As said before testing is advised.
The correct tool is called a "Time Domain Reflexometer". or TDR.
Some notes on cabling:
CAT type cable is always "Over under" coiled like any cable that you respect.
Violators should be sent out the door, opening said door being optional
When you get a kink in CAT or fibre, it is compromised.
Sure the electrons (or photons in fibre) still flow but the characteristic of the cable changes.
Do not exceed a bending radius that you can't put a 5in CD on the inside of.
When that apprentice coiled a CAT-5 cable around their elbow, in 1 shot they converted your CAT-5 to a CAT-3 !
There are some electrical characteristics that distinguish each of these standards from each other.
Im trying to recall if ordinary twisted doorbell
wire is CAT-2 or 1. Probably depends on the twists per inch.
Exceeding the bending radius of a cable causes the conductors in the cable to move just a teensy
bit and that little
bit is
enough to change the characteristics of that section of the cable.
The overall characteristics of the cable are equal to the worst segment along it.
This is why we all learned to "over-under" coil out cable, and why my welcome speech to volunteers states
"First time you coil anything around your elbow, you are PERMANENTLY GONE!"
Im leery of trying to work out a kink from solid
conductor cable.
If it breaks, its dead.
If you leave the kink where it is, it will still work, just not as well.
(IE: Compromised CAT-6 might only act like CAT-4 or 3, but KINDA still work)
Stranded, I might take out on the
loading dock on a warm day, get warm in sun and GENTLY massage the kink out of it.
About fibre:
Again, the light still goes through it, but it doesn't act right.
Kinked fibre at that spot has micro fractures in the optical
conductor that cause excessive side to side reflections at that
point.
In fibre, the damage doesn't always show up immediately.
You might not notice the problem until 6 months after "Numbnuts" drove the
cherry picker over the new optical
line that you
had laid out for pulling through
conduit.
I also don't like to "fly" optical, unless Im flying a
conduit with the optical in it.
Flying it "raw" causes it to sag & stretch with time and eventually go out of spec.
With the growth of computers on both sides of the arch, audio & video systems are picking up more digital noise.
As time progresses, long audio & video are moving to fibre to keep them clean.