moving a router with fiber

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deeprty

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Dec 14, 2006
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hi

have used this forum a few times to confirm my pc builds with great success so i thought i would chance a little more help on this issue.

///in short/// i want to buy a 20m long patch cable and replace the 0.5m one//////////

i have a router that i wish to move from upstairs to the downstairs separate apartment. the purpose for this IS to move the router, no other reason, i am currently wired downstairs via Ethernet and all is fine.

i am not at all clued up on fibre networks so please forgive any nonsense i say
i believe the router is connected directly to the fibre cable
the cable has printed on it "optic fibre cable 3.0 SM G652D-9 125 LSZH", is yellow with a green connector which i think is a sc/apc
the other end has the same connection and is connected to a white box which has very thin yellow cable leading out of the property

my possibly too easy solution is to get a cable of the same type only longer say 20m and run it downstairs via the inner ducting in the house(all prepared)
The ducting has no power in it and will eventually have a "normal" telephone cable for the EU, a coax for TV and possibly a Ethernet cable

my understanding is that i require a fibre patch cable single mode with a sc to sc connection of type apc. Please inform me if i'm wrong

so my questions are
Can i just buy a longer cable? is it that easy?

if yes then is this cable ok?
https://www.fs.com/products/41656.html
is that company ok?

this wire say's it is 2.0mm and as it is in stock in the EU warehouse, i would receive it quicker is this one ok ?
https://www.fs.com/products/41923.html

there is lots of information about these cables that i simply don't understand so i am concerned if i am choosing correctly
Any and all advice is appreciated
I can get any info you require (hopefully) and can get pictures if wanted
i obviously want the internet to be as good as it is now so please correct anything you see as a problem.
I do not need to buy from the link provided but it is the cheapest i found
i am in the EU , Spain
 
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bill001g

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Aug 9, 2012
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You have done your research it appears.

It should work. The key being it is single mode 9 micron fiber with the correct end connectors. The sc-sc connector is actually just a piece of plastic that keep the ends aligned so the light from one fiber enters the other correctly. They cost a lot for something so simple but good alignment is critical.

Be extremely careful with the fiber. Many times the fiber the ISP provides is the outdoor fiber they just terminate. The fiber is not protected as well as as a patch cable. Even the patch cable you have is very easy to damage. The key is the bend radius. You can crack the fiber by doing something as simple as winding it around your finger.

The signal on single mode fiber goes huge distances so adding 20 meters should not have much effect. The coupler between the fibers will actually cause more loss than the extra fiber. It is all going to depend if your signal levels are already near the maximum and there is no way for you to test this.

Most ISP do not really want you messing with the fiber. I know most the actual fiber installs in the USA terminate in a box called a ONT and you plug a router into that with ethernet or coax. So nobody messes with the fiber.
 
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Dugimodo

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Sep 22, 2011
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The first one is a bit short and is armoured cable - just meaning it's tougher and harder to damage.

I don't know what is used by your router, but as long as you get the connector type right and the right mode (single mode, multi mode) then it's probably ok. The frequency is important as well, but I see the cable has loss figures @ 1310 & 1550 nM which are the two most commonly used frequencies in telecommunications equipment.

Sadly I can't tell you for sure it'll work, hopefully someone else can. Just be caerful when running it to avoid too much tension and sharp bends. The cable may seem fairly tough but the fibre is very delicate and easily broken. Gentle curves are best - you'll note there is a minmum bend radius specified.
 
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deeprty

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Dec 14, 2006
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thanks for replying so quick, i have tried too research a little , didn't want to ask before i tried myself

i am aware about the ONT which is one reason why i am asking as my setup is different.
if i am understanding you the info i am missing is to confirm it is a 9 micron fibre
i take it that this "9/125μm" is that info?
i was reading that the "apc" part of the connection type vs a upc part was also important? no?

i will be running through existing ducting and have no idea if there are tight turns in it but believe most of it is straight but i will be as careful with the cable as i can be, cheers for the heads up.
So it looks like i just order and give it a go in the next day or so cheers!!
 
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Dugimodo

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The other point is do not touch the ends and keep them capped. There are actually specialised cleaning tools for the connector ends which most people wont have. A microsopic piece of dust in the wrong place can kill the signal.

If you do have to clean them yourself probably the best you can do at home is a lint free fine tissue on a flat surface and gently stroke the connector across it, but get it wrong or use the wrong kind of tissue and you'll make it worse.

so it is as simple as you think, but you have to know what you're doing.
 
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nobspls

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Mar 14, 2018
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Assuming you are getting the right fiber and the pictures you provided seems to be a valid type, and assuming you do not have some misunderstanding about the already at your place, this should theoretically work.

That being said, fiber is fragile and do NOT like to take sharp corners, and never try to make knots out of the cable. That will wreck your fiber, and even if does not physically break, kinked up fiber will destroy the light signal being transmitted and you will have a very bad time with the internet.

Also you need to keep the fiber ends clean. If there is so much as spec dust, that will introduce all sorts of errors into your packets. You would be advised to get fiber cleaners like this:
https://www.youtube.com/watch?v=rr95O6WaKl8

And see:
https://www.youtube.com/watch?v=7_PrhlrKc6o
 
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deeprty

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Dec 14, 2006
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thanks good to know the idea is at least plausible.
The cables can come at my required length and thanks for the info on frequencies
so the difference between the 3.0 and the 2.0 is only the armoured cable? and the 2.0 cable will be fine?!

also thanks for your other post regarding the ends, i have unplugged the existing cable without knowing that so i got lucky but now i know
 
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deeprty

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Dec 14, 2006
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yep thanks man ,warnings all very clear, not gonna touch the existing cable until i get the new one and will be very careful with that.

cheers
 
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