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  • Those inexpensive ones only work for 10/100 which use separate pairs for Tx and Rx. GigE uses all 4 pairs bi-directionally, so it takes a more expensive tap design. But this could work if I decide I don't mind dropping the links I'm testing to 100Mbit while they're being tested.
    – Spiff
    Commented May 2, 2014 at 7:06