jlfisher360
Newbie level 2
I'm new to this forum, but have been browsing quite a bit lately in search of a help for an idea of mine. I make devices PoE VoIP devices that I would like to perform some conformance testing on. I want to design a board that I can plug my devices into and get exact readings for voltage, resistance, etc so that I can make sure that my products work with the strictest PoE switches in terms of classification and the handshake process. Now I was thinking about either making some sort of a "middle-man" where a switch can plug into one side and my device into the other, and then either display the readings on a built in display or my computer, or my own 1-port PoE switch entirely. I came across a previous post https://www.edaboard.com/showthread.php?284927-PoE-Tester-Schematic that included some pictures of different ideas, but the thread died off with not a lot of information provided. Does anyone happen to know where I can get the complete picture of this schematic that was attached at the end of the post?
![LTC4257 (2).png LTC4257 (2).png](https://www.edaboard.com/data/attachments/30/30572-e4b3ad866b04f42b70c1f05ee6b641ca.jpg)
![LTC4257 (2).png LTC4257 (2).png](https://www.edaboard.com/data/attachments/30/30572-e4b3ad866b04f42b70c1f05ee6b641ca.jpg)