POE adapter performance

[IconicPCB]

I have been asked to to asses "quality" of a POE adapter consisting of some transient suppression circuitry ( gas arrester and solid state suppression TVS diodes).
I understand insertion loss and cross coupling are likely to be an issue.

What do the tests consist of?

Is there a single test that would offer an insight into how the adapter willperform?

Is it possible to use a loop through test ( using two NICs) and perhaps measure BER ?

Looking forward to an education...

[IconicPCB]

bump?

[nctnico]

I'd use a network analyser to measure the impedance versus frequency. Up to 200MHz is more than enough for 100Mbit ethernet.

[drussell]

Is there a single test that would offer an insight into how the adapter willperform?

Sure!  Put some in operation at your organization for a few years and see what transpires!   

You need to supply some better metrics as to what constitutes "performance"...

Will it supply some voltage to the device?  Probably...

Will it interfere with data communications on the wire?  I certainly hope not! 

Could you be more specific?