NCS now represents Sifos Technologies (http://www.sifos.com/) in the Midwest.  Sifos products are Ethernet physical layer test devices to verify the PHY and/or POE capability of an Ethernet port to comply with standards or specific criteria.    For those who wish to  perform formal IEEE 802.3 physical compliance testing, including the 802.3at standard for POE, this is the solution you have been looking for.