Aerial FTTH OSP installation discussions

How to plan a FTTH aerical deployment

  As known, planning and design is always the first step to avoid network project’s mess and failure. Today FOT is sharing fiber optics knowledge and experience, with the technology and processes involved in installation of outside plant (OSP) aerial FTTH case discussions. 

Topic: How to plan a FTTH aerial solution engineering deployment in a city or town?

  Following is the hot discussions:

I’m very much interested in this topic because in the telecommunication company I work are planning to roll out FTTx using our existing telephone poles.
aerial FTTH OSP installation

aerial FTTH OSP installation

One plan is, while making an all inclusive sweep of “Aerial Make Ready Work” – GPS all poles and make notes re: pole replacement, existing utility attachment heights, use of extension arm, grounding, tree trimming, addresses of all units for wiring limits, etc.
With this data you can use apply to GPS Land base and design away from anywhere.
Pre-Terminated fiber cable can be very tempting to ROI, but beware, it has natural draw backs; Utilize coils to your advantage.

  “To plan a solution like this you need to consider the subscriber quantity and distance between them and the central office so you can design distribution methods and know what materials.”

  “First you need to know the electrical network in this city is underground or over head ..if is it overhead you need to get the drawings for medium voltage and low voltage poles .. Then determined the sited,, survey ,, design ,, BOQ finally estimate cost”

FTTH OSP installation work

FTTH OSP installation work

I worked on a project of 80,000 homes from scratch and without doubt the biggest problem with overhead delivery was the existing plant records…everything needed surveying from scratch which takes up a lot of resource and time.. I’d be really interested to receive the document and see how much rings true from my own experience.
Agree with friends above, important things to consider and people often overlook items following…
Who owns the poles?
what permissions are needed if any equipment is being added SLA’s for permissions
Inductions to use the poles if owned by lets say the electricity company
Bonding is also overlooked.
Its very well learning about how to plan and install but it all comes to an halt if the correct permissions are not in place at the start.

  “I enjoyed the discussion so far. During survey are there existing manholes linked in the town (metro manhole). Also try getting permit before flying cables on existing poles as in my country such permission is vital before embarking on the project.”

Permissions to use electric poles added quite a delay on a big rollout project and they asked for a lot of maintenance work for the additional loading.. tree trimming, pole stays etc.. for survey we had teams locating poles on plan which were then double checked by the planner.. if the pole information is out it causes problems.. client was very rigid on number of spans to premise and number of drops per span so the surveys became crucial..
As points out where its a combination of underground(UG) and Overhead those lateral connections between manhole and pole need to be picked up accurately. In our case the client wanted to utilise UG wherever possible which in certain areas made the design complicated. Especially if you’re in an urbanized area and need to be accessing customers.. Great linking up build areas up but tricky within a distribution area when you have sporadic lengths of duct linking to overhead networks..

  “simple advice, please care to consider a maintenance loop or provision for splicing on any possible cable cut. Sometimes they forget this in calculating the cable length”

FTTH OSP installation: sharing poles

FTTH OSP installation: sharing poles

Hi all,
the discussion is going very good.
I just want to add my opinion here that if we will install new poles on the sites than it will be much easier and quick and also u can share it with any other company as well to minimize your cost. one more thing in this manner will help you in the maintenance point as this would be a whole new structure so it is easy to troubleshoot any fault.
If you are dropping in your own NEW poles and going 100% overhead it is easy. If you drop on shared / existing poles a survey needs to be done to understand if the infrastructure is designed for the loading you are about to introduce… is it suitable for Feeder cables and Drops or just drops?. If you have very strong poles <70m apart it may be easy. However, If like the UK you have very old poorly maintained poles, intended for only drop cables that have an underground duct feed life gets difficult especially as those ducts could have been dormant for many years and possibly blocked…..

  “A point on the shared pole… 1 company has to be responsible for the maintenance of the pole and it does get quite ugly when multiple vendors start using the same, especially when the equipment is not similar (aesthetics wise)
  Pole replacement…as we know isn’t in the same position so take account that new laterals from the UG network would also be needed.”

Hi All,
a short recap about our experience about UBB services provided using aerial deployment (f.o. and copper cables).
Since 2012 year and from scratch, our subsidiary Company TIM Brasil develops his TIM Fiber project, providing fixed UBB FTTC VDSL2 services in the metropolitan areas of Rio de Janeiro and S?o Paulo, using several MSANs installed on street poles and connecting each buildings with dedicated copper cables.
The offer, called “LIVE TIM,” is consumer market-oriented, it provides profiles UP/DW speeds: 35/20Mbps, 50/30,Mbps, 70/30Mbps and from last December 90/30Mbps.
Suitable architectures must be chosen according with the UBB/BB offers you will provide to the Customers and with the population density areas.
I suggest you to consider also a coming soon FTTdp (for short copper cables drop, for example till 250 m.), instead FTTH architecture only.
Best regards,
FTTH OSP installation: aerial case

FTTH OSP installation: aerial case

  “I am working in the same Field design FTTH.

  1. Visit the electrical company where you will deploy the project to get a pole rent contract.
  2. Visit the local government to know regulations to install new poles.

  For me are the First planning activities to star any aerial FTTH project.”

Its quite simple actually. There are tools and software available that do most of the work. These measure existing attachments, perform make ready analysis and loading calcs. Combine these with GIS mapping to streamline design and engineering costs.
Its quite simple actually. There are tools and software available that do most of the work. These measure existing attachments, perform make ready analysis and loading calcs. Combine these with GIS mapping to streamline design and engineering costs.

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