1. Introduction – Backhaul Designs
The backhaul includes the TTFN (Temporary Transit Network) or the DFN (Distribution Fibre
Network) and refers to all the infrastructure between the Managed Service Provider (MSP
demarcation point) and the TFAN It can also refer to the DFN from the TFAN to the FDH.
2. Terms & definitions
AR
Access Route
AAR
Access Aggregation Region
AAS
Access and Associated Services
AN
Aggregation Node
ANSI
American National Standard Institute
BOM
Bill of Material
BOQ
Bill Of Quantity
CEV
Controlled Environmental Vault
CONSOL
D&CP
DCT
DD
Yarris’ web based data transfer system
Design & Constructional Procedures
Ducts
Design Drawing
DFN
Distribution Fibre Network
DJL
Distribution Cable Joint
DSS
Distribution Sheath Segment
DWDM
Dense Wavelength Division Multiplexing
DWF
Autodesk© Design Web Format file
DWG
AutoCAD© Drawing File
EAS
Ethernet Aggregation Switch
EIC
External Interconnection Cable
ETSI
European Telecommunication Standard Institute
FAN
Fibre Access Node
FDA
Fibre Distribution Area
FDH
Fibre Distribution Hub
FDR
Fibre Distribution Region
FDT
Fibre Distribution Terminal
FSA
Fibre Serving Area
FSAM
Fibre Service Area Module
FTTH
Fibre To The Home
FTTP
Fibre To The Premises
Gbps
Gigabit per second
GNAF
Geographical National Address File
GPON
Gigabit Passive Optical Network
HSD
Hub Sheath Segment Distribution
HSE
High Safety and Environment
IBC
Internal Backbone Cable
ICC
Internal Copper Tie Cable
IFC
Internal Facility Cable
LNI
Logical Network inventory
MDF
Main Distribution Frame
MHL
Manhole
MPLS
Multcolprotocol Label Switching
MSP
Managed Service Provider
NDD
Network Design Document
NTF
National Test Facility
ODF
Optical Distribution Frame
ODN
Optical Data Network
OLT
Optical Line Terminal
ONT
Optical Network Terminal
ONU
Optical Network Unit
OSI
Open System Interconnection
OSP
Outside Plant
OTN
Optical Terminal Node
OTP
Optical Transport Platform
P2P/PTP
Point 2 Point
PAR
Patch Array
PIT
Pits
PM
Project Manager
PNI
Physical Network Inventory
POI
Point of Interconnect
POL
Poles
PON
Passive Optical Network
PRT
Port
ROADM
ROW
RSDFN
RSP
Reconfigurable Optical Add Drop Multiplexer
Right of Way
Return Spur Distribution Fibre Network
Retail Service Provider
RU
Rack Unit
SDC
Sub Duct
SDU
Single Dwelling Unit
SFP
Small Form Pluggable
SLA
Service Level Agreement
SLD
Straight Line Diagram
SPL
SPATIAL info’s CAD based Design and Drafting platform as used by NBN
Co
Optical Splitter
SR
Sub Rack
TFN
Transit Fibre Network
Spatial NET
TFAN
Temporary Fibre Access Node
TJL
Transit Cable Joint
TO
Telecommunication Outlet
TSS
Transit Sheath Segment
uPVC
UV
VSAT
WD
WDH
WDM PON
WSA
WSAM
Un-plasticized Poly Vinyl Chloride
Ultraviolet
Very Small Aperture Terminal
Working Drawing
Wireless Distribution Hub
Wavelength Division Multiplexing - Passive Optical Network
Wireless Serving Area
Wireless Serving Area Module
3. Symbols
4. Inputs
S.
No.
Scope of Work
1
Items
Forms - BOQ, BOM, Transit Fibre
Splicing, FDA Transit Cable FOC
Summary and Distribution Splicing
Summary
2
Field Inspection Report ( .xls file)
3
Required
Required
Required
NA
5
Design Brief (NDD)
Field Schematic (DWG/DWF file
format)
Proposed Pit & Pipe Route (MapInfo
files)
Required
Required
6
NE Design
As Applicable
As Applicable
7
NA
Required
8
Survey Return Pack
Field Schematic Designed file (i.e.
sent for field survey)
Field Inspection Report (filled in by
the Survey team)
NA
Required
9
Survey Photos
NA
As Applicable
Power Plan Details
Marked-up Plans of the Design (in
PDF files)
Required
Required
NA
Required
4
10
11
Pre-Survey
Survey Returned
Keep a local copy of the same where the
template is common for every design
Required
Keep a local copy of the same where the
template is common for every design
NA
5. Inputs Validation
All the inputs received are validated against the check list - “NDD Input Check List_V1.xls” for any
mismatches like missing of details or any discrepancies. All the discrepancies are noted and
communicated to the client Project wise.
1) Check and validate for proper inputs in detail. If any of the input is missing the same need to
be informed to the client within 12hrs of input receipt and check for the missing data is
available with the client. Based on the client’s response we may have to reject the job
2)
3)
4)
5)
6)
7)
8)
9)
** Review the complete Design Brief and NDD documents to understand high level scope of
the project.
Check and validate whether Filed schematic is available in DWF or DWG format
Check and validate whether proposed design MapInfo data is available for the design
Check and validate whether proposed design Field Inspection Report is available
Check and validate the Survey Return Pack for updated Mark-up Plan and Field Schematic
drawing with Field surveyor comments duly filled as required
Check and validate whether Survey Photos are available as required
Check and validate whether Field Inspection Report is filled by the surveyor with required
data
** Check and validate the Power Plan Details are available, if not just Reject and inform
Client
10) Check and validate for any related NE project details are available
11) Check and validate for any adjacent BH Designs required for this project
12) Unless complete inputs are received team may reject the job but team may carry on with
available input if possible.
6. Design Process
Below are the detailed step by step process and the corresponding Design rules to be followed during
the design process.
1. Review the complete Design Brief and NDD documents to understand high level scope of the
project.
2. Convert the DWF file available in Field Schematic to DWG format.
3. Install SSC_NBN tool kit in C:\ drive(for beginner only, no need to install for every project)
4. Load nbn_support_infrastructure.lsp from above tool kit for placing the Pits, Ducts, and
Fibre & Labelling.
5. Identify the MSP (POI), TFAN and FDH location in the drawing.
6. Based on Mark up plans in Survey Return Pack and MapInfo data identify the existing duct
(Telstra...) route (Pits & Pipes) to be used.
7. Change the existing duct route( Pits/Manholes and Pipe) that are identified in previous step to
“CPR_UPDATE” Layer, Color-Green and Line type as Continuous.
8. Check for “Breakouts” location and place required NBN Pit and Pipe accordingly in
“Proposed” layer as per surveyor feedback
9. Propose the Pits and Pipes wherever existing pipe network is not available in “Proposed”
layer based on the recommendations of the Survey Return Pack
10. Pit should be placed at every 250m length(min 200 and max 250 m) of the duct and no duct
is more than 250 m in length in newly proposed routes
11. Place relevant Duct Cross Section for each segment in existing Duct only. Not for new duct.
12. Show the Cable Configuration in designated duct as per Field Inspection Report based on the
Occupancy of the Duct
13. Use the Field Surveyor instructions even if the duct occupancy is high
14. Review the proposed location in mark-up plans and photos to place TFAN and FDH
15. Use appropriate blocks to place TFAN and FDH (Standard naming convention to be followed
“3XXX-00-00-TAN-XXXX” &“3XXX-XX-XX-FDH-XXX”). Layer should be as per the Design
rules.
16. Check and refer for any related NE Project Design regarding FDH to Fan route(Distributin
network) and location
17. Check and refer adjacent BH Designs in case of any dependencies.
18. Always place a “9” pit in front of TFAN and FDH as well in all cases.
19. Place a 5m(In case duct length is not given) 2xP100 Pipes from the “9” pit to TFAN
20. Place a 5m(In case duct length is not given) 1xP100 Pipe from the “9” pit to FDH
21. Check and change the existing Pipe Lengths as per Field Return Reports
22. Duct digitisation direction for proposed route should be left to right and bottom to top.
23. Label the proposed pipes in standard format with unique Duct Number in standard format(
“3XXX-00-00-DCT-XXX”)
24. Length of the conduit in should be in metres with 0.0 Precision. So 23 metres conduit will be
captured with suffix “m” like 23.0m
25. Label the Pits in standard format with unique Pit Number(as per the tool)( “3XXX-00-00-PITXXX”).All new Pit symbol should be as per the tool and NBN Standard pit.
26. Start placing the cables as per the design rules exactly over the duct (existing or proposed)
27. The physical cable distance shall not exceed 4200 meter
28. Always run 12f transit cable from MSP to the Pit In front of POI Exchange and it will connect
to last ribbon of 288f
29. Place a Demarcation Joint if required or wherever it is mentioned by the surveyor.
30. Place an appropriate size Transit Cable from there to TFAN
31. Maintenance loops are required to provide for future augmentation including adding splice
closures to existing network and for maintenance activities as suggested in mark-up plans
32. 20m loop is required at change of direction more acute than 90° within manholes/pits
33. At distances no greater than 1000mtr between maintenance coils, splice closures or FAN
Sites
34. 10M loop is required on each side of the splice closure
35. 12F Transit cable will run from the “9” pit located in front of the TFAN to TFAN
36. Place TJLs as required (Standard naming convention to be followed “3XXX-XX-XX-TJLXXX”).
37. 72F DSS cable will run from the TFAN to the P9 pit located in front of the TFAN
38. Run appropriate DSS Cable from there to P9 pit located in front of FDH
39. Run 72F HSD cable from FDH to P9 pit located in front of FDH
40. Place DJLs accordingly (Standard naming convention to be followed “3XXX-XX-XX-DJLXXX”).
41. Insert block ”CABLE ANNO” for placing the labels of all the cables(Standard naming
convention to be followed “3XXX-XX-XX-TSS-XXX”/ “3XXX-XX-XX-DSS-XXX”) for every
segment.
42. There is no need to place BUMPS in BH Designs like NE for cable annotation
43. Place appropriate SORs as per the installation activities involved (Refer NBN-SOR.xls)
44. Place any constructional notes for Augmentation (building new pits, ducts and manholes etc.)
and Remedial (modifications to the existing ducts, pits & manholes) purposes need to place
note in the design as shown in the markup plan.
45. Using the tool, insert frames (NBN Working Sheet) on the completed drawing. Based on the
density of the design, frame count may increase from one to many.
46. Create SLD (Straight Line Diagram) in a separate frame and update the details
47. Capture the Power Cable Connectivity details in a separate frame based on the inputs and
field survey comments.
48. Update the NBN Title information using the tool “NBN Title Info” (Need to fill the highlighted
template)
49. Automatically after updating Title Info, tool will generate individual drawing windows based on
the number of frames created in the design.
50. Generate the BOQ (Bill of Quantity) using the tool. An excel will be generated based on the
SOR’s placed in the design. (The same will be auto generated in the design) and rename the
xls as per the Project ID.
51. Place this BOQ in first frame.
52. Refer “NBN-NO-GDE-002 Labelling Guidelines Passive Network v5.pdf” for standard
Labelling.
53. Refer “NBN-TE-CTO-484 Type 2 Passive Network Architecture for Temporary Fibre Access
Nodes in New Developments V1.1” for TFAN connectivity details
54. Refer “NBN-TE-CTO-490 Type 2 Architecture Passive Design Rules Ver2.0.pdf” for all other
general network design guidelines.
55. Refer “NBN-SOR.xls” for placement of SORs
56. Refer “NBN-TE-CTO-105 Coding Structures for Physical Elements v3.1” for naming of the
physical components of the Network.
57. Refer “SSC Distribution Centres.xls” for Delivery Address of SSM DC as per State wise.
58. Refer “Type II Approved materials list - NBN Greenfields (v1 SSM 16-05-2011).xls” for Parts
List, Equipment Code and Vendor Details
7. FORMS Filling
On the completion of the design plan, we need to fill the below forms that must accompany
the completed project. Below are the details
7.1.1.1 BOQ TOTAL: This is auto generated form after running the BOQ tool in the completed design.
7.1.1.2 Distribution splicing template: Update State prefix, FSA Code, FSAM and FDA fields. Also
update Cable Type, Number, Splice Joint Type and Number. Also verify the splice connection
details as per our design plan
7.1.1.3 Transit splicing template: Update State prefix, FSA Code, FSAM and FDA fields. Also update
Cable Type, Number, Splice Joint Type and Number. Also verify the splice connection details as
per our design plan
7.1.1.4 FDA Transit Cable FOC Summary: In this template fill the e columns Transit Cable Section
Identifier, Project ID, Country_Descr, State_Descr, City, Street and fibre count No ( ) cable size
7.1.1.5 BH_BOM_Type2: Update the fields Dev type, State, SSM DC to be delivered to (based on the
reference file), Request ID (project name), Category, Item Description, Supplier, Part No and
Quantity.
8. SORs
Refer “NBN-SOR.xls” for placement of SORs. Please refer the below table for some standard SORs.
9. Layers & Symbology
10. Snaps
Figure 1 X-Section of Stranded Fibre Cable
Figure 2: Stranded Fibre Cable
Figure 3: X-Section of Ribbon Fibre Cable
Figure 4: Reibbon Fibre Cable
Figure 5: TFAN
Figure 6: Inside View of TFAN
Figure 7: DJL/TJL Splice Closure
Figure 8: Placement of Splice Closure in Pit
Figure 9: Demarcation Splice
Figure 10: Autogenerated BOQ
Figure 11: Sample Power Plan
Figure 12: Sample SLD