre installation type Expected PMD Value
New Fibre Installation (G.652D & G.655D & G656)
≤ 0.1 ps/√km
Existing Fibre Installation ≤ 0.2 ps/√km
Testing of Installed cables/fibres that have not been terminated onto frames/ equipment. Instances will arise where cables have been installed and jointed end to end but may not be terminated onto frames or equipment pending the readiness of the buildings or equipment. In such cases the cables/fibres must be subjected to the following tests as an interim acceptance.
Pre-installation testing of all fibres prior to hauling (On the drum test)
Post-installation testing of all fibres before jointing.
Bi-directional testing of all fibres on completion of splicing in accordance with section 6.5
above
End to end verification of correctness of splicing by using an OTDR with a light source at
the far end. This will confirm straight splicing with no cross overs or swapping of tubes
7. TEST RESULTS
All test results and files shall follow the specified naming convention.
Naming of Fibre Numbers.
A “Witness Test Report” will be filled in on the day of witness testing.
The person witnesses the testing should make an electronic copy of the raw data and trace
files.
The Final Test Report shall include:
The “Section ODF to ODF Acceptance” sheet;
Cable Summary Report in electronic and printed format;
All raw result files, appropriately named and zipped together in electronic format; and
Scanned calibration certificates.
As a minimum, the cable summary report shall contain the following information in the header:
Contractor.
Date testing was performed.
Name of the testing Technician.
Near End and Far End locations.
Location, Rack, Panel, and port of the Optical Distribution Frame or patch panel.
Type of test equipment used.
Calibration certificate number and date for test equipment used.
Project details.
Fibre link details.
Fibre type.
JOHANNESBURG DEVELOPMENT AGENCY (JDA) Contract No. JDA-WP 15N-02 Part T1: Technical Specification
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Tests performed.
Summarized measured results of tests performed. and
References to all detailed measured stored test results and traces.
An example header below:
All final test results shall be provided in the following formats:
One printed copy
Witness Test Report, with the following data: Point A, Point B, Total Length,
Operator A (being witnessed), Far-end Operator, Date of testing, Contractor;
Out of Specification Report;
Fibre Characterization, with the following data: Summary of OLTS, OTDR, CD,
PMD, Reflectance;
Splice Register; and
7.7.1.4.1 Acceptance certificate to be signed, with the following info.
7.7.1.4.2 Point A, Point B, Total Length, maximum allowed length, Number of
splices, Date of Testing, Subcontractor, Testing Operator, Far-end
operator.
Electronically (CD / USB)
Electronic report to be provided in Excel format
7.7.2.1.1 Fibre Characterization;
7.7.2.1.2 Bidirectional Splice Loss Report; and
7.7.2.1.3 Splice register: should contain the MH name, Coordinates and splice
closure.
Electronic reports to be provided in PDF format
7.7.2.2.1 Bidirectional Trace views; and
7.7.2.2.2 CD/PMD Trace view.
Other PDF reports (typically scanned)
7.7.2.3.1 Witness Test Report;
7.7.2.3.2 Calibration Certificates;
7.7.2.3.3 Floating Register; and
7.7.2.3.4 Fibre Factory test results (or in Excel).
Raw data to be provided (all data in the following folders and zipped in a single