Install question: Run CSP-ONT fibre under my floor?

[#1]

Currently, the elderly copper phone cable comes through a hole in the front wall of the house.
Then down through a small hole in the floor, where the unprotected cable runs 4-5 metres, emerging back up into a cupboard where the master socket is located.
That cupboard is the nexus of my network (incoming cables from MESH extenders, Local DNS Raspberry Pi. mains).
Keen our compulsory FTTP upgrade follows the same route and installs the ONT in the cupboard where the existing Master Socket is.

I don't expect the OR engineer to crawl about under the floor space, but if I get down there, is it feasible to get the engineer to feed the CSP-ONT cable down the hole to me, pause while I worm under the joists and poke it back up, where he can replace the master socket with the ONT?

Does the CSP-ONT fibre connector start life with plug-in connectors at both ends, or does the engineer splice bare fibre into the CSP?
Might my sub-floor routing contaminate the end of the fibre and render it useless?
Would he insist the under-floor run is completely ducted, from down-hole to up-hole (tricky).

There are other possible ways of doing it, but none are anything like as neat.

TIA

Mark (on behalf of my Plusnet-customer SO)

[#2]

@markv 

The ONT and router can be up to 100m apart if interconnected with CAT5e or better Ethernet cable. By far the easiest solution, that takes all negotiation with the installer out of the argument is to have the ONT installed next to a mains supply on an outer wall, and install your own Ethernet cable to the desired Router location. You can do this prior to the fibre installation so that it's all ready to go.

If you don't have a mains socket available in a convenient location then have an extension lead available for the ONT. Once the installer has gone you can swap this out by using POE on the WAN cable. I have suucessfully run an ONT over CAT5e cable using a TP-Link TL-POE150S Injector and POE 10R splitter

[#3]

Hi @Baldrick1 

Thanks for your prompt response. I'm aware of the alternative installation options. Your suggestion is one option, but not preferred.
As per my OP, I'm asking about the practicalities of running ~5 metres of fibre from the new ONT, under my floor, through the dirty, dusty footings, up and out through the wall to the CSP.

I know almost nothing about the physical aspects of fibre connections.

e.g. does the CSP<-> ONT fibre 'cable' have plug-in connectors at each end, or does the engineer attach the connectors (otherwise, how would he get a fibre with an attached connector, through a hole in the wall that is only big enough for a fibre?

Mark

[#4]

@markv 

If you're willing to take a chance on the ONT being where the copper cable comes into the house then you could pre install duct under the floorboards with a draw string in place. If you need to use ethernet cable with plugs then you would need to ensure both holes and duct are wide enough to pull cable through.

You might, just might, get the installer to run the fibre cabke thought the duct for the ONT at your desired location but you would have ethernet as your back up.

The "house" cable is spliced at the CSP - which funnily enough is called a Customer Splice Point.

Brian

Edit : View https://www.openreach.com/help-and-support/full-fibre-broadband-installation-checklist#accordion-b43...

[#5]

@markv 

I know almost nothing about the physical aspects of fibre connections.

e.g. does the CSP<-> ONT fibre 'cable' have plug-in connectors at each end, or does the engineer attach the connectors (otherwise, how would he get a fibre with an attached connector, through a hole in the wall that is only big enough for a fibre?

The cable has a plug connector pre-fitted at the ONT end. As @bmc says, the other end is spliced at the CSP

The cables come in pre-cut lengths up to 10m. Any excess length is coiled in the CSP 

[#6]

@markv 

This kit might be worth considering https://shop.premitel.uk/product/fibre-termination-point-relocation-kit/ 

[#7]

Some really useful info coming in; many thanks.

So in practice, the fibre cable would start at the ONT end (ideally in my network cupboard). Down, under the floor, up and out through the wall where the engineer wipes it clean and splices in the CSP.

I could prepare a duct/pull-cord in advance to facilitate things.

Can a piece of string be attached to a fibre cable for pulling?
AI suggests I will need something called a 'Pulling grip', but more reading says that is only used when pulling fibre for hundreds of metres.

To repeat a moan I have read here hundreds of times... why is it so complicated/difficult?