This document provides the scope of work for installing fibre between Athene and Duffs Road Station in KwaZulu-Natal, South Africa. It involves three key tasks: 1) replacing broken fibre sections between Athene and Stanger, 2) trenching 1km of fibre from Stanger Comms to join an existing duct, and 3) blowing 65km of fibre between Stanger and Duffs Road Station. The work is expected to take one month to complete and includes fibre installation, testing, and handover to the maintenance team. Detailed planning and risk mitigation measures are outlined to guide the work.

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Annexure F: Scope of Work:
Fibre Installation between Athene and Duffs Road Station

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TABLE OF CONTENTS
1 ACRONYMS .............................................................................................................................3
2 REFERENCE DOCUMENTATION .............................................................................................3
3 OVERVIEW ..............................................................................................................................3
4 ROUTE DESIGN.......................................................................................................................4
5 SCOPE OF WORK ....................................................................................................................4
5.1 Fibre Replacement at fibre-breaks sections (Athene - Stanger)...........................................4
5.2 Trenching of 1km to join the existing duct ..........................................................................5
5.3 Fibre Blow (Installation) between Stanger and Duffs Road Station ......................................6
6 PLAN OF WORK .......................................................................................................................7
7 RISKS ......................................................................................................................................7
8 KEY ASSUMPTIONS.................................................................................................................7
9 BILL OF QUANTITIES ...............................................................................................................8

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1 ACRONYMS
ACRONYMS DESCRIPTIONS
ATP Acceptance Test Procedure
BBI Broadband Infraco
CISC Capital Investment Steering Committee
ODF Optical Digital Frame
SDH Synchronous Digital Hierarchy
STM Synchronous Transport Module
BBI Broadband Infraco
TFR Transnet Freight Rail
km kilometres
CD Chromatic Dispersion
PMD Polarisation Mode Dispersion
DRC Design Review Committee
R Rands
TNMS Telecommunication Network Management System
RX Receiver
TX Transmitter
dB Decibels
dBm power ratio in decibels (dB) of the measured power referenced to
one milliwatt
km Kilometre
nm Nanometre
p.a per annual
2 REFERENCE DOCUMENTATION
Document Number Document Name Origin
NE-NT-SP-0048 Installation Guidelines for Trenched civil infrastructure BBI
3 OVERVIEW
This scope of work details requirements for the following once the end-to-end survey is completed:
 Fibre replacement between Athene and Stanger
o Seven breaks need to replaced by new fibre (24 – core Duct)
o Fibre will be replaced between manhole to manhole on the affected sections
o Fibre will be encased by steal pipe at the bridges crossing
o End-to-end fibre testing once the fibre is commissioned
 1km Trenching from Stanger Comms to join the existing duct towards Duffs Road

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o Directional drilling to cross the railway
o Normal trenching before and after railway crossing
o Install two handholes before and after railway crossing
 Fibre blow (Installation) between Stanger Comms and Duffs road
o Blow the 65 km of fibre between Stanger Comms and Duffs Road (24 – Core Duct)
o Terminate the fibre on the ODF at Duffs road Station, TFR room
o End-to-end fibre testing once the fibre installation is completed/ commissioned
o Overall end-to-end fibre testing once the fibre is commissioned between Athene and Duffs Road
4 ROUTE DESIGN
A logical way to proceed with designing a fiber optic link involves analyzing the fiber optic link power budget, also
called an optical link loss budget. Annexure A illustrates the key required optical calculations for designing a fiber
optic link. The link should comply to annexure A once is fully commissioned, then it can be handed over to Broadband
Infraco (Maintenance).
5 SCOPE OF WORK
The scope of work shall be to supply, install and commission all fibre links between Athene and Duffs Road Station
(KwaMashu, Durban). The fibre will be terminated in the ODF at both Stanger and Duffs road Station. The outstanding
tasks will be categorized into two categories, namely: Fibre replacement and fibre blow (Installation). The fibre
replacement and new installation must comply to reference documentations:
5.1 Fibre Replacement at fibre-breaks sections (Athene - Stanger)
The fibre will be blown from manhole to manhole where there are fibre-breaks to avoid creating more joints as this will
result in more losses. Annexure B shows the overall tasks need to be done to complete the outstanding work on this
project.
The fibre replacement will be done as follows, once the materials (fibre and accessories) have been delivered to
Stanger. The recovered fibre will be scrapped by the appointed contractor and provide safe disposal certificate to
Broadband Infraco afterwards. The project manager / project co-ordinator will arrange with TFR for storage of
Broadband Infraco’s material:
 Recover the broken fibre between manhole 52 to manhole 56/06, then blow the new drum (4km) of duct fibre
between these two manholes to fix the fibre-break at Matikulu Bridge 55/7.
 Recover the broken fibre between manhole 60 to manhole 64, and then blow the new drum (4km) of duct fibre
between these two manholes to fix the fibre-break at Inyoni yellow Bridge 62/03.
 Recover the broken fibre between manhole 64 to manhole 67/15, then blow the new drum (4km) of duct fibre
between these two manholes to fix the fibre-break at Mast 65/03 and Mast 67/01. These two fibre-breaks will
be covered by one drum (4km) of fibre as they are between two manholes.
 Recover the broken fibre between manhole 71/14 to manhole 75/14, then blow the new drum (4km) of duct
fibre between these two manholes to fix the fibre-break at Mast 73/14.

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 Recover the broken fibre between manhole 81/13 to manhole 85, and then blow the new drum (4km) of duct
fibre between these two manholes to fix the two unknown fibre-breaks between these two manholes.
 The fibre must be encased with steel pipes (galvanised) where it crosses the bridges to minimise the possible
vandalism.
5.2 Trenching of 1km to join the existing duct
The trenching of one kilometre from Stanger Comms (site) towards Duffs road to join the existing duct is required to
complete the duct between Stanger and Duffs Road. The following tasks are required to complete this 1km trenching:
 Trenching from TFR manhole towards existing duct as it is shown in annexure C.
 Directional drilling to cross the railway
 Install two handholes before and after railway at number 2 and 3 as it is shown in annexure C.
The soil structure around the Stanger station is soft soil type, where 1km of trenching will be done.

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5.3 Fibre Blow (Installation) between Stanger and Duffs Road Station
The fibre blow (Fibre Installation) for 65km distance. For more information refer to annexure B.
 Duct inspection to be done by the appointed contractor and Broadband Infraco representatives (Field
Specialist and Project Manager / Project co-ordinator), then fix defects where it is required.
 Blow fibre between Stanger and Duffs road once the duct is defects-free.
 Terminate the fibre in ODF at both Stanger and Duffs Road Station
 Do end-to-end fibre testing between Athene to Duffs Road Station
 Fibre test results to be provided for the fibre replacement section and the newly installed section
 Hand over the fibre link to Broadband Infraco (Maintenance) once is fully commissioned.
Figure 1: Shows the Geographical view between Athene and Duffs Road, via Stanger
3

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6 PLAN OF WORK
It is anticipated that the completion of this project will take a month from the performance of a detailed survey by the
recommended service provider to handover after installation and commissioning of the link.
The time breakdown for the project is shown below:
Time Projected to complete this project
Time Duration
Detailed Survey by Contractor
1 Week after award of
the bid Dependent on award date
Installation and Commissioning of
the link
15 days after the
detailed survey by the
contractor Dependent on award date
Handover 1 Day
Dependent on finalisation of
installation and commisioning
7 RISKS
The potential risks are stated below:
 Ducts blocked by sand between Stanger and Duffs Road Station
 Handholes and Manholes damaged
 Tubes damaged, 110mm PVC pipes
 Fibre exposure at bridges’ crossings
These above risks will be mitigated by detailed survey that will be conducted by the appointed contractor in
conjunction with Broadband Infraco representatives. The appointed contractor will use the specialised machineries to
test the existing duct before blowing the fibre. The galvanised steel pipes will be extended down to the existing duct
and be will be encased with concrete.
8 KEY ASSUMPTIONS
The following assumptions have been made:
 The unforeseen risks will be within the allocated risk allowance
 The fibre replacements will be done instead of repairing it to avoid many losses on the new link
 Sixty percent of the handholes were installed based on the provisional ‘built’ document
 The project will be completed within the allocated time

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9 BILL OF QUANTITIES
The tables below show the bill of quantities required for fibre installation between Athene and Duffs Road Station
Fibre replacement between Athene and Stanger (sections with breaks only )
Number Items Quantity
1. 4 km drum, Duct fibre (UG) 6
2. Dome joint (Provision for spares) 3
3. 50mm galvanised pipe, 6m length 7
4. Couplers (for 50mm pipe) 14
5. Couplers- waterproof (for 32mm PVC sub duct) 20
1 km Trenching to join the existing duct
Number Items Quantity
1. Handhole, 600mm X 600mm 2
2. 32mm PVC sub duct, 1km 1
Fibre blow (Installation) between Stanger and Duffs Road
Number Items Quantity
1. 4 km drum, Duct fibre (UG) 17
2. Handhole, 600mm X 600mm 40
3. Dome joint (Provision for spares) 20
4. ODF at Duff Road 1
5. Patch Panel (E2000) 2
Broadband Infraco will provide the following materials:
 Dome joints
 32mm PVC pipe
 Drums of fibre
 Patch panel (E2000)
The appointed contractor will provide the following materials:
 Handhole, 600mm X 600mm
 50mm galvanised pipe, 6m length
 Couplers (for 50mm pipe)
 Couplers- waterproof (for 32mm PVC sub duct)
 Miscellaneous

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The as built documentation will be provided by appointed contractor once the outstanding tasks have been completed
and complied according to provided specifications. This will happen during the handover process. The as built
documentation will be handed over to maintenance for their records.
ANNEXURE A: SHOWS THE OPTICAL FIBRE LINK BUDGET FOR ATHENE TO DUFFS ROAD
STATION
Loss (dB) Distance (Km)
0.5
0.35
0.22
0.1
4
3
Distance (Km)
Total Cable Att/1550nm
(dB)
Number of
Splices
Total Splice Att
(dB)
Total Connector Att
(dB)
105 23.1 26.25 2.7 2
65 14.3 16.25 1.7 2
Duff Road <=> Stanger
1310nm
1550nm
RX Sensitivity Power
(dBm)
Total Power Budget
(dB)
Estimated Tx Power
on Pout/Ch (dBm)
Calculated RX Power
EOL (dBm)
Expected RX Power
BOL (dBm)
-25 42 14 -16.8 -13.8
-25 42 10 -11 -8
Mated Connector Loss
Cable Attenuation at 1310nm
Cable Attenuation at 1550nm
Duff Road <=> Stanger
Distance between splices (BBI)
17 21
Fibre Cable Loss Budget
Athene <=> Stanger
Link/Unidirection
TX Power Threshold max
(dBm)
17
Net Optical Power Budget
(dB)
11.2
Total Link Loss EOL (dB)
1310nm
1550nm
44.45
30.8
Athene <=> Stanger <=> Duff Road Optical Fibre Link Budget
Athene <=> Stanger
Duff Road <=> Stanger
Athene <=> Stanger
Link Power Budget
Total Link Loss EOL (dB)
29.45
21
36.75
22.75
Total Cable Att/1310nm (dB)
SM Fibre Cable Recommended Loss Values
Splice Attenuation
Safety Margin (EOL)
Link/Unidirection
Chromatic Dispersion Table
Bit Rate Maximum Dispersion (ps/nm)
2.5Gb/s 12800
10Gb/s 800
40Gb/s 50
Bit rate/channel SDH Bit Time Max PMD limit 0.08 ps/√km 0.2 ps/√km 1 ps/√km
2.5 Gb/s STM-16 400ps 40ps 250000 km 40 000 km 1600 km
10G Gb/s STM-64 100ps 10ps 15000 km 2 500 km 100 km
40 Gb/s STM-256 25ps 2.5ps 1000 km 160 km 6 km
Maximum Link length
Toralable PMD coeffients and limits translated into fibre lengths

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ANNEXURE B: SHOWS THE OVERALL TASKS NEED TO BE DONE

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ANNEXURE C: Shows the overall tasks need to be done to complete the outstanding work on this project
TFR Building
N
Building 2
0
TAXI RANK
TFR Building
Security
Room
Gate
Platform
Road
House
Car port
Gate
Stanger Station
Pole
Manhole
Mast Pole
Hand hole
Tower
D
C
B
A
4 3 2 1
D
C
B
A
4 3 2 1
Duffs Road-Stanger Route (Re-Routing at Stanger Station)
Legend:
Directional Drilling
Railway Line
Platform
Fibre Cable
110 mm Sleeve
32 mm Subduct
Existing TFR Sleeve
TFR Fence
Existing Subduct to be re-routed
Advised route to avoid Single point of failure cross 1 km before
stanger station
Tree Tree
Station
Platform
Platform
Platform
1
2
3

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