I wired up a ~40m long CAT6 cable following T568B pinout.
According to my tester, pins #6 and #8 are not functional.
I have re-wired both ends several times to make sure it's not my poor crimping; looks like the cable must have some damage.
I would prefer to not have to replace the cable because it's inside walls and ceilings (which is probably where it sustained damage, if any).
Is this usable?