Find switch port from field outlet?

Hi all. I am an electrician, with a basic cablers licence for data. For my job I am often put into commercial premises and need to diagnose faults on Cat 5/6 data outlets in the field. I have a pair tester and an F-Set.

If I'm lucky, the field outlet will be labelled. If it's not, and I want to pair test back to the patch panel, there is an awful lot of guessing involved back at the rack to find the right switch/patch panel port. The F-Set is useless as far as I can tell in this scenario, because if the circuit is connected all the way to the switch (which it most often is), it is shorted and I just get a constant error tone from the F-Set.

I came across an ad for this Shark Jack thing, first time I knew this kind of thing existed. Does this, or anything like it, make it possible to report the switch port number to me in the field? Seems to good to be true..

Also, is this the best type of pair tester? It is a bit cumbersome if I need to test many outlets, because it only reports the results on one end, so I have to walk rack-to-field twice to get each outlets results.