I have a need to trace a large number of CAT5E network cables, which may be connected to a network switch at the far end...

There are two ways to achieve this. The first is to use the JDSU TP607 LanRoamerPro Kit. This will allow you to trace (and test) cables in batches of 8. You would need to disconnect 8 cables at a time from the network switch, place the numbered remotes on these cables and then detect and re-connect. Alternatively, if you do not wish to disconnect any cables from the switch you can use the JDSU NT700 LanScaper network tester to hubblink each cable to identify it.