A quick google search shows there seems to only exist handheld testers for 10/100 Ethernet ports. Any ideas why that is and where we could find one that works with a Gigabit LAN? Perhaps the 10/100 would work.
closed as off topic by Lucas Kauffman, Ward, Zoredache, Mircea Vutcovici, sysadmin1138♦ May 3 '12 at 18:07
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There are true gigabit testers out there from Fluke, Blackbox, etc. but if all you are wanting to know is if the cable wiring is correct after you build a cable, then a 10/100 tester will work just fine.
Cat5e requirements are listed here: http://www.techrepublic.com/article/get-it-done-make-sure-your-network-cabling-is-ready-for-gigabit-speeds/5031804 for reference...if your 10/100 tester can test and certify cat5e cables, then you are fine.