I recently ordered a WS POE Tester from amazon. When I connect it between our POE switch and a POE phone the phone does not turn on nor does the testers display light up. The phone is always connected on the output side and I have tried both input options. I tested the device as an eathernet pass-though and connected it to a computer and it worked. It appears the device is not working with POE and is DOA. I just want to confirm that it is DOA before returning to amazon to exchange with a new one. For refrence the switch is a Prosafe GS752TP and the phone is a Polycom vvx400.