I am trying to see if I read you right.  Yes, a VDV is very limited.  A cable certifier gives far more valuable info.  But if I get your comments (bold) above, you ran a new cable, certified it, and the extender would not link.  Did I get it right??

If so, in that case, certifying the cable was zero value.  Replacing the cable is the only fix, and requires no $1000 test gear - which in your case was of no help.

That was a cut and paste typo. UsIng my iPhone. I did not have a certifier at the time. Should have said didn’t see if cable certifies.

More on this subject. Back in 2002 when I was in college still I got my first exposure to a cable certifier. It was a basic networking class early on in my degree where we learned how to terminate cat with rj45. After we got good at it he asked us to do our best possible termination then test it on the certifier. It was astonishing to see how anything less then an absolute stellar termination affected the speed the certifier would rate it for.

Just because a wire passes a map test ultimately means dick if it won’t pass the speeds it needs to. I’ve seen beautifully terminated cables only auto link up at 100 instead of gigabit at the switch. Reterminate and you might get Gigabit.

I could care less if no one wants to take the advice of adding a certifier to your arsenal. They save headaches plain and simple. IMHO any reputable firm should have them if they wanna be the best at their game in this field. The network is becoming one of the most important factors in these installs.

I got tired of being limited by a VDV. Even the $500 one I have. It’s a glorified continuity tester. They blow compared to a certifier.

FYI, a tech at Snap A/V indicated that it would require 100 Mb/s for the extender to work. This cable only made it to 10.

Is he saying you can pass an HD signal with 100Mb/s or is that to just get basic functionality?

This is what helps us charge for service calls, even on TelData installs.

We keep all test results of every project we work on.

This way when the customer calls saying "X" number of jacks or cables aren't working, we can show them the results. Basically, makes them pay for our service because it's not working for some other reason.

9 times out of 10, the problems come from customer misuse or stupidity!

This is very important for two reasons:
It's totally true.
Customers will often not believe anything is their fault without massively overwhelming evidence, and even then they'll have to be convinced.