Fiber cable connectivity

Tiras25 used Ask the Experts™
My contractor ran fiber cables between floors.  Today I noticed there's an interesting transition connection from thicker cable to the thinner one.  Taped over with while electrical tape.
I didn't have that fiber patch panel.  They install it all.  Taped like that on both end of terminations.

  Does anyone know if this is how its done normally and should I worry about it?  Thanks.
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atlas_shudderedSr. Network Engineer

Tiras - can you post a pic?


Sorry about that.  Just attached.
Sr. Network Engineer
Can't say that I have ever seen anything like that in a fiber tray before.


Contractor undershot total run distance and spliced in what he had to make up the difference.
Contractor found the higher strand cable not flexible enough for the tray and spliced down to smaller diameter to gain loop in tray.
Contractor got a better deal on the larger diameter and spliced down at the tray to limit number of open pairs for future splicing.

What does it look like on the far side?
Have you asked the contractor?  If not, do, but keep your question open ended, don't offer any potential reasons.  See what the response is.
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What you see is the inner tube of the cable. i see this very often with contractors peeling of the outer layer of the cable to make it more flexible to insert them in the tray. this type of cable is normal not used as in house cabling.

The outer sheath (often referred to as a jacket) is there to protect the cables within, and is quite tough/inflexible. it's usually cut back within the cabinet to reveal a more flexible inner sheath.
Tape is usually used to cover the cut end as it's not always a neat cut and the installer may not feel it looks very nice if left on show. many installers use a colour-matched tape so it doesn't stand out but it's really a personal preference.

Nothing to worry about but just ask them to peel the tape back to show you if you're likely to be left worrying about it.
Personally, if I paid for a professional job, I would expect it to look that way. If I (as an IT person) am asking about it out of concern, I would think IT management would begin asking the same questions.

Based on the answers above, it may be nothing to worry about. However, while it is clean, I would ask them to make it look a little more professional than "electrical tape" professional.

If they used cabinets as we use, you would not even seen it. It looks cheap what they made

I'm assuming you found it that way after the fact and they didn't explain it to you at all before ... what Benjamin Van Ditmars said (and showed) ... while it might do the job and be what others do, if I paid the bill, I would not accept it.
You dont fix the fibre cables with a couple of cable binders. when it snaps for what kinda reason and youre fibres snap it;s all over.
call them back and let them fix it good. we have several 100's internal fibers in the cabinets. the last thing you want to worry about is working in a cabinet and loose youre fibre connections.


Hi Benjamin, Thanks!
 Which trays did you use before in your image?  Make/model?


We only use Panduit. it's our brand for normal patch panels. fibers and all the other rack equipment we use.
there stuff is almost unbreakable.

this is often the way it looks like when 2 fibers are joined together.

the duct tape does no harm. the fact the fibres are joined and the way the junction was made/tested is what is important.
having a single fibre almost always produces a better throughput than joining multiple ones.
but most of the time, the fibre totally outperforms the hardware on both sides so you'll end up with the maximum expected throughput anyway.

test it.

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